MC68LC302AF25CT

Microprocessors Overview

The MC68LC302AF25CT is a low-cost integrated multiprotocol processor based on the M68000 family. It features a static 68000 core operating at 25 MHz with a 16-bit data bus width. The device integrates two full-duplex serial communication controllers (SCCs), three timers including a watchdog, and an interrupt controller. System resources include 1152 bytes of dual-port RAM and four programmable chip-select lines. It utilizes a 100-pin Thin Quad Flat Pack (TQFP) package.

Microprocessors Feature Summary

• Integrates a static 68000 core for low-power operation in portable applications
• Includes two independent full-duplex serial communication controllers supporting HDLC/SDLC, UART, and BISYNC protocols
• Features new low-power standby modes with wake-up capability via periodic interrupt timer or external pins
• Provides glueless interface to memory devices such as EPROM, SRAM, Flash, and EEPROM

Microprocessors Applications

• Low power and handheld portable systems
• Space-critical applications requiring height-restricted packaging like PCMCIA cards
• Multiprotocol communication interfaces replacing MC68302 where only two serial channels are needed
• Intelligent DMA-driven peripheral chips using CPU disabled slave mode

Microprocessors Procurement Notes

Verify the specific suffix 'AF' against official NXP documentation to confirm voltage and temperature ratings, as standard listings often specify PU suffixes for 5V or 3.3V variants. Confirm availability status as legacy components may be discontinued. Ensure the 100-pin TQFP package matches the target board footprint requirements.

Microprocessors Selection Notes

Select this component when a static 68000 core is required for reduced power consumption compared to dynamic alternatives. Choose the MC68LC302 over the MC68302 if only two serial channels are necessary and pin count reduction is desired. Consider the 100-pin TQFP package for space-constrained designs. Verify that the removal of the third SCC and external bus arbitration pins aligns with system architecture needs.

Microprocessors Part Context

The MC68LC302 serves as a cost-effective variant within the M683xx family, derived from the MC68302. It retains the core functionality while removing the third serial channel to reduce pin count and package size. This makes it suitable for applications prioritizing power efficiency and physical footprint over maximum peripheral flexibility.

Microprocessors Replacement Considerations

The MC68302 is the primary predecessor but requires more pins and lacks the static core optimization. Check for updated MCU families from NXP/Freescale for modern replacements, though direct functional equivalents may require significant design changes due to architectural differences.