Overview
The HEF4894BT is a 12-stage serial shift-and-store register LED driver produced by Nexperia USA Inc. This integrated circuit is designed to handle serial data input and convert it into parallel output, making it suitable for various LED driver applications. The device features a storage latch associated with each stage, allowing data to be strobed from the serial input to the parallel LED driver outputs. It operates over a wide supply voltage range of 3.0 V to 15.0 V, making it versatile for different power requirements.
Key Specifications
| Parameter | Value |
|---|---|
| Type Number | HEF4894BT |
| Package | SO20 (SOT163-1) |
| Number of Bits | 12 |
| Supply Voltage Range (VDD) | 3.0 V to 15.0 V |
| Logic Switching Levels | CMOS |
| Output Drive Capability | -20 mA |
| Propagation Delay (tpd) | 45 ns |
| Maximum Clock Frequency (fmax) | 28 MHz |
| Operating Temperature Range | -40°C to 125°C |
| Automotive Qualification Standard | AEC-Q100 |
Key Features
- 12-stage serial shift register with storage latch for each stage.
- Data is shifted on positive-going clock transitions and transferred to the storage register when the strobe input is HIGH.
- Two serial outputs (QS1 and QS2) for cascading multiple HEF4894B devices.
- Output enable (OE) input allows control over output visibility.
- Wide supply voltage range from 3.0 V to 15.0 V.
- CMOS logic switching levels for compatibility with a variety of systems.
- High-speed operation with a maximum clock frequency of 28 MHz.
- AEC-Q100 qualified for automotive applications.
Applications
The HEF4894BT is suitable for a wide range of applications, including:
- LED driver systems: Ideal for driving LEDs in various configurations.
- Automotive systems: AEC-Q100 qualification makes it reliable for automotive use.
- Industrial control systems: Can be used in industrial automation and control panels.
- Consumer electronics: Suitable for use in various consumer electronic devices.
- Display systems: Can be used in display drivers and other display-related applications.
Q & A
- What is the primary function of the HEF4894BT?
The HEF4894BT is a 12-stage serial shift-and-store register LED driver, converting serial input data to parallel output.
- What is the supply voltage range for the HEF4894BT?
The supply voltage range is from 3.0 V to 15.0 V.
- How does the data transfer work in the HEF4894BT?
Data is shifted on positive-going clock transitions and transferred to the storage register when the strobe input is HIGH.
- What are the serial output options for cascading?
The device has two serial outputs (QS1 and QS2) for cascading multiple HEF4894B devices.
- What is the maximum clock frequency for the HEF4894BT?
The maximum clock frequency is 28 MHz.
- Is the HEF4894BT suitable for automotive applications?
Yes, it is AEC-Q100 qualified for automotive use.
- What is the operating temperature range for the HEF4894BT?
The operating temperature range is from -40°C to 125°C.
- How many bits does the HEF4894BT handle?
The device handles 12 bits.
- What type of logic switching levels does the HEF4894BT use?
The device uses CMOS logic switching levels.
- What package type is the HEF4894BT available in?
The device is available in the SO20 (SOT163-1) package.
