The 74LS164 is a high-speed 8-Bit Serial-In Parallel-Out Shift Register. The input Serial data is given through a 2-Input AND gate synchronous with the LOW to HIGH transition of the clock. The IC also features gated serial inputs and an asynchronous clear pin. The 74LS164 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74LS164 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.
What is a Shift Register?
Shift registers are digital memory circuitry found in devices such as calculators, computers, and data processing systems. With a shift register, data or bits are entered into the system in a serial or parallel manner. data entry is done from one direction, and as more data is added, it shifts positions until the data gets to the output end. The two ends are referred to as the left and right end. Movement of data can be from left to right, from right to left, or in both directions to make a bidirectional register.
74LS164 Pinout
74LS164 Pin Configuration
| Pin No | Pin Name | Descrition |
|---|---|---|
| 1 | A | Data Input Pin A |
| 2 | B | Data Input Pin B |
| 3 | Q0 | Output pin Q0 |
| 4 | Q1 | Output pin Q1 |
| 5 | Q2 | Output pin Q2 |
| 6 | Q3 | Output pin Q3 |
| 7 | GND | Ground Pin |
| 8 | CP | Clock Pulse Input |
| 9 | MR’ | Active Low Master Reset |
| 10 | Q4 | Output pin Q4 |
| 11 | Q5 | Output pin Q5 |
| 12 | Q6 | Output pin Q6 |
| 13 | Q7 | Output pin Q7 |
| 14 | Vcc | Chip Supply Voltage |
74LS164 Features & Specifications
- Operating Voltage: 3V to 18V
- Supply Voltage – Max:5.25 V
- Propagation Delay Time: 25 ns
- Max. Clock Frequency: 36 MHz
- Operating Temperature Range: 0C to + 70 C
- Fully Buffered Clock
- Available in 16-pin PDIP, GDIP, PDSO packages
Applications
- Arithmetic-unit registers
- Sequence generators
- Control circuits
You can download this Datasheet for 74LS164 8-Bit Shift Register from the link given below:
See Also: 74LS92 4-Bit Divide By Twelve Binary Counter | 74LS73 Dual JK Negative Edge Triggered Flip-Flop | 74LS30 – 8 Input NAND Logic Gate IC
