Overview
The SN74AHC594DR is an 8-bit serial-in, parallel-out shift register with an integrated 8-bit D-type storage register, manufactured by Texas Instruments. This device is part of the AHC (Advanced High-Speed CMOS) logic family, known for its high speed and low power consumption. The SN74AHC594DR operates within a voltage range of 2V to 5.5V, making it versatile for various applications. It features separate clocks for the shift and storage registers, allowing for independent control over data shifting and storage. Additionally, it includes direct overriding clear inputs for both the shift and storage registers, enhancing its functionality in complex digital circuits.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage Range | 2 | 5.5 | V | |
| Operating Free-Air Temperature | -40 | 125 | °C | |
| Input Voltage Range | -0.5 | 7 | V | |
| Output Voltage Range | -0.5 | VCC + 0.5 | V | |
| Continuous Output Current | ±25 | mA | ||
| High-Level Output Current (VCC = 5V) | -8 | mA | ||
| Low-Level Output Current (VCC = 5V) | 8 | mA | ||
| Pulse Duration RCLK or SRCLK High or Low | 5 | 5 | ns | |
| Setup Time SER before SRCLK↑ (VCC = 5V) | 3 | 3 | ns |
Key Features
- 8-bit serial-in, parallel-out shift register with an integrated 8-bit D-type storage register.
- Separate clocks for shift and storage registers (SRCLK and RCLK), allowing for independent control.
- Direct overriding clear inputs for both shift and storage registers (SRCLR and RCLR).
- Serial output (QH′) for cascading purposes.
- Operating voltage range from 2V to 5.5V.
- Low power consumption.
- ESD protection exceeds JESD 22 – 2000V human-body model and 1000V charged-device model.
- Inputs tolerant up to 5.5V, allowing for down translation.
- Slow edges for reduced noise.
Applications
- Network Switches
- Power Infrastructures
- PCs and Notebooks
- LED Displays
- Servers
Q & A
- What is the operating voltage range of the SN74AHC594DR?
The operating voltage range is from 2V to 5.5V.
- What type of registers does the SN74AHC594DR contain?
The device contains an 8-bit serial-in, parallel-out shift register and an 8-bit D-type storage register.
- Does the SN74AHC594DR have separate clocks for the shift and storage registers?
- What is the purpose of the QH′ output?
The QH′ output is provided for cascading purposes.
- What is the maximum continuous output current of the SN74AHC594DR?
The maximum continuous output current is ±25 mA.
- Does the SN74AHC594DR have ESD protection?
- What are some common applications of the SN74AHC594DR?
Common applications include network switches, power infrastructures, PCs and notebooks, LED displays, and servers.
- What is the maximum operating free-air temperature for the SN74AHC594DR?
The maximum operating free-air temperature is 125°C.
- Does the SN74AHC594DR support down translation of input voltages?
- How does the SN74AHC594DR reduce noise?
The device features slow edges to reduce noise.
