S9S12Q64J2CFAE8R - 16-bit S12 MCU, 64KB Flash, LQFP-48 | NXP
MPN: S9S12Q64J2CFAE8R ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
S9S12Q64J2CFAE8R Overview
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, nonvolatile program memory, RAM, and a set of peripherals such as timers, serial interfaces, and analog-to-digital converters on one die. Within the broader hierarchy of embedded processors, MCUs sit below application processors and are optimized for deterministic, low-power control tasks. The S12 family belongs to NXP's legacy 16-bit MCU lineage, widely deployed in automotive body electronics and industrial control.
Key features of the S9S12Q64J2CFAE8R include the cost-effective 16-bit S12 CPU core, up to 128 KB flash capacity across the MC9S12Q family (64 KB on this variant), an on-chip bandgap-based voltage regulator (Vreg) that generates the internal digital supply (VDD) from a 2.97 V to 5.5 V external supply, and an integrated phase-locked loop (PLL) for flexible system clock generation.
Technically, the device combines the flash-based memory architecture of the S12C/S12Q family with a single-supply design: the internal Vreg removes the need for a separate core rail, reducing bill-of-materials cost and board area. The PLL allows the oscillator input to be multiplied to the maximum bus speed, letting designers trade EMC performance against execution throughput.
Typical applications include automotive body control modules, door and seat control units, HVAC controllers, and general-purpose industrial network nodes where CAN/LIN connectivity and cost sensitivity dominate.
A key design consideration is supply decoupling of the internal regulator and careful PLL loop-filter layout per the manufacturer reference design to meet EMC targets.
This page synthesizes distributor availability, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for S9S12Q64J2CFAE8R — 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 S9S12Q64J2CFAE8R (same form factor and footprint) — differing in Operating Temperature, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S9S12Q128J2CFAE8R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S9S12Q32J2CFAE8R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S9S12Q96J2CFAE8R
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S9S12C64J2CFAE
✅ Drop-In📋 Reference alternative (not in catalog)
S9S12Q64J2CFAE8R Maximum Ratings & Electrical Characteristics
| Core Processor | S12 (16-bit) |
| Core Size | 16-bit |
| Flash Memory | 64 KB |
| Maximum Flash (Family) | 128 KB |
| Bus Frequency | 16 MHz |
| Operating Temperature | -40C to +85C |
| Supply Voltage Range | 2.97 V to 5.5 V |
| Internal Regulator | Yes (on-chip Vreg, bandgap-based) |
| PLL | Yes (on-chip phase-locked loop) |
| Package | LQFP-48 (QFP 48) |
| Mounting Type | Surface Mount |
| Qualification | Automotive Qualified |
| Series | S12Q (MC9S12Q) |
| Application Segment | Automotive and Industrial |
| Packaging | Reel (R suffix) |
S9S12Q64J2CFAE8R lqfp-48 (qfp 48) Pin Configuration Guide
Pin configuration for S9S12Q64J2CFAE8R (lqfp-48 (qfp 48) 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 S9S12Q64J2CFAE8R.
Refer to the datasheet for full pin configuration.
Typical Applications
S9S12Q64J2CFAE8R is suitable for 6 applications: Automotive Body Control Modules, Door and Seat Control Units, HVAC Climate Controllers, Industrial Network Nodes, Sensor and Actuator Interface Modules, Off-Highway and Agricultural Electronics.
Automotive Body Control Modules
The S9S12Q64J2CFAE8R fits body control modules (BCM) because its 16-bit S12 core delivers deterministic interrupt latency for relay and lamp timing while the 64 KB flash comfortably holds diagnostics and network stacks in a cost-sensitive ECU. The automotive qualification and -40C to +85C range cover under-dash thermal environments, and the on-chip Vreg operating from 2.97 V to 5.5 V tolerates crank and load-dump-conditioned supply rails. In a typical BCM, the MCU drives high-side switches via PWM timers and reads switch matrices through its port pins, with the PLL set to 16 MHz bus operation. The single-supply design removes a core regulator, cutting BOM cost in high-volume modules.
Recommended
Door and Seat Control Units
Door modules and memory seat controllers favor the S9S12Q64J2CFAE8R because its flash-based memory supports field reprogramming of position calibration tables, while the 48-pin LQFP-48 footprint fits the small PCBs inside door trims. The 16 MHz S12 core provides enough throughput for PWM motor control of windows, mirrors, and seat actuators with soft-start ramp profiles, and its port structure supports direct H-bridge interfacing. The -40C to +85C qualification handles cabin extremes near windshields and footwells. Using the on-chip Vreg from a 5 V module rail, designers avoid external regulator circuitry; current consumption remains low in sleep modes, important for quiescent-drain budgets.
Recommended
HVAC Climate Controllers
In automotive HVAC controllers the S9S12Q64J2CFAE8R manages blend-door servos, blower PWM, and sensor polling within its 64 KB flash and 16 MHz bus budget. The S12 timer channels generate the servo pulse-width outputs directly, while analog temperature sensor inputs are handled by the family's on-chip ADC peripherals. The -40C to +85C grade suits under-dashboard mounting, and the on-chip bandgap Vreg lets the controller run from a single conditioned 5 V rail between 2.97 V and 5.5 V during transients. PLL-based clocking lets engineers trade EMC performance against processing headroom for humidity and sun-load algorithms, keeping module cost low at high volumes.
Recommended
Industrial Network Nodes
General-purpose industrial nodes adopt the S9S12Q64J2CFAE8R for the same reasons automotive users do: a proven 16-bit S12 core with mature CodeWarrior tooling, flash-based firmware updates in the field, and a wide 2.97 V to 5.5 V single-supply input that simplifies 5 V DIN-rail power designs. At 16 MHz the core handles Modbus-style polling, sensor scaling, and local I/O sequencing inside a 64 KB code space. The LQFP-48 package suits compact I/O modules on DIN-rail carriers, and the -40C floor supports unheated enclosures. The on-chip Vreg and PLL reduce external component count, and the family's documented CAN/LIN ecosystem connects nodes to plant networks.
Recommended
Sensor and Actuator Interface Modules
The S9S12Q64J2CFAE8R serves as the intelligence in sensor acquisition and actuator driver modules, where its 16 MHz S12 core performs filtering and threshold logic while timer channels generate control pulses. The 64 KB flash stores linearization tables and calibration constants with in-system update capability, and the on-chip ADC resources digitize sensor inputs without an external converter in many designs. Supply flexibility from 2.97 V to 5.5 V via the internal bandgap Vreg allows direct connection to either 3.3 V or 5 V rails, easing mixed-voltage panel designs. The LQFP-48 package balances I/O count against board area in densely packed interface boards.
Recommended
Off-Highway and Agricultural Electronics
Off-highway equipment ECUs benefit from the S9S12Q64J2CFAE8R's combination of automotive-grade robustness and low unit cost at moderate volumes. Its -40C to +85C operation and 2.97 V to 5.5 V supply tolerance, conditioned through the on-chip Vreg, survive engine-bay temperature cycling and regulator droop during starter-motor cranking. The 16 MHz S12 core executes valve-timing and guard-monitoring logic deterministically, while 64 KB flash hosts ISOBUS-lite application code with room for service-tool protocols. The LQFP-48 package suits sealed control boxes, and the mature S12 toolchain lowers development cost for fleet operators maintaining long product lifecycles.
Recommended
Recommended Products Summary
Engineering reference data for S9S12Q64J2CFAE8R — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S9S12Q128J2CFAE8R | S9S12Q32J2CFAE8R | S9S12Q96J2CFAE8R | S9S12C64J2CFAE |
|---|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 - same | LQFP-48 - same | LQFP-48 - same | LQFP-48 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | S12 16-bit | S12 16-bit | S12 16-bit | S12 16-bit | S12 16-bit |
| Flash Memory | 64 KB | 128 KB | 32 KB | 96 KB | 64 KB |
| Bus Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz (PLL available) |
| Automotive Qualification | Yes | Yes | Yes | Yes | Standard grade (verify) |
| On-chip Vreg / PLL | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Key Differentiators
- Best cost-to-memory balance in the Q family (vs S9S12Q128J2CFAE8R)
- Growth headroom without redesign (vs S9S12Q32J2CFAE8R)
- Automotive-grade ordering code (vs S9S12C64J2CFAE)
Design Notes
The S9S12Q64J2CFAE8R runs from a 2.97 V to 5.5 V external supply that feeds the on-chip bandgap-based Vreg generating the internal VDD core rail. Decouple the Vreg output pin with a low-ESR ceramic capacitor placed within a few millimeters of the pin, per NXP S12 hardware design application notes, to prevent core-rail droop during flash write operations. If the module rail dips below 2.97 V during crank transients, add upstream bulk capacitance or use a system basis chip such as the MC33989 to condition the supply.
The PLL multiplies the reference oscillator up to the 16 MHz bus frequency. Use the loop-filter component values from the manufacturer reference design in the family datasheet, keep the filter traces as short as possible, and route them away from PWM and transceiver switching currents. In automotive EMC testing, the PLL bandwidth directly affects conducted emissions in the 150 kHz to 30 MHz band; slowing the PLL to the lowest acceptable bus speed is a valid trade-off when margins are tight.
Do not confuse ordering variants: the R suffix indicates tape-and-reel packaging, and the E8 temperature/qualification code designates the -40C to +85C automotive grade - substituting a commercial suffix will break qualification traceability. Also verify the mask-set and peripheral configuration when migrating code between S12Q and S12C parts; although the families share the S12 core and documentation, register maps for some peripherals can differ between mask revisions. Always re-run flash-programming routines built with the current CodeWarrior S12 target after any die revision change.
Compliance Information
The NXP part information PDF (nxp.com/mcds/S9S12Q64J2CFAE8R.pdf) contains substance-compliance content (cadmium and lead compound entries) but detailed RoHS/REACH status was not extractable from provided snippets - consult the PDF directly. Automotive qualification is confirmed by distributor product data (S9S prefix, E8 grade).
