| Part # | # of pins | Description |
| HD74LS00 | DP-14, SOP-14 | Quad. 2-input NAND Gates |
| HD74LS01 | DP-14, SOP-14 | Quad. 2-input NAND Gates with Open Collector output |
| HD74LS02 | DP-14, SOP-14 | Quad. 2-input NOR Gates |
| HD74LS03 | DP-14, SOP-14 | Quad. 2-input NAND Gates with Open Collector output |
| HD74LS04 | DP-14, SOP-14 | Hex Inverters |
| HD74LS05 | DP-14, SOP-14 | Hex Inverters with Open Collector output |
| HD74LS06 | DP-14, SOP-14 | Hex Inverters Buffers/Drivers with Open Collector High-Voltage output |
| HD74LS07 | DP-14, SOP-14 | Hex Buffers/Drivers with Open Collector High-Voltage output |
| HD74LS08 | DP-14, SOP-14 | Quad. 2-input AND Gates |
| HD74LS09 | DP-14, SOP-14 | Quad. 2-input AND Gates with Open Collector output |
| HD74LS10 | DP-14, SOP-14 | Triple 3-input NAND Gates |
| HD74LS107A | DP-14, SOP-14 | Dual J-K Flip-Flops with Clear |
| HD74LS109A | DP-16, SOP-16 | Dual J-K Flip-Flops with Preset and Clear |
| HD74LS11 | DP-14, SOP-14 | Triple 3-input AND Gates |
| HD74LS112 | DP-16, SOP-16 | Dual J-K Flip-Flops with Preset and Clear |
| HD74LS113 | DP-14, SOP-14 | Dual J-K Flip-Flops with Preset |
| HD74LS114 | DP-14, SOP-14 | Dual J-K Flip-Flops with Preset, Common Clear, Common Clock |
| HD74LS12 | DP-14, SOP-14 | Triple 3-input NAND Gates with Open Collector output |
| HD74LS122 | DP-14, SOP-14 | Retriggerable Monostable Multivibrator with Clear |
| HD74LS123 | DP-16, SOP-16 | Dual Retriggerable Monostable Multivibrators with Clear |
| HD74LS125A | DP-14, SOP-14 | Quad. Bus Buffer Gates with 3-state outputs |
| HD74LS126A | DP-14, SOP-14 | Quad. Bus Buffer Gates with 3-state outputs |
| HD74LS13 | DP-14, SOP-14 | Dual 4-input NAND Gates Schmitt Triggers |
| HD74LS132 | DP-14, SOP-14 | Quad. 2-input NAND Schmitt Triggers |
| HD74LS136 | DP-14, SOP-14 | Quad. 2-input Exclusive-OR Gates with Open Collector output |
| HD74LS138 | DP-16, SOP-16 | 3-to-8 line Decoder/Demultiplexer |
| HD74LS139 | DP-16, SOP-16 | Dual 2 line-to-4 line Decoders/Demultiplexers |
| HD74LS14 | DP-14, SOP-14 | Hex Schmitt-trigger Inverters |
| HD74LS145 | DP-16, SOP-16 | BCD-to-Decimal Decoder/Driver with 15V outputs |
| HD74LS148 | DP-16, SOP-16 | 8 line-to-3 line Octal Priority Encoder |
| HD74LS15 | DP-14, SOP-14 | Triple 3-input AND Gates with Open Collector output |
| HD74LS151 | DP-16, SOP-16 | 1-of-8 line Data Selector/Multiplexer with strobe |
| HD74LS152 | DP-14, SOP-14 | 1-of-8 line Data Selector/Multiplexer |
| HD74LS153 | DP-16, SOP-16 | Dual 4 line-to-1 line Data Selectors/Multiplexers |
| HD74LS155 | DP-16, SOP-16 | Dual 2 line-to-4 line Decoders/Demultiplexers |
| HD74LS156 | DP-16, SOP-16 | Dual 2-to-4 line Decoders/Demultiplexers with Open Collector output |
| HD74LS157 | DP-16, SOP-16 | Quad. 2 line-to-1 line Data Selector/Multiplexer with noninverted outputs |
| HD74LS158 | DP-16, SOP-16 | Quad. 2 line-to-1 line Data Selectors/Multiplexers with inverted outputs |
| HD74LS160A | DP-16, SOP-16 | Synchronous Decade Counter with Direct Clear |
| HD74LS161A | DP-16, SOP-16 | Synchronous 4-bit Binary Counter with Direct Clear |
| HD74LS162A | DP-16, SOP-16 | Synchronous Decade Counter with Synchronous Clear |
| HD74LS163A | DP-16, SOP-16 | Synchronous 4-bit Binary Counter with Synchronous Clear |
| HD74LS164 | DP-14, SOP-14 | 8-bit Parallel-out Serial-In Shift Register |
| HD74LS165A | DP-16, SOP-16 | Parallel-load 8-bit Shift Register |
| HD74LS166A | DP-16, SOP-16 | 8-bit Shift Register |
| HD74LS170 | DP-16, SOP-16 | 4-by-4 Register File with Open Collector output |
| HD74LS174 | DP-16, SOP-16 | Hex D-type Flip-Flops with Clear |
| HD74LS175 | DP-16, SOP-16 | Quad. D-type Flip-Flops with Clear |
| HD74LS190 | DP-16, SOP-16 | Synchronous Up/Down Decade Counter with Single Clock Line |
| HD74LS191 | DP-16, SOP-16 | Synchronous Up/Down 4-bit Binary Counter with Single Clock Line |
| HD74LS192 | DP-16, SOP-16 | Synchronous Up/Down Decade Counter with Dual Clock Lines |
| HD74LS193 | DP-16, SOP-16 | Synchronous Up/Down 4-bit Binary Counter with Dual Clock Lines |
| HD74LS194A | DP-16, SOP-16 | 4-bit Bi-directional Universal Shift Register |
| HD74LS195A | DP-16, SOP-16 | 4-bit Parallel-Access Shift Register |
| HD74LS20 | DP-14, SOP-14 | Dual 4-input NAND Gates |
| HD74LS21 | DP-14, SOP-14 | Dual 4-input AND Gates |
| HD74LS22 | DP-14, SOP-14 | Dual 4-input NAND Gates with Open Collector output |
| HD74LS221 | DP-16, SOP-16 | Dual Monostable Multivibrators |
| HD74LS240 | DP-20N, SOP-20 | Octal Buffers/Line Drivers/Line Receivers with inverted 3-state outputs |
| HD74LS241 | DP-20N, SOP-20 | Octal Buffers/Line Drivers/Line Receivers with non-inverted 3-state outputs |
| HD74LS242 | DP-14, SOP-14 | Quad. Bus Transceivers with inverted 3-state outputs |
| HD74LS243 | DP-14, SOP-14 | Quad. Bus Transceivers with non-inverted 3-state outputs |
| HD74LS244 | DP-20N, SOP-20 | Octal Buffers/Line Drivers/Line Receivers with non-inverted 3-state outputs |
| HD74LS245 | DP-20N, SOP-20 | Octal Bus Transceivers with 3-state outputs |
| HD74LS247 | DP-16, SOP-16 | BCD-to-Seven Segment Decode/Driver with 15V outputs |
| HD74LS248 | DP-16, SOP-16 | BCD-to-Seven Segment Decode/Driver with Internal Pull-up outputs |
| HD74LS249 | DP-16, SOP-16 | BCD-to-Seven Segment Decode/Driver with Open Collector outputs |
| HD74LS251 | DP-16, SOP-16 | 1-of-8 Data Selector/Multiplexer with strobe and 3-state outputs |
| HD74LS253 | DP-16, SOP-16 | Dual 4 line-to-1 line Data Selector/Multiplexer with 3-state outputs |
| HD74LS257 | DP-16, SOP-16 | Quad. 2 line-to-1 line Data Selectors/Multiplexers with noninverted 3-state outputs |
| HD74LS258 | DP-16, SOP-16 | Quad. 2-to-1 line Data Selectors/Multiplexers with inverted 3-state outputs |
| HD74LS259 | DP-16, SOP-16 | 8-bit Addressable Latch |
| HD74LS26 | DP-14, SOP-14 | Quad. 2-input High-Voltage Interface NAND Gates |
| HD74LS266 | DP-14, SOP-14 | Quad. 2-input Exclusive-NOR Gates with Open Collector output |
| HD74LS27 | DP-14, SOP-14 | Triple 3-input NOR Gates |
| HD74LS273 | DP-20N, SOP-20 | Octal D-type Edge-triggered Flip-Flops with Clear |
| HD74LS279 | DP-16, SOP-16 | Quad. S-R Latches |
| HD74LS280 | DP-14, SOP-14 | 9-bit Odd/Even Parity Generator/Checker |
| HD74LS283 | DP-16, SOP-16 | 4-bit Binary Full Adder |
| HD74LS293 | DP-14, SOP-14 | 4-bit Binary Counter |
| HD74LS298 | DP-16, SOP-16 | Quad. 2-input Multiplexers with Storage |
| HD74LS299 | DP-20N, SOP-20 | 4-bit Universal Shift/Storage Register with 3-state outputs |
| HD74LS30 | DP-14, SOP-14 | 8-input NAND Gate |
| HD74LS32 | DP-14, SOP-14 | Quad. 2-input OR Gates |
| HD74LS365A | DP-16, SOP-16 | Hex Bus Drivers with noninverted 3-state outputs |
| HD74LS366A | DP-16, SOP-16 | Hex Bus Drivers with inverted 3-state outputs |
| HD74LS367A | DP-16, SOP-16 | Hex Bus Drivers with noninverted 3-state outputs |
| HD74LS368A | DP-16, SOP-16 | Hex Bus Drivers with inverted 3-state outputs |
| HD74LS37 | DP-14, SOP-14 | Quad. 2-input NAND Buffers |
| HD74LS373 | DP-20N, SOP-20 | Octal D-type Transparent Latches with noninverted 3-state output |
| HD74LS374 | DP-20N, SOP-20 | Octal D-type Flip-Flops with noninverted 3-state output |
| HD74LS375 | DP-16, SOP-16 | Quad. Bi-stable Latches |
| HD74LS38 | DP-14, SOP-14 | Quad. 2-input NAND Buffers with Open Collector output |
| HD74LS386 | DP-14, SOP-14 | Quad. 2-input Exclusive-OR Gates |
| HD74LS390 | DP-16, SOP-16 | Dual Decade Counters |
| HD74LS393 | DP-14, SOP-14 | Dual 4-bit Binary Counters |
| HD74LS40 | DP-14, SOP-14 | Dual 4-input NAND Buffers |
| HD74LS42 | DP-14, SOP-14 | BCD-to-Decimal Decoder |
| HD74LS47 | DP-16, SOP-16 | BCD-to-Seven Segment Decode/Driver with15V outputs |
| HD74LS48 | DP-14, SOP-14 | BCD-to-Seven Segment Decode/Driver with Internal Pull-up outputs |
| HD74LS49 | DP-14, SOP-14 | BCD-to-Seven Segment Decode/Driver with Open Collector outputs |
| HD74LS51 | DP-14, SOP-14 | 2-wide 2-input, 2-wide 3-input AND-OR-INVERT Gates |
| HD74LS54 | DP-14, SOP-14 | 4-wide 2-input, 3-input AND-OR-INVERT Gates |
| HD74LS55 | DP-14, SOP-14 | 2-wide 4-input AND-OR-INVERT Gates |
| HD74LS640 | DP-20N, SOP-20 | Octal Bus Transceivers with 3-state outputs |
| HD74LS640-1 | DP-20N | Octal Bus Transceivers with 3-state outputs |
| HD74LS641 | DP-20N, SOP-20 | Octal Bus Transceivers with non-inverted open-collector outputs |
| HD74LS641-1 | DP-20N | Octal Bus Transceivers with non-inverted open-collector outputs |
| HD74LS642 | DP-20N, SOP-20 | Octal Bus Transceivers with inverted open-collector outputs |
| HD74LS642-1 | DP-20N | Octal Bus Transceivers with inverted open-collector outputs |
| HD74LS645 | DP-20N, SOP-20 | Octal Bus Transceivers with non-inverted 3-state outputs |
| HD74LS645-1 | DP-20N | Octal Bus Transceivers with non-inverted 3-state outputs |
| HD74LS668 | DP-16, SOP-16 | Synchronous Up/Down Decade Counter |
| HD74LS669 | DP-16, SOP-16 | Synchronous Up/Down 4-bit Binary Counter |
| HD74LS670 | DP-16, SOP-16 | 4-by-4 Register File with 3-state outputs |
| HD74LS73A | DP-14, SOP-14 | Dual J-K Flip-Flops with Clear |
| HD74LS74A | DP-14, SOP-14 | Dual D-type Flip-Flops with Preset and Clear |
| HD74LS75 | DP-16, SOP-16 | Quad. Bi-stable Latches |
| HD74LS76A | DP-16, SOP-16 | Dual J-K Flip-Flops with Preset and Clear |
| HD74LS77 | DP-14, SOP-14 | 4-bit Bi-stable Latches |
| HD74LS78A | DP-14, SOP-14 | Dual J-K Flip-Flops with Preset, Common Clear, and Common Clock |
| HD74LS83A | DP-16, SOP-16 | 4-bit Binary Full Adder with Fast Carry |
| HD74LS85 | DP-16, SOP-16 | 4-bit Magnitude Comparator |
| HD74LS86 | DP-14, SOP-14 | Quad. 2-input Exclusive-OR Gates |
| HD74LS91 | DP-14, SOP-14 | 8-bit Shift Register |
| HD74LS92 | DP-14, SOP-14 | Divide-by-Twelve Counter |
| HD74LS93 | DP-14, SOP-14 | 4-bit Binary Counter |
| HD74LS95B | DP-14, SOP-14 | 4-bit Parallel Access Shift Register |
*Note:
Open Collector (OC)- the input/output requires/produces a negative potential (not open connection) to be considered "O input/output". An open input/output automatically denotes a "1 input/output". Usually, odd ending product # are OC.
The HD prefix (or any prefix for that matter) only denotes the manufacturer of the component. In this case it stands for Hitachi.
I acquired this list from Hitachi Semiconductors.