MC9S12XDT256MAG - 16-bit HCS12X MCU 256KB Flash 144-LQFP | NXP
Référence : MC9S12XDT256MAG ⚠ Dernier achat| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.8 | $168,00 |
| 100 | $14.95 | $1 495,00 |
| 500 | $12.4 | $6 200,00 |
| 1 000 | $10.65 | $10 650,00 |
MC9S12XDT256MAG Présentation
An MCU (microcontroller unit) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and programmable I/O peripherals. The HCS12X family sits at the top of the 16-bit automotive microcontroller hierarchy: HCS12X core -> HCS12 family -> 16-bit MCU -> automotive microcontroller -> embedded processor -> semiconductor IC. Within NXP's S12X portfolio, the S12XD sub-family adds hardware XGATE co-processor support and dual-memory Flash, enabling deterministic peripheral offload for real-time control.
Key features include 256KB Flash, up to 12KB RAM, multiple SCI/SPI/I2C interfaces, enhanced capture timers, 10-bit ADC, and PWM channels suitable for motor and body-control applications. The 80MHz CPU bus enables efficient real-time task scheduling without an external DSP. The device integrates a CAN 2.0 module, supporting automotive network stacks.
Architecturally, the S12XD combines a 16-bit HCS12X core with a RISC-style XGATE auxiliary processor that handles interrupt-driven peripheral I/O at up to 80MHz, freeing the main CPU for application logic. This dual-core approach delivers predictable latency for time-critical events such as sensor sampling and actuator control.
Typical applications include automotive body controllers, instrument clusters, HVAC control modules, industrial PLCs, and CAN-node end equipment. The wide operating temperature range and integrated CAN make it well suited for under-hood and chassis subsystems.
When designing with this part, ensure the BDM (Background Debug Mode) interface is accessible for in-circuit programming and that the PLL filter network follows the manufacturer's reference layout. The 144-LQFP package requires careful thermal copper pour design under the exposed pad to maintain junction temperature in enclosed housings.
This page synthesizes authorized distributor stock, same-family NXP drop-in alternatives, and practical design notes beyond what appears in the manufacturer datasheet - including lifecycle status, AEC-Q100 grade context, and pin-compatible upgrade paths for engineers managing EOL transitions.
Alternatives de remplacement direct pour MC9S12XDT256MAG — 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 MC9S12XDT256MAG (même facteur de forme et même empreinte) — différant par Package, ADC, Supply Voltage, PWM Channels, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC9S12XD256MAG
✅ Remplacement direct✓ En stock
$17.1 / unité
Voir la fiche technique →MC9S12XDT256MAL
✅ Remplacement direct✓ En stock
$15.85 / unité
Voir la fiche technique →MC9S12XDT256CAG
✅ Remplacement direct✓ En stock
$17.4 / unité
Voir la fiche technique →MC9S12XET256MAG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC9S12XDP512MAG
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MC9S12XDT256MAG Valeurs maximales et caractéristiques électriques
| Core | HCS12X (S12XD family) |
| CPU Architecture | 16-bit |
| Maximum CPU Frequency | 80 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 12 KB |
| Boîtier | 144-LQFP (20 x 20 mm) |
| Type de montage | Surface Mount |
| Tension d'alimentation | 2.35 V to 2.75 V (digital core), 4.75 V to 5.25 V (I/O) |
| Plage de température de fonctionnement | -40 C to +125 C (automotive grade) |
| ADC | 10-bit, multiple channels |
| CAN Module | Yes (CAN 2.0) |
| SCI / SPI / I2C | Multiple channels |
| PWM Channels | Yes (enhanced capture / PWM timer) |
| Debug Interface | BDM (Background Debug Mode) |
| Statut RoHS | Compliant |
| AEC-Q100 | Qualified (automotive grade) |
Configuration des broches de MC9S12XDT256MAG
| Broche 1 | VDDR — Voltage regulator supply (2.5V internal) |
| Broche 2 | VDD1 — External power supply decoupling pin |
| Broche 3 | VDD2 — External power supply decoupling pin |
| Broche 4 | VSS1 — Ground pin |
| Broche 5 | VSS2 — Ground pin |
| Broche 6 | RESET — Active-low reset input |
| Broche 7 | XFC — PLL filter capacitor connection |
| Broche 8 | BKGD — Background Debug Mode (BDM) pin |
| Broche 9 | TXD0 — SCI0 transmit data output |
| Broche 10 | RXD0 — SCI0 receive data input |
| Broche 11 | PAD0 — General purpose I/O / timer channel |
| Broche 12 | PAD1 — General purpose I/O / timer channel |
| Broche 13 | PAD2 — General purpose I/O / timer channel |
| Broche 14 | PAD3 — General purpose I/O / timer channel |
| Broche 15 | PAD4 — General purpose I/O / timer channel |
| Broche 16 | PAD5 — General purpose I/O / timer channel |
| Broche 17 | PAD6 — General purpose I/O / timer channel |
| Broche 18 | PAD7 — General purpose I/O / timer channel |
| Broche 19 | PAD8 — General purpose I/O / timer channel |
| Broche 20 | PAD9 — General purpose I/O / timer channel |
| Broche 21 | PAD10 — General purpose I/O / timer channel |
| Broche 22 | PAD11 — General purpose I/O / timer channel |
| Broche 23 | PAD12 — General purpose I/O / timer channel |
| Broche 24 | PAD13 — General purpose I/O / timer channel |
| Broche 25 | PAD14 — General purpose I/O / timer channel |
| Broche 26 | PAD15 — General purpose I/O / timer channel |
| Broche 27 | PAD16 — General purpose I/O / timer channel |
| Broche 28 | PAD17 — General purpose I/O / timer channel |
| Broche 29 | PAD18 — General purpose I/O / timer channel |
| Broche 30 | PAD19 — General purpose I/O / timer channel |
| Broche 31 | PAD20 — General purpose I/O / timer channel |
| Broche 32 | PAD21 — General purpose I/O / timer channel |
| Broche 33 | PAD22 — General purpose I/O / timer channel |
| Broche 34 | PAD23 — General purpose I/O / timer channel |
| Broche 35 | PAD24 — General purpose I/O / timer channel |
| Broche 36 | PAD25 — General purpose I/O / timer channel |
| Broche 37 | PAD26 — General purpose I/O / timer channel |
| Broche 38 | PAD27 — General purpose I/O / timer channel |
| Broche 39 | PAD28 — General purpose I/O / timer channel |
| Broche 40 | PAD29 — General purpose I/O / timer channel |
| Broche 41 | PAD30 — General purpose I/O / timer channel |
| Broche 42 | PAD31 — General purpose I/O / timer channel |
| Broche 43 | AN0 — ADC analog input channel 0 |
| Broche 44 | AN1 — ADC analog input channel 1 |
| Broche 45 | AN2 — ADC analog input channel 2 |
| Broche 46 | AN3 — ADC analog input channel 3 |
| Broche 47 | AN4 — ADC analog input channel 4 |
| Broche 48 | AN5 — ADC analog input channel 5 |
| Broche 49 | AN6 — ADC analog input channel 6 |
| Broche 50 | AN7 — ADC analog input channel 7 |
| Broche 51 | AN8 — ADC analog input channel 8 |
| Broche 52 | AN9 — ADC analog input channel 9 |
| Broche 53 | AN10 — ADC analog input channel 10 |
| Broche 54 | AN11 — ADC analog input channel 11 |
| Broche 55 | AN12 — ADC analog input channel 12 |
| Broche 56 | AN13 — ADC analog input channel 13 |
| Broche 57 | AN14 — ADC analog input channel 14 |
| Broche 58 | AN15 — ADC analog input channel 15 |
| Broche 59 | VRH — ADC high reference voltage |
| Broche 60 | VRL — ADC low reference voltage |
| Broche 61 | PS0 — Port S bit 0 (general I/O) |
| Broche 62 | PS1 — Port S bit 1 (general I/O) |
| Broche 63 | PS2 — Port S bit 2 (general I/O) |
| Broche 64 | PS3 — Port S bit 3 (general I/O) |
| Broche 65 | PS4 — Port S bit 4 (general I/O) |
| Broche 66 | PS5 — Port S bit 5 (general I/O) |
| Broche 67 | PS6 — Port S bit 6 (general I/O) |
| Broche 68 | PS7 — Port S bit 7 (general I/O) |
| Broche 69 | PT0 — Port T bit 0 (general I/O / timer) |
| Broche 70 | PT1 — Port T bit 1 (general I/O / timer) |
| Broche 71 | PT2 — Port T bit 2 (general I/O / timer) |
| Broche 72 | PT3 — Port T bit 3 (general I/O / timer) |
| Broche 73 | PT4 — Port T bit 4 (general I/O / timer) |
| Broche 74 | PT5 — Port T bit 5 (general I/O / timer) |
| Broche 75 | PT6 — Port T bit 6 (general I/O / timer) |
| Broche 76 | PT7 — Port T bit 7 (general I/O / timer) |
| Broche 77 | CANRX — CAN receive input |
| Broche 78 | CANTX — CAN transmit output |
| Broche 79 | MOSI0 — SPI0 master-out / slave-in |
| Broche 80 | MISO0 — SPI0 master-in / slave-out |
| Broche 81 | SCK0 — SPI0 serial clock |
| Broche 82 | SS0 — SPI0 slave select |
| Broche 83 | MOSI1 — SPI1 master-out / slave-in |
| Broche 84 | MISO1 — SPI1 master-in / slave-out |
| Broche 85 | SCK1 — SPI1 serial clock |
| Broche 86 | SS1 — SPI1 slave select |
| Broche 87 | SDA0 — I2C0 serial data |
| Broche 88 | SCL0 — I2C0 serial clock |
| Broche 89 | SDA1 — I2C1 serial data |
| Broche 90 | SCL1 — I2C1 serial clock |
| Broche 91 | PJ0 — Port J bit 0 (general I/O) |
| Broche 92 | PJ1 — Port J bit 1 (general I/O) |
| Broche 93 | PJ2 — Port J bit 2 (general I/O) |
| Broche 94 | PJ3 — Port J bit 3 (general I/O) |
| Broche 95 | PJ4 — Port J bit 4 (general I/O) |
| Broche 96 | PJ5 — Port J bit 5 (general I/O) |
| Broche 97 | PJ6 — Port J bit 6 (general I/O) |
| Broche 98 | PJ7 — Port J bit 7 (general I/O) |
| Broche 99 | PK0 — Port K bit 0 (general I/O) |
| Broche 100 | PK1 — Port K bit 1 (general I/O) |
| Broche 101 | PK2 — Port K bit 2 (general I/O) |
| Broche 102 | PK3 — Port K bit 3 (general I/O) |
| Broche 103 | PK4 — Port K bit 4 (general I/O) |
| Broche 104 | PK5 — Port K bit 5 (general I/O) |
| Broche 105 | PK6 — Port K bit 6 (general I/O) |
| Broche 106 | PK7 — Port K bit 7 (general I/O) |
| Broche 107 | PM0 — Port M bit 0 (general I/O) |
| Broche 108 | PM1 — Port M bit 1 (general I/O) |
| Broche 109 | PM2 — Port M bit 2 (general I/O) |
| Broche 110 | PM3 — Port M bit 3 (general I/O) |
| Broche 111 | PM4 — Port M bit 4 (general I/O) |
| Broche 112 | PM5 — Port M bit 5 (general I/O) |
| Broche 113 | PM6 — Port M bit 6 (general I/O) |
| Broche 114 | PM7 — Port M bit 7 (general I/O) |
| Broche 115 | PP0 — Port P bit 0 (PWM / general I/O) |
| Broche 116 | PP1 — Port P bit 1 (PWM / general I/O) |
| Broche 117 | PP2 — Port P bit 2 (PWM / general I/O) |
| Broche 118 | PP3 — Port P bit 3 (PWM / general I/O) |
| Broche 119 | PP4 — Port P bit 4 (PWM / general I/O) |
| Broche 120 | PP5 — Port P bit 5 (PWM / general I/O) |
| Broche 121 | PP6 — Port P bit 6 (PWM / general I/O) |
| Broche 122 | PP7 — Port P bit 7 (PWM / general I/O) |
| Broche 123 | PWM0 — PWM channel 0 output |
| Broche 124 | PWM1 — PWM channel 1 output |
| Broche 125 | TC0 — Timer/Counter channel 0 input |
| Broche 126 | TC1 — Timer/Counter channel 1 input |
| Broche 127 | TC2 — Timer/Counter channel 2 input |
| Broche 128 | TC3 — Timer/Counter channel 3 input |
| Broche 129 | TC4 — Timer/Counter channel 4 input |
| Broche 130 | TC5 — Timer/Counter channel 5 input |
| Broche 131 | TC6 — Timer/Counter channel 6 input |
| Broche 132 | TC7 — Timer/Counter channel 7 input |
| Broche 133 | VSSX — I/O ground reference |
| Broche 134 | VDDX — I/O supply voltage (5V) |
| Broche 135 | VDDPLL — PLL supply voltage |
| Broche 136 | VSSPLL — PLL ground |
| Broche 137 | EXTAL — External oscillator input |
| Broche 138 | XTAL — External oscillator output |
| Broche 139 | CLKOUT — System clock output |
| Broche 140 | MODC — Mode selection pin |
| Broche 141 | TCLK — Timer clock input |
| Broche 142 | PE0 — Port E bit 0 (general I/O / IRQ) |
| Broche 143 | PE1 — Port E bit 1 (general I/O / IRQ) |
| Broche 144 | PE2 — Port E bit 2 (general I/O / IRQ) |
Applications typiques
MC9S12XDT256MAG convient pour 6 applications: Automotive Body Control Module, HVAC Control Module, Instrument Cluster Controller, Industrial CAN Node End-Equipment, Motor Drive and PWM Control Subsystem, Sensor and Diagnostic Data Acquisition.
Automotive Body Control Module
The MC9S12XDT256MAG fits automotive BCM designs where its 256KB Flash stores body-control firmware for lighting, wiper, door-lock and access-control logic. The HCS12X core at 80MHz runs CAN 2.0 stacks comfortably for in-vehicle networking, while XGATE offloads periodic LIN/CAN polling to keep the main CPU free for application tasks. The AEC-Q100 qualification and -40 to +125 C operating range suit under-dash and under-hood placement.
Recommandé
HVAC Control Module
For HVAC climate-control modules, the MC9S12XDT256MAG drives PWM outputs to fan and actuator loads while its 10-bit ADC reads temperature and pressure sensors. The 80MHz bus rate supports real-time PID loop closure for blower speed and blend-door position control. On-chip CAN 2.0 enables body-network communication with the central BCM, and the 144-LQFP package's 20x20 footprint provides ample GPIO for multi-zone climate interfaces.
Recommandé
Instrument Cluster Controller
The MC9S12XDT256MAG is well matched to instrument cluster designs that drive segmented LCD or stepper-motor gauges via PWM and SPI-controlled driver ICs. Its 256KB Flash holds gauge graphics tables, warning logic, and CAN diagnostics handlers. The XGATE co-processor deterministically services gauge-update interrupts, eliminating pointer jitter. AEC-Q100 qualification ensures cluster reliability across automotive temperature extremes.
Recommandé
Industrial CAN Node End-Equipment
Beyond automotive, the MC9S12XDT256MAG suits industrial CANopen or DeviceNet slave nodes such as programmable logic controllers, distributed I/O blocks, and motor starters. The integrated MSCAN 2.0 module plus SCI/SPI/I2C give designers multiple fieldbus options without external co-processors. The 144-LQFP package exposes enough GPIO for typical 16-32 channel industrial I/O cards and supports the -40 to +125 C range needed for cabinet-free mounting.
Recommandé
Motor Drive and PWM Control Subsystem
The MC9S12XDT256MAG's enhanced capture and PWM timer block drives brushless DC and stepper motor control loops up to a few kHz electrical frequency. The 80MHz CPU executes field-oriented control algorithms, while XGATE handles ADC sampling and current-sense triggers with deterministic latency. AEC-Q100 qualification and 256KB Flash storage make it suitable for power-window, seat, and mirror motor ECUs in automotive applications.
Recommandé
Sensor and Diagnostic Data Acquisition
In sensor-acquisition and diagnostic logging nodes, the MC9S12XDT256MAG combines a 10-bit ADC with CAN 2.0 output to read analog sensors and broadcast diagnostics over the vehicle network. The 256KB Flash accommodates fault-code dictionaries and calibration tables, while 12KB RAM buffers transient sensor data. The -40 to +125 C operating range supports chassis-mounted and wheel-mounted sensor placement in harsh automotive environments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC9S12XDT256MAG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC9S12XD256MAG | MC9S12XDT256MAL | MC9S12XDT256CAG | MC9S12XET256MAG | MC9S12XDP512MAG |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS12X | HCS12X | HCS12X | HCS12X | HCS12X (S12XE) | HCS12X |
| Maximum CPU Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 50 MHz | 80 MHz |
| Program Memory (Flash) | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB |
| Operating Temperature | -40 to +125 C | -40 to +125 C | -40 to +85 C | 0 to +70 C | -40 to +125 C | -40 to +125 C |
| AEC-Q100 | Qualified | Qualified | Not qualified (industrial) | Not qualified (commercial) | Qualified | Qualified |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Obsolete | Active | Last Time Buy |
Principaux différenciateurs
- Last-time-buy NXP-original stock at distributors vs counterfeits on the open market (vs MC9S12XD256MAG)
- Higher CPU clock rate for time-critical CAN processing (vs MC9S12XET256MAG)
- 256KB Flash balances cost and code space vs the larger 512KB variant (vs MC9S12XDP512MAG)
Notes de conception
The MC9S12XDT256MAG requires two supply domains: VDDX (5V I/O) and the internal VDDR (2.5V core) generated by the on-chip voltage regulator. Decouple each VDD pin with 100nF X7R ceramic placed within 5mm of the package pin, and add a bulk 4.7uF tantalum or polymer cap on VDDR for PLL current spikes. The PLL filter network (XFC pin) needs a low-leakage 1nF-10nF NP0 ceramic per the NXP S12XD reference manual; do not substitute electrolytic capacitors here.
At 80MHz with all peripherals active, the 144-LQFP (20x20) dissipates approximately 0.4-0.6W in typical automotive applications. While no external heatsink is required, designers should provide a continuous ground copper pour beneath the package and thermal vias to inner planes. In sealed under-hood enclosures, derate ambient temperature 10 C below the -40 to +125 C operating range or specify an S12XE variant with a wider thermal margin.
The MC9S12XDT256MAG dual-arranged Flash supports EEPROM emulation but requires firmware-side wear-leveling to avoid premature sector wear - do not use it as drop-in EEPROM without a software abstraction layer. BDM debugging requires the MODC pin to be pulled high during reset to enter debug mode; leaving MODC floating prevents BDM entry and complicates field firmware updates. Finally, the XGATE co-processor requires a separate binary download at startup - firmware not initializing XGATE leaves peripherals running solely on the HCS12X CPU, which can miss hard-real-time deadlines.
Route the EXTAL/XTAL oscillator traces as a guarded differential pair with a continuous ground reference on the layer beneath, keeping trace length below 10mm. Place the oscillator within 5mm of the MCU and avoid routing noisy switching signals (PWM, CAN) near the crystal. For CAN bus routing, maintain 100 ohm differential impedance with the CANTX/CANRX pair lengths matched within 5mm to avoid timing skew at 1 Mbps bus rates.
Informations de conformité
AEC-Q100 qualified per NXP automotive grade. RoHS and REACH compliant per distributor listings. Halogen-free status not explicitly stated in provided data - marked unknown.