MM908E624ACEW

Overview

The MM908E624ACEW is an integrated single-package solution combining a high-performance HC08 microcontroller with a SMARTMOS analog control IC. It features three high-side outputs, a LIN physical layer interface, and diagnostic functions for automotive relay drivers. The MCU includes 16 KB of flash memory, 512 bytes of RAM, a 10-bit ADC, and two 16-bit timers. The analog die provides a low dropout voltage regulator, current sense operational amplifier, and window watchdog. Operating temperatures range from -40°C to 85°C (ACPEW) or -40°C to 125°C (AYPEW).

Feature Summary

• Integrated HC08 MCU core with 16 KB Flash and 512 B RAM.
• Three high-side switches with over-temperature shutdown and current limiting.
• Built-in LIN physical layer for single-wire serial communication.
• Current sense operational amplifier with rail-to-rail input/output.

Applications

• Automotive window lift motor control via relays.
• Sunroof and fan motor driver applications.
• High-current motor control systems requiring LIN bus integration.

Procurement Notes

Verify the specific suffix (e.g., ACPEW vs AYPEW) to confirm the operating temperature range (-40°C to 85°C or -40°C to 125°C). Confirm package type (54 SOICW) and ensure compatibility with existing PCB footprints. Check for RoHS compliance status as per manufacturer documentation.

Selection Notes

Select based on required thermal performance; choose AYPEW for extended temperature environments up to 125°C. Ensure supply voltage requirements (5.5V to 18V nominal) align with system design. Verify that the 16 I/O pins and specific peripheral interfaces (SPI, ESCI, ADC) meet application logic needs.

Part Context

This component belongs to the NXP 908E series, designed for body electronics. It integrates digital control and power switching in one package to reduce BOM count and PCB area. It replaces discrete MCU and driver solutions in automotive relay and motor control modules.

Replacement Considerations

Check form, fit, and function compatibility with existing designs. Verify pinout alignment if substituting similar parts. Note that ordering suffixes like R2 indicate tape and reel packaging, which may affect handling but not electrical function.

FAQ

What is the maximum supply voltage for normal operation?

The nominal operating voltage range is 5.5 V to 18 V. The device can withstand transient voltages up to 27 V under steady-state conditions.

How is the watchdog timer configured?

The watchdog period is configured using an external resistor connected to the WDCONF pin. The period accuracy depends on the resistor value and tolerance.

Does the device support wake-up from sleep mode?

Yes, it supports wake-up via LIN bus dominant signal detection or through dedicated wake-up inputs L1 and L2.