Overview
The 74HC164D/AU118 is an 8-bit serial-in, parallel-out shift register produced by NXP USA Inc. This device is part of the 74HC logic family, known for its high-speed CMOS operation. It is designed to convert serial data into parallel data, making it a valuable component in various digital circuits. The 74HC164D/AU118 features two serial data inputs (DSA and DSB) and eight parallel data outputs (Q0 to Q7), allowing for efficient data transfer and processing.
Key Specifications
| Parameter | Value |
|---|---|
| Logic Type | Shift Register |
| Number of Elements | 1 |
| Number of Bits per Element | 8 |
| Function | Serial to Parallel |
| Voltage - Supply | 2 V ~ 6 V |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Output Type | Non-Inverted |
| Maximum Clock Frequency | 54 MHz @ 4.5 V |
| Current Consumption | 100 μA (max) |
| Output Current Source | ±25 mA |
Key Features
- CMOS low power dissipation
- High noise immunity
- Gated serial data inputs
- Asynchronous master reset
- Complies with JEDEC standards (JESD8C for 2.7 V to 3.6 V)
- Input levels: CMOS level for 74HC164
- Input clamp diodes to interface inputs to voltages in excess of VCC
- Available in various packages including 14-SOIC, PDIP, FK, SSOP, and CDIP
Applications
- Output operations in microcontrollers
- Smart switches
- Programmable display systems
- Video display systems
- Output expanders
- Controlling LED arrays or LCDs that support 8-bit parallel inputs
Q & A
- What is the primary function of the 74HC164D/AU118?
The primary function is to convert serial data into parallel data.
- How many serial data inputs does the 74HC164D/AU118 have?
It has two serial data inputs (DSA and DSB).
- What is the operating voltage range of the 74HC164D/AU118?
The operating voltage range is from 2 V to 6 V.
- What is the maximum clock frequency of the 74HC164D/AU118?
The maximum clock frequency is 54 MHz at 4.5 V.
- What type of logic levels does the 74HC164D/AU118 support?
It supports CMOS logic levels.
- How does the master reset function work on the 74HC164D/AU118?
A LOW on the master reset input (MR) clears the register and forces all outputs LOW, independently of other inputs.
- What are some common applications of the 74HC164D/AU118?
Common applications include output operations in microcontrollers, smart switches, programmable display systems, and video display systems.
- What package types are available for the 74HC164D/AU118?
It is available in various packages including 14-SOIC, PDIP, FK, SSOP, and CDIP.
- How does the device handle input voltages exceeding VCC?
The device includes input clamp diodes to interface inputs to voltages in excess of VCC.
- What is the current consumption of the 74HC164D/AU118?
The maximum current consumption is 100 μA.
