MC68332ACFC25 - 32-Bit 25MHz CPU32 MCU ROMless 132-PQFP | NXP
MPN: MC68332ACFC25 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $39.95 | $39.95 |
| 10 | $35.5 | $355.00 |
| 100 | $28 | $2,800.00 |
| 500 | $22.4 | $11,200.00 |
| 1,000 | $18.95 | $18,950.00 |
MC68332ACFC25 Overview
A microcontroller (MCU) is a single-chip computer that combines a CPU, memory, and programmable peripherals. The 68332 family is a highly-integrated 32-bit MCU that combines high-performance data manipulation capabilities with powerful peripheral subsystems. The 68332 sits within the broader M68300 (CPU32) microcontroller family, which itself belongs to the Coldfire/M68K lineage of processors used widely in industrial automation and automotive control.
Key features include a 25 MHz CPU32 core delivering 4 MIPS of sustained performance, an intelligent TPU that offloads timing events from the CPU, a QSM that handles SPI/UART serial protocols, and a 16-bit-wide intermodule bus (IMB) interconnecting internal peripherals. The device supports external address/data bus operation for code and data ROM expansion.
The architecture is based on a 32-bit internal register model with a 16-bit external data bus and 24-bit address bus for memory expansion. Built-in emulation support, a background debug mode (BDM), and JTAG boundary scan simplify development and field diagnostics. The 132-pin PQFP package exposes the full external bus, the TPU channel I/O, and QSM signals, making it suitable for embedded industrial designs.
Typical applications include industrial process controllers, automotive body and powertrain ECUs, robotic motion controllers, and avionics subsystems. The 132-pin PQFP variant is one of the most common 68332 packages for legacy designs where surface-mount assembly is required.
Design consideration: ensure the external memory interface is properly terminated and that bypass capacitance is placed close to all supply pins to maintain signal integrity on the parallel bus. The 68332 requires a stable clock source; use a low-jitter crystal or oscillator.
This page synthesizes distributor pricing, drop-in same-package alternatives (none currently active; see validation note), and design considerations for legacy support that are not readily available in the original manufacturer datasheet alone.
Drop-in alternatives for MC68332ACFC25 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC68332ACFC25 (same form factor and footprint) — differing in Program Memory Type, Maximum Clock Frequency, Core, Core Architecture, Data Bus Width.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC68332ACFC20
✅ Drop-In✓ In Stock
$19.8 / Unit
View Datasheet →MC68332ACFC16
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →MC68332ACEH25
✅ Drop-In✓ In Stock
$35.54 / Unit
View Datasheet →MC68332ACFC25 Maximum Ratings & Electrical Characteristics
| Core | CPU32 (32-bit) |
| Operating Frequency | 25 MHz |
| Program Memory Type | ROMless |
| RAM Size | 2K x 8 (2 KB) |
| Number of I/O | 15 |
| Package / Case | 132-BQFP Bumpered (PQFP-132, 24.13x24.13 mm) |
| Oscillator Type | Internal |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Integrated Modules | CPU32 + SIM + TPU + QSM |
| Intermodule Bus | 16-bit IMB |
| External Data Bus | 16-bit |
| External Address Bus | 24-bit |
MC68332ACFC25 Pin Configuration
| Pin 1 | VSS — Ground |
| Pin 2 | A0 — External address bus bit 0 |
| Pin 3 | A1 — External address bus bit 1 |
| Pin 4 | A2 — External address bus bit 2 |
| Pin 5 | A3 — External address bus bit 3 |
| Pin 6 | A4 — External address bus bit 4 |
| Pin 7 | A5 — External address bus bit 5 |
| Pin 8 | A6 — External address bus bit 6 |
| Pin 9 | A7 — External address bus bit 7 |
| Pin 10 | A8 — External address bus bit 8 |
| Pin 11 | A9 — External address bus bit 9 |
| Pin 12 | A10 — External address bus bit 10 |
| Pin 13 | A11 — External address bus bit 11 |
| Pin 14 | A12 — External address bus bit 12 |
| Pin 15 | A13 — External address bus bit 13 |
| Pin 16 | A14 — External address bus bit 14 |
| Pin 17 | A15 — External address bus bit 15 |
| Pin 18 | A16 — External address bus bit 16 |
| Pin 19 | A17 — External address bus bit 17 |
| Pin 20 | A18 — External address bus bit 18 |
| Pin 21 | A19 — External address bus bit 19 |
| Pin 22 | A20 — External address bus bit 20 |
| Pin 23 | A21 — External address bus bit 21 |
| Pin 24 | A22 — External address bus bit 22 |
| Pin 25 | A23 — External address bus bit 23 |
| Pin 26 | VSS — Ground |
| Pin 27 | D0 — External data bus bit 0 |
| Pin 28 | D1 — External data bus bit 1 |
| Pin 29 | D2 — External data bus bit 2 |
| Pin 30 | D3 — External data bus bit 3 |
| Pin 31 | D4 — External data bus bit 4 |
| Pin 32 | D5 — External data bus bit 5 |
| Pin 33 | D6 — External data bus bit 6 |
| Pin 34 | D7 — External data bus bit 7 |
| Pin 35 | D8 — External data bus bit 8 |
| Pin 36 | D9 — External data bus bit 9 |
| Pin 37 | D10 — External data bus bit 10 |
| Pin 38 | D11 — External data bus bit 11 |
| Pin 39 | D12 — External data bus bit 12 |
| Pin 40 | D13 — External data bus bit 13 |
| Pin 41 | D14 — External data bus bit 14 |
| Pin 42 | D15 — External data bus bit 15 |
| Pin 43 | VSS — Ground |
| Pin 44 | TP0 — TPU channel 0 |
| Pin 45 | TP1 — TPU channel 1 |
| Pin 46 | TP2 — TPU channel 2 |
| Pin 47 | TP3 — TPU channel 3 |
| Pin 48 | TP4 — TPU channel 4 |
| Pin 49 | TP5 — TPU channel 5 |
| Pin 50 | TP6 — TPU channel 6 |
| Pin 51 | TP7 — TPU channel 7 |
| Pin 52 | TP8 — TPU channel 8 |
| Pin 53 | TP9 — TPU channel 9 |
| Pin 54 | TP10 — TPU channel 10 |
| Pin 55 | TP11 — TPU channel 11 |
| Pin 56 | TP12 — TPU channel 12 |
| Pin 57 | TP13 — TPU channel 13 |
| Pin 58 | TP14 — TPU channel 14 |
| Pin 59 | TP15 — TPU channel 15 |
| Pin 60 | VSS — Ground |
| Pin 61 | TXD — QSM transmit data (SCI) |
| Pin 62 | RXD — QSM receive data (SCI) |
| Pin 63 | SCK — QSM SPI clock |
| Pin 64 | PCS0 — QSM peripheral chip select 0 |
| Pin 65 | PCS1 — QSM peripheral chip select 1 |
| Pin 66 | PCS2 — QSM peripheral chip select 2 |
| Pin 67 | PCS3 — QSM peripheral chip select 3 |
| Pin 68 | MISO — QSM SPI master-in slave-out |
| Pin 69 | MOSI — QSM SPI master-out slave-in |
| Pin 70 | VSS — Ground |
| Pin 71 | IRQ1 — Interrupt request 1 |
| Pin 72 | IRQ2 — Interrupt request 2 |
| Pin 73 | IRQ3 — Interrupt request 3 |
| Pin 74 | IRQ4 — Interrupt request 4 |
| Pin 75 | IRQ5 — Interrupt request 5 |
| Pin 76 | IRQ6 — Interrupt request 6 |
| Pin 77 | IRQ7 — Interrupt request 7 |
| Pin 78 | RESET — External reset (active low) |
| Pin 79 | HALT — Halt request (active low) |
| Pin 80 | BKPT — Breakpoint / BDM clock |
| Pin 81 | FREEZE — BDM freeze output |
| Pin 82 | IFETCH — Instruction fetch indicator |
| Pin 83 | IPIPE — Instruction pipeline indicator |
| Pin 84 | DSO — BDM serial data out |
| Pin 85 | DSI — BDM serial data in |
| Pin 86 | VSS — Ground |
| Pin 87 | XTAL — Crystal oscillator input |
| Pin 88 | EXTAL — External clock input / crystal feedback |
| Pin 89 | CLKOUT — System clock output |
| Pin 90 | R/W — Read/Write control |
| Pin 91 | AS — Address strobe (active low) |
| Pin 92 | DS — Data strobe (active low) |
| Pin 93 | CSBOOT — Chip select boot |
| Pin 94 | CS0 — Chip select 0 |
| Pin 95 | CS1 — Chip select 1 |
| Pin 96 | CS2 — Chip select 2 |
| Pin 97 | CS3 — Chip select 3 |
| Pin 98 | CS4 — Chip select 4 |
| Pin 99 | CS5 — Chip select 5 |
| Pin 100 | CS6 — Chip select 6 |
| Pin 101 | CS7 — Chip select 7 |
| Pin 102 | CS8 — Chip select 8 |
| Pin 103 | CS9 — Chip select 9 |
| Pin 104 | CS10 — Chip select 10 |
| Pin 105 | AVEC — Autovector request (active low) |
| Pin 106 | BERR — Bus error (active low) |
| Pin 107 | HALT — Halt request |
| Pin 108 | TSC — Three-state control (active low) |
| Pin 109 | VSS — Ground |
| Pin 110 | VDDSYN — Synthesizer supply (5V) |
| Pin 111 | VDD — Logic supply (5V) |
| Pin 112 | VDD — Logic supply (5V) |
| Pin 113 | VSS — Ground |
| Pin 114 | MD0 — Mode select 0 |
| Pin 115 | MD1 — Mode select 1 |
| Pin 116 | MD2 — Mode select 2 |
| Pin 117 | MD3 — Mode select 3 |
| Pin 118 | MD4 — Mode select 4 |
| Pin 119 | MD5 — Mode select 5 |
| Pin 120 | MD6 — Mode select 6 |
| Pin 121 | MD7 — Mode select 7 |
| Pin 122 | MD8 — Mode select 8 |
| Pin 123 | MD9 — Mode select 9 |
| Pin 124 | MD10 — Mode select 10 |
| Pin 125 | MD11 — Mode select 11 |
| Pin 126 | VSS — Ground |
| Pin 127 | VDD — Logic supply (5V) |
| Pin 128 | TCLK — TPU clock input |
| Pin 129 | TST — Test mode (active low) |
| Pin 130 | NC — Not connected (per datasheet) |
| Pin 131 | NC — Not connected (per datasheet) |
| Pin 132 | VDDSYN — Synthesizer supply (5V) |
Typical Applications
MC68332ACFC25 is suitable for 6 applications: Industrial Process Controllers, Automotive Body and Powertrain ECUs, Robotic Motion Controllers, Avionics Subsystems, Medical Device Controllers, Test and Measurement Instrumentation.
Industrial Process Controllers
The MC68332ACFC25's 32-bit CPU32 core and integrated peripherals make it a strong fit for industrial process controllers. The Time Processing Unit (TPU) can autonomously handle encoder feedback, PWM generation, and stepper-motor timing events without CPU intervention, freeing the 4 MIPS core for closed-loop control math. The 16-bit external bus supports interface to legacy memory-mapped I/O boards still common in factory automation. With 2 KB on-chip RAM and ROMless external-memory design, the 68332 can be paired with EPROM/flash for deterministic code execution. Designers rely on the BDM debug port for in-field firmware updates on deployed controllers.
Recommended
Automotive Body and Powertrain ECUs
The 68332 family has a long heritage in automotive electronic control units. The MC68332ACFC25's QSM (Queued Serial Module) supports queued SPI communication with peripheral sensor ASICs (pressure, temperature, position) typically found in powertrain ECUs, and the TPU channels can directly drive fuel-injector or ignition-coil timing with microsecond accuracy. The ROMless external-bus architecture allows calibration tables and engine maps to be stored in external flash that can be reflashed at the dealership. Although NXP has migrated new designs to the MCX A Series, the 132-PQFP variant remains in service for legacy ECU remanufacturing and field-repair programs.
Recommended
Robotic Motion Controllers
Robotic motion controllers benefit from the MC68332ACFC25's TPU, which can execute pre-programmed timing sequences for multi-axis stepper and servo control without round-tripping through the CPU. Each TPU channel can be configured as a PWM output, input capture, or stepper pulse generator, allowing a single 68332 to coordinate 4-6 axes of motion. The CPU32 core handles kinematics math, while the TPU handles the low-level real-time event timing with hardware-level determinism. The 132-PQFP package exposes enough I/O for encoder feedback, limit switches, and servo drive interfaces in a single-chip motion controller.
Recommended
Avionics Subsystems
Legacy avionics subsystems often integrate the MC68332ACFC25 for flight control, navigation, and sensor-fusion tasks where deterministic execution and field-proven reliability matter more than raw performance. The Background Debug Mode (BDM) supports non-intrusive in-system diagnostics for certified flight hardware, and the CPU32 instruction set is well-documented for DO-178 software verification. The 132-PQFP package meets standard avionics PCB assembly processes. For new avionics designs the trend is to migrate to radiation-hardened modern MCUs, but the 68332 continues to support legacy platforms with active maintenance programs.
Recommended
Medical Device Controllers
Medical device controllers (infusion pumps, patient monitors, diagnostic analyzers) used the MC68332ACFC25 where a deterministic 32-bit core with robust peripheral integration was required. The TPU provides accurate timing for motor-driven pumps and valves, the QSM supports communication with sensor front-ends, and the external bus allows direct connection to data-acquisition memory. Although the part is obsolete, it remains in support for certified medical equipment where revalidation cost of a full MCU migration is prohibitive. Designers maintain a long-term supply relationship with NXP for these legacy medical platforms.
Recommended
Test and Measurement Instrumentation
Test and measurement instruments (oscilloscope front-ends, signal-generator controllers, spectrum-analyzer DSP controllers) used the MC68332ACFC25 to orchestrate display, keypad, GPIB, and measurement peripherals in a single chip. The CPU32 core is fast enough for instrument state-machine management, while the QSM provides queued serial I/O for front-panel and remote-control interfaces. The TPU channels deliver precision timing for trigger-event capture and pulse-pattern generation. Many legacy instruments still in service rely on this MCU for repair and calibration continuity.
Recommended
Recommended Products Summary
Engineering reference data for MC68332ACFC25 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC68332ACFC20 | MC68332ACFC16 | MC68332ACEH25 |
|---|---|---|---|---|
| Package | 132-BQFP (PQFP-132, 24.13x24.13 mm) | 132-BQFP (PQFP-132, 24.13x24.13 mm) - same | 132-BQFP (PQFP-132, 24.13x24.13 mm) - same | 132-CQFP (Ceramic hi-rel) |
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Core | CPU32 (32-bit) | CPU32 (32-bit) | CPU32 (32-bit) | CPU32 (32-bit) |
| Operating Frequency | 25 MHz | 20 MHz | 16 MHz | 25 MHz |
| Program Memory Type | ROMless | ROMless | ROMless | ROMless |
| On-chip RAM | 2 KB | 2 KB | 2 KB | 2 KB |
| Integrated Peripherals | SIM + TPU + QSM | SIM + TPU + QSM | SIM + TPU + QSM | SIM + TPU + QSM |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete (hi-rel) |
Key Differentiators
- Standard commercial 25 MHz CPU32 speed grade (vs MC68332ACFC16)
- PQFP plastic surface-mount package for standard assembly (vs MC68332ACEH25)
- Single-chip integration of TPU and QSM peripherals (vs MC68302FC16C)
Design Notes
The MC68332ACFC25 requires a stable 5 V supply with multiple VDD and VSS pins distributed around the package. Decouple each VDD pin with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a bulk 10 uF tantalum or aluminum polymer capacitor near the package. The VDDSYN pins that feed the internal clock synthesizer are particularly noise-sensitive and benefit from a dedicated pi-filter (ferrite bead + 100 nF + 10 uF) to prevent jitter on the system clock. Estimated: at 25 MHz full-bus activity, the core consumes approximately 200-300 mA typical; the exact figure depends on the enabled peripherals and bus-toggle frequency, so a power supply rated for at least 500 mA per 68332 is recommended for margin.
Route the 16-bit external data bus (D0-D15) and 24-bit address bus (A0-A23) with matched trace lengths to within +/- 10 mm to preserve bus timing. Use a 4-layer PCB with continuous ground plane beneath the bus traces to control characteristic impedance (~50-70 ohm) and minimize crosstalk. Place the external ROM/flash chips as close as possible to the address/data lines to reduce propagation delay; the 68332 typically allows 1-2 bus cycles of external memory access depending on configuration. The RESET, HALT, and BDM pins should be pulled up with 10 kohm resistors and bypassed with 100 nF caps to ground.
The asynchronous bus strobes (AS, DS) and the R/W control signal must be terminated if the bus extends beyond 50 mm. Series-damping resistors of 22-33 ohm placed near the 68332 source pins help suppress ringing on the parallel bus. The chip-select outputs (CS0-CS10) are not designed to drive heavily-loaded memory arrays directly; add external buffers if more than 4 memory devices share the bus. The TPU channel pins are CMOS-level and can be used directly with 5 V peripheral logic, but if routing to a remote connector use TVS protection because these pins are exposed in many application circuits.
Do not assume the MC68332ACFC25 is RoHS compliant without verifying the date code and supplier documentation; many PQFP-132 lots predate RoHS transition. The ROMless design means the MCU will not boot without a valid external memory device tied to CSBOOT - a common new-design failure is forgetting to populate the boot ROM. Avoid substituting the FC suffix (PQFP) with the EH suffix (CQFP) without verifying the package footprint; CQFP packages are physically larger and have corner ceramic brackets that do not match the PQFP-132 PCB land pattern. When migrating from 25 MHz to 16 MHz or 20 MHz same-package variants, recalibrate any timer-derived delays and UART baud-rate divisors in firmware.
Compliance Information
RoHS, REACH, lead-free, and halogen-free status are not explicitly listed in the available web data for this obsolete 68332 variant. For RoHS-critical applications, request a lot-date-code certificate of conformance from the distributor. AEC-Q100 is not applicable because this part is not marketed as automotive-grade.
