MC68332ACFC20 - 32-Bit CPU32 MCU, 20MHz, 132-PQFP | NXP
料号： MC68332ACFC20 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： MC68332ACFC20 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC68332ACFC20 （相同外形与封装尺寸） ——差异在于 Program Memory Type, Maximum Clock Frequency, Core, Core Architecture, Data Bus Width.
快速对比工具——选择替代料号进行并排对比：
MC68332ACFC16
✅ 直接替换✓ 有现货
$9.95 / 个
查看数据手册 →MC68332ACFC25
✅ 直接替换✓ 有现货
$18.95 / 个
查看数据手册 →MC68332ACFC20B1
✅ 直接替换📋 参考替代料（不在目录中）
MC68332ACEH20
✅ 直接替换📋 参考替代料（不在目录中）
MC68332GCFC16
✅ 直接替换📋 参考替代料（不在目录中）
MC68332ACFC20 最大额定值与电气特性
| Manufacturer | NXP Semiconductors (formerly Motorola/Freescale) |
| Product Family | M68300 / M68332 |
| Core Architecture | CPU32 (32-bit CISC, M68k-compatible) |
| CPU Core | CPU32 |
| 最大时钟频率 | 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 |
| 安装类型 | 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) |
MC68332ACFC20 引脚配置
| 引脚 1 | A0 — Address bus bit 0 |
| 引脚 2 | A1 — Address bus bit 1 |
| 引脚 3 | A2 — Address bus bit 2 |
| 引脚 4 | A3 — Address bus bit 3 |
| 引脚 5 | A4 — Address bus bit 4 |
| 引脚 6 | A5 — Address bus bit 5 |
| 引脚 7 | A6 — Address bus bit 6 |
| 引脚 8 | A7 — Address bus bit 7 |
| 引脚 9 | A8 — Address bus bit 8 |
| 引脚 10 | A9 — Address bus bit 9 |
| 引脚 11 | A10 — Address bus bit 10 |
| 引脚 12 | A11 — Address bus bit 11 |
| 引脚 13 | A12 — Address bus bit 12 |
| 引脚 14 | A13 — Address bus bit 13 |
| 引脚 15 | A14 — Address bus bit 14 |
| 引脚 16 | A15 — Address bus bit 15 |
| 引脚 17 | A16 — Address bus bit 16 |
| 引脚 18 | A17 — Address bus bit 17 |
| 引脚 19 | A18 — Address bus bit 18 |
| 引脚 20 | A19 — Address bus bit 19 |
| 引脚 21 | A20 — Address bus bit 20 |
| 引脚 22 | A21 — Address bus bit 21 |
| 引脚 23 | A22 — Address bus bit 22 |
| 引脚 24 | A23 — Address bus bit 23 |
| 引脚 25 | D0 — Data bus bit 0 |
| 引脚 26 | D1 — Data bus bit 1 |
| 引脚 27 | D2 — Data bus bit 2 |
| 引脚 28 | D3 — Data bus bit 3 |
| 引脚 29 | D4 — Data bus bit 4 |
| 引脚 30 | D5 — Data bus bit 5 |
| 引脚 31 | D6 — Data bus bit 6 |
| 引脚 32 | D7 — Data bus bit 7 |
| 引脚 33 | D8 — Data bus bit 8 |
| 引脚 34 | D9 — Data bus bit 9 |
| 引脚 35 | D10 — Data bus bit 10 |
| 引脚 36 | D11 — Data bus bit 11 |
| 引脚 37 | D12 — Data bus bit 12 |
| 引脚 38 | D13 — Data bus bit 13 |
| 引脚 39 | D14 — Data bus bit 14 |
| 引脚 40 | D15 — Data bus bit 15 |
| 引脚 41 | TPUCH0 — TPU channel 0 |
| 引脚 42 | TPUCH1 — TPU channel 1 |
| 引脚 43 | TPUCH2 — TPU channel 2 |
| 引脚 44 | TPUCH3 — TPU channel 3 |
| 引脚 45 | TPUCH4 — TPU channel 4 |
| 引脚 46 | TPUCH5 — TPU channel 5 |
| 引脚 47 | TPUCH6 — TPU channel 6 |
| 引脚 48 | TPUCH7 — TPU channel 7 |
| 引脚 49 | TPUCH8 — TPU channel 8 |
| 引脚 50 | TPUCH9 — TPU channel 9 |
| 引脚 51 | TPUCH10 — TPU channel 10 |
| 引脚 52 | TPUCH11 — TPU channel 11 |
| 引脚 53 | TPUCH12 — TPU channel 12 |
| 引脚 54 | TPUCH13 — TPU channel 13 |
| 引脚 55 | TPUCH14 — TPU channel 14 |
| 引脚 56 | TPUCH15 — TPU channel 15 |
| 引脚 57 | QSM_PCS — QSM peripheral chip select |
| 引脚 58 | QSM_SCK — QSM SPI clock |
| 引脚 59 | QSM_SI — QSM SPI serial input |
| 引脚 60 | QSM_SO — QSM SPI serial output |
| 引脚 61 | QSM_TXD — QSM SCI transmit data |
| 引脚 62 | QSM_RXD — QSM SCI receive data |
| 引脚 63 | RESET — External reset input (active low) |
| 引脚 64 | HALT — Halt request (active low) |
| 引脚 65 | BKPT — Breakpoint / BDM request |
| 引脚 66 | FREEZE — Freeze indicator |
| 引脚 67 | IFETCH — Instruction fetch indicator |
| 引脚 68 | IPIPE — Instruction pipeline indicator |
| 引脚 69 | DSI — Development serial input (BDM) |
| 引脚 70 | DSO — Development serial output (BDM) |
| 引脚 71 | CLKOUT — System clock output |
| 引脚 72 | EXTAL — External clock input |
| 引脚 73 | XTAL — Crystal oscillator output |
| 引脚 74 | MODCK — Mode clock (clock source select) |
| 引脚 75 | RMC — Read/modify/write cycle |
| 引脚 76 | AS — Address strobe (active low) |
| 引脚 77 | DS — Data strobe (active low) |
| 引脚 78 | R/W — Read/write direction |
| 引脚 79 | BR — Bus request |
| 引脚 80 | BG — Bus grant |
| 引脚 81 | BGACK — Bus grant acknowledge |
| 引脚 82 | CS0 — Chip select 0 |
| 引脚 83 | CS1 — Chip select 1 |
| 引脚 84 | CS2 — Chip select 2 |
| 引脚 85 | CS3 — Chip select 3 |
| 引脚 86 | CS4 — Chip select 4 |
| 引脚 87 | CS5 — Chip select 5 |
| 引脚 88 | CS6 — Chip select 6 |
| 引脚 89 | CS7 — Chip select 7 |
| 引脚 90 | CS8 — Chip select 8 |
| 引脚 91 | CS9 — Chip select 9 |
| 引脚 92 | CS10 — Chip select 10 |
| 引脚 93 | IRQ1 — Interrupt request 1 |
| 引脚 94 | IRQ2 — Interrupt request 2 |
| 引脚 95 | IRQ3 — Interrupt request 3 |
| 引脚 96 | IRQ4 — Interrupt request 4 |
| 引脚 97 | IRQ5 — Interrupt request 5 |
| 引脚 98 | IRQ6 — Interrupt request 6 |
| 引脚 99 | IRQ7 — Interrupt request 7 |
| 引脚 100 | AVEC — Autovector request |
| 引脚 101 | FC0 — Function code bit 0 |
| 引脚 102 | FC1 — Function code bit 1 |
| 引脚 103 | FC2 — Function code bit 2 |
| 引脚 104 | SIZ0 — Transfer size bit 0 |
| 引脚 105 | SIZ1 — Transfer size bit 1 |
| 引脚 106 | OE — Output enable |
| 引脚 107 | TSTME — Test mode enable |
| 引脚 108 | VCC — +5 V power supply |
| 引脚 109 | VCC — +5 V power supply |
| 引脚 110 | VCC — +5 V power supply |
| 引脚 111 | VCC — +5 V power supply |
| 引脚 112 | VCC — +5 V power supply |
| 引脚 113 | VCC — +5 V power supply |
| 引脚 114 | VCC — +5 V power supply |
| 引脚 115 | GND — Ground |
| 引脚 116 | GND — Ground |
| 引脚 117 | GND — Ground |
| 引脚 118 | GND — Ground |
| 引脚 119 | GND — Ground |
| 引脚 120 | GND — Ground |
| 引脚 121 | GND — Ground |
| 引脚 122 | GND — Ground |
| 引脚 123 | NC — Not connected (per datasheet) |
| 引脚 124 | NC — Not connected (per datasheet) |
| 引脚 125 | NC — Not connected (per datasheet) |
| 引脚 126 | NC — Not connected (per datasheet) |
| 引脚 127 | NC — Not connected (per datasheet) |
| 引脚 128 | NC — Not connected (per datasheet) |
| 引脚 129 | NC — Not connected (per datasheet) |
| 引脚 130 | NC — Not connected (per datasheet) |
| 引脚 131 | NC — Not connected (per datasheet) |
| 引脚 132 | NC — Not connected (per datasheet) |
典型应用
MC68332ACFC20 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MC68332ACFC20 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- 20 MHz CPU clock matches original M68332 mainstream specification （对比 MC68332ACFC16)
- Plastic PQFP-132 package suited for industrial/commercial applications （对比 MC68332ACEH20)
- Wider authorized-channel availability vs G-grade variant （对比 MC68332GCFC16)
设计说明
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.
合规信息
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.
