SST89E54RD2A-40-C-TQJE

Microcontrollers Overview

The SST89E54RD2A-40-C-TQJE is an 8-bit microcontroller from the FlashFlex family, utilizing SuperFlash CMOS technology. It features a 16 KByte primary program memory block and an 8 KByte secondary block, alongside 1 KByte of internal RAM. The device operates at frequencies up to 40 MHz at 5V within the commercial temperature range of 0°C to +70°C. It supports external addressing for up to 64 KByte of program and data memory.

Microcontrollers Feature Summary

• Dual Block SuperFlash EEPROM with individual security locks and concurrent in-application programming capabilities
• Three high-current drive ports capable of 16 mA each
• Full-duplex enhanced UART with framing error detection and automatic address recognition
• Programmable Watchdog Timer and Counter Array (PCA) with four compare/capture modules

Microcontrollers Applications

• In-system programming via standard 87C5x OTP EPROM programmers
• In-application programming operations as a master to external hosts
• Source code storage applications acting as a slave to external hosts

Microcontrollers Procurement Notes

Verify that the specific ordering suffix corresponds to the 44-lead TQJE package variant. Confirm the operational speed grade matches the required 40 MHz frequency specification. Ensure the temperature rating aligns with the commercial range requirements. Check for RoHS compliance status on lead-free devices. Validate that the component meets all electrical parameters defined in the official datasheet.

Microcontrollers Selection Notes

Select this component when dual independent program memory blocks are necessary for complex application architectures. Consider the device for designs requiring high-current I/O drive capabilities without external buffers. Evaluate its suitability for systems needing flexible memory overlay options during interrupt handling. Assess compatibility with existing 8051 development toolsets and software environments.

Microcontrollers Part Context

This part belongs to the SST89E5xRD2A/RDA series of 8-bit microcontrollers manufactured using proprietary SuperFlash process technology. The FlashFlex family offers pin-for-pin compatibility with standard 8051 devices while providing enhanced memory flexibility through split-gate cell design.

Microcontrollers Replacement Considerations

Consult Microchip Sales for current microcontroller design options as this product is not recommended for new designs.