MC9S12XET256CAG - 16-bit 256KB Flash S12X MCU | NXP
N.º da peça: MC9S12XET256CAG ✓ Ativo| Qtd. | Preço unitário | 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 Visão geral
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.
Alternativas drop-in para MC9S12XET256CAG — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MC9S12XET256CAG (mesmo formato e footprint) — diferindo em Operating Temperature, Core, Core Processor, Supply Voltage, Package.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC9S12XEQ384CAG
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
Consulte o preço
Ver ficha técnica →MC9S12XDT512CAG
✅ Drop-In✓ Em estoque
$85 / unidade
Ver ficha técnica →MC9S12XEP768CAG
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$19.85 / unidade
Ver ficha técnica →MC9S12XET256CAG
✅ Drop-In✓ Em estoque
$10.55 / unidade
Ver ficha técnica →MC9S12XET256MAG
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC9S12XET256CAG Classificações máximas e características elétricas
| Core | S12X (16-bit CISC) + XGATE co-processor |
| CPU Architecture | 16-bit HCS12X |
| Frequência máxima de clock | 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 |
| Encapsulamento | 144-LQFP (20x20 mm) |
| Tensão de alimentação | 3.13 V to 5.5 V (single 5 V supply with on-chip regulator) |
| Temperatura de operação | -40 C to +85 C (CAG grade, see datasheet) |
| Tipo de montagem | Surface Mount |
| Nível MSL | 3 (per JEDEC J-STD-020) |
| Status RoHS | Compliant |
| Debug Interface | BDM (Background Debug Mode) |
| Memory Protection Unit | Yes (supervisor/user modes) |
Configuração de pinos do MC9S12XET256CAG
| Pino 1 | BKGD — Background Debug Mode pin for in-circuit debug |
| Pino 2 | MODC — Mode control pin (used with BKGD for BDM entry) |
| Pino 3 | RESET — Active-low reset input |
| Pino 4 | VDDR — Regulated voltage supply for internal logic |
| Pino 5 | VDDA — Analog supply for ADC |
| Pino 6 | VSSA — Analog ground for ADC |
| Pino 7 | VSS — Digital ground |
| Pino 8 | PAD00 — General-purpose I/O / ADC channel 0 |
| Pino 9 | PAD01 — General-purpose I/O / ADC channel 1 |
| Pino 10 | PAD02 — General-purpose I/O / ADC channel 2 |
| Pino 11 | PAD03 — General-purpose I/O / ADC channel 3 |
| Pino 12 | PAD04 — General-purpose I/O / ADC channel 4 |
| Pino 13 | PAD05 — General-purpose I/O / ADC channel 5 |
| Pino 14 | PAD06 — General-purpose I/O / ADC channel 6 |
| Pino 15 | PAD07 — General-purpose I/O / ADC channel 7 |
| Pino 16 | PAD08 — General-purpose I/O / ADC channel 8 |
| Pino 17 | PAD09 — General-purpose I/O / ADC channel 9 |
| Pino 18 | PAD10 — General-purpose I/O / ADC channel 10 |
| Pino 19 | PAD11 — General-purpose I/O / ADC channel 11 |
| Pino 20 | PAD12 — General-purpose I/O / ADC channel 12 |
| Pino 21 | PAD13 — General-purpose I/O / ADC channel 13 |
| Pino 22 | PAD14 — General-purpose I/O / ADC channel 14 |
| Pino 23 | PAD15 — General-purpose I/O / ADC channel 15 |
| Pino 24 | PA0 — Port A bit 0 (general I/O) |
| Pino 25 | PA1 — Port A bit 1 (general I/O) |
| Pino 26 | PA2 — Port A bit 2 (general I/O) |
| Pino 27 | PA3 — Port A bit 3 (general I/O) |
| Pino 28 | PA4 — Port A bit 4 (general I/O) |
| Pino 29 | PA5 — Port A bit 5 (general I/O) |
| Pino 30 | PA6 — Port A bit 6 (general I/O) |
| Pino 31 | PA7 — Port A bit 7 (general I/O) |
| Pino 32 | PB0 — Port B bit 0 (general I/O) |
| Pino 33 | PB1 — Port B bit 1 (general I/O) |
| Pino 34 | PB2 — Port B bit 2 (general I/O) |
| Pino 35 | PB3 — Port B bit 3 (general I/O) |
| Pino 36 | PB4 — Port B bit 4 (general I/O) |
| Pino 37 | PB5 — Port B bit 5 (general I/O) |
| Pino 38 | PB6 — Port B bit 6 (general I/O) |
| Pino 39 | PB7 — Port B bit 7 (general I/O) |
| Pino 40 | PC0 — Port C bit 0 / CAN0 TX |
| Pino 41 | PC1 — Port C bit 1 / CAN0 RX |
| Pino 42 | PC2 — Port C bit 2 / CAN1 TX |
| Pino 43 | PC3 — Port C bit 3 / CAN1 RX |
| Pino 44 | PC4 — Port C bit 4 / CAN2 TX |
| Pino 45 | PC5 — Port C bit 5 / CAN2 RX |
| Pino 46 | PC6 — Port C bit 6 / CAN3 TX |
| Pino 47 | PC7 — Port C bit 7 / CAN3 RX |
| Pino 48 | VDD — Digital supply input |
| Pino 49 | VSS — Digital ground |
| Pino 50 | PD0 — Port D bit 0 (SPI / SCI) |
| Pino 51 | PD1 — Port D bit 1 (SPI / SCI) |
| Pino 52 | PD2 — Port D bit 2 (SPI / SCI) |
| Pino 53 | PD3 — Port D bit 3 (SPI / SCI) |
| Pino 54 | PD4 — Port D bit 4 (SPI / SCI) |
| Pino 55 | PD5 — Port D bit 5 (SPI / SCI) |
| Pino 56 | PD6 — Port D bit 6 (SPI / SCI) |
| Pino 57 | PD7 — Port D bit 7 (SPI / SCI) |
| Pino 58 | PE0 — Port E bit 0 (PWM / timer) |
| Pino 59 | PE1 — Port E bit 1 (PWM / timer) |
| Pino 60 | PE2 — Port E bit 2 (PWM / timer) |
| Pino 61 | PE3 — Port E bit 3 (PWM / timer) |
| Pino 62 | PE4 — Port E bit 4 (PWM / timer) |
| Pino 63 | PE5 — Port E bit 5 (PWM / timer) |
| Pino 64 | PE6 — Port E bit 6 (PWM / timer) |
| Pino 65 | PE7 — Port E bit 7 (PWM / timer) |
| Pino 66 | PF0 — Port F bit 0 (general I/O) |
| Pino 67 | PF1 — Port F bit 1 (general I/O) |
| Pino 68 | PF2 — Port F bit 2 (general I/O) |
| Pino 69 | PF3 — Port F bit 3 (general I/O) |
| Pino 70 | PF4 — Port F bit 4 (general I/O) |
| Pino 71 | PF5 — Port F bit 5 (general I/O) |
| Pino 72 | PF6 — Port F bit 6 (general I/O) |
| Pino 73 | PF7 — Port F bit 7 (general I/O) |
| Pino 74 | PG0 — Port G bit 0 (general I/O) |
| Pino 75 | PG1 — Port G bit 1 (general I/O) |
| Pino 76 | PG2 — Port G bit 2 (general I/O) |
| Pino 77 | PG3 — Port G bit 3 (general I/O) |
| Pino 78 | PG4 — Port G bit 4 (general I/O) |
| Pino 79 | PG5 — Port G bit 5 (general I/O) |
| Pino 80 | PG6 — Port G bit 6 (general I/O) |
| Pino 81 | PG7 — Port G bit 7 (general I/O) |
| Pino 82 | PH0 — Port H bit 0 (general I/O) |
| Pino 83 | PH1 — Port H bit 1 (general I/O) |
| Pino 84 | PH2 — Port H bit 2 (general I/O) |
| Pino 85 | PH3 — Port H bit 3 (general I/O) |
| Pino 86 | PH4 — Port H bit 4 (general I/O) |
| Pino 87 | PH5 — Port H bit 5 (general I/O) |
| Pino 88 | PH6 — Port H bit 6 (general I/O) |
| Pino 89 | PH7 — Port H bit 7 (general I/O) |
| Pino 90 | PJ0 — Port J bit 0 (general I/O) |
| Pino 91 | PJ1 — Port J bit 1 (general I/O) |
| Pino 92 | PJ2 — Port J bit 2 (general I/O) |
| Pino 93 | PJ3 — Port J bit 3 (general I/O) |
| Pino 94 | PJ4 — Port J bit 4 (general I/O) |
| Pino 95 | PJ5 — Port J bit 5 (general I/O) |
| Pino 96 | PJ6 — Port J bit 6 (general I/O) |
| Pino 97 | PJ7 — Port J bit 7 (general I/O) |
| Pino 98 | PK0 — Port K bit 0 (general I/O) |
| Pino 99 | PK1 — Port K bit 1 (general I/O) |
| Pino 100 | PK2 — Port K bit 2 (general I/O) |
| Pino 101 | PK3 — Port K bit 3 (general I/O) |
| Pino 102 | PK4 — Port K bit 4 (general I/O) |
| Pino 103 | PK5 — Port K bit 5 (general I/O) |
| Pino 104 | PK6 — Port K bit 6 (general I/O) |
| Pino 105 | PK7 — Port K bit 7 (general I/O) |
| Pino 106 | PL0 — Port L bit 0 (general I/O) |
| Pino 107 | PL1 — Port L bit 1 (general I/O) |
| Pino 108 | PL2 — Port L bit 2 (general I/O) |
| Pino 109 | PL3 — Port L bit 3 (general I/O) |
| Pino 110 | PL4 — Port L bit 4 (general I/O) |
| Pino 111 | PL5 — Port L bit 5 (general I/O) |
| Pino 112 | PL6 — Port L bit 6 (general I/O) |
| Pino 113 | PL7 — Port L bit 7 (general I/O) |
| Pino 114 | PM0 — Port M bit 0 (general I/O) |
| Pino 115 | PM1 — Port M bit 1 (general I/O) |
| Pino 116 | PM2 — Port M bit 2 (general I/O) |
| Pino 117 | PM3 — Port M bit 3 (general I/O) |
| Pino 118 | PM4 — Port M bit 4 (general I/O) |
| Pino 119 | PM5 — Port M bit 5 (general I/O) |
| Pino 120 | PM6 — Port M bit 6 (general I/O) |
| Pino 121 | PM7 — Port M bit 7 (general I/O) |
| Pino 122 | PP0 — Port P bit 0 (PWM / timer) |
| Pino 123 | PP1 — Port P bit 1 (PWM / timer) |
| Pino 124 | PP2 — Port P bit 2 (PWM / timer) |
| Pino 125 | PP3 — Port P bit 3 (PWM / timer) |
| Pino 126 | PP4 — Port P bit 4 (PWM / timer) |
| Pino 127 | PP5 — Port P bit 5 (PWM / timer) |
| Pino 128 | PP6 — Port P bit 6 (PWM / timer) |
| Pino 129 | PP7 — Port P bit 7 (PWM / timer) |
| Pino 130 | PS0 — Port S bit 0 (general I/O) |
| Pino 131 | PS1 — Port S bit 1 (general I/O) |
| Pino 132 | PS2 — Port S bit 2 (general I/O) |
| Pino 133 | PS3 — Port S bit 3 (general I/O) |
| Pino 134 | PS4 — Port S bit 4 (general I/O) |
| Pino 135 | PS5 — Port S bit 5 (general I/O) |
| Pino 136 | PS6 — Port S bit 6 (general I/O) |
| Pino 137 | PS7 — Port S bit 7 (general I/O) |
| Pino 138 | VDD — Digital supply input |
| Pino 139 | VSS — Digital ground |
| Pino 140 | PT0 — Port T bit 0 (general I/O) |
| Pino 141 | PT1 — Port T bit 1 (general I/O) |
| Pino 142 | PT2 — Port T bit 2 (general I/O) |
| Pino 143 | PT3 — Port T bit 3 (general I/O) |
| Pino 144 | PT4 — Port T bit 4 (general I/O) |
Aplicações típicas
MC9S12XET256CAG é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC9S12XET256CAG — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- 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))
Notas de projeto
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.
Informações de conformidade
Standard MC9S12XET256CAG is commercial-grade; choose the MAG/AEG/VAG suffix for AEC-Q100 automotive qualification.
