Overview
The SN74HC164D is an 8-bit serial-in, parallel-out shift register produced by Texas Instruments. This component is widely used in digital circuitry to expand the number of output pins on microcontrollers, making it a valuable tool for electronics enthusiasts and engineers. It operates by serially shifting data into the module and providing parallel output control, which is particularly useful in projects where space and pin count are critical considerations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC) | 2.0 to 6.0 | V |
| Logic Switching Levels | CMOS | - |
| Output Drive Capability | ±5.2 | mA |
| Propagation Delay (tpd) | 12 | ns |
| Maximum Clock Frequency (fmax) | 78 | MHz |
| Number of Bits | 8 | - |
| Operating Temperature Range (Tamb) | -40 to 125 | °C |
| Package Type | SO14 (SOT108-1) | - |
| Package Dimensions | 8.65 mm × 3.91 mm | - |
Key Features
- Serial Input and Parallel Output: Data is entered serially through two inputs (A and B) and output in parallel through eight outputs (Q0 to Q7).
- Gated Serial Data Inputs: Either input can be used as an active HIGH enable for data entry through the other input.
- Asynchronous Master Reset: A LOW on the master reset input (CLR) clears the register and forces all outputs LOW, independently of other inputs.
- Wide Supply Voltage Range: Operates from 2.0 V to 6.0 V.
- Low Power Consumption: Maximum current consumption of 80 μA.
- High Noise Immunity: CMOS logic switching levels provide high noise immunity.
- Direct Clear and Fully Buffered Clock and Serial Inputs: Ensures reliable operation and easy integration into digital circuits.
Applications
- Expanding Microcontroller Outputs: The SN74HC164D is often used to expand the number of output pins on microcontrollers like Arduino and Raspberry Pi, making it ideal for projects with limited pin counts.
- Digital Circuitry: Suitable for various digital circuit applications where serial-to-parallel data conversion is necessary.
- Cascading Shift Registers: Multiple SN74HC164D modules can be cascaded to handle larger amounts of data, enhancing the flexibility and scalability of digital systems.
Q & A
- What is the primary function of the SN74HC164D?
The SN74HC164D is an 8-bit serial-in, parallel-out shift register, which means it converts serial input data into parallel output data.
- What is the operating voltage range of the SN74HC164D?
The SN74HC164D operates within a supply voltage range of 2.0 V to 6.0 V.
- How does the clock input work on the SN74HC164D?
Data is shifted on the LOW-to-HIGH transitions of the clock (CLK) input.
- What is the purpose of the CLR (Master Reset) pin?
A LOW on the CLR pin clears the register and forces all outputs LOW, independently of other inputs.
- Can the SN74HC164D be used with microcontrollers like Arduino?
Yes, the SN74HC164D is compatible with microcontrollers such as Arduino and Raspberry Pi, making it useful for expanding output pins.
- How many parallel output pins does the SN74HC164D have?
The SN74HC164D has eight parallel data output pins (Q0 to Q7).
- What is the maximum clock frequency for the SN74HC164D?
The maximum clock frequency for the SN74HC164D is 78 MHz.
- Does the SN74HC164D have any power-saving features?
Yes, the SN74HC164D has low power consumption, with a maximum current consumption of 80 μA.
- Can multiple SN74HC164D modules be cascaded?
Yes, multiple SN74HC164D modules can be cascaded to handle larger amounts of data.
- What is the package type of the SN74HC164D?
The SN74HC164D is available in an SO14 (SOT108-1) package.
