Overview
The 74HCT595D/AUJ is an 8-bit serial-in/serial or parallel-out shift register produced by NXP USA Inc. This component is part of the 74HCT family, which operates at TTL logic levels. It features a storage register and 3-state outputs, making it versatile for various digital logic applications. The device includes separate clocks for the shift and storage registers, allowing for precise control over data transfer. It also includes an asynchronous reset input (MR) and an output enable input (OE) to manage the output states effectively.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC (Supply Voltage) | 4.5 - 5.5 | V |
| Logic Switching Levels | TTL | |
| Output Drive Capability | ± 6 | mA |
| tpd (Propagation Delay) | 25 | ns |
| fmax (Maximum Frequency) | 57 | MHz |
| Number of Bits | 8 | |
| Operating Temperature Range | -40 to +125 | °C |
| Package Type | SO16 (SOT109-1) |
Key Features
- 8-bit serial input and 8-bit serial or parallel output
- Storage register with 3-state outputs
- Shift register with direct clear (asynchronous reset input MR)
- Separate clocks for shift and storage registers (SHCP and STCP)
- Output enable input (OE) to control output states
- High-speed operation with a typical shift out frequency of 100 MHz
- ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2) exceeds 2000 V, CDM (ANSI/ESDA/JEDEC JS-002 class C3) exceeds 1000 V
- Totally lead-free and fully RoHS compliant
Applications
- General purpose logic
- Serial to parallel data conversion
- Capture and hold data for extended periods of time
- Control of multiple peripheral lines from a microcontroller
- Computer peripherals
- Appliances
- Industrial control systems
Q & A
- What is the primary function of the 74HCT595D/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 are the logic switching levels for the 74HCT595D/AUJ? The logic switching levels are TTL (Transistor-Transistor Logic).
- What is the maximum frequency of operation for the 74HCT595D/AUJ? The maximum frequency of operation is 57 MHz.
- How does the asynchronous reset input (MR) function? A LOW on the MR input will reset the shift register.
- What is the purpose of the output enable input (OE)? The OE input controls the output states; when OE is LOW, the outputs are active, and when OE is HIGH, the outputs are in a high-impedance OFF-state.
- What is the operating temperature range for the 74HCT595D/AUJ? The operating temperature range is from -40°C to +125°C.
- Is the 74HCT595D/AUJ RoHS compliant? Yes, the device is totally lead-free and fully RoHS compliant.
- What type of ESD protection does the 74HCT595D/AUJ have? The device has ESD protection exceeding 2000 V for HBM and 1000 V for CDM.
- What are some common applications of the 74HCT595D/AUJ? Common applications include general purpose logic, serial to parallel data conversion, and control of multiple peripheral lines from a microcontroller.
- What package type is the 74HCT595D/AUJ available in? The device is available in the SO16 (SOT109-1) package type.
