Overview
The MC74HC595A, including the MC74HC595AFEL variant, is a high-performance silicon-gate CMOS integrated circuit produced by onsemi. This device consists of an 8-bit shift register and an 8-bit D-type latch with three-state parallel outputs. It accepts serial data and provides both serial and parallel outputs. The shift register and latch have independent clock inputs, and the device includes an asynchronous reset for the shift register. The MC74HC595A is designed to interface directly with the SPI serial data port on CMOS MPUs and MCUs, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC (DC Supply Voltage) | –0.5 to +6.5 | V |
| VIN (DC Input Voltage) | –0.5 to VCC + 0.5 | V |
| VOUT (DC Output Voltage) | –0.5 to VCC + 0.5 | V |
| IIN (DC Input Current, per Pin) | ±20 | mA |
| IOUT (DC Output Current, per Pin) | ±35 | mA |
| ICC (DC Supply Current, VCC and GND Pins) | ±75 | mA |
| TSTG (Storage Temperature) | –65 to +150 | °C |
| TL (Lead Temperature, 1 mm from Case for 10 Seconds) | 260 | °C |
| TJ (Junction Temperature Under Bias) | ±150 | °C |
| fmax (Maximum Clock Frequency at 50% Duty Cycle) | Up to 35 MHz (depending on VCC) | MHz |
| tPLH, tPHL (Maximum Propagation Delay, Shift Clock to SQH) | Up to 42 ns (depending on VCC) | ns |
Key Features
- 8-bit shift register and 8-bit D-type latch with three-state parallel outputs
- Independent clock inputs for shift register and latch
- Asynchronous reset for the shift register
- Direct interface with SPI serial data port on CMOS MPUs and MCUs
- Output drive capability: 15 LSTTL loads
- Outputs directly interface to CMOS, NMOS, and TTL
- Operating voltage range: 2.0 to 6.0 V
- Low input current: 1.0 mA
- High noise immunity characteristic of CMOS devices
- In compliance with JEDEC Standard No. 7A
- Pb-Free packages available
- Improved propagation delays and lower quiescent power compared to HC595
- Improved input noise and latchup immunity
Applications
The MC74HC595A is suitable for a wide range of applications due to its versatility and compatibility with various microprocessors and microcontrollers. Some common applications include:
- Display drivers and LED drivers
- Data transmission and storage systems
- Digital signal processing and frequency counters
- Computer networks and peripherals
- Automotive and industrial control systems
Q & A
- What is the MC74HC595A?
The MC74HC595A is an 8-bit serial-input/serial or parallel-output shift register with an 8-bit D-type latch and three-state parallel outputs.
- What is the operating voltage range of the MC74HC595A?
The operating voltage range is from 2.0 to 6.0 V.
- What is the maximum clock frequency of the MC74HC595A?
The maximum clock frequency is up to 35 MHz, depending on the supply voltage.
- Does the MC74HC595A have an asynchronous reset?
- What types of outputs does the MC74HC595A have?
The device has three-state parallel outputs and a serial output.
- Is the MC74HC595A compatible with TTL outputs?
- What is the output drive capability of the MC74HC595A?
The output drive capability is 15 LSTTL loads.
- Does the MC74HC595A have Pb-Free packages available?
- What are some common applications of the MC74HC595A?
- Is the MC74HC595A compliant with any industry standards?
