NXP Semiconductors MM908E624ACEWR2

Overview

MM908E624ACEWR2 from NXP Semiconductors (formerly Freescale) is an integrated automotive-grade triple high-side switch with embedded HC08 microcontroller and LIN physical layer, designed for relay-driven motor control. It delivers 16 KB flash, 512 B RAM, 10-bit ADC, three diagnostic-capable high-side outputs (HS1–HS3), and a 5.0 V LDO regulator - all in a single 54-pin SOICW package. It targets window lift, sunroof, and fan control in 12 V automotive systems.

For engineers reviewing the MM908E624ACEWR2 datasheet, MM908E624ACEWR2 pinout, MM908E624ACEWR2 application, or MM908E624ACEWR2 equivalent, key selection considerations include LIN bus compatibility, high-side R_DS(ON) at 125 °C (≤3.0 Ω for HS1/HS2; ≤14 Ω for HS3), integrated current-sense amplifier (±25 mV offset), watchdog configuration via external resistor (10–100 kΩ), and -40 °C to +85 °C operating range.

Technical Context

The MM908E624ACEWR2 integrates two die: an HC08-based MCU die (M68HC908EY16 core, 8 MHz bus, ESCI/SPI/ADC/timers) and a SmartMOS analog die providing power switching, LIN transceiver, voltage regulation, and diagnostics. The MCU controls high-side drivers via SPI commands with sub-10 μs activation delay, while the analog die handles real-time protection (overcurrent, overtemperature shutdown at 155 °C), wake-up detection on L1/L2 inputs, and LIN communication at up to 20 kbps.

Its LIN physical layer supports normal/slow/fast slew rates with defined propagation symmetry (DT1 ≤ -10.44 μs, DT2 ≤ 11 μs), recessive/dominant thresholds (V_{BUS_REC} = 0.475 V, V_{BUS_DOM} = 0.6 V), and bus wake-up deglitching (35–150 μs). The current-sense op-amp features rail-to-rail input (−0.1 to V_CC+0.1 V), 1 MHz GBW, and 70 dB CMRR - enabling accurate load monitoring without external signal conditioning.

Key Specifications

Pinout & Package

MM908E624ACEWR2 uses a 54-pin SOICW (Small Outline Integrated Circuit, Wide-body) package with 1.27 mm pitch, RoHS-compliant Pb-free finish (EW suffix), and moisture sensitivity level MSL3 per JEDEC J-STD-020C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side switch with MCU and LIN applications.

Compared with MC33883 and TLIN1029-Q1, MM908E624ACEWR2 uniquely integrates MCU, LIN PHY, regulator, and three diagnostic high-side drivers - reducing total component count by ≥4 ICs and eliminating interconnect routing between functions.

Availability

MM908E624ACEWR2 is available at Aetrix Electronics and suitable for automotive window lift, sunroof actuation, and HVAC fan control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MM908E624ACEWR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, and IoT applications, with deep expertise in embedded processing and automotive networking solutions.

The MM908E624ACEWR2 belongs to NXP's legacy SmartMOS family, engineered specifically for cost-optimized, function-integrated automotive body electronics - combining microcontroller intelligence with power switching and LIN connectivity in a single package.

FAQ

What is the maximum junction temperature specification for MM908E624ACEWR2?

The MM908E624ACEWR2 has an operating junction temperature range of −40 °C to 125 °C. Its analog die includes overtemperature shutdown at 155 °C (typical) and prewarning at 135 °C, both latching faults into SPI status registers. These thresholds are process-monitored but not production-tested per datasheet note 13.

Does MM908E624ACEWR2 support hardware PWM control independent of the MCU core?

Yes, MM908E624ACEWR2 supports direct hardware PWM control of HS1 and HS2 via the PWMIN pin. This allows pulse-width modulation without MCU intervention - critical for maintaining relay drive during firmware resets or brown-out conditions. HS3 is software-controlled only via SPI.

How does the current-sense amplifier in MM908E624ACEWR2 interface with external shunt resistors?

The MM908E624ACEWR2 current-sense amplifier uses dedicated +E and -E inputs to measure differential voltage across an external shunt. Its rail-to-rail input range (−0.1 to V_CC+0.1 V), ±25 mV offset, and 1 MHz bandwidth enable accurate low-side or high-side shunt monitoring without external gain stages - output appears on the OUT pin.

What LIN baud rates and timing tolerances does MM908E624ACEWR2 support?

MM908E624ACEWR2 supports standard automotive LIN baud rates up to 20 kbps. Its LIN physical layer guarantees propagation delay symmetry (DT1 ≤ −10.44 μs, DT2 ≤ 11 μs) and receiver thresholds (V_{BUS_REC} = 0.475 V, V_{BUS_DOM} = 0.6 V) per ISO 9141-2, ensuring interoperability with certified LIN master nodes.

Can MM908E624ACEWR2 operate in low-power Stop or Sleep modes while maintaining LIN bus wake-up capability?

Yes, MM908E624ACEWR2 supports Stop mode (60 μA typical) and Sleep mode (35 μA typical) with full LIN bus wake-up functionality. Bus activity triggers t_WAKE ≤ 20 μs response, followed by VDD ramp-up and MCU reset - enabling rapid reactivation from ultra-low-power states without external wake circuitry.