Overview
The 74AHCT595PW,118 is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs, manufactured by Nexperia USA Inc. This device is part of the 74AHCT series, which operates with TTL-compatible input levels. It features separate clocks for both the shift and storage registers, enabling flexible data transfer and storage. The device includes a serial input (DS) and a serial output (Q7S) for cascading, as well as an asynchronous reset (MR) input. The output enable input (OE) allows the outputs to be set to a high-impedance OFF-state when OE is HIGH. This component is widely used in various electronic designs due to its versatility and robust performance characteristics.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Type Number | 74AHCT595PW | - |
| Package | TSSOP16 (SOT403-1) | - |
| Supply Voltage (VCC) | 4.5 - 5.5 | V |
| Logic Switching Levels | TTL | - |
| Output Drive Capability | ± 8 | mA |
| Propagation Delay (tpd) | 3.8 | ns |
| Maximum Frequency (fmax) | 170 | MHz |
| Number of Bits | 8 | - |
| Ambient Temperature (Tamb) | -40 to +125 | °C |
| Thermal Resistance (Rth(j-a)) | 122 | K/W |
Key Features
- 8-bit Serial-in/Serial or Parallel-out Shift Register: Allows for both serial and parallel data output.
- Storage Register and 3-state Outputs: Data can be stored and outputs can be set to a high-impedance state.
- Separate Clocks: The shift and storage registers have separate clocks (SHCP and STCP), enabling one clock pulse ahead of the other if connected together.
- Asynchronous Reset (MR): Resets the shift register when MR is LOW.
- Overvoltage Tolerant Inputs: Inputs are tolerant up to 5.5 V, making it suitable for mixed voltage environments.
- High Noise Immunity: Features Schmitt-trigger action on all inputs.
- Low Power Dissipation: CMOS low power dissipation characteristics.
- ESD Protection: Exceeds 2000 V HBM and 1000 V CDM.
- Multiple Package Options: Available in various packages including TSSOP16, SO16, and DHVQFN16.
Applications
The 74AHCT595PW,118 is versatile and can be used in a variety of applications across different industries, including:
- Automotive Systems: For data storage and transfer in automotive control units.
- Industrial Automation: In control systems and data processing units.
- Consumer Electronics: In devices requiring serial-to-parallel data conversion.
- Computing and Networking: For data buffering and storage in computing and networking equipment.
- Remote Control Systems: As a holding register in remote control applications.
Q & A
- What is the primary function of the 74AHCT595PW,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 are the logic switching levels of the 74AHCT595PW,118?
The device operates with TTL-compatible input levels.
- What is the supply voltage range for the 74AHCT595PW,118?
The supply voltage range is from 4.5 V to 5.5 V.
- How does the asynchronous reset (MR) input work?
A LOW on the MR input resets the shift register.
- What is the maximum frequency of operation for the 74AHCT595PW,118?
The maximum frequency of operation is 170 MHz.
- What are the thermal resistance characteristics of the TSSOP16 package?
The thermal resistance (Rth(j-a)) is 122 K/W.
- Is the 74AHCT595PW,118 ESD protected?
Yes, it exceeds 2000 V HBM and 1000 V CDM.
- What are the output drive capabilities of the 74AHCT595PW,118?
The output drive capability is ± 8 mA.
- Can the 74AHCT595PW,118 be used in mixed voltage environments?
Yes, the inputs are overvoltage tolerant up to 5.5 V.
- What is the ambient temperature range for the 74AHCT595PW,118?
The ambient temperature range is from -40 °C to +125 °C.
