Overview
The 74AHCT595D-Q100118 is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs, manufactured by Nexperia (formerly part of NXP USA Inc.). This device is designed for high-speed CMOS applications and is pin-compatible with 74LS low power Schottky types. It features separate clocks for the shift and storage registers, enabling flexible data transfer and storage operations.
Key Specifications
| Type Number | VCC (V) | Logic Switching Levels | Output Drive Capability (mA) | tpd (ns) | fmax (MHz) | Number of Bits | Power Dissipation | Tamb (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|
| 74AHCT595D | 4.5 - 5.5 | TTL | ± 8 | 3.8 | 170 | 8 | Low | -40 to +125 | SO16 (SOT109-1) |
Key Features
- Supply voltage range from 4.5 V to 5.5 V
- CMOS low power consumption
- Schmitt-trigger action at all inputs
- Overvoltage tolerant inputs up to 5.5 V
- High noise immunity
- Separate clocks for shift and storage registers
- Serial input (DS) and serial output (Q7S) for cascading
- Asynchronous reset (MR) input
- 3-state outputs with output enable (OE) input
- ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V), CDM (ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V)
Applications
The 74AHCT595D is versatile and can be used in various applications across different industries, including:
- Automotive systems
- Industrial control systems
- Consumer electronics
- Mobile devices
- Wearables
- Remote control holding registers
- Serial-to-parallel data conversion
Q & A
- What is the primary function of the 74AHCT595D?
The 74AHCT595D is 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 the 74AHCT595D?
The supply voltage range is from 4.5 V to 5.5 V.
- What type of logic switching levels does the 74AHCT595D operate with?
The 74AHCT595D operates with TTL input levels.
- What is the maximum frequency of operation for the 74AHCT595D?
The maximum frequency of operation is 170 MHz.
- Does the 74AHCT595D have ESD protection?
- How does the asynchronous reset (MR) input function?
A LOW on the MR input resets the shift register to zero, independent of all clocks.
- What is the purpose of the output enable (OE) input?
The OE input controls the 3-state outputs; when OE is LOW, the outputs are active, and when OE is HIGH, the outputs are in a high-impedance state.
- Can the 74AHCT595D be used in mixed voltage environments?
- What is the operating temperature range for the 74AHCT595D?
The operating temperature range is from -40 °C to +125 °C.
- What package options are available for the 74AHCT595D?
The 74AHCT595D is available in the SO16 (SOT109-1) package.
