S9S12XF384J2MLMR - 16-bit S12X FlexRay MCU 384KB | NXP
MPN: S9S12XF384J2MLMR ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
S9S12XF384J2MLMR Overview
A microcontroller (MCU) is a single-chip computer that combines a processor core, memory, and peripherals on one die, sitting at the lowest level of the embedded-systems hierarchy: MCU -> embedded processor -> semiconductor device. The S12X family from NXP (originally Freescale) targets distributed control, where many low-cost nodes share network traffic rather than one central computer.
Key differentiating features of this part include the XGATE coprocessor, which offloads communication and interrupt handling from the main CPU12 core to keep real-time control loops deterministic, and the integrated FlexRay controller for time-triggered, fault-tolerant in-vehicle networking. The 384KB on-chip Flash provides ample room for protocol stacks and diagnostic layers (UDS/OBD), while the automotive temperature grade supports underhood and body electronics exposed to harsh environments.
Technically, the S12XF family belongs to the HCS12/S12X lineage: a 16-bit CISC core with an enhanced instruction set, peripheral co-processing via XGATE, and a peripheral set typically including CAN, SCI/SPI, ADC, timer/PWM modules. Distributor listings report core operation of up to 40MHz (CPU12) with the device marketed at 50MHz (XGATE), and the family spans memory options from 256KB to 512KB Flash in packages from 64-pin to 112-pin LQFP.
Typical applications are FlexRay satellite nodes for body, chassis and safety domains: door modules, seat control, lighting control, suspension sensors, and gateway-assist functions where FlexRay bandwidth and deterministic latency matter.
Design consideration: verify the supply-voltage domain (one distributor lists 1.72V-1.98V, another 5V VDD family operation) against the official NXP S12XF datasheet before schematic capture, and confirm EOL/last-time-buy status for new designs.
This page synthesizes distributor pricing context, same-family drop-in alternatives, and practical sourcing notes not found on any single datasheet.
Drop-in alternatives for S9S12XF384J2MLMR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with S9S12XF384J2MLMR (same form factor and footprint) — differing in Package, Operating Temperature, Core, RoHS Status, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S9S12XF384J2MLM
✅ Drop-In📋 Reference alternative (not in catalog)
S9S12XF512J2MLMR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S9S12XF256J2MLMR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S9S12XF384J2MLMR Maximum Ratings & Electrical Characteristics
| Core Processor | S12X (CPU12), 16-bit |
| Coprocessor | XGATE |
| Core Clock | Up to 40 MHz (CPU12, per Microchip USA); device marketed at 50 MHz |
| Flash Memory | 384 KB |
| RAM | 24 KB |
| Operating Temperature | -40C to +125C |
| Qualification | Automotive Qualified |
| Package | 112-pin LQFP (QFP), S-PQFP-G112, square |
| Terminal Pitch | 0.65 mm |
| Terminal Form | Gull Wing |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T/R) |
| Number of Terminals | 112 |
| RoHS Status | unknown |
S9S12XF384J2MLMR 112-pin lqfp (qfp), s-pqfp-g112, square Pin Configuration Guide
Pin configuration for S9S12XF384J2MLMR (112-pin lqfp (qfp), s-pqfp-g112, square package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for S9S12XF384J2MLMR.
Refer to the datasheet for full pin configuration.
Typical Applications
S9S12XF384J2MLMR is suitable for 6 applications: FlexRay Satellite Nodes, Automotive Body Electronics, Chassis and Safety Systems, Network Gateway Assist, HVAC and Climate Control, Industrial Distributed Control (Legacy Inheritance).
FlexRay Satellite Nodes
The S9S12XF384J2MLMR was designed by NXP specifically as a cost-effective distributed-control solution for satellite nodes on FlexRay networks in body, chassis, and safety domains. Its integrated FlexRay controller provides time-triggered, deterministic, fault-tolerant communication without an external network chip, while the XGATE coprocessor services the FlexRay stack and interrupt handling independently of the CPU12 core, preserving real-time behavior for local control loops. With 384KB Flash, a node can host the full FlexRay driver plus UDS diagnostics and application firmware. Used in door modules, lighting ECUs, and suspension sensing nodes where 16-bit performance and network bandwidth are balanced against BOM cost.
Recommended
Automotive Body Electronics
Body control functions such as central locking, window lifting, mirror adjustment, and seat positioning benefit from the S9S12XF384J2MLMR combination of 16-bit CPU12 real-time performance, XGATE-offloaded communication, and the automotive -40C to +125C temperature grade. The 384KB Flash is large enough for LIN/CAN/FlexRay gateway assist code, diagnostic layers, and feature-rich firmware with headroom for OTA-era growth. The 112-pin LQFP supplies ample GPIO count to drive relays, H-bridges, and switch matrices directly. In a typical topology the MCU sits on the FlexRay backbone as a satellite node, sampling switch inputs and driving loads while reporting status on the deterministic schedule.
Recommended
Chassis and Safety Systems
Chassis and safety nodes - suspension level sensing, chassis attitude monitoring, and safety-domain satellite controllers - require deterministic communication and qualified operation over the full automotive temperature range, both delivered by the S9S12XF384J2MLMR. FlexRay's fault-tolerant time-triggered protocol is natively supported by the on-chip controller, and the XGATE coprocessor keeps bus scheduling isolated from control code, which matters for functions with latency budgets. The device's automotive qualification supports deployment in harsh underbody-adjacent environments. Its 24KB RAM hosts double-buffered network message pools and filter states for safety-relevant signal validation before values are forwarded to central controllers.
Recommended
Network Gateway Assist
In architectures where a central gateway routes between FlexRay, CAN, and Ethernet domains, S9S12XF384J2MLMR-based satellite nodes act as intelligent pre-processors, aggregating local CAN/LIN traffic and forwarding it on the FlexRay backbone. The XGATE coprocessor handles message translation and filtering concurrently with CPU12 application tasks, and 384KB Flash accommodates multiple protocol stacks simultaneously. This offload reduces gateway loading and shortens end-to-end latency for time-critical signals. Designers should budget Flash for stack coexistence and reserve RAM headroom for FlexRay message buffers, typically several kilobytes for a full static segment schedule with dynamic segment messaging.
Recommended
HVAC and Climate Control
Automotive HVAC controllers coordinate blower motors, blend-door actuators, and temperature sensor networks, communicating over the in-vehicle network from a body or chassis node. The S9S12XF384J2MLMR provides the ADC peripherals needed for thermistor and potentiometer feedback, timer/PWM resources for actuator drive, and the FlexRay controller for integration into FlexRay-based vehicle platforms. The 16-bit CPU12 core handles closed-loop temperature control algorithms with deterministic timing, while XGATE manages communication scheduling. Operation to +125C supports placement in the engine-bay-adjacent HVAC housing, and 384KB Flash allows sophisticated comfort algorithms plus full diagnostic coverage.
Recommended
Industrial Distributed Control (Legacy Inheritance)
Although designed for automotive FlexRay networks, surplus S9S12XF384J2MLMR devices are frequently adopted in industrial distributed-control systems that inherited S12X toolchains, code bases, and debug infrastructure. The 16-bit CISC core, XGATE offload, and rich peripheral set map well to factory satellite nodes requiring deterministic serial communication and moderate compute. The 112-pin LQFP provides enough I/O for machine-level sensing and actuation, and 384KB Flash supports protocol bridges and local control logic. Engineers should note the part's automotive qualification and EOL status: secure lifetime buys or qualify the S9S12XF512J2MLMR superset variant for long-term industrial programs.
Recommended
Recommended Products Summary
Engineering reference data for S9S12XF384J2MLMR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S9S12XF384J2MLM | S9S12XF512J2MLMR | S9S12XF256J2MLMR |
|---|---|---|---|---|
| Package | 112-pin LQFP (S-PQFP-G112) | 112-pin LQFP - same | 112-pin LQFP - same | 112-pin LQFP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 384 KB | 384 KB | 512 KB | 256 KB |
| Core | S12X (CPU12) + XGATE | S12X (CPU12) + XGATE | S12X (CPU12) + XGATE | S12X (CPU12) + XGATE |
| FlexRay Controller | Integrated | Integrated | Integrated | Integrated |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Native integrated FlexRay controller (vs S9S12XF256J2MLMR)
- XGATE coprocessor offloads communication (vs S9S12XF384J2MLM)
- Flash upgrade headroom on the same footprint (vs S9S12XF512J2MLMR)
Design Notes
Verify supply voltage domains before schematic release: Microchip USA lists a 1.72V-1.98V supply range for this MPN while Makat lists the family as 5V - the S12XF family typically uses a 5V main supply with an internal 1.8V core regulator, so the conflicting figures likely describe different domains. Confirm against the official NXP S12XF data sheet and design the board-level regulator and decoupling (100nF per power pin plus bulk capacitance) for the correct domain.
This part is End-of-Life (the related S9S12XF384J2MLM shows EOL on NXP.com). For new designs, secure lifetime-buy quantities via RFQ or qualify the S9S12XF512J2MLMR superset variant, which is footprint-compatible and gives 33% more Flash. Beware broker-supplied parts: demand date-code and provenance documentation, and consider programming/calibration implications of remarketed devices in safety-relevant nodes.
The 112-pin LQFP with 0.65mm pitch requires standard gull-wing footprints per the S-PQFP-G112 JEDEC outline; use a solder-mask-defined pad geometry with ~0.3mm pad width extensions for reliable reflow, and route FlexRay differential pairs (BA_ positive/negative bus lines) as 80-120 ohm controlled-impedance pairs per your FlexRay network specification. Provide a solid ground plane under the MCU and place the crystal and decoupling network close to their pins.
Compliance Information
Distributor data confirms 'Automotive Qualified' temperature grade (-40C to +125C) but does not state AEC-Q100, RoHS, REACH, lead-free, or halogen-free status. Confirm on the official NXP product page.
