Overview
The MC74HC595ADTR2G 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 combines an 8-bit shift register and an 8-bit D-type latch, allowing for serial data input and both serial and parallel data output. It is designed to interface directly with the SPI serial data port on CMOS MPUs and MCUs, and its inputs are compatible with Standard CMOS outputs and, with pull-up resistors, TTL outputs.
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, 50% Duty Cycle) | Up to 35 MHz (depending on VCC) | MHz |
| tPLH, tPHL (Maximum Propagation Delay, Shift Clock to SQH) | Up to 140 ns (depending on VCC) | 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 outputs and, with pull-up resistors, TTL outputs.
- Asynchronous reset for the shift register.
- Independent clock inputs for shift register and latch.
- Output drive capability: up to 15 LSTTL loads.
- Active-low output enable allows data from the latches to be presented at the outputs or forces the outputs into a high-impedance state.
Applications
- Interface with SPI serial data ports on CMOS MPUs and MCUs.
- Display drivers and LED drivers.
- Serial-to-parallel data conversion.
- Buffering and storage of data in digital systems.
- General-purpose shift register applications.
Q & A
- What is the MC74HC595ADTR2G?
The MC74HC595ADTR2G is an 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs, produced by onsemi.
- What are the input voltage ranges for the MC74HC595ADTR2G?
The DC input voltage range is –0.5 to VCC + 0.5 volts.
- What is the maximum clock frequency for the MC74HC595ADTR2G?
The maximum clock frequency is up to 35 MHz, depending on the VCC voltage.
- How does the output enable function work?
The output enable is active-low, allowing data from the latches to be presented at the outputs when low, and forcing the outputs into a high-impedance state when high.
- What are the storage and junction temperature limits for the MC74HC595ADTR2G?
The storage temperature range is –65 to +150°C, and the junction temperature under bias is ±150°C.
- Is the MC74HC595ADTR2G compatible with TTL outputs?
Yes, the inputs are compatible with TTL outputs when using pull-up resistors.
- 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 up to 140 ns, depending on VCC.
- How does the asynchronous reset function work?
The asynchronous reset is active-low and resets the shift register portion of the device only, without affecting the 8-bit latch.
- What are the typical applications of the MC74HC595ADTR2G?
Typical applications include interface with SPI serial data ports, display drivers, LED drivers, serial-to-parallel data conversion, and general-purpose shift register applications.
- What package types are available for the MC74HC595ADTR2G?
The MC74HC595ADTR2G is available in TSSOP-16 packages.
