MOS/CMOS INTEGRATED CIRCUITS

INTRODUCTION

MOS ICs CAN CONTAIN MORE FUNCTIONS PER CHIP THAN TTL/LS AND ARE VERY EASY TO USE. MOST CHIPS IN THIS SECTION ARE CMOS (COMPLEMENTARY MOS). THEY CONSUME VERY LITTLE POWER AND OPERATE OVER A +3-15 VOLT RANGE. CMOS CAN BE POWERED BY THIS:

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OR YOU CAN USE A LINE POWERED SUPPLY MADE FROM A 7805/7812/7815. SEE THE LINEAR SECTION.

INCIDENTALLY, YOU CAN POWER A CMOS CIRCUIT FROM TWO SERIES CONNECTED PENLIGHT CELLS, BUT A 9-12 VOLT SUPPLY WILL GIVE BETTER PERFORMANCE.

OPERATING REQUIREMENTS

1. THE INPUT VOLTAGE SHOULD NOT EXCEED VDD! (TWO EXCEPTIONS: THE 4049 AND 4050.)

2. AVOID, IF POSSIBLE, SLOWLY RISING AND FALLING INPUT SIGNALS SINCE THEY CAN CAUSE EXCESSIVE POWER CONSUMPTION. RISETIMES FASTER THAN 15 MICROSECONDS ARE BEST:

3. ALL UNUSED INPUTS MUST BE CONNECTED TO VDD (+) OR VSS (GND). OTHERWISE ERRATIC CHIP BEHAVIOR AND EXCESSIVE CURRENT CONSUMPTION WILL OCCUR.

4. NEVER CONNECT AN INPUT SIGNAL TO A CMOS CIRCUIT WHEN THE POWER IS OFF.

5. OBSERVE HANDLING PRECAUTIONS.

HANDLING PRECAUTIONS

A CMOS CHIP IS MADE FROM PMOS AND NMOS TRANSISTORS. MOS MEANS METAL - OXIDE - SILICON (OR SEMICONDUCTOR). P AND N REFER TO POSITIVE AND NEGATIVE CHANNEL MOS TRANSISTORS. AN NMOS TRANSISTOR LOOKS LIKE THIS:

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A PMOS TRANSISTOR IS IDENTICAL EXCEPT THE P AND N REGIONS ARE EXCHANGED. THE SiO2 (SILICON DIOXIDE) LAYER IS A GLASSY FILM THAT SEPARATES AND INSULATES THE METAL GATE FROM THE SILICON SUBSTRATE. THIS FILM IS WHY A MOS TRANSISTOR OR IC PLACES PRACTICALLY NO LOAD ON THE SOURCE OF AN INPUT SIGNAL. THE FILM IS VERY THIN AND IS THEREFORE EASILY PUNCTURED BY STATIC ELECTRICITY:

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PREVENT STATIC DISCHARGE!

1. NEVER STORE MOS IC’s IN NONCONDUCTIVE PLASTIC “SNOW,” TRAYS, BAGS OR FOAM.

2. PLACE MOS IC’s PINS DOWN ON AN ALUMINUM FOIL SHEET OR TRAY WHEN THEY ARE NOT IN A CIRCUIT OR STORED IN CONDUCTIVE FOAM.

3. USE A BATTERY POWERED IRON TO SOLDER MOS CHIPS. DO NOT USE AN AC POWERED IRON.

INTERFACING CMOS

1. IF SUPPLY VOLTAGES ARE EQUAL:

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2. DIFFERENT SUPPLY VOLTAGES:

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    NOTE THAT CMOS MUST BE POWERED BY AT LEAST 5 VOLTS WHEN CMOS IS INTERFACED WITH TTL. OTHERWISE THE CMOS INPUT WILL EXCEED VDD.

3. CMOS LED DRIVERS:

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    R=VDD−1.7.01image (FOR 10 mA LED CURRENT) USE 1000 OHMS FOR MOST APPLICATIONS.

CMOS LOGIC CLOCK

MANY CIRCUITS IN THIS SECTION REQUIRE A SOURCE OF PULSES. HERE’S A SIMPLE CMOS CLOCK:

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TYPICAL VALUES: R = 100K, C = 0.01–0.1 µF OK TO USE 4049 … BUT MUCH MORE CURRENT WILL BE REQUIRED.

CMOS TROUBLE SHOOTING

1. DO ALL INPUTS GO SOMEWHERE?

2. ARE ALL IC PINS INSERTED INTO THE BOARD OR SOCKET?

3. IS THE IC HOT? IF SO, SEE 1-2 ABOVE AND MAKE SURE THE OUTPUT IS NOT OVERLOADED.

4. DOES THE CIRCUIT OBEY ALL CMOS OPERATING REQUIREMENTS?

5. HAVE YOU FORGOTTEN A CONNECTION?

QUAD NAND GATE 4011

THE BASIC CMOS BUILDING BLOCK CHIP. MORE APPLICATIONS THAN TTL 7400/74LS00 QUAD NAND GATE.

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IMPORTANT: CONNECT ALL UNUSED INPUTS TO PIN 7 OR 14!

CONTROL GATE

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INVERTER

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AND GATE

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OR GATE

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AND-OR GATE

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NOR GATE

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4-INPUT NAND GATE

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EXCLUSIVE-OR GATE

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EXCLUSIVE-NOR GATE

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GATED OSCILLATOR

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OUTPUT FREQUENCY IS 1 KHz SQUARE WAVE.

SIMPLE OSCILLATOR

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OUTPUT NOT AS SYMMETRICAL AS ABOVE CIRCUIT.

GATED FLASHER

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LED FLASHES 1-2 Hz WHEN ENABLE IS HIGH. LED STAYS ON WHEN ENABLE IS LOW.

TOUCH SWITCH

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OUTPUT GOES HIGH WHEN TOUCH WIRES ARE BRIDGED BY A FINGER.

ONE-SHOT TOUCH SWITCH

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OUTPUT GOES HIGH WHEN TOUCH WIRES ARE BRIDGED BY A FINGER. OUTPUT THEN RETURNS LOW AFTER ABOUT 1 SECOND.

INCREASED OUTPUT DRIVE

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USE THIS METHOD TO INCREASE CURRENT THE 4011 CAN SOURCE OR SINK. OK TO ADD MORE GATES.

QUAD NOR GATE 4001

AN IMPORTANT CMOS BUILDING BLOCK CHIP. ITS HIGH IMPEDANCE INPUT MAKES POSSIBLE MORE APPLICATIONS THAN THE TTL 7402/74LS02 QUAD NOR GATE.

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IMPORTANT: CONNECT ALL UNUSED INPUTS TO PIN 7 OR 14.

BOUNCELESS SWITCH

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GATED TONE SOURCE

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TONE FREQUENCY IS ABOUT 1KHz.

RS LATCH

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INCREASED OUTPUT DRIVE

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USE THIS METHOD TO INCREASE CURRENT THE 4001 CAN SOURCE OR SINK. OK TO ADD MORE GATES.

LED FLASHER

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LED FLASHES 1-2 TIMES/SECOND.

OR GATE

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QUAD AND GATE 4081

BUILDING BLOCK CHIP. USE FOR BUFFERING AND LOGIC. NOT AS VERSATILE AS 4011.

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AND GATE BUFFER

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NAND GATE

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NOR GATE

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4-INPUT NAND GATE

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DIGITAL TRANSMISSION GATE

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AND-OR-INVERT GATE

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4-INPUT AND GATE

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QUAD EXCLUSIVE-OR GATE 4070

THE OUTPUT OF EACH GATE GOES LOW WHEN BOTH INPUTS ARE EQUAL. THE OUTPUT GOES HIGH IF THE INPUTS ARE UNEQUAL. MANY APPLICATIONS INCLUDING BINARY ADDITION, COMPARING BINARY WORDS AND PHASE DETECTION.

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IMPORTANT: CONNECT UNUSED INPUTS TO PIN 7 OR 14.

1-BIT COMPARATOR

THIS CIRCUIT IS ALSO A HALF-ADDER WITHOUT A CARRY OUTPUT.

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4-BIT COMPARATOR

DETERMINES IF TWO 4-BIT WORDS ARE EQUAL.

HINT: USE 4011 (P. 8-9) IF 4012 IS UNAVAILABLE.

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IF DCBA = D′C′B′A′ OUTPUT IS LOW. OTHERWISE OUTPUT IS HIGH. USE SECOND HALF OF 4012 AS INVERTER TO REVERSE OPERATION.

CONTROLLED INVERTER

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BINARY FULL ADDER

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PHASE DETECTOR

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LED STOPS GLOWING WHEN THE INPUT FREQUENCIES ARE EQUAL.

EXCLUSIVE-NOR

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8-INPUT EX-OR

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3-INPUT EX-OR

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10 MHz OSCILLATOR

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VDD = 3 TO 15 VOLTS

FREQUENCY VARIES WITH VDD:

VDD FREQUENCY AMPLITUDE
5 2.4 MHz 3.5 V
10 9.4 MHz 8.0 V
15 11.0 MHz 12.0 V

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SQUARE WAVE GENERATOR

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VDD = 3 TO 15 VOLTS

RISETIME = 50 NANOSECONDS

FREQUENCY = 2 MHz WHEN VDD = 10 VOLTS

HEX INVERTING BUFFER 4049

IN ADDITION TO STANDARD LOGIC AND CMOS TO TTL INTERFACING, OFTEN USED IN OSCILLATORS AND PULSE GENERATORS. FOR LOW CURRENT APPLICATIONS, USE 4011 CONNECTED AS INVERTER. (OK TO USE 4011 FOR CIRCUITS ON THIS PAGE.)

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CLOCK PULSE GENERATOR

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BOUNCELESS SWITCH

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SQUARE WAVE GENERATOR

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NOTE UNUSUAL LOCATION OF POWER SUPPLY PINS.

PHASE SHIFT OSCILLATOR

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TRIANGLE WAVE SOURCE

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LINEAR 10X AMPLIFIER

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NOTE THAT THE INVERTERS ARE USED IN A LINEAR MODE. GAIN = R2/R1.

HEX NON-INVERTING BUFFER 4050

PRIMARILY INTENDED FOR INTERFACING CMOS TO TTL. SUPPLIES MORE CURRENT THAN STANDARD CMOS.

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NOTE UNUSUAL LOCATION OF POWER SUPPLY PINS.

IMPORTANT: ALL UNUSED INPUTS MUST GO TO PIN 1 OR 8.

OUTPUT EXPANDER

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OUTPUT BUFFER

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CMOS TO CMOS AT LOWER VDD

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LOGIC PROBE

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LED GLOWS WHEN INPUT IS LOW.

INCREASED OUTPUT DRIVE

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CMOS TO TTL/LS AT LOWER VCC

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DUAL 4-INPUT NAND GATE 4012

VERY USEFUL IN MAKING DECODERS. ALSO CAN BE USED TO ADD ONE OR MORE ENABLE INPUTS TO VARIOUS CIRCUITS.

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ENABLE INPUT

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1-OF-4 DECODER

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WHEN ENABLE IS L, THE OUTPUT CORRESPONDING TO THE BA BINARY INPUTS GOES LOW. ALL OTHER OUTPUTS GO HIGH WHEN ENABLE IS H.

BCD DECODERS

DECMIMAL 0

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DECIMAL 1

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DECIMAL 9

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TRIPLE 3-INPUT NAND GATE 4023

HANDY FOR MAKING CUSTOM DECODERS, CONVERTERS AND MULTIPLE INPUT GATES.

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IMPORTANT: CONNECT ALL UNUSED INPUTS TO PIN 7 OR 14.

6-INPUT OR GATE

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DECIMAL-TO-BCD CONVERTER

DECIMAL IN (SELECTED DIGIT H, ALL OTHERS L.)

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9-INPUT NAND GATE

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ALL UNUSED INPUTS MUST BE GROUNDED.

1-OF-4 DECODER

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QUAD BILATERAL SWITCH 4066

ONE OF THE MOST VERSATILE CMOS CHIPS. PINS A, B, C AND D CONTROL FOUR ANALOG SWITCHES. CLOSE A SWITCH BY CONNECTING ITS CONTROL PIN TO VDD. ON RESISTANCE = 80–250 OHMS. OPEN A SWITCH BY CONNECTING ITS CONTROL PIN TO GROUND (PIN 7). OFF RESISTANCE = 109 OHMS. I/O (INPUT/OUTPUT) AND O/I PINS ARE REVERSIBLE.

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DATA BUS CONTROL

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CONTROL :

L = OFF

H = LOAD

DATA SELECTOR

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MAKE SELECTED INPUT H. KEEP ALL DATA SELECT OTHERS L.

DIGITAL TO ANALOG (D/A) CONVERTER

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THIS IS NOT A LINEAR D/A CONVERTER. INSTEAD IT PRODUCES A PSEUDO-RANDOM OUTPUT THAT RANGES FROM 3.06 − 5.62 VOLTS (VDD = 9 V). USE TO DRIVE 4046 VCO OR PRODUCE UNUSUAL WAVEFORMS. R = 47K AND 2R = 100K.

PROGRAMMABLE GAIN AMPLIFIER

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0000 TO 1111 AT DCBA GIVES RIN OF FROM R TO R/15

PROGRAMMABLE FUNCTION GENERATOR

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PRODUCES REPETITIVE 10-STEP WAVEFORM. PROGRAM HEIGHT OF EACH STEP VIA R1-R10. VARY RATE VIA R11 AND C1.

1024-BIT STATIC RAM 2102L

1024 1-BIT STORAGE LOCATIONS ADDRESSED BY PINS A0-A9. TTL/LS COMPATIBLE. CE (CHIP ENABLE) INPUT CONTROLS R/W (READ/WRITE) OPERATIONS). 3-STATE OUTPUTS.

CE R/W OPERATION
L L WRITE (LOADS BIT AT PIN 11)
L H READ (OUTPUTS BIT AT PIN 12)
H X H1 Z (OUTPUT ENTERS THIRD STATE)
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2102L ADDRESSING CIRCUIT

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THE ADDRESS INPUTS MUST BE STABLE DURING R/W OPERATIONS.

ADDING PROGRAMMED OR MANUAL JUMP

ADD THESE CONNECTIONS TO THE ADDRESSING CIRCUIT ON FACING PAGE.

SA–SJ: USE 8-POSITION DIP SWITCHES OR MINIATURE TOGGLES. OPEN = H; CLOSED = L

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NORMALLY THE LOAD INPUT IS HIGH. MAKING LOAD LOW LOADS THE ADDRESS PROGRAMMED IN SWITCHES SA-SJ INTO THE 74193’s. THIS PERMITS A PROGRAMMED JUMP OR A MANUAL JUMP TO ANY ADDRESS.

SINGLE I/O PORT

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ADD THIS CIRCUIT TO THE ADDRESSING CIRCUIT ON FACING PAGE. WHEN I/O (INPUT/OUTPUT) CONTROL IS H, PIN 3 OF THE 74LS367 ENTERS THIRD STATE (H1-Z) AND I/O PORT ACCEPTS INPUT DATA. WHEN PIN 3 OF THE 74LS367 IS L, I/O PORT OUTPUTS DATA. BOTH THESE OPERATIONS ARE DEPENDENT UPON THE STATUS OF THE 2102L CONTROL INPUTS.

CASCADING 2102L’S

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1024 × 4-BIT RAM 2114L/4045

1024-4-BIT STORAGE LOCATIONS ADDRESSED BY PINS A0-A9. TTL/LS COMPATIBLE. FOR READ/WRITE OPERATIONS, CE (CHIP ENABLE, ALSO CALLED CHIP SELECT) MUST BE LOW. WE INPUT MUST BE LOW TO WRITE (LOAD) DATA INTO CHIP. WHEN WE IS HIGH, DATA IN ADDRESSED LOCATION APPEARS AT INPUT/OUTPUT PINS. IDEAL CHIP FOR DO-IT-YOURSELF MICROCOMPUTERS AND CONTROLLERS.

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2114L ADDRESSING CIRCUIT

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THE ADDRESS INPUTS MUST REMAIN STABLE DURING R/W OPERATIONS.

1024 × 4-BIT RAM (CONTINUED) 2114L/4045

MANUAL JUMP: 1. SET SWITCHES A-J TO DESIRED ADDRESS; 2. PRESS S6.

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1024-NIBBLE DATA LOADING CIRCUIT

(NIBBLE = 4-BIT WORD OR 1/2 8-BIT WORD)

USE THIS CIRCUIT TO MANUALLY STORE UP TO 1024 4-BIT WORDS IN A 2114L. AFTER THE DATA IS LOADED, IT CAN THEN BE READ BACK AT THE CLOCK SPEED. THE DATA OUTPUTS ARE PINS 11-14 WHEN DATA INPUT SWITCHES ARE AT NEUTRAL.

WRITE:

1. SWITCH S2 TO THE BOUNCELESS PUSHBUTTON.

2. SWITCH S4 AND S5 TO L.

3. CLOSE S3.

4. INPUT DATA.

5. PRESS BOUNCELESS PUSHBUTTON.

6. REPEAT STEPS 1-5.

READ:

1. OPEN S3.

2. SWITCH S5 TO H.

3. CLOSE, THEN OPEN, S1.

4. SELECT CLOCKED OR MANUAL OUTPUT (S2).

NOTE:

BEST TO OUTPUT DATA THROUGH 74LS367 HEX BUFFER.

DATA INPUT SWITCHES (SPOT WITH NEUTRAL CENTER)

S5-WRITE ENABLE

DUAL D FLIP-FLOP 4013

VERY VERSATILE PAIR OF D-TYPE FLIP-FLOPS. GROUND UNUSED INPUTS.

1-OF-4 SEQUENCER

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OUTPUTS GO H IN SEQUENCE. ALL OTHERS STAY L.

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DIVIDE-BY-2

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MODULO-8 COUNTER

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SERIAL IN/OUT, PARALLEL OUT SHIFT REGISTER

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DUAL JK FLIP FLOP 4027

USE FOR DIVIDERS, COUNTERS AND REGISTERS. S (SET) AND R (RESET) INPUTS MUST BE LOW FOR CLOCKING TO OCCUR. MAKING S OR R HIGH SETS OR RESETS FLIP-FLOP INDEPENDENT OF CLOCK. IMPORTANT: ALL INPUTS MUST GO SOMEWHERE!

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DIVIDE-BY-2 COUNTER

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DIVIDE-BY-5 COUNTER

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DIVIDE-BY-3 COUNTER

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DIVIDE-BY-4 COUNTER

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4-BIT SERIAL SHIFT REGISTER

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QUAD LATCH 4042

FOUR BISTABLE LATCHES. CAN BE USED AS A 4-BIT DATA REGISTER. ALL FOUR LATCHES ARE CLOCKED SIMULTANEOUSLY. POLARITY PIN PROVIDES CLOCKING FLEXIBILITY.

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4-BIT DATA LATCH

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Table 1

Growth of Silica Particles by Heating a 4% Sol of Silicic Acid at pH 8–10.

CLOCK POLARITY Q
0 0 D
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1 1 D
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DATA ON BUS APPEARS AT OUTPUTS. DATA IS LATCHED (SAVED) WHEN CLOCK SWITCHES.

STEPPED WAVE GENERATOR

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TYPICAL VALUES: R1 = R3 = 22K
  R2 = 33K

DUAL ONE-SHOT 4528

TWO FULLY INDEPENDENT MONOSTABLE MULTIVIBRATORS. BOTH CAN BE RETRIGGERED. TRIGGER CAN BE RISING OR FALLING EDGE OF PULSE. T1 AND T2 ARE TIMING INPUTS. RST IS RESET AND ± IN ARE TRIGGER INPUTS.

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POSITIVE ONE-SHOT

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PULSE DELAYER

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R1 CONTROLS DELAY TIME.

R2 CONTROLS DELAYED PULSE WIDTH.

STEPPED TONE GENERATOR

TO CONTROL WITH LIGHT, USE CdS PHOTOCELL FOR R1.

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ADJUST R1 TO CREATE UNIQUE STEPPED TONE. R2 CONTROLS FREQUENCY. OK TO EXPERIMENT WITH C1 AND C2. R3 CONTROLS GAIN.

14-STAGE BINARY COUNTER 4020

A RIPPLE COUNTER WITH CARRY OUTPUT. THE 14-STAGE BINARY COUNT IS COMPLETED IN 16,384 CLOCK PULSES. THIS MAKES POSSIBLE VERY LONG DURATION TIMERS, ASSUMING THE OUTPUTS ARE DECODED. THE OUTPUTS REQUIRE A BRIEF SETTLING TIME AFTER EACH CLOCK PULSE.

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14-BIT BINARY COUNTER

THE SECOND AND THIRD OUTPUTS (÷4 AND ÷8) OF THE 4020 ARE NOT AVAILABLE. THIS CIRCUIT INCLUDES A 3-BIT COUNTER TO SUPPLY THE MISSING OUTPUTS. A IS THE LOWEST ORDER OUTPUT.

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STAIRCASE GENERATOR

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OUTPUT IS A STEPPED VOLTAGE. APPLICATIONS INCLUDE ANALOG-TO-DIGITAL CONVERSION AND WAVEFORM SYNTHESIS.

DUAL BCD COUNTER 4518

TWO SYNCHRONOUS DECADE COUNTERS IN ONE PACKAGE. WHEN ENABLE IS HIGH AND RESET IS LOW, EACH COUNTER ADVANCES ONE COUNT PER CLOCK PULSE.

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CASCADED BCD COUNTERS

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THE TWO GATES TRIGGER THE SECOND COUNTER AT HLLH (DECIMAL 9).

OK TO OMIT THE 4011. IF SO, CONNECT PIN 6 OF FIRST 4518 TO PIN 10 OF SECOND 4518. GROUND PIN 9 OF SECOND 4518 AND APPLY INPUT TO PIN 1 OF FIRST 4518.

BCD KEYBOARD ENCODER

PRESS S0-S9, THEN TOGGLE RESET SWITCH S10 TO VDD AND BACK TO GROUND. BCD EQUIVALENT OF SELECTED KEY (S0-S9)

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DECADE COUNTER/DIVIDER 4017

SEQUENTIALLY MAKES 1-OF-10 OUTPUTS HIGH (OTHERS STAY LOW) IN RESPONSE TO CLOCK PULSES. MANY APPLICATIONS. COUNT TAKES PLACE WHEN PINS 13 AND 15 ARE LOW.

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RANDOM NUMBER GENERATOR

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COUNT TO N AND HALT

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COUNT TO N AND RECYCLE

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0-99 COUNTER

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BCD KEYBOARD ENCODER

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FREQUENCY DIVIDER

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CLOSE S1-S10 TO DIVIDE FREQUENCY BY FROM 1 TO 10.

3-DIGIT BCD COUNTER MC14553

COMPLETE 3-DIGIT COUNTER. USE FOR DO-IT-YOURSELF EVENT AND FREQUENCY COUNTERS. BEGINNERS: GET SOME PRACTICAL CIRCUIT EXPERIENCE BEFORE USING THIS CHIP. PIN EXPLANATIONS: DS (DIGIT SELECT) 1, 2,3–SEQUENTIALLY STORBES READOUTS. LE—LATCH ENABLE (WHEN H). DIS — INHIBITS INPUT WHEN H. CLOCK–INPUT. MR–MASTER RESET (WHEN H). OF — OVERFLOW. A, B, C, D — BCD OUTPUTS.

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3-DIGIT EVENT COUNTER

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6-DIGIT FREQUENCY COUNTER

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6-DIGIT COUNTER

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THIS CIRCUIT SHOWS HOW TO CASCADE TWO 3-DIGIT COUNTERS. MAXIMUM COUNT IS 999,999. DISPLAYS ARE COMMON CATHODE (COMMON ANODE CONFIGURATION SHOWN ON PREVIOUS PAGE.) NOTE THAT PIN 6 OF 14543 (OR 4543) GOES TO GND INSTEAD OF VDD WHEN COMMON CATHODE DISPLAY IS USED.

FREQUENCY COUNTER:

USE INPUT AND CONTROL CIRCUIT ON PREVIOUS PAGE. INPUT FREQUENCY SHOULD NOT EXCEED VDD. NON-SQUARE WAVE INPUTS MAY REQUIRE INPUT TAILORING. USE COMPARATOR TO SHARPEN SLOW RISING AUDIO SIGNALS.

INPUT BUFFER

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BCD-TO-DECIMAL DECODER 4028

DECODES 4-BIT BCD INPUT INTO 1-OF-10 OUTPUTS. SELECTED OUTPUT GOES HIGH; ALL OTHERS STAY LOW. USE FOR DECIMAL READOUTS, SEQUENCERS, PROGRAMMABLE COUNTERS, ETC.

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0-9 SECOND TIMER

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OK TO USE OUTPUTS TO CONTROL EXTERNAL LOGIC OR DEVICES.

COUNT TO N AND RECYCLE

USE THE ADJACENT CIRCUIT WITH THESE CHANGES:

1. OMIT 4049

2. MAKE PIN 2 HIGH

3. USE PIN 7 AS CONTROL INPUT.

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1-OF-8 DECODER

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COUNT TO N AND HALT

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BCD-TO-7-SEGMENT LATCH/DECODER/DRIVER 4511

CONVERTS BCD DATA INTO FORMAT SUITABLE FOR PRODUCING DECIMAL DIGITS ON 7-SEGMENT LED DISPLAY. INCLUDES BUILT-IN 4-BIT LATCH TO STORE DATA TO BE DISPLAYED (WHEN PIN 5 IS HIGH). WHEN LATCH IS NOT USED (PIN5 LOW), THE 7-SEGMENT OUTPUTS FOLLOW THE BCD INPUTS. MAKE PIN 4 LOW TO EXTINGUISH THE DISPLAY AND HIGH FOR NORMAL OPERATION. MAKE PIN 3 LOW TO TEST THE DISPLAY AND HIGH FOR NORMAL OPERATION.

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DISPLAY FLASHER

DISPLAY FLASHES ONCE PER SECOND WHEN E IS HIGH.

E DISPLAY
H FLASHES
L OFF
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DECIMAL COUNTING UNIT (DCU)

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OPERATION:

TO COUNT, ENABLE IS HIGH AND RESET IS LOW. BLANK SHOULD BE HIGH (LOW TURNS OFF DISPLAY). SAVE SHOULD BE LOW. MAKE SAVE HIGH TO STORE INTERIM COUNT WITHOUT AFFECTING COUNTER.

IMPORTANT: ALL INPUTS MUST GO SOMEWHERE!

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COMMON CATHODE LED DISPLAY

8-STAGE SHIFT REGISTER 4021

PARALLEL INPUT/SERIAL OUTPUT SHIFT REGISTER. ALSO SERIAL INPUT. DATA AT PARALLEL INPUTS IS FORCED INTO THE REGISTER IRRESPECTIVE OF THE CLOCK STATUS WHEN PIN 9 IS MADE HIGH. KEEP PIN 9 LOW FOR NORMAL OPERATION.

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PARALLEL-TO-SERIAL DATA CONVERTER

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ALL 1’S (H’S) ARE SENT AFTER THE 8-BIT WORD IS TRANSMITTED.

8-STAGE DELAY LINE

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THE FIRST PARALLEL INPUT (PIN 7) IS GROUNDED. THIS LOADS A SINGLE L WHEN S1 IS SWITCHED TO INITIATE. THE SINGLE L BIT REACHES THE OUTPUT AFTER 8 CLOCK PULSES.

PSEUDO-RANDOM SEQUENCER

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THIS CIRCUIT GENERATES A PSEUDO-RANDOM BIT SEQUENCE AND RECYCLES. * TO CHANGE BIT PATTERN, CONNECT DIFFERENT PATTERNS OF INPUTS OF SECOND 4021 TO VDD OR GROUND.

TO AUDIO AMPLIFIER FOR SOUND EFFECTS. (ADJUST R1; CHANGE SOUND WITH S1.)

ANALOG MULTIPLEXER 4051

INPUT ADDRESS AT CBA SELECTS 1-OF-8 ANALOG SWITCHES. SIGNAL AT SELECTED SWITCH I/O (INPUT/OUTPUT) IS THEN APPLIED TO COMMON O/I (OUTPUT/INPUT). THE INPUT SIGNAL MUST NOT EXCEED VDD. THE INHIBIT (INH) INPUT SHOULD BE GROUNDED FOR NORMAL OPERATION. ALL SWITCHES ARE OPEN WHEN INH IS HIGH.

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1-OF-8 MULTIPLEXER

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1-OF-8 DATA SELECTOR (DEMULTIPLEXER)

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TONE SEQUENCER

CYCLES THROUGH 8 TONES AND REPEATS. R1 CONTROLS TEMPO. R2-R9 ARE INDIVIDUAL TONE RESISTORS. USE 1K – 100K EACH.

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DO NOT REDUCE R10. USE AMPLIFIER FOR MORE VOLUME.

60-Hz TIMEBASE MM5369

PROVIDES PRECISE 60 Hz SQUARE WAVE WHEN USED WITH 3.579545 MHz COLOR TV CRYSTAL. USE FOR MOST DO-IT-YOURSELF TIMERS, CLOCKS, CONTROLLERS, FUNCTION GENERATORS. INSTALL IN SMALL CABINET FOR WORKBENCH PRECISION CLOCK.

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60-Hz TIMEBASE

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R1 – USE TWO 10M IN SERIES.

* MOTOROLA SPECIFIES THAT C1 = 30 pF AND C2 = 6.36 pF. OK TO USE SIX 4.7 pF CAPACITORS IN PARALLEL OR 47 pF CAPACITOR FOR C1. TRY TUNABLE CAPACITOR (e.g. 5-50 pF) FOR C2. TO TUNE, CONNECT FREQUENCY METER TO PIN 7. TUNE C2 UNTIL FREQUENCY IS 3,579,545 Hz. ACCURACY FAIRLY GOOD EVEN IF YOU DON’T TUNE C2.

10-Hz TIMEBASE

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1-Hz TIMEBASE

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OPERATION:

1. TOGGLE S1 FROM CLEAR TO READY.

2. SWITCH S2 FROM STOP TO START.

3. SWITCH S2 FROM START TO STOP.

DIGITAL STOPWATCH

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1 Hz = 00-99 SEC

10 Hz = 0.0-9.9 SEC

OK TO ADD MORE STAGES.

NOISE GENERATOR S2688/MM5837N

PRODUCES BROADBAND WHITE NOISE FOR AUDIO AND OTHER APPLICATIONS. THE NOISE QUALITY IS VERY UNIFORM. IT IS PRODUCED BY A 17-BIT SHIFT REGISTER WHICH IS CLOCKED BY AN INTERNAL OSCILLATOR.

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WHITE NOISE SOURCE

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CONNECT OUTPUT TO AUDIO AMPLIFIER TO HEAR NOISE. USE 7815 VOLTAGE REGULATOR TO OBTAIN + 15 VOLTS.

COIN TOSSER

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PRESS S1; BOTH LEDs GLOW. RELEASE S1 AND ONLY ONE GLOWS. GROUND INPUTS OF UNUSED HALF OF 4027 (PINS 9,10,11,12 AND 13). * (OK TO USE 9-VOLT BATTERY AS POWER SUPPLY.)

PINK NOISE SOURCE

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CHANGE R AND C TO ALTER NOISE SPECTRUM. ALSO, TRY LOWER SUPPLY VOLTAGES TO CHANGE SPECTRUM.

SNARE/BRUSH NOISE

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PRESS S1 TO OPERATE. INCREASE C2 AND C3 TO LOWER OUTPUT FREQUENCY.

NOTES

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