74LS164 8-bit Serial Shift Register
Package SOIC Series 74LS
74LS164 overview
The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS164 8-bit shift registers feature gated serial inputs and an asynchronous clear. The gated serial inputs (A and B) permit complete control over incoming data as a low at either input inhibits entry of the new data and resets the first flip-flop to the low level at the next clock pulse.
Key specifications
Supply Voltage
4.75 - 5.25Vdc
Maximum Clock Frequency
40Mhz
Power Dissipation
2mW/gate @100kHz
Minimum Output Current
8mA
Propagation Delay
10nS
Fan Out (TTL Loads)
20
Datasheet
164.pdf
74LS164 features
- Single 8-bit Shift Register with Gated Serial Inputs and Asynchronous Clear
- Fully Buffered Clock
- Clock Frequency up to 36MHz
- Operating Temperature up to 70°C
- Standard TTL Switching Voltages
74LS164 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | A | Serial Input Pin |
| 2 | B | Serial Input Pin |
| 3 | Q0 | Serial Output |
| 4 | Q1 | Serial Output |
| 5 | Q2 | Serial Output |
| 6 | Q3 | Serial Output |
| 7 | GND | Ground |
| 8 | CP | Clear Pin |
| 9 | MR' | Master Reset (Active Low) |
| 10 | Q4 | Serial Output |
| 11 | Q5 | Serial Output |
| 12 | Q6 | Serial Output |
| 13 | Q7 | Serial Output |
| 14 | VCC | Positive Supply |
74LS164 applications
- The shift registers are used for temporary data storage.
- The shift registers are also used for data transfer and data manipulation.
- The serial-in serial-out and parallel-in parallel-out shift registers are used to produce time delay to digital circuits.
More about 74LS164
74LS164 Alternative Equivalent
74LS165, 74LS166
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