PCF8545BTT/AJ

Display Drivers Overview

The PCF8545BTT/AJ is a Real Time Clock and LCD Segment Driver manufactured by NXP Semiconductors. It integrates an SPI interface for communication with host microcontrollers. The device supports multiplex rates up to 1:8 and drives LCD segments in a TSSOP56 package. It functions as a combined timing and display control solution, designed for applications requiring synchronized timekeeping and segment-based visual output.

Display Drivers Feature Summary

• Integrates real-time clock functionality with LCD segment driving capabilities
• Supports SPI bus interface for data transmission
• Capable of driving displays with multiplex rates up to 1:8
• Housed in a TSSOP56 surface-mount package

Display Drivers Applications

• Embedded systems requiring integrated timekeeping and display control
• Industrial equipment with segmented LCD interfaces
• Consumer electronics utilizing SPI-driven displays

Display Drivers Procurement Notes

Verify component status before design finalization, as the PCF8545BTT/AJ is listed as obsolete or end-of-life by major distributors. Confirm availability through authorized channels and assess long-term supply stability. Ensure that any replacement strategies account for form, fit, and function compatibility with existing system architectures.

Display Drivers Selection Notes

Select this component when a single-chip solution for both RTC and LCD driving is required. Verify that the target application utilizes an SPI interface and can accommodate the specific multiplexing requirements supported by the device. Consider the TSSOP56 package constraints during PCB layout planning.

Display Drivers Part Context

This part belongs to the PCF8545 series of LCD drivers with integrated real-time clocks. It is distinct from similar models like the PCF8546 or PCF8551, which may offer different interface types such as I2C or varying segment counts. The suffix AJ indicates specific packaging or manufacturing details defined by NXP.

Display Drivers Replacement Considerations

Direct substitutes include the PCF8545BTT/AY. Verify pinout and electrical specifications against the original datasheet to ensure seamless integration into existing designs without hardware modifications.