Overview
The 74AHC595PW,118, produced by Nexperia USA Inc., is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs. This device is part of the 74AHC/AHCT series, known for its high-speed CMOS logic and compatibility with a wide range of voltage levels. The 74AHC595PW is designed to operate within a voltage range of 2.0 to 5.5 volts, making it versatile for various electronic designs.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC (Supply Voltage) | 2.0 | 5.0 | 5.5 | V |
| VIL (LOW-level Input Voltage) | - | - | 0.5 | V |
| VIH (HIGH-level Input Voltage) | 3.85 | - | - | V |
| IO (Output Current) | -25 | - | 25 | mA |
| tpd (Propagation Delay) | - | - | 4.0 | ns |
| fmax (Maximum Frequency) | - | - | 170 | MHz |
| Tamb (Ambient Temperature) | -40 | - | 125 | °C |
| Package | - | - | TSSOP16 (SOT403-1) | - |
Key Features
- 8-bit Serial-in/Serial or Parallel-out Shift Register: Allows for both serial and parallel data output, making it versatile for various applications.
- Storage Register and 3-state Outputs: Data in the storage register appears at the output whenever the output enable input (OE) is LOW, and outputs assume a high-impedance OFF-state when OE is HIGH.
- Separate Clocks for Shift and Storage Registers: Data is shifted on the LOW-to-HIGH transitions of the SHCP input, and transferred to the storage register on a LOW-to-HIGH transition of the STCP input.
- Asynchronous Reset (MR): A LOW on MR resets the shift register.
- Cascading Capability: Features a serial input (DS) and a serial output (Q7S) to enable cascading of multiple devices.
- TTL Compatible Inputs (74AHCT595): The 74AHCT595 version has TTL compatible inputs, enhancing compatibility with TTL logic systems.
Applications
The 74AHC595PW,118 is widely used in various electronic designs across different industries, including:
- Automotive Systems: For control and data transfer in automotive electronics.
- Industrial Automation: In control systems, data logging, and other industrial applications.
- Consumer Electronics: In devices such as displays, LED drivers, and other consumer products.
- Computing and Networking: For data transfer and storage in computing and networking equipment.
- Mobile and Wearable Devices: Due to its low power consumption and high-speed operation, it is suitable for mobile and wearable devices.
Q & A
- What is the primary function of the 74AHC595PW,118?
The primary function is to act as an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs.
- What is the voltage range for the 74AHC595PW,118?
The device operates within a voltage range of 2.0 to 5.5 volts.
- How does the asynchronous reset (MR) work?
A LOW on the MR input resets the shift register.
- What is the purpose of the separate clocks for the shift and storage registers?
Data is shifted on the LOW-to-HIGH transitions of the SHCP input, and transferred to the storage register on a LOW-to-HIGH transition of the STCP input.
- Can the 74AHC595PW,118 be cascaded with other devices?
Yes, it features a serial input (DS) and a serial output (Q7S) to enable cascading.
- What is the maximum frequency of operation for the 74AHC595PW,118?
The maximum frequency is 170 MHz.
- What is the ambient temperature range for the 74AHC595PW,118?
The device operates within an ambient temperature range of -40°C to 125°C.
- What package type is the 74AHC595PW,118 available in?
The device is available in a TSSOP16 (SOT403-1) package.
- Does the 74AHCT595 version have any special input compatibility?
Yes, the 74AHCT595 version has TTL compatible inputs.
- How does the output enable (OE) input affect the outputs?
A LOW on the OE input causes the outputs to be active, while a HIGH on OE causes the outputs to assume a high-impedance OFF-state.
