Overview
The MC74HCT595ADR2G is a high-performance silicon-gate CMOS 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs, produced by onsemi. This device integrates an 8-bit shift register and an 8-bit D-type latch, providing both serial and parallel data output capabilities. It is designed to interface directly with the SPI serial data port on CMOS MPUs and MCUs, and its inputs are compatible with both Standard CMOS and TTL outputs.
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 (ICC) | ±75 | mA |
| Storage Temperature (TSTG) | –65 to +150 | °C |
| Lead Temperature (TL) | 260 | °C (1 mm from case for 10 seconds) |
| Junction Temperature Under Bias (TJ) | ±150 | °C |
| Maximum Clock Frequency (fmax) at VCC = 4.5 to 5.5V | 30 MHz | MHz |
| Maximum Propagation Delay, Shift Clock to SQH | 28 ns (at VCC = 4.5 to 5.5V) | ns |
| Maximum Propagation Delay, Latch Clock to QA – QH | 28 ns (at VCC = 4.5 to 5.5V) | ns |
Key Features
- 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs.
- High-performance silicon-gate CMOS technology.
- Inputs compatible with Standard CMOS and TTL outputs.
- Output drive capability: 15 LSTTL loads.
- Asynchronous reset for the shift register.
- Independent clock inputs for shift register and latch.
- Active-low output enable allows data to be presented at the outputs or forces outputs into a high-impedance state.
- Direct interface with SPI serial data port on CMOS MPUs and MCUs.
Applications
- Microcontroller and microprocessor systems.
- Display drivers and LED drivers.
- Serial-to-parallel data conversion.
- Buffering and storage applications.
- General-purpose logic circuits requiring serial-to-parallel data conversion.
Q & A
- What is the primary function of the MC74HCT595ADR2G?
The primary function is to act as an 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs.
- What are the compatible input types for the MC74HCT595ADR2G?
The inputs are compatible with both Standard CMOS and TTL outputs.
- What is the maximum clock frequency for the MC74HCT595ADR2G at VCC = 4.5 to 5.5V?
The maximum clock frequency is 30 MHz.
- How does the output enable pin function?
The active-low output enable pin allows data to be presented at the outputs or forces the outputs into a high-impedance state.
- What is the purpose of the asynchronous reset pin?
The asynchronous reset pin resets the shift register portion of the device only, without affecting the 8-bit latch.
- What are the typical propagation delays for the MC74HCT595ADR2G?
The maximum propagation delay from shift clock to SQH is 28 ns, and from latch clock to QA – QH is also 28 ns at VCC = 4.5 to 5.5V.
- What are the storage and junction temperature limits for the MC74HCT595ADR2G?
The storage temperature range is –65 to +150°C, and the junction temperature under bias is ±150°C.
- What are the typical applications of the MC74HCT595ADR2G?
Typical applications include microcontroller and microprocessor systems, display drivers, LED drivers, and general-purpose logic circuits requiring serial-to-parallel data conversion.
- What is the output drive capability of the MC74HCT595ADR2G?
The output drive capability is 15 LSTTL loads.
- How does the device interface with other components?
The device directly interfaces with the SPI serial data port on CMOS MPUs and MCUs.
