Overview
The 74HCT595BQ 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 integrated circuit is part of the 74HCT family and is designed for a wide range of applications, including automotive, industrial, power, computing, consumer, mobile, and wearables. The device features separate clocks for the shift and storage registers, enabling flexible data transfer and output control.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC supply voltage | 4.5 | 5.0 | 5.5 | V | |
| VI input voltage | 0 - VCC | V | |||
| VO output voltage | 0 - VCC | V | |||
| Tamb ambient temperature | -40 | +25 | +125 | °C | |
| VIH HIGH-level input voltage | VCC = 4.5 V to 5.5 V | 2.0 | 1.6 | V | |
| VIL LOW-level input voltage | VCC = 4.5 V to 5.5 V | 1.2 | 0.8 | V | |
| ICC supply current | VI = VCC or GND; IO = 0 A; VCC = 5.5 V | 160 | μA | ||
| CI input capacitance | 3.5 | pF | |||
| Package | 16-DHVQFN (2.5x3.5) | ||||
| Output Type | Tri-State | ||||
| Number of Bits per Element | 8 |
Key Features
- 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs.
- Separate clocks for the shift and storage registers.
- Serial input (DS) and serial output (Q7S) for cascading.
- Asynchronous reset MR input; a LOW on MR resets the shift register.
- Data shifted on LOW-to-HIGH transitions of the SHCP input.
- Data transferred to the storage register on a LOW-to-HIGH transition of the STCP input.
- Output enable input (OE) controls the output state; HIGH on OE causes outputs to assume a high-impedance OFF-state.
- Inputs include clamp diodes for interfacing with voltages in excess of VCC.
- Operating temperature range: -40°C to +125°C.
Applications
The 74HCT595BQ is versatile and can be used in a variety of applications across different industries, including:
- Automotive systems
- Industrial control systems
- Power management systems
- Computing and data storage systems
- Consumer electronics
- Mobile devices
- Wearables and IoT devices
Q & A
- What is the primary function of the 74HCT595BQ?
The 74HCT595BQ is an 8-bit serial-in/serial or parallel-out shift register with a storage register and 3-state outputs.
- What are the operating voltage ranges for the 74HCT595BQ?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the package type of the 74HCT595BQ?
The package type is 16-DHVQFN (2.5x3.5 mm).
- How does the asynchronous reset MR input work?
A LOW on the MR input resets the shift register.
- What is the purpose of the output enable input (OE)?
The OE input controls the output state; a HIGH on OE causes the outputs to assume a high-impedance OFF-state.
- Can the 74HCT595BQ be cascaded?
- What is the temperature range for the 74HCT595BQ?
The operating temperature range is from -40°C to +125°C.
- What are the key clock inputs for the 74HCT595BQ?
The key clock inputs are SHCP for the shift register and STCP for the storage register.
- How do the inputs handle voltages in excess of VCC?
The inputs include clamp diodes to handle voltages in excess of VCC.
- What industries can the 74HCT595BQ be used in?
The 74HCT595BQ can be used in automotive, industrial, power, computing, consumer, mobile, and wearable applications.
