NXP Semiconductors MM912F634DV2APR2

Overview

MM912F634DV2APR2 from NXP Semiconductors (formerly Freescale) is an integrated S12-based relay driver with LIN physical layer, combining an HCS12 microcontroller (32 kB Flash, 2 kB RAM, 16-bit CPU) and SMARTMOS analog control IC in a single 48-pin LQFP package. It delivers two protected high-side outputs, two protected low-side outputs, LIN 2.1 interface, 10-bit 15-channel ADC, and six high-voltage wake-up inputs - designed for automotive body control modules requiring consolidated power switching and communication.

For engineers reviewing the MM912F634DV2APR2 datasheet, MM912F634DV2APR2 pinout, MM912F634DV2APR2 application, or MM912F634DV2APR2 equivalent, this page provides verified functional architecture, validated pin roles, confirmed analog die Option 2 configuration (no current sense, L0–L3 wake-up only), and real-world design implications for automotive relay control and LIN node integration.

Technical Context

The MM912F634DV2APR2 implements a dual-die architecture: an HCS12 MCU die (20 MHz bus max for DV1AE, 16 MHz for DV2AP) communicates with an analog die via Die-to-Die (D2D) bus, enabling transparent memory-mapped access to high-voltage I/O, drivers, and sensing functions. The analog die includes cascaded voltage regulators (VDD = 2.5 V, VDDX = 5.0 V), reverse-battery-protected VS1/VS2 supplies, and integrated LIN transceiver with SCI coupling.

It supports low-power cyclic sense mode with forced wake-up via six configurable high-voltage inputs (L0–L5), though Option 2 restricts wake-up capability to L0–L3. The device integrates Hall sensor supply (HSUP, 18 V regulated), chip temperature sensing, and battery voltage monitoring (VSENSE) with internal scaling - all coordinated through shared MCU peripherals including TIM16B4C, PWM8B2C, and ADC.

Key Specifications

Pinout & Package

MM912F634DV2APR2 uses a 48-pin LQFP package (98ASH00962A) with 0.5 mm pitch and non-exposed pad (AP). Pin functions are validated per Freescale Document MM912F634 Rev. 9.0 (June 2015), Table 3. Analog die Option 2 disables ISENSEL/ISENSEH and L4/L5 wake-up functionality.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12G240F0MLH and SPC560B50L5, MM912F634DV2APR2 uniquely combines MCU, LIN PHY, and protected drivers in one package - reducing bill-of-materials, PCB area, and qualification effort for cost-sensitive automotive body electronics where integration outweighs raw compute headroom.

Availability

MM912F634DV2APR2 is available at Aetrix Electronics and suitable for automotive body control modules, smart junction boxes, seat control units, and roof modules requiring stable component supply across extended temperature ranges (−40 °C to +105 °C).

Supply support for MM912F634DV2APR2 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, formed from the acquisition of Freescale Semiconductor in 2015.

The MM912F634 series belongs to NXP's legacy automotive microcontroller portfolio, specifically engineered for integrated power switching and LIN communication in body electronics - targeting reduced system cost and enhanced functional safety in 12 V vehicle architectures.

FAQ

What is the maximum bus frequency supported by MM912F634DV2APR2?

The MM912F634DV2APR2 supports a maximum bus frequency of 16 MHz, as specified in Table 1 of the Freescale MM912F634 datasheet Rev. 9.0. This is lower than the 20 MHz capability of the DV1AE variant due to analog die Option 2 timing constraints. The 16 MHz clock enables deterministic execution of LIN protocol timing and relay control loops within the HCS12 core.

Does MM912F634DV2APR2 include current sense functionality?

No, MM912F634DV2APR2 implements Analog Option 2, which excludes the current sense module (ISENSEL/ISENSEH pins are not functional). This is confirmed in Table 2 of the datasheet and Section 4.2.3. Designers requiring current monitoring must add an external shunt and amplifier or select the DV1AE/DV2AE variants with Option 1 enabled.

What is the purpose of the HSUP pin on MM912F634DV2APR2?

The HSUP pin on MM912F634DV2APR2 provides a regulated 18 V output derived from VS1, specifically designed to power Hall-effect sensors. As documented in Section 4.10, it requires an external decoupling capacitor (CHSUP) and supports typical Hall sensor current loads up to 10 mA - eliminating the need for a separate voltage regulator in seat or motor position sensing applications.

How many wake-up inputs does MM912F634DV2APR2 support in its configured analog option?

MM912F634DV2APR2 uses Analog Option 2, which supports wake-up functionality on L0 through L3 only - four high-voltage inputs. L4 and L5 are present physically but lack wake-up capability in this variant, as explicitly stated in Table 2 and Section 4.2.3 of the datasheet. This configuration balances feature set and cost for mid-tier automotive modules.

Is MM912F634DV2APR2 pin-compatible with other MM912F634 variants?

Yes, all MM912F634 variants - including MM912F634DV2APR2 - share identical 48-pin LQFP packaging and pinout per Figure 4 and Table 3. However, functional differences exist: DV2AP excludes current sense and limits wake-up to L0–L3, while DV1AE enables full L0–L5 wake-up and ISENSE. Hardware layout remains interchangeable, but firmware must account for disabled features.