PCA8551ATT/AJ

Display Drivers Overview

The PCA8551ATT/AJ is a discontinued LCD segment driver manufactured by NXP Semiconductors. It supports up to 36 segments and 4 backplanes, enabling the direct driving of displays with up to 144 elements. The device operates within a supply voltage range of 1.8V to 5.5V and features an I2C interface for communication. Designed for low power consumption, it includes a standby mode with microamp-level current draw. The component is housed in a TSSOP package and is rated for industrial temperature ranges.

Display Drivers Feature Summary

• Supports complex LCD configurations with up to 36 segments and 4 backplanes
• Utilizes I2C serial interface for simplified system integration
• Operates across a wide voltage range from 1.8V to 5.5V
• Features ultra-low power consumption suitable for battery-powered applications

Display Drivers Applications

• Automotive instrument clusters and display indicators
• Portable battery-operated measurement devices
• Industrial control panel displays
• Consumer electronics with segmented LCD interfaces

Display Drivers Procurement Notes

This specific part number is officially listed as obsolete and no longer manufactured by NXP. Verification of availability should focus on finding direct replacement components or checking for surplus stock from authorized distributors. Designers must confirm that any substitute component maintains electrical compatibility and pin configuration before implementation.

Display Drivers Selection Notes

Engineers selecting this component should note its discontinuation status. The primary selection criteria involve verifying the required segment count and backplane configuration against the device's 36x4 limit. Compatibility with the host microcontroller's I2C bus speed and voltage levels must be confirmed. Consideration should be given to the transition to newer variants or alternative drivers if long-term supply stability is required.

Display Drivers Part Context

The PCA8551 belongs to NXP's family of LCD segment drivers designed to reduce MCU load by handling high-voltage multiplexing internally. This specific variant utilizes the I2C interface, distinguishing it from SPI-based counterparts like the PCA8551B. It serves as a bridge between low-voltage digital logic and higher-voltage LCD segments, simplifying board layout and reducing component count in display subsystems.

Display Drivers Replacement Considerations

PCF8551BTT/AY is identified as a direct replacement option available from NXP USA Inc.