Overview
The SN74HC164NSR is an 8-bit parallel-out serial shift register produced by Texas Instruments. This component is part of the HC164 series and is known for its wide operating voltage range, low power consumption, and versatile application in digital circuits. The device features AND-gated serial inputs, a fully buffered clock, and an asynchronous clear input, making it suitable for various digital logic applications.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Voltage Range | VCC | 2 | - | 6 | V |
| Output Drive at 5 V | IOH | -4 | - | -5.2 | mA |
| Input Current | II | - | - | ±1000 | nA |
| Power Consumption (ICC) | VI = VCC or 0, IO = 0 | - | - | 80 | μA |
| Clock Frequency at 25°C | fCLK | - | 31 | 36 | MHz |
| Propagation Delay (tpd) at 25°C | CLK to Q | 20 | - | 30 | ns |
| Setup Time before CLK↑ | tsu | 100 | - | 125 | ns |
| Hold Time, Data after CLK↑ | th | 5 | - | 5 | ns |
Key Features
- Wide Operating Voltage Range: 2 V to 6 V
- AND-Gated Serial Inputs: Enable/Disable functionality
- Fully Buffered Clock and Serial Inputs: Ensures reliable data transfer
- Direct Clear Input: Asynchronous clear capability
- Low Power Consumption: Maximum ICC of 80 μA
- High Output Drive: Up to ±4 mA at 5 V
- Low Input Current: Maximum of 1 μA
- High-Speed Operation: Clock frequency up to 36 MHz at 25°C
Applications
- Programmable Logic Controllers: For sequential logic operations
- Appliances: In various control and display systems
- Video Display Systems: For data serialization and deserialization
- Output Expander Logic: To increase the number of output lines in a system
Q & A
- What is the operating voltage range of the SN74HC164NSR?
The operating voltage range is from 2 V to 6 V.
- How does the AND-gated serial input work?
The AND-gated serial inputs require a high signal on both A and B inputs to set the input data line high; a low signal on either input sets the input data line low.
- What is the maximum clock frequency at 25°C?
The maximum clock frequency at 25°C is 36 MHz.
- How does the asynchronous clear (CLR) input function?
Applying a low signal to the CLR pin sets all registers to 0 immediately.
- What is the typical propagation delay (tpd) at 25°C?
The typical propagation delay (tpd) at 25°C is 20 ns.
- Can the SN74HC164NSR drive multiple LSTTL loads?
Yes, it can drive up to 10 LSTTL loads.
- What is the maximum power consumption of the SN74HC164NSR?
The maximum power consumption (ICC) is 80 μA.
- How does the setup time before CLK↑ affect the operation?
The setup time before CLK↑ must be at least 100 ns to ensure proper data transfer.
- What is the hold time, data after CLK↑?
The hold time, data after CLK↑, is 5 ns.
- In what types of applications is the SN74HC164NSR commonly used?
It is commonly used in programmable logic controllers, appliances, video display systems, and as an output expander logic.
