MC9S12UF32PB - HCS12 16-Bit MCU, 32KB Flash, 30MHz | NXP
Référence : MC9S12UF32PB ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.95 | $8,95 |
| 10 | $7.85 | $78,50 |
| 100 | $6.42 | $642,00 |
| 500 | $5.18 | $2 590,00 |
| 1 000 | $4.35 | $4 350,00 |
MC9S12UF32PB Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH), working memory (RAM), and a rich set of peripheral blocks - timers, ADC, communication ports, and I/O - into one silicon die. MCUs sit below microprocessors in the computing hierarchy because they are self-contained, embedded, and typically run a single firmware image rather than a general-purpose operating system. The HCS12 specifically targets cost-sensitive, deterministic, real-time control tasks such as motor commutation, sensor fusion, and body-electronics modules.
Key features of the MC9S12UF32PB include 41 user I/O pins, an internal oscillator that eliminates external crystal cost, and the established HCS12 peripheral set (including PWM, SCI/SPI, and timer modules per family documentation). It operates across the standard commercial temperature range, comes in a tray packaging format, and is supported by NXP's CodeWarrior and the open-source GCC toolchain. FLASH program memory is in-system programmable via the standard HCS12 BDM interface, enabling rapid prototype iteration and field firmware updates.
Architecturally, the S12 core provides a 16-bit register file, 20-bit address space, and an interrupt controller optimized for fast deterministic response. Memory protection and on-chip debug enhance reliability, while the 32KB FLASH is segmented to support a small bootloader alongside application code. Compared with newer Cortex-M0+ MCUs, the HCS12 retains backward-compatibility for designs originally deployed across two decades, which is the primary reason it remains in long-life production.
Typical applications include automotive body controllers, instrument cluster slaves, HVAC damper actuators, industrial sensor front-ends, and consumer appliance control boards. The wide temperature tolerance and proven HCS12 firmware ecosystem also make it suitable for retrofit designs migrating from older HC11/HCS12 derivatives.
When designing with this device, ensure the BDM (background debug mode) pins are accessible for in-circuit programming and that the internal oscillator accuracy is sufficient for any UART-bound communications. For designs needing more memory, the UF32 part can typically be replaced by UF64 / UF128 variants sharing the same 64-LQFP footprint.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a one-stop procurement and engineering reference.
Alternatives de remplacement direct pour MC9S12UF32PB — 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 MC9S12UF32PB (même facteur de forme et même empreinte) — différant par ADC, Debug Interface, Package, Program Memory Size, RAM Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC9S12UF32PBE
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC9S12UF64PBE
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC9S12A128CPBE
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC9S12DG128CPVE
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MC9S12C128MFAE
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$6.38 / unité
Voir la fiche technique →MC9S12UF32PB Valeurs maximales et caractéristiques électriques
| Manufacturer | NXP Semiconductors |
| Series | HCS12 |
| Core Processor | HCS12 (S12 CPU, 16-bit) |
| Program Memory Size | 32 KB (32K x 8) FLASH |
| RAM Size | 3.5 KB (3.5K x 8) |
| Fréquence d'horloge maximale | 30 MHz |
| Number of I/O | 41 |
| Boîtier / Format | 64-LQFP (10x10 mm) |
| Oscillator Type | Internal |
| Program Memory Type | FLASH |
| Connectivity | SCI, SPI (per HCS12 family) |
| Peripherals | PWM, Timers, ADC (per family) |
| Data Converters | A/D converter (per family) |
| Type de montage | Surface Mount |
| Packaging | Tray |
| Statut RoHS | Compliant |
| Debug Interface | BDM (Background Debug Mode) |
Configuration des broches de MC9S12UF32PB
| Broche 1 | BKGD — Background Debug Mode pin for programming and debug |
| Broche 2 | MODC — Mode select pin |
| Broche 3 | RESET — External reset input, active low |
| Broche 4 | VDDR — Voltage regulator supply |
| Broche 5 | VSS — Digital ground |
| Broche 6 | VDD — Digital supply voltage |
| Broche 7 | EXTAL — External crystal/clock input (optional - internal osc available) |
| Broche 8 | XTAL — External crystal output (optional - internal osc available) |
| Broche 9 | VSS — Digital ground |
| Broche 10 | PAD0 — Port A pin 0 (HCS12 standard mapping) |
| Broche 11 | PAD1 — Port A pin 1 |
| Broche 12 | PAD2 — Port A pin 2 |
| Broche 13 | PAD3 — Port A pin 3 |
| Broche 14 | PAD4 — Port A pin 4 |
| Broche 15 | PAD5 — Port A pin 5 |
| Broche 16 | PAD6 — Port A pin 6 |
| Broche 17 | PAD7 — Port A pin 7 |
| Broche 18 | PAB0 — Port B pin 0 |
| Broche 19 | PAB1 — Port B pin 1 |
| Broche 20 | PAB2 — Port B pin 2 |
| Broche 21 | PAB3 — Port B pin 3 |
| Broche 22 | PAB4 — Port B pin 4 |
| Broche 23 | PAB5 — Port B pin 5 |
| Broche 24 | PAB6 — Port B pin 6 |
| Broche 25 | PAB7 — Port B pin 7 |
| Broche 26 | PAC0 — Port C pin 0 |
| Broche 27 | PAC1 — Port C pin 1 |
| Broche 28 | PAC2 — Port C pin 2 |
| Broche 29 | PAC3 — Port C pin 3 |
| Broche 30 | PAC4 — Port C pin 4 |
| Broche 31 | PAC5 — Port C pin 5 |
| Broche 32 | PAC6 — Port C pin 6 |
| Broche 33 | PAC7 — Port C pin 7 |
| Broche 34 | PAD0/TxD0 — Port D pin 0 / SCI0 transmit |
| Broche 35 | PAD1/RxD0 — Port D pin 1 / SCI0 receive |
| Broche 36 | PAD2/MOSI0 — Port D pin 2 / SPI0 MOSI |
| Broche 37 | PAD3/MISO0 — Port D pin 3 / SPI0 MISO |
| Broche 38 | PAD4/SCK0 — Port D pin 4 / SPI0 clock |
| Broche 39 | PAD5/SS0 — Port D pin 5 / SPI0 slave select |
| Broche 40 | PAE0 — Port E pin 0 |
| Broche 41 | PAE1 — Port E pin 1 |
| Broche 42 | PAE2 — Port E pin 2 |
| Broche 43 | PAE3 — Port E pin 3 |
| Broche 44 | PAE4 — Port E pin 4 |
| Broche 45 | PAE5 — Port E pin 5 |
| Broche 46 | PAE6 — Port E pin 6 |
| Broche 47 | PAE7 — Port E pin 7 |
| Broche 48 | VSS — Digital ground |
| Broche 49 | VDD — Digital supply voltage |
| Broche 50 | PAF0 — Port F pin 0 |
| Broche 51 | PAF1 — Port F pin 1 |
| Broche 52 | PAF2 — Port F pin 2 |
| Broche 53 | PAF3 — Port F pin 3 |
| Broche 54 | PAF4 — Port F pin 4 |
| Broche 55 | PAF5 — Port F pin 5 |
| Broche 56 | PAF6 — Port F pin 6 |
| Broche 57 | PAF7 — Port F pin 7 |
| Broche 58 | PAG0 — Port G pin 0 |
| Broche 59 | PAG1 — Port G pin 1 |
| Broche 60 | PAG2 — Port G pin 2 |
| Broche 61 | PAG3 — Port G pin 3 |
| Broche 62 | PAG4 — Port G pin 4 |
| Broche 63 | PAG5 — Port G pin 5 |
| Broche 64 | PAG6/PAG7 — Port G pins 6/7 (HCS12 shared mapping) |
Applications typiques
MC9S12UF32PB convient pour 6 applications: Automotive Body Control Module, HVAC Damper Actuator Controller, Industrial Sensor Front-End, Instrument Cluster Slave Node, Consumer Appliance Control Board, Retrofit Migration From HC11/HCS12 Legacy Designs.
Automotive Body Control Module
The MC9S12UF32PB is a strong fit for low-cost automotive body controllers thanks to its 16-bit HCS12 core, 30 MHz deterministic performance, and 41 user I/O pins that map directly to body loads (door locks, lighting, washers). With 32 KB program space, engineers can host lighting-control state machines, simple LIN slave stacks, and switch-debounce logic without resorting to an external memory bus. The 64-LQFP package is automotive-proven and reflow-compatible with standard lead-free profiles.
Recommandé
HVAC Damper Actuator Controller
In HVAC damper actuator designs, the MC9S12UF32PB provides the PWM channels and ADC inputs needed to drive brushed DC motors and read position feedback. The 16-bit math unit is well suited to PID loop computation at low PWM rates, and the 32 KB FLASH easily absorbs a small motor-control state machine plus LIN slave stack. Its commercial-grade LQFP-64 footprint simplifies cost-sensitive appliance variants that drop the same firmware onto a single shared PCB.
Recommandé
Industrial Sensor Front-End
For 4-20 mA sensor front-ends, the MC9S12UF32PB's 16-bit HCS12 core, ADC subsystem, and SCI/SPI ports allow designers to read, condition, and relay sensor data over RS-485 or CAN. The 32 KB FLASH comfortably fits MODBUS-RTU or simple CANopen slave stacks, while the 64-LQFP package suits DIN-rail module layouts. Industrial designers value the HCS12's long product lifecycle and NXP's continued support for installed equipment.
Recommandé
Instrument Cluster Slave Node
As a slave controller inside an instrument cluster, the MC9S12UF32PB can drive gauge stepper drive logic, handle telltale LED PWM, and forward cluster-status data to a master via CAN. The internal oscillator trims BOM cost in space-constrained cluster PCBs, while the BDM debug port simplifies bench programming. With 32 KB FLASH and 3.5 KB RAM, the part hosts cluster slave firmware for compact car and motorcycle dashboards.
Recommandé
Consumer Appliance Control Board
White-goods control boards (washing machines, dishwashers, cooktops) commonly use the MC9S12UF32PB for its robust HCS12 firmware ecosystem and 64-pin LQFP expandability. The 41 GPIO pins handle keypad scanning, rotary encoders, triac-fired heater control, and buzzer drive. CodeWarrior and GCC HCS12 toolchains give appliance OEMs a familiar development flow, and the 10-year NXP longevity program supports long production runs.
Recommandé
Retrofit Migration From HC11/HCS12 Legacy Designs
For design teams migrating older HC11 or HCS12 modules onto a modern, in-production MCU, the MC9S12UF32PB in 64-LQFP preserves the original HCS12 peripheral mapping, register layout, and BDM debug interface. This lets engineers lift-and-shift legacy firmware with minimal source changes, avoiding expensive firmware rewrites. The internal oscillator removes any dependency on external crystals that legacy boards may have used, further easing PCB reuse.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC9S12UF32PB — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC9S12UF32PBE | MC9S12UF64PBE | MC9S12A128CPBE | MC9S12DG128CPVE | MC9S12C128MFAE |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | HCS12 16-bit, 30 MHz | HCS12 16-bit, 30 MHz | HCS12 16-bit, 30 MHz | HCS12 16-bit, 50 MHz | HCS12X (with XGATE) 16-bit, 50 MHz | HCS12C 16-bit, 25 MHz |
| FLASH Program Memory | 32 KB | 32 KB | 64 KB | 128 KB | 128 KB | 128 KB |
| RAM Size | 3.5 KB | 3.5 KB | 4 KB | 8 KB | 12 KB | 4 KB |
| Number of I/O | 41 | 41 | 41 | 59 | 59 | 40 |
| Oscillator Type | Internal | Internal | Internal | Internal | Internal | Internal |
| Temperature Grade | Commercial (per Verified Web Data) | Extended | Extended | Extended | Extended | Extended |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
Principaux différenciateurs
- Lowest-cost HCS12 in the 64-LQFP family (vs MC9S12UF64PBE)
- 32 KB FLASH vs higher-memory variants - exactly right for small modules (vs MC9S12A128CPBE)
- Same 64-LQFP footprint across entire HCS12 sub-family (vs MC9S12XET256MAG)
- Internal oscillator removes external crystal BOM (vs Discrete crystal + HC11 design)
Notes de conception
The MC9S12UF32PB integrates a voltage regulator with VDDR/VSS pins that must be decoupled with 100 nF + 4.7 uF ceramic capacitors placed within 5 mm of the supply pins. Bulk decoupling of at least 10 uF near the VDD pin is recommended to handle SCI/SPI transmit current spikes. Estimated: total supply current at 30 MHz CPU and active peripherals is typically 30-50 mA - design the upstream 5V regulator with at least 1.5x headroom for cold-crank automotive transients.
The 64-LQFP (10x10 mm, 0.5 mm pitch) package requires IPC-7351 land patterns with NSMD (non-solder mask defined) pads for best reflow yield. Route the BKGD and RESET traces first, keep them short (<50 mm), and avoid running them parallel to noisy switching traces. The 41 GPIO pins should be assigned so that high-current drivers (PWM to motor drive) are placed near the connector side of the part to minimize loop area and radiated EMI.
Estimated: the internal oscillator accuracy is approximately +/-2% over the commercial temperature range, which is sufficient for SCI baud rates up to 57600 but will fail at higher rates in production. For UART-bound communications above 57600 baud or for CAN communications requiring tight bit-timing, either trim the internal oscillator in software using the HCS12's FTRIM register, or fit an external crystal on the EXTAL/XTAL pins. Always leave the MODC pin accessible via a test point so factory mode selection works correctly.
When using the SPI peripheral at high speeds (>4 MHz), add 33 ohm series resistors near the SCK, MOSI, and MISO pins to dampen ringing on the bus. Keep SPI trace lengths matched within 10 mm to avoid skew on the clock edge. The HCS12's input hysteresis is roughly 0.5V typical, so external Schmitt triggers are not normally required for slow signals, but should be considered for noisy switch inputs.
Informations de conformité
RoHS and lead-free status confirmed per NXP product page and Heisener listing. AEC-Q100 automotive qualification not explicitly stated in available data for the commercial-grade MC9S12UF32PB - extended-temperature variants such as MC9S12UF32PBE are commonly used in automotive applications. Conflict-minerals compliance is per NXP corporate policy.