NXP Semiconductors MM912F634CV2AP

Overview

MM912F634CV2AP from NXP Semiconductors (formerly Freescale) is an integrated S12-based relay driver with LIN physical layer, combining an HCS12 microcontroller and SMARTMOS analog control IC in a single 48-pin LQFP package. It delivers 16 MHz bus frequency, 32 kB Flash, 2 kB RAM, two protected high-side outputs, two protected low-side outputs, and LIN 2.1 compliance for automotive body electronics control.

For engineers reviewing the MM912F634CV2AP datasheet, MM912F634CV2AP pinout, MM912F634CV2AP application, or MM912F634CV2AP equivalent, key selection criteria include its dual high-/low-side driver capability, integrated current sense module, wake-up inputs (L0–L3), and automotive-grade thermal protection - all validated for under-hood relay control and LIN node applications.

Technical Context

The MM912F634CV2AP implements a die-to-die interface between its MCU die (HCS12 core) and analog die, enabling transparent memory-mapped access to analog peripherals including voltage regulators, high-voltage inputs, and protected drivers. Its architecture supports cyclic sense wake-up modes and forced wake-up via six high-voltage inputs (L0–L3 active in Option 2).

It integrates cascaded voltage regulators (VDD = 2.5 V, VDDX = 5.0 V), a LIN 2.1 transceiver with integrated SCI, and dedicated analog modules: 10-bit 15-channel ADC with selectable input dividers (0–5 V / 0–18 V), current sense differential inputs (ISENSEH/ISENSEL), and chip temperature sensing - all operating across –40 °C to +105 °C.

Key Specifications

Pinout & Package

MM912F634CV2AP uses a 48-pin LQFP (98ASH00962A) with non-exposed pad (AP suffix), 7.0 mm × 7.0 mm footprint, and 0.5 mm pitch. Pin functions are defined per Freescale Document Number MM912F634 Rev. 9.0.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar relay driver with LIN applications.

Compared with MC9S12G240F0MLH and TLIN1029DR, MM912F634CV2AP uniquely combines MCU, LIN PHY, and protected drivers in one package - reducing board space, BOM count, and qualification effort for automotive relay control nodes.

Availability

MM912F634CV2AP is available at Aetrix Electronics and suitable for automotive body electronics, LIN-based relay control systems, and under-hood actuator modules requiring stable component supply across extended temperature ranges.

Supply support for MM912F634CV2AP 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 acquired Freescale in 2015 and maintains full support for the legacy S12 portfolio, including long-term supply and documentation for automotive-qualified devices.

The MM912F634CV2AP belongs to NXP's integrated relay driver product line, designed specifically for cost-sensitive, space-constrained automotive body control applications requiring LIN connectivity and diagnostic-ready load driving.

FAQ

What is the maximum bus frequency supported by the MM912F634CV2AP?

The MM912F634CV2AP supports a maximum bus frequency of 16 MHz, as specified in Table 1 of the ordering information section. This frequency governs the timing of the HCS12 core, peripheral modules (ADC, TIM, PWM), and LIN communication - ensuring deterministic execution for real-time relay control tasks. The MM912F634CV2AP achieves this using its internal oscillator with optional external crystal (EXTAL/XTAL) trimming.

Does the MM912F634CV2AP include built-in current sensing capability?

Yes, the MM912F634CV2AP includes a dedicated current sense module with differential inputs ISENSEH and ISENSEL (pins 41 and 40). These support shunt-based measurement with selectable gain, enabling real-time load current monitoring for diagnostics such as open-circuit or short-circuit detection. This feature is confirmed in Section 4.20 and Figure 3 of the device data sheet.

What is the difference between MM912F634CV2AP and MM912F634DV2AE?

The MM912F634CV2AP uses a 48-pin LQFP package without exposed pad (98ASH00962A), while MM912F634DV2AE uses the same pin count but with exposed pad (98ASA00173D). Both share identical Analog Option 2 (L0–L3 wake-up inputs, no current sense), 16 MHz bus frequency, and –40 °C to +105 °C rating. Thermal performance differs due to thermal pad presence - DV2AE offers better heat dissipation in high-power operation.

Which high-voltage inputs are available on the MM912F634CV2AP?

The MM912F634CV2AP implements Analog Option 2, providing four high-voltage inputs: L0, L1, L2, and L3 (pins 31–34). Each supports digital input, wake-up triggering, and analog measurement (0–5 V or 0–18 V range via internal divider). L4 and L5 are not functional in this variant - confirmed in Table 2 ("Analog Options") and Section 4.2.3 of the datasheet.

Is the MM912F634CV2AP qualified for automotive applications?

Yes, the MM912F634CV2AP is AEC-Q100 qualified and designed for automotive use, with features including –40 °C to +105 °C operation, reverse-battery protection on VSENSE, ISO 7637-2 transient immunity, and thermal shutdown. Its integrated LIN 2.1 PHY and protected drivers meet requirements for body electronics modules per ISO 11898-4 and ISO 16750 standards.