Overview
The MC74HC595ADR2, produced by onsemi, is a high-performance silicon-gate CMOS 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs. This device integrates an 8-bit shift register and an 8-bit D-type latch, allowing for flexible data handling and output configurations. It is designed to interface directly with the SPI serial data port on CMOS microprocessors and microcontrollers, making it a versatile component for various digital systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | –0.5 to +6.5 | V |
| DC Input Voltage (VIN) | –0.5 to VCC + 0.5 | V |
| DC Output Voltage (VOUT) | –0.5 to VCC + 0.5 | V |
| DC Input Current, per Pin (IIN) | ±20 | mA |
| DC Output Current, per Pin (IOUT) | ±35 | mA |
| DC Supply Current, VCC and GND Pins (ICC) | ±75 | mA |
| Storage Temperature (TSTG) | –65 to +150 | °C |
| Maximum Clock Frequency (fmax) at VCC = 6.0V | 35 | MHz |
| Maximum Propagation Delay, Shift Clock to SQH | 28 ns | ns |
| Package Type | SOIC-16 |
Key Features
- 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs.
- High-performance silicon-gate CMOS technology.
- Independent clock inputs for shift register and latch.
- Asynchronous reset for the shift register.
- Output drive capability: 15 LSTTL loads.
- Inputs compatible with Standard CMOS outputs; with pull-up resistors, compatible with TTL outputs (MC74HC595A).
- Inputs compatible with Standard CMOS or TTL outputs (MC74HCT595A).
- Active-low output enable allows outputs to be in a high-impedance state.
Applications
- Microprocessor and microcontroller systems requiring serial-to-parallel data conversion.
- Display drivers and LED drivers.
- Peripheral interface circuits.
- General-purpose serial data transmission and reception.
- Automotive and industrial control systems.
Q & A
- What is the primary function of the MC74HC595ADR2?
The MC74HC595ADR2 is an 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs, designed for serial-to-parallel data conversion.
- What are the input voltage compatibility options for the MC74HC595A and MC74HCT595A?
The MC74HC595A inputs are compatible with Standard CMOS outputs and, with pull-up resistors, with TTL outputs. The MC74HCT595A inputs are compatible with both Standard CMOS and TTL outputs.
- What is the maximum clock frequency for the MC74HC595A at VCC = 6.0V?
The maximum clock frequency is 35 MHz at VCC = 6.0V.
- How does the output enable pin function?
The output enable pin is active-low, allowing the outputs to be in a high-impedance state when set high.
- What is the storage temperature range for the MC74HC595ADR2?
The storage temperature range is –65 to +150°C.
- What package types are available for the MC74HC595ADR2?
The device is available in SOIC-16, TSSOP-16, and QFN16 packages.
- How does the asynchronous reset function work?
The asynchronous reset input resets the shift register portion of the device only, without affecting the 8-bit latch.
- What is the propagation delay from the shift clock to the serial output (SQH)?
The maximum propagation delay from the shift clock to SQH is 28 ns at VCC = 6.0V.
- Can the MC74HC595ADR2 be used in automotive and industrial applications?
Yes, it is suitable for use in automotive and industrial control systems due to its robust specifications and compatibility with various input/output standards.
- Where can I find detailed timing requirements for the MC74HC595ADR2?
Detailed timing requirements can be found in the datasheet, specifically in the sections on AC electrical characteristics and timing diagrams.
