MC68332ACFC16 - 32-Bit Modular MCU 16MHz ROMless 132-PQFP | NXP
Référence : MC68332ACFC16 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.2 | $162,00 |
| 100 | $13.85 | $1 385,00 |
| 500 | $11.4 | $5 700,00 |
| 1 000 | $9.95 | $9 950,00 |
MC68332ACFC16 Présentation
A modular microcontroller is a class of highly integrated 32-bit microprocessor that combines a CPU core with reconfigurable peripheral modules on a common intermodule bus (IMB). Within the broader semiconductor hierarchy, the M68332 family sits between standalone microcontrollers and application-specific microcontrollers, positioned in industrial control and automotive powertrain segments where real-time deterministic interrupt response and on-chip peripheral integration reduce BOM cost and PCB complexity compared to multi-chip designs.
Key features include 32-bit data path with 24-bit addressing, 2 KB of on-chip SRAM, ROMless external memory interface, 15 dedicated I/O lines plus multiplexed peripheral I/O, two serial interfaces via the QSM (one SCI for UART, one SPI), seven external interrupt sources, and the distinctive Time Processing Unit (TPU) which is a dedicated microcoded engine for complex timing I/O without CPU intervention. The chip is manufactured on a 0.8 micron HCMOS process and operates from a single 5V supply.
The architecture centers on the CPU32 core, an evolution of the Motorola 68000 instruction set, executing M68000 instructions plus new table-lookup and interpolate commands tailored for DSP-style operations. The TPU handles complex timing tasks (PWM generation, period measurement, quadrature decode) autonomously, freeing the CPU for control loops and communication stacks. Three independent chip-select outputs and a watchdog timer are integrated in the SIM block.
Typical applications include automotive engine and transmission control units, industrial automation controllers, robotic motion controllers, CAN node gateways via add-on CAN modules, and legacy avionics subsystems. The wide 5V operating range with industrial -40C to +85C temperature grading makes the MC68332ACFC16 particularly suited to harsh-environment designs.
When designing with this device, ensure each VDD/VSS pair is decoupled with a 100 nF ceramic capacitor placed within 5 mm of the pin. The crystal oscillator circuit requires careful PCB layout to meet the 16.78 MHz jitter spec; refer to the manufacturer's hardware design notes for guard trace and ground island recommendations.
This page synthesizes distributor pricing, drop-in pin-compatible M68332 family alternatives, and practical PCB layout guidance not found in the manufacturer datasheet alone, helping engineers source and qualify this classic 32-bit MCU for both new designs and long-lifecycle maintenance programs.
Alternatives de remplacement direct pour MC68332ACFC16 — 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 MC68332ACFC16 (même facteur de forme et même empreinte) — différant par Maximum Clock Frequency, Program Memory Type, Core Architecture, Package, Bus Width.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68332ACFC25
✅ Remplacement direct✓ En stock
$18.95 / unité
Voir la fiche technique →MC68332GCFC16
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68332ACEH16
✅ Remplacement direct✓ En stock
$40.34 / unité
Voir la fiche technique →MC68332ACFC16 Valeurs maximales et caractéristiques électriques
| Core Architecture | CPU32 (M68000 family) |
| Largeur du bus de données | 32-bit |
| Address Bus Width | 24-bit |
| Fréquence d'horloge maximale | 16.78 MHz |
| On-chip RAM | 2 KB |
| Program Memory Type | ROMless (external memory interface) |
| Boîtier | 132-PQFP (Bumpered QFP) 24.13 x 24.13 mm |
| Number of I/O Lines | 15 (dedicated) + multiplexed peripheral I/O |
| Number of External Interrupts | 7 |
| Number of Serial I/Os | 3 (QSM: 1 SCI + 1 SPI + 1 QSPI sub-module) |
| Tension d'alimentation de fonctionnement | 5 V |
| Plage de température de fonctionnement | -40 C to +85 C (industrial) |
| Type de montage | Surface Mount |
| Peripheral Modules | TPU, QSM, SIM, CTM4 |
| Statut RoHS | unknown |
Configuration des broches de MC68332ACFC16
| Broche 1 | VDDH — 5 V supply for I/O drivers (per datasheet) |
| Broche 10 | DATA[0] — External data bus bit 0 |
| Broche 20 | ADDR[8] — External address bus bit 8 |
| Broche 33 | TCLK — Test clock input |
| Broche 50 | VSS — Ground reference (one of multiple VSS pins) |
| Broche 66 | TPU channel 0 — Time Processing Unit channel 0 timing I/O |
| Broche 80 | QSM primary TXD — Queued Serial Module transmit data |
| Broche 90 | IRQ[6] — External interrupt request 6 |
| Broche 100 | CSBOOT — Chip-select boot area (SIM controlled) |
| Broche 110 | MODCLK — Modulus Clock output |
| Broche 121 | XTAL — Crystal oscillator input |
| Broche 132 | RESET — Active-low reset input |
Applications typiques
MC68332ACFC16 convient pour 6 applications: Automotive Engine Control Unit (ECU), Industrial Robotic Motion Controller, Industrial CAN Gateway / Protocol Bridge, Test and Measurement Instrumentation, Avionics Subsystem Controller, Stepper and Brushless DC Motor Drive.
Automotive Engine Control Unit (ECU)
The MC68332ACFC16's Time Processing Unit (TPU) makes it well suited to automotive engine control, where it executes crankshaft position sensing, fuel injector pulse timing, and ignition dwell control autonomously from the CPU32 core. Operating from a single 5 V rail with an industrial -40C to +85C temperature grade per the NXP datasheet MC68332TS, it tolerates under-hood thermal stress in legacy applications. The 16.78 MHz CPU32 core computes real-time fuel maps, while the QSM handles diagnostics communication with the powertrain control bus.
Recommandé
Industrial Robotic Motion Controller
The MC68332ACFC16's TPU directly drives multi-axis servo motor control loops in industrial robotics, where it generates quadrature-decoded feedback signals and PWM outputs at microsecond resolution without loading the CPU32 core. With its modular 32-bit architecture and 132-PQFP mechanical footprint, the controller board can host up to sixteen TPU channels per chip via time-multiplexed I/O. The CPU32 then executes high-level trajectory planning and host communication, freeing peripheral interrupt service routines from real-time deadlines as outlined in the NXP MC68332 technical summary.
Recommandé
Industrial CAN Gateway / Protocol Bridge
The MC68332ACFC16 bridges legacy industrial protocols to CAN buses via its QSM (Queued Serial Module) and external CAN controllers. According to the NXP datasheet, the QSM provides one full-duplex SCI UART and one SPI port, both of which can be linked to external CAN transceivers like the MC33388 or MCP2515 to implement a multi-protocol industrial gateway. The 24-bit address bus accommodates large bridging tables, and the modular IMB allows add-on peripheral expansion within the M68332 family.
Recommandé
Test and Measurement Instrumentation
The MC68332ACFC16's deterministic interrupt response and TPU precision timing make it well matched to legacy test and measurement instruments such as automatic test equipment, motor testers, and process analyzers. The 32-bit data path with 24-bit address range allows direct memory mapping of large waveform capture buffers. The ROMless architecture lets manufacturers tool custom boot loaders and calibration firmware in external Flash, while the 5 V supply tolerance accommodates older analog front ends still common in lab gear.
Recommandé
Avionics Subsystem Controller
The MC68332ACFC16's wide 5 V tolerance, predictable interrupt latency, and field-proven reliability have sustained its use in avionics subsystems such as fuel controllers, environmental controllers, and flight-deck indicator drivers. The -40C to +85C industrial temperature grade (per electronicsurplus and Partstack) covers most pressurized and unpressurized equipment bays. Long-term Rochester Electronics support allows continued production of legacy avionics modules through their 30-year service window.
Recommandé
Stepper and Brushless DC Motor Drive
The MC68332ACFC16's TPU executes microstepping algorithms and trapezoidal commutation for stepper and BLDC motors by offloading the per-sample workload from the CPU32 core. According to the NXP MC68332TS datasheet, the TPU includes pre-programmed microcoded functions such as PWM, period measurement, and quadrature decode, which can be chained to handle multi-phase commutation. Designers pair the MC68332 with external gate drivers (e.g., IR2130) to form a complete digital motor controller in CNC and process automation equipment.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68332ACFC16 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC68332ACFC25 | MC68332GCFC16 | MC68332ACEH16 |
|---|---|---|---|---|
| Package | 132-PQFP (Bumpered) | 132-PQFP (Bumpered) - same | 132-PQFP (Bumpered) - same | 132-PQFP (Bumpered) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Maximum Clock Frequency | 16.78 MHz | 25 MHz (+49%) | 16.78 MHz (same) | 16.78 MHz (same) |
| Core | CPU32 | CPU32 | CPU32 | CPU32 |
| On-chip RAM | 2 KB | 2 KB | 2 KB | 2 KB |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
Principaux différenciateurs
- Integrated Time Processing Unit (TPU) for hardware-assisted timing (vs MC68334GFC16)
- Higher-speed 25 MHz drop-in upgrade available within family (vs MC68332ACFC25)
- 24-bit address bus and 32-bit data bus for large memory maps (vs MC68331CFC25B1)
Notes de conception
Place 0.1 uF ceramic decoupling capacitors within 5 mm of every VDD/VSS pin pair on the 132-PQFP footprint. Add a bulk 10 uF tantalum at the board entry point. The 5 V analog supply (VDDA) used by the PLL oscillator section must be isolated from VDD with a ferrite bead and its own 0.1 uF + 10 uF decoupling network per NXP hardware design notes to minimize jitter on the 16.78 MHz system clock.
Layout the crystal oscillator circuit on a dedicated ground island connected to the chip VSS pin only at a single point. Keep the XTAL and EXTAL traces short (under 10 mm) and symmetric, with guard traces grounded on both sides. Estimated: a 1 mm trace length mismatch at 16.78 MHz causes approximately 5 to 10 ps of duty-cycle asymmetry, which can upset the PLL lock range. Use a 4-layer board with a continuous ground plane beneath the MCU for noise immunity.
Do not confuse the MC68332ACFC16 with the pin-incompatible but otherwise similar MC68334GFC16 - the MC68334 lacks the full TPU subsystem and substitutes a Single-Chip Integration Module (SCIM), so existing TPU code will not run on the MC68334. Verify on existing tooling that the 'CFG16' suffix matches the 132-PQFP package rather than the smaller 132-pin QFP-tray or 144-pin LQFP variants; a footprint mismatch is the most common rework driver in legacy boards.
Informations de conformité
Part is obsolete from Motorola / NXP / Freescale. Compliance data not consistently reported by remaining-stock distributors as of 2026-10-17. AEC-Q100 qualification not applicable to original MC68332 family; automotive-grade variants existed under different suffixes.
