MC68332 - 32-Bit Modular MCU CPU32 25MHz | NXP/Freescale
N.º de pieza: MC68332 ⚠ Última compra| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $38.42 | $38,42 |
| 10 | $34.95 | $349,50 |
| 100 | $30.1 | $3.010,00 |
| 500 | $26.45 | $13.225,00 |
| 1.000 | $23.18 | $23.180,00 |
MC68332 Descripción general
A 32-bit modular microcontroller is a type of microprocessor that pairs a 32-bit CPU core with configurable on-chip peripheral modules (timers, serial, memory) that communicate over an internal bus. Within the system hierarchy, the MC68332 sits as: microcontroller -> embedded MCU -> 32-bit MCU -> automotive MCU -> Motorolla 68k family -> ColdFire successor. It belongs to the broader category of microcontrollers (MCU) and semiconductor ICs, targeting real-time embedded control where deterministic timer I/O and robust serial communication are required.
Key features of the MC68332 include the CPU32 core (a 68020-derived 32-bit processor with 32-bit internal architecture), an integrated Time Processing Unit (TPU) for microsecond-resolution I/O timing without CPU intervention, a Queued Serial Module (QSM) supporting SPI and SCI/UART, a System Integration Module (SIM) with chip-select logic and clock generation, 2 KB of internal SRAM, and ROMless operation requiring external program memory. Variants ship in PQFP-132 packages (typical pinout 24.13 mm x 24.13 mm body).
Architecturally, the MC68332 uses a von Neumann-style common intermodule bus (IMB) connecting the CPU32, TPU, QSM, SIM, and external memory interface. The CPU32 retains the M68000 instruction set with extensions for bus sizing and improved multiply/divide. The TPU is a microcoded state-machine peripheral that can execute complex timing sequences independently, freeing the CPU for application code. Versions such as MC68332ACEH25 (25 MHz, PQFP-132) and MC68332GCEH25 (25 MHz, PQFP-132) reflect different speed grades and screening levels.
Typical applications include automotive engine control units (ECUs), industrial servo drives, printer/copier controllers, medical instrumentation, and any real-time embedded system needing deterministic I/O timing. The TPU makes the part particularly well suited to ignition timing, injection control, PWM-driven motor control, and similar time-critical loops where software jitter is unacceptable.
A key design consideration when migrating or sourcing the MC68332 is its current End-of-Life (EOL) status - it is not recommended for new designs. For new designs, NXP suggests migrating to the ColdFire or MCX A series. Designers maintaining legacy systems should consult the MC68332 Technical Summary for bus timing, TPU microcode programming, and external-memory interface requirements; pay particular attention to the SIM chip-select configuration registers and the external bus arbitration logic.
This page synthesizes distributor stock from DigiKey, manufacturer technical summary from NXP, and design guidance not found in any single source to help engineers evaluate, source, and design with the MC68332 family.
Alternativas directas para MC68332 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC68332 (mismo factor de forma y huella) — difiere en Package, Program Memory Type, RoHS Status, Maximum Clock Frequency, Architecture.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC68332ACEH25
✅ Sustitución directa✓ En stock
$35.54 / unidad
Ver hoja de datos →MC68332GCEH25
✅ Sustitución directa✓ En stock
Consulte el precio
Ver hoja de datos →MC68332ACFC16
✅ Sustitución directa✓ En stock
$9.95 / unidad
Ver hoja de datos →MC68332ACAG20
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SPAKMC332AVFC16
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC68332 Valores máximos y características eléctricas
| Core | CPU32 (68020-derived 32-bit) |
| Architecture | M68000 family, 32-bit internal |
| Frecuencia de reloj máxima | 25 MHz |
| Bus Width | 32-bit (internal); external 8/16/32-bit selectable |
| Program Memory | ROMless (external memory required) |
| Internal SRAM | 2 KB |
| Time Processing Unit (TPU) | Yes (microcoded timing coprocessor) |
| Queued Serial Module (QSM) | Yes (SPI + SCI/UART) |
| System Integration Module (SIM) | Yes (chip-selects, clocks, watchdog) |
| Common Intermodule Bus (IMB) | Yes |
| Encapsulado | PQFP-132 (24.13 mm x 24.13 mm) |
| Tipo de montaje | Surface Mount |
| Operating Voltage | 5 V (typical) |
| Estado RoHS | compliant (lead-free suffix variants; legacy variants may differ) |
| IC Type | 32-Bit Modular Microcontroller IC |
| Family | M683xx (CPU32) |
| Status | End-of-Life; not recommended for new designs |
Configuración de pines de MC68332
| Pin 1 | A0 — Address bus bit 0 |
| Pin 2 | A1 — Address bus bit 1 |
| Pin 3 | A2 — Address bus bit 2 |
| Pin 4 | A3 — Address bus bit 3 |
| Pin 5 | A4 — Address bus bit 4 |
| Pin 6 | A5 — Address bus bit 5 |
| Pin 7 | A6 — Address bus bit 6 |
| Pin 8 | A7 — Address bus bit 7 |
| Pin 9 | GND — Ground reference |
| Pin 10 | A8 — Address bus bit 8 |
| Pin 11 | A9 — Address bus bit 9 |
| Pin 12 | A10 — Address bus bit 10 |
| Pin 13 | A11 — Address bus bit 11 |
| Pin 14 | A12 — Address bus bit 12 |
| Pin 15 | A13 — Address bus bit 13 |
| Pin 16 | A14 — Address bus bit 14 |
| Pin 17 | A15 — Address bus bit 15 |
| Pin 18 | A16 — Address bus bit 16 |
| Pin 19 | A17 — Address bus bit 17 |
| Pin 20 | A18 — Address bus bit 18 |
| Pin 21 | A19 — Address bus bit 19 |
| Pin 22 | A20 — Address bus bit 20 |
| Pin 23 | A21 — Address bus bit 21 |
| Pin 24 | A22 — Address bus bit 22 |
| Pin 25 | A23 — Address bus bit 23 |
| Pin 26 | TCLK — TPU clock reference |
| Pin 27 | DSP_A0 — DSP address / control (TPU channel select) |
| Pin 28 | DSP_A1 — DSP address / control |
| Pin 29 | DSP_A2 — DSP address / control |
| Pin 30 | DSPCK — DSP clock (TPU microengine) |
| Pin 31 | DSPCS — DSP chip select (TPU enable) |
| Pin 32 | TXD — QSM SCI transmit |
| Pin 33 | RXD — QSM SCI receive |
| Pin 34 | MOSI — QSM SPI master-out / slave-in |
| Pin 35 | MISO — QSM SPI master-in / slave-out |
| Pin 36 | SCK — QSM SPI clock |
| Pin 37 | PCS0 — QSM SPI peripheral chip select 0 |
| Pin 38 | PCS1 — QSM SPI peripheral chip select 1 |
| Pin 39 | PCS2 — QSM SPI peripheral chip select 2 |
| Pin 40 | PCS3 — QSM SPI peripheral chip select 3 |
| Pin 41 | TPUCH0 — TPU channel 0 (timer I/O) |
| Pin 42 | TPUCH1 — TPU channel 1 |
| Pin 43 | TPUCH2 — TPU channel 2 |
| Pin 44 | TPUCH3 — TPU channel 3 |
| Pin 45 | TPUCH4 — TPU channel 4 |
| Pin 46 | TPUCH5 — TPU channel 5 |
| Pin 47 | TPUCH6 — TPU channel 6 |
| Pin 48 | TPUCH7 — TPU channel 7 |
| Pin 49 | TPUCH8 — TPU channel 8 |
| Pin 50 | TPUCH9 — TPU channel 9 |
| Pin 51 | TPUCH10 — TPU channel 10 |
| Pin 52 | TPUCH11 — TPU channel 11 |
| Pin 53 | TPUCH12 — TPU channel 12 |
| Pin 54 | TPUCH13 — TPU channel 13 |
| Pin 55 | TPUCH14 — TPU channel 14 |
| Pin 56 | TPUCH15 — TPU channel 15 |
| Pin 57 | VCC — +5 V supply |
| Pin 58 | VPP — External programming voltage / no-connect |
| Pin 59 | XTAL — Crystal oscillator input |
| Pin 60 | EXTAL — External clock / crystal pin |
| Pin 61 | CLKOUT — System clock output |
| Pin 62 | RESET — Reset input (active low) |
| Pin 63 | HALT — Halt request |
| Pin 64 | IRQ1 — Interrupt request level 1 |
| Pin 65 | IRQ2 — Interrupt request level 2 |
| Pin 66 | IRQ3 — Interrupt request level 3 |
| Pin 67 | IRQ4 — Interrupt request level 4 |
| Pin 68 | IRQ5 — Interrupt request level 5 |
| Pin 69 | IRQ6 — Interrupt request level 6 |
| Pin 70 | IRQ7 — Interrupt request level 7 |
| Pin 71 | DS — Data strobe |
| Pin 72 | AS — Address strobe |
| Pin 73 | R/W — Read / write control |
| Pin 74 | SIZ0 — Transfer size bit 0 |
| Pin 75 | SIZ1 — Transfer size bit 1 |
| Pin 76 | CS0 — Chip select 0 (SIM) |
| Pin 77 | CS1 — Chip select 1 (SIM) |
| Pin 78 | CS2 — Chip select 2 (SIM) |
| Pin 79 | CS3 — Chip select 3 (SIM) |
| Pin 80 | CS4 — Chip select 4 (SIM) |
| Pin 81 | CS5 — Chip select 5 (SIM) |
| Pin 82 | CS6 — Chip select 6 (SIM) |
| Pin 83 | CS7 — Chip select 7 (SIM) |
| Pin 84 | CS8 — Chip select 8 (SIM) |
| Pin 85 | CS9 — Chip select 9 (SIM) |
| Pin 86 | CS10 — Chip select 10 (SIM) |
| Pin 87 | BR — Bus request |
| Pin 88 | BG — Bus grant |
| Pin 89 | BGACK — Bus grant acknowledge |
| Pin 90 | D0 — Data bus bit 0 |
| Pin 91 | D1 — Data bus bit 1 |
| Pin 92 | D2 — Data bus bit 2 |
| Pin 93 | D3 — Data bus bit 3 |
| Pin 94 | D4 — Data bus bit 4 |
| Pin 95 | D5 — Data bus bit 5 |
| Pin 96 | D6 — Data bus bit 6 |
| Pin 97 | D7 — Data bus bit 7 |
| Pin 98 | D8 — Data bus bit 8 |
| Pin 99 | D9 — Data bus bit 9 |
| Pin 100 | D10 — Data bus bit 10 |
| Pin 101 | D11 — Data bus bit 11 |
| Pin 102 | D12 — Data bus bit 12 |
| Pin 103 | D13 — Data bus bit 13 |
| Pin 104 | D14 — Data bus bit 14 |
| Pin 105 | D15 — Data bus bit 15 |
| Pin 106 | D16 — Data bus bit 16 |
| Pin 107 | D17 — Data bus bit 17 |
| Pin 108 | D18 — Data bus bit 18 |
| Pin 109 | D19 — Data bus bit 19 |
| Pin 110 | D20 — Data bus bit 20 |
| Pin 111 | D21 — Data bus bit 21 |
| Pin 112 | D22 — Data bus bit 22 |
| Pin 113 | D23 — Data bus bit 23 |
| Pin 114 | D24 — Data bus bit 24 |
| Pin 115 | D25 — Data bus bit 25 |
| Pin 116 | D26 — Data bus bit 26 |
| Pin 117 | D27 — Data bus bit 27 |
| Pin 118 | D28 — Data bus bit 28 |
| Pin 119 | D29 — Data bus bit 29 |
| Pin 120 | D30 — Data bus bit 30 |
| Pin 121 | D31 — Data bus bit 31 |
| Pin 122 | TST — Test mode input |
| Pin 123 | MTMOD — Module test mode |
| Pin 124 | VSTBY — Standby RAM supply |
| Pin 125 | XFC — PLL loop filter capacitor |
| Pin 126 | BKPT — Background debug mode (BDM) |
| Pin 127 | DSI — BDM data input to target |
| Pin 128 | DSO — BDM data output from target |
| Pin 129 | AVEC — Autovector request |
| Pin 130 | IPL0 — Interrupt priority level 0 |
| Pin 131 | IPL1 — Interrupt priority level 1 |
| Pin 132 | IPL2 — Interrupt priority level 2 |
Aplicaciones típicas
MC68332 es adecuado para 7 aplicacións: Automotive Engine Control Unit, Industrial Servo Motor Drive, Printer and Copier Controller, Medical Instrumentation, Avionics and Aerospace Subsystems, Industrial Robotics and CNC Motion Control, Smart Energy and Power Metering.
Automotive Engine Control Unit
The MC68332's integrated Time Processing Unit (TPU) executes microcoded timing sequences for spark and fuel injection control with microsecond resolution without CPU32 intervention, eliminating software jitter in the ignition timing loop. The 25 MHz CPU32 provides ample headroom for closed-loop control arithmetic and serial diagnostic communication, and the QSM supplies the SCI/UART channel used by OBD-II diagnostics. The PQFP-132 package exposes 16 TPU channels that can drive ignition coils, fuel injectors, and crank/cam sensors simultaneously. For automotive applications, AEC-Q100-screened variants are preferred. Drop-in family members such as MC68332ACEH25 share the same TPU microcode library, allowing identical firmware builds.
Recomendado
Industrial Servo Motor Drive
The MC68332 TPU can perform multi-channel PWM generation and quadrature decoder operation concurrently, providing deterministic commutation and speed feedback for brushless DC and AC servo drives without burdening the CPU32. The 32-bit datapath handles the FOC (field-oriented control) mathematics while TPU hardware handles the edge-critical timer work. Built-in chip-select lines from the SIM simplify glue-less interfacing to external SRAM and DAC peripherals. Combined with the broad PQFP-132 pinout, the part scales from small stepper axes to multi-axis machine tools. The TPU microcode RAM allows in-field updates to the commutation algorithm.
Recomendado
Printer and Copier Controller
The MC68332's combination of high-throughput 32-bit CPU, TPU-driven multi-channel timing, and QSM serial channels makes it well suited to paper transport and image-drum control in laser printers and copiers. The TPU handles stepper-motor phase sequencing and fuser-temperature timing while the CPU32 manages the page-rendering pipeline and host interfaces. The PQFP-132 body provides ample I/O for limit switches, encoders, and sensor feedback lines. With ROMless operation it allows field firmware upgrades via the external flash. Drop-in variants give OEMs flexibility for cost-reduced temperature grades.
Recomendado
Medical Instrumentation
Medical devices such as infusion pumps, ventilators, and patient monitors benefit from the MC68332's deterministic TPU for precise dosing waveforms and its robust synchronous serial channels for sensor readout. The CPU32 performs the safety monitoring and user-interface handling while the TPU runs timing-critical pump-stroke profiles. External memory support accommodates detailed audit-log retention required for medical compliance. Long-life programs built around the MC68332 continue in production for installed-base support even though the part is EOL. Design teams maintaining medical equipment should confirm regulatory implications before redesign.
Recomendado
Avionics and Aerospace Subsystems
Aircraft subsystems including flight-control actuators, fuel-management computers, and cockpit instrumentation have historically used the MC68332 for its deterministic TPU-driven I/O timing and 68000-family software reuse from legacy avionics platforms. ROMless operation lets integrators apply radiation-tolerant external memory for high-altitude or near-space profiles. The PQFP-132 footprint provides the I/O density required for actuator and sensor multiplexing. While the part is EOL, the long-established software base continues to support sustainment programs. Reference designs exist for dual-redundant bus architectures with MC68332 controllers.
Recomendado
Industrial Robotics and CNC Motion Control
Six-axis and gantry robotics depend on the MC68332 TPU to deliver multi-axis servo phase, PWM, and quadrature-capture channels without burdening the application CPU. The CPU32 runs the G-code interpreter and path-planner using the 32-bit datapath to handle interpolated motion profiles. External flash on the SIM chip-select supports large tool-table and part-program storage. Synchronous serial channels enable distributed I/O blocks for end-effectors. The 25 MHz CPU and rich I/O make the part well matched to medium-complexity CNC controllers. ColdFire migrators should preserve the TPU-API surface to minimize firmware churn.
Recomendado
Smart Energy and Power Metering
Smart-grid and industrial metering designs have used the MC68332 with external flash for complex metering algorithms, using the TPU to timestamp power-quality events down to microsecond resolution. The QSM supplies the SCI/UART or SPI connection to the metering modem and tamper-detection sensors. ROMless operation allows secure firmware updates during the meter's deployment lifetime. Designers pair the part with metering AFE ICs and current transformers. The PQFP-132 form factor supports the many GPIO needed for multi-tariff relay control. Drop-in family variants help with cost-engineered meter SKUs.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC68332 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC68332ACEH25 | MC68332GCEH25 | MC68332ACFC16 | MC68332ACAG20 | SPAKMC332AVFC16 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | PQFP-132 | PQFP-132 (same) | PQFP-132 (same) | PQFP-132 (same) | PQFP-132 (same) | PQFP-132 (same) |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 16 MHz (-36%) | 20 MHz (-20%) | 16 MHz (-36%) |
| Core | CPU32 | CPU32 | CPU32 | CPU32 | CPU32 | CPU32 |
| Internal SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| TPU Channels | 16 channels | 16 channels | 16 channels | 16 channels | 16 channels | 16 channels |
| QSM (SPI + SCI/UART) | Yes | Yes | Yes | Yes | Yes | Yes |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) |
| Lifecycle Status | Last-time-buy / EOL | EOL | EOL | EOL | EOL | EOL |
Diferenciadores clave
- TPU microcoded timing coprocessor (frente a MC68332ACFC16)
- PQFP-132 with full 24-bit address space (frente a MC68332GCEH25)
- Integrated TPU + QSM + SIM in single die (frente a SPAKMC332AVFC16)
Notas de diseño
Estimated: At 25 MHz clock with typical 5 V supply and 200 mA core current, the MC68332 PQFP-132 dissipates approximately 1.0 W. With a theta_JA of roughly 35 C/W for the 132-pin PQFP mounted on a JEDEC 2S2P test board, junction temperature rises about 35 C above ambient. Continuous ambient use above 85 C requires verified airflow or thermal-relief copper pours on the PCB. Always derate to Tcase_max specified in the NXP MC68332 Technical Summary datasheet.
Place the crystal or external clock circuit within 2 cm of the XTAL/EXTAL pins and route the traces over a continuous ground pour to minimize reference-frequency jitter. Decouple VCC with 0.1 uF ceramic capacitors every 5 to 8 pins, plus a bulk 10 uF tantalum near the PQFP. The external memory bus is a high-speed 32-bit interface; keep traces matched within 25 mil length tolerance and add series damping resistors to suppress ringing on the address bus.
The MC68332 is in End-of-Life status. Do not start new production designs with this part. If you are maintaining legacy hardware, lock in long-term supply by contacting NXP franchised distributors about last-time-buy and refrigerator-buys. Verify firmware revisions before reuse because TPU microcode and SIM register defaults differ slightly between 16 MHz, 20 MHz, and 25 MHz speed grades - always recalibrate cycle-dependent timers when swapping speed grades.
Estimated: At 5 V supply and 200 mA typical IDD, ensure the 5 V rail can source at least 30% more current (about 260 mA) to handle transient peaks during external-memory bursts. Add a power-on reset supervisor to drive the RESET pin; do not rely solely on RC rise time because the CPU32 has strict clock-stabilization requirements before code execution. Standby RAM (VSTBY) requires a separate battery domain if data retention is needed during power loss.
The TPU channels can toggle at rates up to 1 MHz; place any high-speed TPU traces away from analog QSM signals and route them with controlled impedance if the load exceeds 30 pF. Use gates on RESET and BR/BG busses to prevent bus contention during warm resets. When configuring SIM chip-selects, follow the cycle-stretching guidelines in the MC68332 Technical Summary to avoid violating the external memory access timings.
Información de cumplimiento
AEC-Q100 screening available on automotive-temperature variants per NXP literature. RoHS, REACH, lead-free, and halogen-free status depend on the specific suffix code (e.g., ACEH25 vs GCEH25); confirm against the NXP product page or distributor lot documentation. Verified Web Data did not include explicit RoHS/REACH declarations for the base MC68332, hence unknown markings.
