Overview
The MC74HC595AFR1, 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 configuration. 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 |
| Maximum Clock Frequency (fmax) at VCC = 2.0V | 6.0 | MHz |
| Maximum Clock Frequency (fmax) at VCC = 4.5V | 15 | MHz |
| Maximum Propagation Delay, Shift Clock to SQH | 140 - 210 | ns |
| Storage Temperature (TSTG) | –65 to +150 | °C |
| Lead Temperature, 1 mm from Case for 10 Seconds (TL) | 260 | °C |
Key Features
- 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs.
- 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 pullup resistors, compatible with TTL outputs.
- Direct interface with SPI serial data port on CMOS MPUs and MCUs.
- Available in SOIC-16, TSSOP-16, and QFN16 packages.
Applications
The MC74HC595AFR1 is suitable for a variety of digital systems, including:
- Microcontroller and microprocessor interfaces.
- Display drivers and LED drivers.
- Data transmission and reception systems.
- Automotive and industrial control systems.
- Any application requiring serial-to-parallel data conversion.
Q & A
- What is the primary function of the MC74HC595AFR1? The primary function is to act as an 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs.
- What types of clock inputs does the device have? The device has independent clock inputs for the shift register and the latch.
- How does the reset function work? The reset is asynchronous and active-low, resetting only the shift register portion of the device.
- What is the maximum clock frequency at VCC = 4.5V? The maximum clock frequency at VCC = 4.5V is 15 MHz.
- What are the output drive capabilities of the device? The device can drive up to 15 LSTTL loads.
- Is the device compatible with TTL outputs? Yes, with pullup resistors, the inputs are compatible with TTL outputs.
- What are the available package types for the MC74HC595AFR1? The device is available in SOIC-16, TSSOP-16, and QFN16 packages.
- What is the storage temperature range for the device? The storage temperature range is –65 to +150°C.
- How does the output enable function work? The output enable is active-low, allowing the data from the latches to be presented at the outputs when low, and forcing the outputs into a high-impedance state when high.
- What is the thermal resistance of the device? The thermal resistance (JA) varies depending on the package type and is specified in the datasheet.
