PCF8551BTT/AJ

Display Drivers Overview

The PCF8551BTT/AJ is a universal LCD segment driver manufactured by NXP Semiconductors, housed in a 48-TSSOP surface-mount package. It supports a supply voltage range of 1.8V to 5.5V for both V_LCD and V_DD, with a typical operating current of 1.2 µA. The device features a 3MHz SPI interface and can drive up to 144 segments, supporting configurations such as 18 seven-segment digits or nine 14-character alphanumeric displays. Operating temperatures range from -40°C to 85°C.

Display Drivers Feature Summary

• Supports multiple display configurations including static, multiplexed backplanes, and various bias voltages.
• Integrates internal LCD bias voltage generation with buffering capabilities.
• Features an automatic incrementing load mechanism for display data and instructions.
• Offers flexible clock signal options via internal generation or external supply.

Display Drivers Applications

• Consumer electronics requiring low-power LCD interfaces
• Industrial control panels with alphanumeric displays
• Portable devices utilizing segmented LCD screens

Display Drivers Procurement Notes

This component is officially discontinued and no longer in production. Verification of availability should focus on direct substitutes like the PCF8551BTT/AY. Ensure that any replacement part maintains form, fit, and function compatibility with the original design requirements before procurement.

Display Drivers Selection Notes

Select this driver for applications requiring high integration of LCD control and driving functions. The SPI interface simplifies microcontroller connections compared to I2C alternatives. Consider the power consumption and voltage range when designing the system's power management architecture to ensure stable operation across the specified temperature range.

Display Drivers Part Context

Part of the PCF8551 family of universal LCD segment drivers designed for low-power applications. The B suffix indicates the SPI interface variant, distinguishing it from the A suffix which uses an I2C bus. This series is engineered for embedded systems needing efficient display management with minimal external components.

Display Drivers Replacement Considerations

PCF8551BTT/AY is listed as a direct substitute. Verify pinout and electrical specifications match the original design constraints.

Display Drivers FAQ

What is the maximum number of segments this driver can support?

The PCF8551BTT/AJ can drive up to 144 segments or pixels, configurable for various display types.

Does the device generate its own clock signal?

Yes, the PCF8551BTT/AJ supports both internally generated clock signals and externally supplied clock inputs.