Modern TTL Circuits Manual (eBook)

Front Cover 1
Modern TTL Circuits Manual 4
Copyright Page 5
Table of Contents 6
Dedication 5
Preface 8
Chapter 1. TTL principles and families 10
Digital IC basics 10
Digital waveform basics 14
Basic logic-IC families 17
Basic TTL circuit variations 21
The '74' series of digital ICs 23
TTL sub-families 26
CMOS ''74'-series sub-families 31
Which sub-family is best? 32
TTL logic levels and noise immunity 34
Fan-in and fan-out 37
TTL basic usage rules 40
Power supplies 40
Input signals 42
Unused inputs 42
Interfacing 43
Input interfacing 43
Output interfacing 45
Logic family interfacing 48
Chapter 2. TTL buffer, gate and logic circuits 52
Logic gate symbology 52
Logic gate functions 53
Boolean algebra basics 56
Boolean algebra rules/laws 58
Positive versus Negative logic 60
Practical logic-gate design 61
Practical TTL buffer circuits 62
Practical TTL inverter circuits 68
Practical AND-gate circuits 73
Practical NAND-gate circuits 75
Practical OR-gate circuits 77
Practical NOR-gate circuits 78
Practical EX-OR- and EX-NOR-gate circuits 81
Mixed gate ICs 85
Programmable logic ICs 86
Assertion-level logic notion 87
Mixed logic equivalents 88
Digital 'transmission' gates 89
Chapter 3. TTL waveform generator circuits 91
Waveform generator basics 91
Schmitt waveform shapers 93
Bistable waveform generators 95
Monostable pulse generators 100
Astable squarewave generators 111
Chapter 4. Clocked flip-flops and counters 118
Clocked flip-flop basics 118
The master-slave flip-flop 120
D and JK flip-flops 121
The 74LS74 D-type flip-flop IC 122
The 74LS73 JK-type flip flop IC 124
Circuit diagram symbology 127
Ripple counters 128
Large-bit ripple divider ICs 131
Output decoding 134
Walking-ring counters 135
The 'Johnson' counter 138
The 74HC4017 Johnson counter 141
Synchronous or asynchronous counting? 147
Counter 'coding' systems 148
The 74LS90 IC 149
Greater-than-10 division 154
The 74LS390 IC 155
Chapter 5. Special counter/dividers 159
Back to basics 159
'Programmable' counters 162
'Down' counters 166
PDDC applications 169
'Up/down' counters 171
'Add/subtract' circuits 176
'Up/down' counter ICs 179
Chapter 6. Latches, registers,comparators and converters 184
Data latches 184
Data Latch ICs 188
Shift registers 189
Logic comparators 192
Code converters 193
Decoder/driver ICs 200
Chapter 7. Special purpose ICs and circuits 202
Multiplexing basics 202
TTL multiplexer ICs 204
TTL demultiplexer ICs 207
CMOS 'analogue switch' IC 210
Addressable latches 213
Full-adder ICs 215
Bus transceiver ICs 217
Miscellaneous TTL IC types 218
Index 222