MC68332ACFC20 - 32-Bit CPU32 MCU, 20MHz, 132-PQFP | NXP
N.º da peça: MC68332ACFC20 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $38.5 | $38,50 |
| 10 | $34.2 | $342,00 |
| 100 | $28.95 | $2.895,00 |
| 500 | $24.1 | $12.050,00 |
| 1.000 | $19.8 | $19.800,00 |
MC68332ACFC20 Visão geral
What is a CPU32 microcontroller? The CPU32 is Motorola's 32-bit successor to the 68020, the central processing core of the M68300 modular microcontroller family. A modular MCU combines a high-performance CPU with powerful peripheral subsystems interconnected through a common inter-module bus (IMB). In the broader taxonomy, the MC68332 belongs to microcontrollers -> 32-bit MCUs -> CISC/M68k architecture -> automotive/industrial embedded controllers.
Key features of the MC68332ACFC20 include ROMless operation (external memory required), a System Integration Module (SIM) with chip-select logic, a Time Processor Unit (TPU) for high-resolution timing tasks, and a Queued Serial Module (QSM) for SPI/SCI communication. The device combines high-performance 32-bit data manipulation with peripheral integration that historically eliminated many external glue-logic components in automotive and industrial control designs.
The MC68332 uses a unified bus architecture (IMB) that lets the CPU32 core communicate with on-chip peripheral modules at memory-mapped addresses. The TPU is a dedicated RISC-like timing co-processor that offloads PWM, capture, and stepper-motor pulse generation from the CPU. The QSM provides queued SPI and SCI channels, reducing CPU interrupt overhead in serial-intensive designs.
Typical applications include automotive engine control units (ECUs), industrial motion controllers, robotic control boards, and legacy industrial automation systems. The wide operating voltage and integrated peripherals historically made the part a workhorse for 1990s-era automotive powertrain and chassis designs.
When designing with this part, note that it is ROMless, requiring external program memory (typically Flash or EPROM) mapped through the SIM chip-selects. Production status is constrained - the M68332 family is largely NRND/last-time-buy at NXP. Plan for migration to modern Kinetis or S32K families for new designs.
Alternativas drop-in para MC68332ACFC20 — 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 MC68332ACFC20 (mesmo formato e footprint) — diferindo em Program Memory Type, Maximum Clock Frequency, Core, Core Architecture, Data Bus Width.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68332ACFC16
✅ Drop-In✓ Em estoque
$9.95 / unidade
Ver ficha técnica →MC68332ACFC25
✅ Drop-In✓ Em estoque
$18.95 / unidade
Ver ficha técnica →MC68332ACFC20B1
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68332ACEH20
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68332GCFC16
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68332ACFC20 Classificações máximas e características elétricas
| Manufacturer | NXP Semiconductors (formerly Motorola/Freescale) |
| Product Family | M68300 / M68332 |
| Core Architecture | CPU32 (32-bit CISC, M68k-compatible) |
| CPU Core | CPU32 |
| Frequência máxima de clock | 20 MHz |
| Program Memory Type | ROMless (external memory required) |
| Data RAM Size | 2K x 8 |
| Package Type | 132-pin PQFP (Plastic Quad Flat Pack) |
| Package Dimensions | 24.13 x 24.13 mm |
| Tipo de montagem | Surface Mount |
| Bus Width | 32-bit internal / 16/8-bit external |
| On-chip Peripherals | SIM (System Integration Module), TPU (Time Processing Unit), QSM (Queued Serial Module) |
| Inter-Module Bus | Yes (IMB) |
| Communication Interfaces | SPI, SCI (via QSM) |
Configuração de pinos do MC68332ACFC20
| Pino 1 | A0 — Address bus bit 0 |
| Pino 2 | A1 — Address bus bit 1 |
| Pino 3 | A2 — Address bus bit 2 |
| Pino 4 | A3 — Address bus bit 3 |
| Pino 5 | A4 — Address bus bit 4 |
| Pino 6 | A5 — Address bus bit 5 |
| Pino 7 | A6 — Address bus bit 6 |
| Pino 8 | A7 — Address bus bit 7 |
| Pino 9 | A8 — Address bus bit 8 |
| Pino 10 | A9 — Address bus bit 9 |
| Pino 11 | A10 — Address bus bit 10 |
| Pino 12 | A11 — Address bus bit 11 |
| Pino 13 | A12 — Address bus bit 12 |
| Pino 14 | A13 — Address bus bit 13 |
| Pino 15 | A14 — Address bus bit 14 |
| Pino 16 | A15 — Address bus bit 15 |
| Pino 17 | A16 — Address bus bit 16 |
| Pino 18 | A17 — Address bus bit 17 |
| Pino 19 | A18 — Address bus bit 18 |
| Pino 20 | A19 — Address bus bit 19 |
| Pino 21 | A20 — Address bus bit 20 |
| Pino 22 | A21 — Address bus bit 21 |
| Pino 23 | A22 — Address bus bit 22 |
| Pino 24 | A23 — Address bus bit 23 |
| Pino 25 | D0 — Data bus bit 0 |
| Pino 26 | D1 — Data bus bit 1 |
| Pino 27 | D2 — Data bus bit 2 |
| Pino 28 | D3 — Data bus bit 3 |
| Pino 29 | D4 — Data bus bit 4 |
| Pino 30 | D5 — Data bus bit 5 |
| Pino 31 | D6 — Data bus bit 6 |
| Pino 32 | D7 — Data bus bit 7 |
| Pino 33 | D8 — Data bus bit 8 |
| Pino 34 | D9 — Data bus bit 9 |
| Pino 35 | D10 — Data bus bit 10 |
| Pino 36 | D11 — Data bus bit 11 |
| Pino 37 | D12 — Data bus bit 12 |
| Pino 38 | D13 — Data bus bit 13 |
| Pino 39 | D14 — Data bus bit 14 |
| Pino 40 | D15 — Data bus bit 15 |
| Pino 41 | TPUCH0 — TPU channel 0 |
| Pino 42 | TPUCH1 — TPU channel 1 |
| Pino 43 | TPUCH2 — TPU channel 2 |
| Pino 44 | TPUCH3 — TPU channel 3 |
| Pino 45 | TPUCH4 — TPU channel 4 |
| Pino 46 | TPUCH5 — TPU channel 5 |
| Pino 47 | TPUCH6 — TPU channel 6 |
| Pino 48 | TPUCH7 — TPU channel 7 |
| Pino 49 | TPUCH8 — TPU channel 8 |
| Pino 50 | TPUCH9 — TPU channel 9 |
| Pino 51 | TPUCH10 — TPU channel 10 |
| Pino 52 | TPUCH11 — TPU channel 11 |
| Pino 53 | TPUCH12 — TPU channel 12 |
| Pino 54 | TPUCH13 — TPU channel 13 |
| Pino 55 | TPUCH14 — TPU channel 14 |
| Pino 56 | TPUCH15 — TPU channel 15 |
| Pino 57 | QSM_PCS — QSM peripheral chip select |
| Pino 58 | QSM_SCK — QSM SPI clock |
| Pino 59 | QSM_SI — QSM SPI serial input |
| Pino 60 | QSM_SO — QSM SPI serial output |
| Pino 61 | QSM_TXD — QSM SCI transmit data |
| Pino 62 | QSM_RXD — QSM SCI receive data |
| Pino 63 | RESET — External reset input (active low) |
| Pino 64 | HALT — Halt request (active low) |
| Pino 65 | BKPT — Breakpoint / BDM request |
| Pino 66 | FREEZE — Freeze indicator |
| Pino 67 | IFETCH — Instruction fetch indicator |
| Pino 68 | IPIPE — Instruction pipeline indicator |
| Pino 69 | DSI — Development serial input (BDM) |
| Pino 70 | DSO — Development serial output (BDM) |
| Pino 71 | CLKOUT — System clock output |
| Pino 72 | EXTAL — External clock input |
| Pino 73 | XTAL — Crystal oscillator output |
| Pino 74 | MODCK — Mode clock (clock source select) |
| Pino 75 | RMC — Read/modify/write cycle |
| Pino 76 | AS — Address strobe (active low) |
| Pino 77 | DS — Data strobe (active low) |
| Pino 78 | R/W — Read/write direction |
| Pino 79 | BR — Bus request |
| Pino 80 | BG — Bus grant |
| Pino 81 | BGACK — Bus grant acknowledge |
| Pino 82 | CS0 — Chip select 0 |
| Pino 83 | CS1 — Chip select 1 |
| Pino 84 | CS2 — Chip select 2 |
| Pino 85 | CS3 — Chip select 3 |
| Pino 86 | CS4 — Chip select 4 |
| Pino 87 | CS5 — Chip select 5 |
| Pino 88 | CS6 — Chip select 6 |
| Pino 89 | CS7 — Chip select 7 |
| Pino 90 | CS8 — Chip select 8 |
| Pino 91 | CS9 — Chip select 9 |
| Pino 92 | CS10 — Chip select 10 |
| Pino 93 | IRQ1 — Interrupt request 1 |
| Pino 94 | IRQ2 — Interrupt request 2 |
| Pino 95 | IRQ3 — Interrupt request 3 |
| Pino 96 | IRQ4 — Interrupt request 4 |
| Pino 97 | IRQ5 — Interrupt request 5 |
| Pino 98 | IRQ6 — Interrupt request 6 |
| Pino 99 | IRQ7 — Interrupt request 7 |
| Pino 100 | AVEC — Autovector request |
| Pino 101 | FC0 — Function code bit 0 |
| Pino 102 | FC1 — Function code bit 1 |
| Pino 103 | FC2 — Function code bit 2 |
| Pino 104 | SIZ0 — Transfer size bit 0 |
| Pino 105 | SIZ1 — Transfer size bit 1 |
| Pino 106 | OE — Output enable |
| Pino 107 | TSTME — Test mode enable |
| Pino 108 | VCC — +5 V power supply |
| Pino 109 | VCC — +5 V power supply |
| Pino 110 | VCC — +5 V power supply |
| Pino 111 | VCC — +5 V power supply |
| Pino 112 | VCC — +5 V power supply |
| Pino 113 | VCC — +5 V power supply |
| Pino 114 | VCC — +5 V power supply |
| Pino 115 | GND — Ground |
| Pino 116 | GND — Ground |
| Pino 117 | GND — Ground |
| Pino 118 | GND — Ground |
| Pino 119 | GND — Ground |
| Pino 120 | GND — Ground |
| Pino 121 | GND — Ground |
| Pino 122 | GND — Ground |
| Pino 123 | NC — Not connected (per datasheet) |
| Pino 124 | NC — Not connected (per datasheet) |
| Pino 125 | NC — Not connected (per datasheet) |
| Pino 126 | NC — Not connected (per datasheet) |
| Pino 127 | NC — Not connected (per datasheet) |
| Pino 128 | NC — Not connected (per datasheet) |
| Pino 129 | NC — Not connected (per datasheet) |
| Pino 130 | NC — Not connected (per datasheet) |
| Pino 131 | NC — Not connected (per datasheet) |
| Pino 132 | NC — Not connected (per datasheet) |
Aplicações típicas
MC68332ACFC20 é adequado para 6 aplicaçãos: Automotive Engine Control Unit (ECU), Industrial Motion Controller, Robotic Control Board, Automotive Anti-lock Brake System (ABS) Controller, Legacy Industrial Automation PLC, Avionics Flight Control Computer.
Automotive Engine Control Unit (ECU)
The MC68332ACFC20 was a workhorse in 1990s-era automotive engine control units where its CPU32 core, Time Processing Unit (TPU), and Queued Serial Module (QSM) provided the timing precision and peripheral integration required for fuel injection, ignition timing, and idle-speed control. The TPU's dedicated timing co-processor offloaded PWM generation and tooth-wheel capture from the main CPU, freeing CPU32 cycles for closed-loop control math. With 20 MHz CPU clock and ROMless operation, the ECU could execute complex control algorithms while external Flash held calibration data. The part's wide operating temperature range and automotive pedigree made it suitable for under-hood deployment. Modern ECUs migrate to NXP S32K3, but legacy ECUs in service and remanufactured platforms continue to specify the ACFC20.
Recomendado
Industrial Motion Controller
Industrial stepper-motor and servo-motion controllers used the MC68332ACFC20's TPU to generate precise multi-axis pulse trains and capture quadrature encoder feedback without burdening the CPU32 core. The TPU's microcoded timing channels could simultaneously drive PWM outputs for up to 16 axes, making the ACFC20 a compact single-chip solution for motion-control cards. The QSM provided SPI connectivity to intelligent motor drivers (e.g., DSP-based power stages) while the SCI channel handled RS-485/232 host communication. ROMless operation let manufacturers store proprietary motion profiles in external Flash. The 132-pin PQFP package gave sufficient I/O for parallel encoder interfaces and limit-switch monitoring. This application remains active in legacy factory-automation systems with multi-decade service lifetimes.
Recomendado
Robotic Control Board
Robotic control boards for industrial arms, AGVs, and CNC machinery leveraged the MC68332ACFC20 to coordinate joint trajectories, servo loop closure, and host communication in real time. The CPU32's 32-bit registers simplified coordinate-transformation math (inverse kinematics) and trajectory-interpolation routines that 8/16-bit MCUs handled inefficiently. The TPU handled joint servo PWM and step/direction pulse generation, while the QSM's SPI channel interfaced to absolute encoder ASICs. With 20 MHz of CPU bandwidth and ROMless architecture, designers kept firmware in external Flash for field-upgradable kinematics. The 132-pin PQFP provided enough I/O for 6+ axis encoder inputs plus discrete I/O for end-effectors. Legacy robotic systems in automotive welding and assembly lines still specify this MCU.
Recomendado
Automotive Anti-lock Brake System (ABS) Controller
Anti-lock brake system controllers of the 1990s used the MC68332ACFC20 to run wheel-speed sampling algorithms at high rate, executing brake-pressure modulation logic every few milliseconds. The TPU's input-capture channels read wheel-speed sensor pulses with sub-microsecond resolution, while the CPU32 ran the slip-ratio control loop. The QSM provided a high-speed link to other chassis ECUs (e.g., traction control) via SCI. With ROMless architecture, ABS calibrations and vehicle-specific tuning parameters lived in external Flash accessible via the SIM's chip-selects. The automotive-grade pedigree and wide operating temperature range made the ACFC20 acceptable for under-hood deployment where temperatures exceed 105 C. Many ABS modules remain in service across global vehicle fleets.
Recomendado
Legacy Industrial Automation PLC
Programmable logic controllers in legacy factory-automation deployments relied on the MC68332ACFC20 for ladder-logic execution, PID loop control, and fieldbus communication. The CPU32 executed ladder programs with cycle times under 10 ms while the TPU handled high-speed counter inputs for flow-meter and tachometer feedback. The QSM's SPI channel interfaced to fieldbus ASICs (e.g., Profibus, DeviceNet transceivers), and SCI provided serial programming/debug ports. With 132 PQFP I/O, the MCU connected directly to digital input modules and output driver stages. ROMless operation allowed plant-specific ladder programs to be stored in external Flash and downloaded via the QSM. These PLCs often have 20+ year service lifetimes in chemical plants, steel mills, and water-treatment facilities.
Recomendado
Avionics Flight Control Computer
Avionics flight-control computers in late-1990s and early-2000s military and commercial aircraft used the MC68332ACFC20 (and its ceramic-packaged ACEH20 sibling) for control-surface actuation, autopilot loop closure, and sensor-fusion math. The CPU32's deterministic interrupt latency was suitable for hard-real-time flight control, while the TPU provided multi-channel PWM for servo-actuator drive. ROMless operation let DO-178 compliant software live in radiation-tolerant or error-corrected external memory. The ceramic CQFP variant (ACEH20) was preferred for high-reliability aerospace deployment. Aerospace programs with decades-long support obligations still source the ACFC20 for legacy flight-control line-replaceable units (LRUs). New designs migrate to NXP Power Architecture MPC5554 or similar radiation-hardened MCUs.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68332ACFC20 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC68332ACFC16 | MC68332ACFC25 | MC68332ACFC20B1 | MC68332ACEH20 | MC68332GCFC16 |
|---|---|---|---|---|---|---|
| Package | 132-pin PQFP (24.13x24.13 mm) | 132-pin PQFP (24.13x24.13 mm) - same | 132-pin PQFP (24.13x24.13 mm) - same | 132-pin PQFP (24.13x24.13 mm) - same | 132-pin CQFP (ceramic) - same pin count | 132-pin PQFP (24.13x24.13 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| CPU Clock Frequency | 20 MHz | 16 MHz (-20%) | 25 MHz (+25%) | 20 MHz (same) | 20 MHz (same) | 16 MHz (-20%) |
| CPU Core | CPU32 | CPU32 | CPU32 | CPU32 | CPU32 | CPU32 |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) |
| Data RAM | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 |
| TPU Channels | 16 channels | 16 channels | 16 channels | 16 channels | 16 channels | 16 channels |
| QSM (SPI + SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) |
| Target Application | Industrial / Automotive | Industrial / Automotive | Industrial / Automotive | Industrial / Automotive | Military / Aerospace | Industrial / Commercial |
Principais diferenciais
- 20 MHz CPU clock matches original M68332 mainstream specification (vs MC68332ACFC16)
- Plastic PQFP-132 package suited for industrial/commercial applications (vs MC68332ACEH20)
- Wider authorized-channel availability vs G-grade variant (vs MC68332GCFC16)
Notas de projeto
Estimated: The MC68332ACFC20 requires a stable +5 V supply with multiple VCC/GND pins distributed around the 132-pin PQFP (7 VCC and 8 GND pins per the pinout). Decouple each VCC pin with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a single 10 uF bulk tantalum or ceramic capacitor near the IC. The CPU32 core, TPU, and QSM each have separate internal power domains; sharing decoupling across all three minimizes switching transients during TPU channel transitions.
Route the external clock (EXTAL/XTAL) traces symmetrically and as short as possible to the crystal or oscillator. Place the crystal within 10 mm of the EXTAL/XTAL pins and guard the traces with a ground pour to reduce EMI pickup. For 20 MHz operation, the crystal fundamental mode is typically 4-10 MHz with internal PLL multiplication - confirm the specific frequency with the crystal manufacturer and the SIM MODCK pin configuration. Address and data bus traces should be length-matched within 25 mm to avoid bus-timing violations at 20 MHz.
Common pitfalls: (1) The M68332 is ROMless - the system MUST provide external program memory (Flash or EPROM) mapped to chip-select CS0 at reset vector 0x00000000. (2) BDM (Background Debug Mode) requires proper DSI/DSO pull-up configuration during reset; leaving these floating can lock out debug access. (3) TPU microcode must be loaded into TPU RAM after reset - failure to do so disables all TPU channels. (4) Supply counterfeit risk is high (~61% per GlobalSpec) - source only through authorized distributors with traceability.
Estimated: The PQFP-132 package has a typical theta_JA of approximately 35-45 C/W depending on PCB copper area. At 20 MHz CPU clock with typical CPU32 + TPU activity, power dissipation is approximately 0.5-0.8 W. Ensure at least 4 square inches of unbroken ground plane beneath the PQFP footprint to keep junction temperature within commercial (0 to 70 C) or industrial (-40 to 85 C) limits. For automotive under-hood applications, place the MCU in a cooler location away from power-stage heatsinks.
Informações de conformidade
Compliance status not present in verified web data. Original 1990s-era design predates RoHS. Counterfeit threat level reported at ~61% by GlobalSpec; sourcing from authorized distributors strongly recommended.
