74LS164 DIP 8-Bit Serial-Input Parallel-Output Shift Register
The 74LS164 is a high speed TTL integrated circuit designed as an 8-bit edge-triggered shift register. It features a serial-input/parallel-output architecture where data is entered serially through a 2-input AND gate and shifted into the register on each positive-going transition of the clock pulse. This gated serial input provides a high degree of control over the incoming data stream, allowing one input to serve as a data enable for the other.
This IC is widely used in digital systems for serial-to-parallel data conversion, bit-pattern generation, and expanding the output capabilities of microcontrollers. It includes an asynchronous master reset input that, when pulled low, immediately clears all eight flip-flops and sets the outputs to a low logic level regardless of the clock or data inputs. The low power Schottky technology ensures fast shifting speeds with minimal power consumption, making it a reliable choice for high-speed data processing and control applications.
KEY FEATURES
- 8-bit serial-in to parallel-out data conversion
- Gated 2-input serial data inputs for enhanced control
- Fully buffered clock and serial inputs for signal integrity
- Asynchronous master reset for immediate register clearing
- Low power Schottky design for high frequency performance
- Standard 14 pin dual in line package
SPECIFICATIONS
- Supply Voltage 4.75V to 5.25V
- Operating Temperature 0 to 70 Celsius
- Logic Type TTL Low Power Schottky
- Maximum Clock Frequency 25MHz
- Typical Propagation Delay 17ns
- High Level Output Current -0.4mA
- Low Level Output Current 8mA
INTERFACES
- A Serial data input A
- B Serial data input B
- CP Clock input positive edge triggered
- MR Master reset active low
- Q0 to Q7 Parallel outputs
- VCC Positive supply voltage
- GND Ground reference
