PCA8551BTT/AJ

Display Drivers Overview

The PCA8551BTT/AJ is a discontinued universal LCD segment driver manufactured by NXP USA Inc. It supports up to 36 segments, enabling configurations for 18 seven-segment digits, nine alphanumeric characters, or 144 graphic pixels. The device features an SPI interface and operates within a supply voltage range of 1.8V to 5.5V. It utilizes a 48-TSSOP package with a width of 6.10mm. The component is designed for low-power applications and includes internal bias voltage generation capabilities.

Display Drivers Feature Summary

• Supports flexible display configurations including seven-segment digits, alphanumeric characters, and graphic pixels
• Features a high-speed SPI bus interface for data communication
• Incorporates internal LCD bias voltage generation to reduce external component count
• Operates on a single power supply ranging from 1.8V to 5.5V

Display Drivers Applications

• Consumer electronics displays requiring low power consumption
• Industrial instrumentation panels
• Automotive instrument clusters
• Medical device user interfaces

Display Drivers Procurement Notes

This specific part number is officially discontinued and no longer in production. Verification of availability should focus on the direct substitute PCF8551BTT/AY. Buyers must confirm that the replacement part meets all original design specifications, including pin compatibility and electrical characteristics, before integration into existing systems.

Display Drivers Selection Notes

Designers should evaluate the PCF8551BTT/AY as the primary alternative due to its functional equivalence. Considerations include verifying the SPI interface timing requirements and ensuring the 48-TSSOP footprint matches the PCB layout. Review the updated datasheet for any changes in absolute maximum ratings or thermal performance compared to the legacy model.

Display Drivers Part Context

The PCA8551 belongs to NXP's family of universal LCD segment drivers, designed to replace complex discrete logic solutions. It integrates controller and driver functions into a single chip, simplifying system architecture. This series is commonly used in applications where space constraints and power efficiency are critical design factors.

Display Drivers Replacement Considerations

PCF8551BTT/AY is confirmed as a direct substitute. Verify pinout compatibility and software register settings to ensure seamless migration without hardware redesign.

Display Drivers FAQ

What is the interface type for the PCA8551?

The PCA8551 uses a 3MHz SPI bus interface for communication.

Can this driver support graphic displays?

Yes, it supports up to 144 segments/pixels, allowing for graphic display configurations.