Overview
The 74HCT595D/S400118, produced by NXP 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 74HCT family, which operates at TTL logic levels. It is designed for high-speed CMOS applications and features separate clocks for both the shift and storage registers. The device includes a serial input (DS), a serial output (Q7S) for cascading, and an asynchronous reset (MR) input. The output enable (OE) input allows the outputs to be set to a high-impedance OFF-state when HIGH, without affecting the state of the registers.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Type Number | 74HCT595D | - |
| VCC Supply Voltage | 4.5 - 5.5 | V |
| Logic Switching Levels | TTL | - |
| Output Drive Capability | ± 6 | mA |
| Propagation Delay (tpd) | 25 | ns |
| Maximum Frequency (fmax) | 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 (MR input).
- 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) and CDM (ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V).
- Multiple package options, including SO16 (SOT109-1).
- Operation specified from -40 °C to +85 °C and from -40 °C to +125 °C.
- Serial-to-parallel data conversion capability.
- Remote control holding register functionality.
Applications
- General-purpose logic.
- Serial to parallel data conversion.
- Capture and hold data for extended periods.
- Control of multiple peripheral lines from a microcontroller.
- Computer peripherals.
- Appliances.
- Industrial control systems.
Q & A
- What is the primary function of the 74HCT595D/S400118? 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 this device? The device operates at TTL logic levels.
- What is the maximum frequency of operation for the 74HCT595D/S400118? The maximum frequency is typically 57 MHz.
- How many bits does the shift register have? The shift register has 8 bits.
- What is the operating temperature range for this device? The operating temperature range is from -40 °C to +125 °C.
- What type of package is the 74HCT595D/S400118 available in? It is available in an SO16 (SOT109-1) package.
- Does the device have ESD protection? Yes, it has ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V) and CDM (ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V).
- What is the purpose of the MR input? The MR input is used for asynchronous reset of the shift register.
- How does the output enable (OE) input function? The OE input sets the outputs to a high-impedance OFF-state when HIGH, without affecting the state of the registers.
- What are some common applications of the 74HCT595D/S400118? Common applications include general-purpose logic, serial to parallel data conversion, capture and hold data, control of multiple peripheral lines, computer peripherals, appliances, and industrial control systems.
