Overview
The 74AHC595PW/AUJ is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs, manufactured by NXP USA Inc. This device is part of the 74AHC/AHCT family and is designed for use in a variety of digital logic applications. It features separate clocks for the shift and storage registers, enabling flexible data manipulation and transfer. The device includes a serial input (DS), a serial output (Q7S) for cascading, and an asynchronous reset (MR) input. The outputs are 3-state, allowing them to be set to a high-impedance OFF-state when the output enable (OE) input is HIGH.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2.0 | - | 5.5 | V |
| VI Input Voltage | 0 | - | 5.5 | V |
| VO Output Voltage | 0 | - | VCC | V |
| Tamb Ambient Temperature | -40 | - | 125 | °C |
| tpd Propagation Delay | - | 4.0 | - | ns |
| fmax Maximum Frequency | - | 170 | - | MHz |
| Number of Bits | - | 8 | - | - |
| Output Drive Capability | - | ±8 | - | mA |
| Package Type | - | TSSOP16 | - | - |
Key Features
- 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs.
- Separate clocks for shift and storage registers.
- Serial input (DS) and serial output (Q7S) for cascading.
- Asynchronous reset (MR) input.
- Output enable (OE) input to control 3-state outputs.
- Wide supply voltage range from 2.0 V to 5.5 V.
- CMOS low power dissipation.
- Overvoltage tolerant inputs up to 5.5 V.
- High noise immunity and balanced propagation delays.
- All inputs have Schmitt-trigger action.
- ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V.
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level A.
Applications
- Serial-to-parallel data conversion.
- Remote control holding register.
- Buffering and storage of data in digital systems.
- Cascading shift registers for larger data storage.
- Mixed voltage environments due to overvoltage tolerant inputs.
Q & A
- What is the primary function of the 74AHC595PW/AUJ?
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 supply voltage range for this device?
The supply voltage range is from 2.0 V to 5.5 V.
- How many bits does the shift register have?
The shift register has 8 bits.
- What is the maximum frequency of operation?
The maximum frequency of operation is up to 170 MHz.
- Does the device have ESD protection?
- What is the package type of the 74AHC595PW/AUJ?
The package type is TSSOP16.
- Can the device operate in mixed voltage environments?
- How does the output enable (OE) input function?
The output enable (OE) input controls the 3-state outputs; when OE is HIGH, the outputs are in a high-impedance OFF-state.
- What is the propagation delay of the device?
The propagation delay is typically 4.0 ns.
- Does the device have Schmitt-trigger action on its inputs?
- What are the operating temperature ranges for the device?
The device operates from -40 °C to +125 °C.
