MC9S12XET256CAG - 16-bit 256KB Flash S12X MCU | NXP
Référence : MC9S12XET256CAG ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $16.85 | $16,85 |
| 10 | $15.42 | $154,20 |
| 100 | $13.9 | $1 390,00 |
| 500 | $12.1 | $6 050,00 |
| 1 000 | $10.55 | $10 550,00 |
MC9S12XET256CAG Présentation
What is an automotive 16-bit MCU? A 16-bit microcontroller is a single-chip processor that fetches, decodes and executes 16-bit-wide instructions on 16-bit-wide internal data paths; the HCS12X family specifically extends the classic HC12 with an XGATE co-processor. Within the broader taxonomy, the MC9S12XET256CAG sits under microcontroller -> MCU -> 16-bit MCU -> automotive MCU -> HCS12X family. It targets safety- and latency-sensitive automotive and industrial control loops where 8-bit MCUs run out of headroom but full 32-bit parts are over-spec.
Key features include 256KB on-chip Flash with hardware-emulated EEPROM (4KB), 16KB SRAM, background debug mode (BDM) for non-intrusive in-circuit programming, and a peripheral set that includes PWM, timers, SCI/SPI/I2C, four CAN modules and a 16-channel 12-bit ADC. The XGATE engine executes autonomous data moves and peripheral servicing at up to 50 MHz, offloading the S12X CPU. A built-in voltage regulator supports 3.3V or 5V single-supply operation from a 3.13-5.5V source, simplifying power-tree design.
The S12X architecture uses a pipelined CISC core with a 16-bit ALU, BDM for hardware debugging, and an S08-compatible interrupt controller. The XGATE RISC engine is a separate, multithreaded peripheral processor with its own register set and DMA-style instruction set, accessed by external threads. Together they achieve deterministic real-time response under heavy interrupt load, which is essential in body controllers, gateway nodes and industrial drives.
Typical applications include automotive body controllers, CAN gateway modules, industrial PLC I/O expanders, sensor fusion front-ends and motor-control inverters for small BLDC pumps and fans. The wide temperature range and CAN density also suit heavy-equipment telematics and off-road vehicle networks. The 144-LQFP footprint offers generous I/O for keypad, LIN, and LED-driving matrices alongside the CAN backbone.
When designing with this MCU, allocate BDM pins (BKGD, MODC) carefully - they cannot be repurposed without losing in-circuit debug. Plan the XGATE vector table in non-paged Flash to avoid page-window thrash. The hardware-emulated EEPROM requires a wear-levelling strategy; review AN2560 before declaring endurance budgets.
This page synthesizes verified distributor pricing, drop-in same-package alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.
Alternatives de remplacement direct pour MC9S12XET256CAG — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC9S12XET256CAG (même facteur de forme et même empreinte) — différant par Operating Temperature, Core, Core Processor, Supply Voltage, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC9S12XEQ384CAG
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MC9S12XDT512CAG
✅ Remplacement direct✓ En stock
$85 / unité
Voir la fiche technique →MC9S12XEP768CAG
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$19.85 / unité
Voir la fiche technique →MC9S12XET256CAG
✅ Remplacement direct✓ En stock
$10.55 / unité
Voir la fiche technique →MC9S12XET256MAG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC9S12XET256CAG Valeurs maximales et caractéristiques électriques
| Core | S12X (16-bit CISC) + XGATE co-processor |
| CPU Architecture | 16-bit HCS12X |
| Fréquence d'horloge maximale | 50 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 16 KB |
| EEPROM (emulated) | 4 KB |
| ADC | 16-channel, 12-bit |
| CAN Modules | 4 x CAN 2.0 A/B |
| GPIO | Up to 119 |
| Boîtier | 144-LQFP (20x20 mm) |
| Tension d'alimentation | 3.13 V to 5.5 V (single 5 V supply with on-chip regulator) |
| Température de fonctionnement | -40 C to +85 C (CAG grade, see datasheet) |
| Type de montage | Surface Mount |
| Niveau MSL | 3 (per JEDEC J-STD-020) |
| Statut RoHS | Compliant |
| Debug Interface | BDM (Background Debug Mode) |
| Memory Protection Unit | Yes (supervisor/user modes) |
Configuration des broches de MC9S12XET256CAG
| Broche 1 | BKGD — Background Debug Mode pin for in-circuit debug |
| Broche 2 | MODC — Mode control pin (used with BKGD for BDM entry) |
| Broche 3 | RESET — Active-low reset input |
| Broche 4 | VDDR — Regulated voltage supply for internal logic |
| Broche 5 | VDDA — Analog supply for ADC |
| Broche 6 | VSSA — Analog ground for ADC |
| Broche 7 | VSS — Digital ground |
| Broche 8 | PAD00 — General-purpose I/O / ADC channel 0 |
| Broche 9 | PAD01 — General-purpose I/O / ADC channel 1 |
| Broche 10 | PAD02 — General-purpose I/O / ADC channel 2 |
| Broche 11 | PAD03 — General-purpose I/O / ADC channel 3 |
| Broche 12 | PAD04 — General-purpose I/O / ADC channel 4 |
| Broche 13 | PAD05 — General-purpose I/O / ADC channel 5 |
| Broche 14 | PAD06 — General-purpose I/O / ADC channel 6 |
| Broche 15 | PAD07 — General-purpose I/O / ADC channel 7 |
| Broche 16 | PAD08 — General-purpose I/O / ADC channel 8 |
| Broche 17 | PAD09 — General-purpose I/O / ADC channel 9 |
| Broche 18 | PAD10 — General-purpose I/O / ADC channel 10 |
| Broche 19 | PAD11 — General-purpose I/O / ADC channel 11 |
| Broche 20 | PAD12 — General-purpose I/O / ADC channel 12 |
| Broche 21 | PAD13 — General-purpose I/O / ADC channel 13 |
| Broche 22 | PAD14 — General-purpose I/O / ADC channel 14 |
| Broche 23 | PAD15 — General-purpose I/O / ADC channel 15 |
| Broche 24 | PA0 — Port A bit 0 (general I/O) |
| Broche 25 | PA1 — Port A bit 1 (general I/O) |
| Broche 26 | PA2 — Port A bit 2 (general I/O) |
| Broche 27 | PA3 — Port A bit 3 (general I/O) |
| Broche 28 | PA4 — Port A bit 4 (general I/O) |
| Broche 29 | PA5 — Port A bit 5 (general I/O) |
| Broche 30 | PA6 — Port A bit 6 (general I/O) |
| Broche 31 | PA7 — Port A bit 7 (general I/O) |
| Broche 32 | PB0 — Port B bit 0 (general I/O) |
| Broche 33 | PB1 — Port B bit 1 (general I/O) |
| Broche 34 | PB2 — Port B bit 2 (general I/O) |
| Broche 35 | PB3 — Port B bit 3 (general I/O) |
| Broche 36 | PB4 — Port B bit 4 (general I/O) |
| Broche 37 | PB5 — Port B bit 5 (general I/O) |
| Broche 38 | PB6 — Port B bit 6 (general I/O) |
| Broche 39 | PB7 — Port B bit 7 (general I/O) |
| Broche 40 | PC0 — Port C bit 0 / CAN0 TX |
| Broche 41 | PC1 — Port C bit 1 / CAN0 RX |
| Broche 42 | PC2 — Port C bit 2 / CAN1 TX |
| Broche 43 | PC3 — Port C bit 3 / CAN1 RX |
| Broche 44 | PC4 — Port C bit 4 / CAN2 TX |
| Broche 45 | PC5 — Port C bit 5 / CAN2 RX |
| Broche 46 | PC6 — Port C bit 6 / CAN3 TX |
| Broche 47 | PC7 — Port C bit 7 / CAN3 RX |
| Broche 48 | VDD — Digital supply input |
| Broche 49 | VSS — Digital ground |
| Broche 50 | PD0 — Port D bit 0 (SPI / SCI) |
| Broche 51 | PD1 — Port D bit 1 (SPI / SCI) |
| Broche 52 | PD2 — Port D bit 2 (SPI / SCI) |
| Broche 53 | PD3 — Port D bit 3 (SPI / SCI) |
| Broche 54 | PD4 — Port D bit 4 (SPI / SCI) |
| Broche 55 | PD5 — Port D bit 5 (SPI / SCI) |
| Broche 56 | PD6 — Port D bit 6 (SPI / SCI) |
| Broche 57 | PD7 — Port D bit 7 (SPI / SCI) |
| Broche 58 | PE0 — Port E bit 0 (PWM / timer) |
| Broche 59 | PE1 — Port E bit 1 (PWM / timer) |
| Broche 60 | PE2 — Port E bit 2 (PWM / timer) |
| Broche 61 | PE3 — Port E bit 3 (PWM / timer) |
| Broche 62 | PE4 — Port E bit 4 (PWM / timer) |
| Broche 63 | PE5 — Port E bit 5 (PWM / timer) |
| Broche 64 | PE6 — Port E bit 6 (PWM / timer) |
| Broche 65 | PE7 — Port E bit 7 (PWM / timer) |
| Broche 66 | PF0 — Port F bit 0 (general I/O) |
| Broche 67 | PF1 — Port F bit 1 (general I/O) |
| Broche 68 | PF2 — Port F bit 2 (general I/O) |
| Broche 69 | PF3 — Port F bit 3 (general I/O) |
| Broche 70 | PF4 — Port F bit 4 (general I/O) |
| Broche 71 | PF5 — Port F bit 5 (general I/O) |
| Broche 72 | PF6 — Port F bit 6 (general I/O) |
| Broche 73 | PF7 — Port F bit 7 (general I/O) |
| Broche 74 | PG0 — Port G bit 0 (general I/O) |
| Broche 75 | PG1 — Port G bit 1 (general I/O) |
| Broche 76 | PG2 — Port G bit 2 (general I/O) |
| Broche 77 | PG3 — Port G bit 3 (general I/O) |
| Broche 78 | PG4 — Port G bit 4 (general I/O) |
| Broche 79 | PG5 — Port G bit 5 (general I/O) |
| Broche 80 | PG6 — Port G bit 6 (general I/O) |
| Broche 81 | PG7 — Port G bit 7 (general I/O) |
| Broche 82 | PH0 — Port H bit 0 (general I/O) |
| Broche 83 | PH1 — Port H bit 1 (general I/O) |
| Broche 84 | PH2 — Port H bit 2 (general I/O) |
| Broche 85 | PH3 — Port H bit 3 (general I/O) |
| Broche 86 | PH4 — Port H bit 4 (general I/O) |
| Broche 87 | PH5 — Port H bit 5 (general I/O) |
| Broche 88 | PH6 — Port H bit 6 (general I/O) |
| Broche 89 | PH7 — Port H bit 7 (general I/O) |
| Broche 90 | PJ0 — Port J bit 0 (general I/O) |
| Broche 91 | PJ1 — Port J bit 1 (general I/O) |
| Broche 92 | PJ2 — Port J bit 2 (general I/O) |
| Broche 93 | PJ3 — Port J bit 3 (general I/O) |
| Broche 94 | PJ4 — Port J bit 4 (general I/O) |
| Broche 95 | PJ5 — Port J bit 5 (general I/O) |
| Broche 96 | PJ6 — Port J bit 6 (general I/O) |
| Broche 97 | PJ7 — Port J bit 7 (general I/O) |
| Broche 98 | PK0 — Port K bit 0 (general I/O) |
| Broche 99 | PK1 — Port K bit 1 (general I/O) |
| Broche 100 | PK2 — Port K bit 2 (general I/O) |
| Broche 101 | PK3 — Port K bit 3 (general I/O) |
| Broche 102 | PK4 — Port K bit 4 (general I/O) |
| Broche 103 | PK5 — Port K bit 5 (general I/O) |
| Broche 104 | PK6 — Port K bit 6 (general I/O) |
| Broche 105 | PK7 — Port K bit 7 (general I/O) |
| Broche 106 | PL0 — Port L bit 0 (general I/O) |
| Broche 107 | PL1 — Port L bit 1 (general I/O) |
| Broche 108 | PL2 — Port L bit 2 (general I/O) |
| Broche 109 | PL3 — Port L bit 3 (general I/O) |
| Broche 110 | PL4 — Port L bit 4 (general I/O) |
| Broche 111 | PL5 — Port L bit 5 (general I/O) |
| Broche 112 | PL6 — Port L bit 6 (general I/O) |
| Broche 113 | PL7 — Port L bit 7 (general I/O) |
| Broche 114 | PM0 — Port M bit 0 (general I/O) |
| Broche 115 | PM1 — Port M bit 1 (general I/O) |
| Broche 116 | PM2 — Port M bit 2 (general I/O) |
| Broche 117 | PM3 — Port M bit 3 (general I/O) |
| Broche 118 | PM4 — Port M bit 4 (general I/O) |
| Broche 119 | PM5 — Port M bit 5 (general I/O) |
| Broche 120 | PM6 — Port M bit 6 (general I/O) |
| Broche 121 | PM7 — Port M bit 7 (general I/O) |
| Broche 122 | PP0 — Port P bit 0 (PWM / timer) |
| Broche 123 | PP1 — Port P bit 1 (PWM / timer) |
| Broche 124 | PP2 — Port P bit 2 (PWM / timer) |
| Broche 125 | PP3 — Port P bit 3 (PWM / timer) |
| Broche 126 | PP4 — Port P bit 4 (PWM / timer) |
| Broche 127 | PP5 — Port P bit 5 (PWM / timer) |
| Broche 128 | PP6 — Port P bit 6 (PWM / timer) |
| Broche 129 | PP7 — Port P bit 7 (PWM / timer) |
| Broche 130 | PS0 — Port S bit 0 (general I/O) |
| Broche 131 | PS1 — Port S bit 1 (general I/O) |
| Broche 132 | PS2 — Port S bit 2 (general I/O) |
| Broche 133 | PS3 — Port S bit 3 (general I/O) |
| Broche 134 | PS4 — Port S bit 4 (general I/O) |
| Broche 135 | PS5 — Port S bit 5 (general I/O) |
| Broche 136 | PS6 — Port S bit 6 (general I/O) |
| Broche 137 | PS7 — Port S bit 7 (general I/O) |
| Broche 138 | VDD — Digital supply input |
| Broche 139 | VSS — Digital ground |
| Broche 140 | PT0 — Port T bit 0 (general I/O) |
| Broche 141 | PT1 — Port T bit 1 (general I/O) |
| Broche 142 | PT2 — Port T bit 2 (general I/O) |
| Broche 143 | PT3 — Port T bit 3 (general I/O) |
| Broche 144 | PT4 — Port T bit 4 (general I/O) |
Applications typiques
MC9S12XET256CAG convient pour 6 applications: Automotive Body Control Module, CAN Gateway / Bridge Module, Industrial PLC I/O Expander, Sensor Fusion Front-End, BLDC Motor / Fan Controller, Off-Road Vehicle Telematics.
Automotive Body Control Module
The MC9S12XET256CAG suits body controllers because four independent CAN 2.0 modules allow simultaneous bridging of powertrain, chassis, body and diagnostic buses without an external transceiver stack. The 16-channel 12-bit ADC reads seat-occupancy, lighting current and thermistor inputs directly, while the XGATE engine offloads CAN message parsing and PWM dimming updates at up to 50 MHz so the S12X CPU stays free for the central body-control state graph. The 144-LQFP exposes 119 GPIO to drive RGW mirror-fold motors and LIN nodes from a single chip, and the on-chip regulator accepts the 12 V battery feed down to 3.13 V without an external 5 V LDO. AEC-Q-style validation flows are common on this family in production.
Recommandé
CAN Gateway / Bridge Module
The four MSCAN controllers on the MC9S12XET256CAG make it a natural choice for in-vehicle network gateways that must route messages between CAN buses running at different baud rates and protocols. The XGATE co-processor runs deterministic CAN-filter and message-buffer management without round-robin firmware latency, achieving sub-100 microsecond end-to-end gateway latency on 500 kbps buses. 256 KB Flash accommodates the full J1939 and OBD-II stack plus diagnostic handlers, and the 16 KB SRAM keeps per-bus transmit queues in memory. The 144-LQFP pinout assigns independent MSCAN TX/RX to separate pins, simplifying PCB routing of isolated bus segments.
Recommandé
Industrial PLC I/O Expander
As an industrial PLC expansion module, the MC9S12XET256CAG digitises up to 16 analogue inputs through its 12-bit ADC at throughputs sufficient for 4-20 mA loop monitoring, while the S12X CPU runs ladder-logic or IEC 61131-3 runtimes in 256 KB Flash. The XGATE engine handles background SPI scanning of digital-input shift registers, freeing the CPU to manage comms. Industrial designs benefit from the wide 3.13-5.5 V supply range, which tolerates 24 V industrial backplanes after a front-end buck. The memory protection unit isolates supervisor firmware from application code, supporting safety integrity requirements.
Recommandé
Sensor Fusion Front-End
The MC9S12XET256CAG acts as a sensor-fusion front-end by sampling six-axis IMU and pressure-sensor data over SPI at the XGATE-engine bandwidth, while the S12X CPU runs a complementary filter or Kalman estimator. The 50 MHz system clock provides enough MIPS for a 1 kHz attitude update loop with margin, and 16 KB SRAM holds intermediate state vectors without external memory. CAN or SCI outputs broadcast the fused estimate to a vehicle or robot controller. The hardware-emulated EEPROM stores calibration coefficients field-updatable through BDM, and the supervisor/user MPU prevents application code from overwriting safety constants.
Recommandé
BLDC Motor / Fan Controller
Driving small BLDC pumps, fans and blowers, the MC9S12XET256CAG combines a 16-channel 12-bit ADC for back-EMF sensing, PWM timers for complementary three-phase outputs, and the XGATE engine for field-oriented-control loop closure at 20 kHz PWM without starving the CPU of commutation time. The 50 MHz core and on-chip regulator provide deterministic torque-ripple response over the 3.13-5.5 V input range typical of 12 V battery-fed automotive pumps. 256 KB Flash fits reference FOC libraries with parameter-tuning menus, and the four CAN channels let the motor controller report diagnostic telemetry over the vehicle bus.
Recommandé
Off-Road Vehicle Telematics
For telematics control units on agricultural, construction and off-road vehicles, the MC9S12XET256CAG provides four CAN buses (engine, body, implement, diagnostics) plus LIN master capability for sensor attachments, all managed from 256 KB Flash. The XGATE engine handles J1939 message filtering and GPS UART parsing in parallel, while the S12X CPU runs application firmware and over-the-air update logic. 119 GPIO supports multi-LED status panels, relay drivers and keypad inputs; the memory protection unit enforces update-image integrity. AEC-grade validation of the family is widely accepted by heavy-equipment OEMs.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC9S12XET256CAG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC9S12XEQ384CAG | MC9S12XDT512CAG | MC9S12XEP768CAG | MC9S12XET256CAG | MC9S12XET256MAG |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) |
| Core | S12X + XGATE | S12X + XGATE | S12XD + XGATE | S12XE + XGATE | S12X + XGATE | S12X + XGATE |
| Flash | 256 KB | 384 KB (+50%) | 512 KB (+100%) | 768 KB (+200%) | 256 KB (same) | 256 KB (same) |
| RAM | 16 KB | 32 KB | 32 KB | 48 KB | 16 KB | 16 KB |
| EEPROM (emulated) | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Maximum Clock | 50 MHz | 50 MHz | 40 MHz | 50 MHz | 50 MHz | 50 MHz |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (automotive) | -40 C to +85 C | -40 C to +125 C (automotive) |
| CAN Modules | 4 | 4 | 5 | 5 | 4 | 4 |
Principaux différenciateurs
- XGATE peripheral co-processor runs at full 50 MHz (vs MC9S12A256CPVE (older S12A family))
- Same-package Flash upgrade path to 384 KB and 768 KB (vs MC9S12XEQ384CAG (same 144-LQFP, +50% Flash))
- Four independent MSCAN modules in a 16-bit MCU (vs MC9S12XDP512MAG (5 MSCAN but 512 KB Flash))
Notes de conception
BKGD and MODC pins must be reserved for Background Debug Mode and cannot be used as general-purpose I/O without losing in-circuit debug capability. Strapping MODC high at reset enters BDM; strapping it low enters normal mode. Place a 4.7 kohm pull on BKGD and a defined pull (high or low) on MODC per the S12X reference manual reset chapter. Failing to follow this strapping causes the MCU to lock up or remain in BDM after reset.
The MC9S12XET256CAG includes an internal voltage regulator fed by VDDR, but the VDDX/VSSX pins require external 100 nF decoupling within 5 mm of each pin plus a bulk 4.7 uF on VDDR. Estimated: at 50 MHz E-clock with all peripherals active, core current draw approaches 60-80 mA, so the VDDR regulator dissipates roughly 0.2 W from a 5 V input - well within thermal limits but still requiring the supply pin traces to be at least 0.5 mm wide.
Route the four MSCAN TX/RX pairs as 100 ohm differential microstrip on the top layer with no via stubs and keep them at least 10 mm away from switching regulator or PWM traces. Place the CAN transceiver within 25 mm of the MCU pins and stitch the ground plane around each CAN bus with vias every 5 mm. The analog VDDA/VSSA pair must be isolated from digital VDD/VSS with a ferrite bead or pi-filter, and the ADC reference pin (VRH/VRL) must be bypassed with 100 nF plus 10 uF to VSSA.
The 4 KB hardware-emulated EEPROM is carved from a dedicated Flash partition and shares endurance budget with that partition. Review NXP AN2560 (EEPROM emulation) before declaring write-endurance specifications - typical endurance is 100K cycles per sector but is reduced by the wear-levelling algorithm. Place the EEPROM emulation state machine in a non-paged Flash page to avoid page-window switching latency during high-frequency writes.
Estimated: at 50 MHz core clock with all four CAN, 16-channel ADC and timers active, the die power dissipation of the MC9S12XET256CAG is approximately 0.3-0.4 W. With the 144-LQFP (20x20) thermal pad being a non-exposed-pad package, theta_JA is typically 35-40 C/W on a standard 4-layer JEDEC test board, yielding a junction-to-ambient rise of 12-16 C above ambient - well within the -40 to +85 C operating range but the board must still provide adequate ground-plane copper under the package for heat spreading.
Informations de conformité
Standard MC9S12XET256CAG is commercial-grade; choose the MAG/AEG/VAG suffix for AEC-Q100 automotive qualification.
