MC68332ACEH16 - 32-Bit 16MHz CPU32 MCU | NXP | Industrial
N.º da peça: MC68332ACEH16 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $50.42 | $50,42 |
| 10 | $47.9 | $479,00 |
| 100 | $45.38 | $4.538,00 |
| 500 | $42.86 | $21.430,00 |
| 1.000 | $40.34 | $40.340,00 |
MC68332ACEH16 Visão geral
A 32-bit embedded microcontroller combines a processor core, memory, and multiple peripheral subsystems on a single silicon die, interfacing through a common intermodule bus (IMB). The M683xx family pioneered this modular architecture, allowing the same CPU to be paired with different peripheral sets. Microcontrollers of this class sit above 8-bit MCUs in the hierarchy, serving industrial control, automotive, and communication equipment that require 32-bit data manipulation with deterministic real-time behavior.
Key features of the MC68332ACEH16 include the time processing unit (TPU), a co-processor dedicated to timing operations such as PWM generation, input capture, and period measurement with minimal CPU intervention. The queued serial module (QSM) provides both a queued serial peripheral interface (QSPI) and a serial communications interface (SCI). The system integration module (SIM) handles clock generation, external bus control, chip selects, and system protection functions. Being ROMless, the device executes code from external memory via its 32-bit external bus, giving designers full firmware flexibility.
Architecturally, the CPU32 core is an upward-compatible evolution of the classic 68020-derived instruction set, optimized for embedded control with additional low-power STOP modes and table lookup/interpolate instructions. Its deterministic interrupt structure and IMB-based module coupling deliver predictable real-time latency, a critical property for motor control and timing-critical industrial systems.
Typical applications include industrial automation controllers, automotive engine and body control legacy platforms, network communication equipment, and test instrumentation. The TPU makes the part particularly strong in multi-channel timing applications such as injector drive, stepper control, and encoder processing.
Design consideration: because the part is ROMless and 5V-only, new designs must budget an external EPROM/flash and level-shifting for modern 3.3V peripherals. Note the 16 MHz grade vs the 25 MHz variant, as firmware timing loops differ.
This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-10-18.
Alternativas drop-in para MC68332ACEH16 — 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 MC68332ACEH16 (mesmo formato e footprint) — diferindo em Package, Program Memory Type, Peripherals, Core, Maximum Clock Frequency.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68332GCEH16
✅ Drop-In✓ Em estoque
$38.75 / unidade
Ver ficha técnica →MC68332AMEH16
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68332ACFC16
✅ Drop-In✓ Em estoque
$9.95 / unidade
Ver ficha técnica →MC68332VFC16
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68LK332ACEH16
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →MC68332ACEH20
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MC68332ACEH25
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$35.54 / unidade
Ver ficha técnica →MC68332ACEH16 Classificações máximas e características elétricas
| Core Processor | CPU32 (M683xx) |
| Core Size | 32-Bit |
| Frequência máxima de clock | 16 MHz |
| Program Memory Type | ROMless (external memory) |
| RAM Size | 2 KB |
| Tensão de alimentação | 5 V |
| Peripherals | TPU, QSM (QSPI + SCI), SIM |
| Largura do barramento de dados | 32 bit |
| Intermodule Bus | IMB (common intermodule bus) |
| Encapsulamento | 132-PQFP (24.13 x 24.13 mm) |
| Tipo de montagem | Surface Mount |
| Packaging | Tray |
| Status do ciclo de vida | End of Life (per NXP product page) |
| Manufacturer Heritage | Motorola / Freescale Semiconductor / NXP |
Guia de Configuração de Pinos do MC68332ACEH16 132-pqfp (24.13 x 24.13 mm)
Configuração de pinos para MC68332ACEH16 (pacote 132-pqfp (24.13 x 24.13 mm)). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para MC68332ACEH16.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MC68332ACEH16 é adequado para 6 aplicaçãos: Industrial Automation Controllers, Automotive Legacy Engine and Body Control, Communication and Networking Equipment, Test and Measurement Instrumentation, Motor Control and Drive Systems, Embedded Legacy System Maintenance and Spares.
Industrial Automation Controllers
The MC68332ACEH16 fits industrial PLC and motion-controller boards because its 16 MHz CPU32 core delivers deterministic 32-bit control loops while the TPU offloads multi-axis PWM and encoder counting without stealing CPU cycles. In a typical design the ROMless bus interface boots from external flash mapped by SIM chip selects, letting integrators field-update control firmware without changing silicon. Its 5V I/O directly drives legacy industrial sensors, relays, and opto-isolated inputs that 3.3V MCUs cannot interface without level shifting. The QSPI port links to ADCs and gate drivers, while the SCI connects to operator panels over RS-485/RS-232. Performance consideration: budget external memory access cycles at 16 MHz when sizing loop-update rates, and use TPU-scheduled tasks for sub-microsecond-accurate outputs that software loops cannot guarantee.
Recomendado
Automotive Legacy Engine and Body Control
Many installed vehicle ECUs were built around the M683xx family, and the MC68332ACEH16 remains the service-repair choice for these boards. The TPU natively generates injector pulse-width modulation, ignition dwell timing, and idle-stepper drive with hardware-level precision, while the SIM's system protection (bus monitor, watchdog) meets the fault-tolerance expectations of automotive powertrain designs. Its 5V supply matches automotive sensor and actuator signaling of that era directly. Because the part is ROMless, remanufacturers reflash external EPROM/flash with updated calibration data - a key advantage over masked-ROM contemporaries. Performance consideration: when repairing at 16 MHz rather than 25 MHz variants, recalibrate any cycle-counted crank-angle timing tables, since a 36 percent clock reduction shifts all software-derived schedules proportionally.
Recomendado
Communication and Networking Equipment
The MC68332ACEH16 served in industrial modems, protocol converters, and embedded network nodes where the QSM's dual serial engines shine: the SCI handles asynchronous RS-232/RS-485 links up to moderate baud rates, while the QSPI sequentially services multiple peripheral ICs through a single 4-wire bus with a 16-entry queue that reduces interrupt load. The 32-bit core executes protocol stacks (modbus, proprietary fieldbus) with headroom over 8-bit parts, and SIM chip selects simplify memory-mapping dual-port RAM for backplane communication. Its 5V I/O directly matches legacy line-driver and optocoupler circuitry. Performance consideration: at 16 MHz, maximum sustained SCI throughput is bounded by the core clock divider chain, so verify baud-rate error against the external crystal frequency chosen for the system rather than assuming modern UART tolerance bands.
Recomendado
Test and Measurement Instrumentation
Bench instruments, data loggers, and automated test fixtures from the 1990s frequently used the MC68332ACEH16 as their main controller. The TPU's input-capture channels timestamp external events with hardware precision - essential for frequency counters and interval analyzers - while output-compare channels generate stimulus signals with sub-microsecond jitter. The QSPI scans multiple ADCs through one queued transaction, synchronizing multi-channel acquisitions without CPU-timed bit-banging. ROMless execution from external memory let instrument vendors ship field-upgradable firmware and calibrator tables stored alongside program code. Its 5V bus interfaces directly with the TTL-level front-end logic common in instruments of this generation. Performance consideration: for precise reciprocal counting, route the measurement signal to a TPU channel rather than a software interrupt, since interrupt latency at 16 MHz is many CPU cycles and varies with bus contention from external memory fetches.
Recomendado
Motor Control and Drive Systems
The MC68332ACEH16 excels in multi-motor drive boards because the TPU executes predefined microcode functions - PWM with dead-time, stepper sequencing, and hall/encoder decoding - entirely in hardware, sustaining accurate commutation even while the CPU32 core runs the current-loop and supervisory software. Sixteen TPU channels can service several motors or motor-plus-fan groups from one chip, replacing discrete timer arrays. The SIM watchdog and bus monitor provide the fault containment drives require, and 5V I/O interfaces legacy gate-driver optocouplers directly. Performance consideration: TPU channel service time depends on the selected microcode function and the scheduled rate (TPUR registers derived from system clock), so confirm at 16 MHz that commutation periods and dead-time resolution meet your motor specification, especially when substituting from a 25 MHz design where TPU scheduling was originally tuned.
Recomendado
Embedded Legacy System Maintenance and Spares
Beyond new application design, a primary ongoing use of the MC68332ACEH16 is sustaining engineering for installed systems - factory lines, medical lab equipment, avionics test rigs, and telecom shelves - whose firmware is CPU32-specific. Repair shops use this ROMless device paired with flashed external memory to rebuild controller boards exactly to original behavior, avoiding costly requalification of the whole machine. The pin-compatible M683xx variants (GCEH16 green grade, AMEH16 extended temperature) let buyers choose by lot availability and environmental rating without touching the schematic. Performance consideration: authenticate broker-sourced EOL parts by date code and marking inspection, since obsolete microcontrollers are frequent counterfeit targets; prefer franchised distributors holding original trays, and specify the 132-PQFP outline when ordering to avoid FC/EH package-code mismatches on existing PCB footprints.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68332ACEH16 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC68332GCEH16 | MC68332AMEH16 | MC68332ACFC16 | MC68332ACEH25 |
|---|---|---|---|---|---|
| Package | 132-PQFP (24.13 x 24.13 mm) | 132-PQFP (24.13 x 24.13 mm) - same | 132-PQFP (24.13 x 24.13 mm) - same | 132-PQFP - same family, verify body code | 132-PQFP (24.13 x 24.13 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (Motorola/Freescale heritage) | NXP Semiconductors |
| Core | CPU32 (M683xx), 32-bit | CPU32, 32-bit | CPU32, 32-bit | CPU32, 32-bit | CPU32, 32-bit |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 25 MHz |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) |
| Peripherals | TPU, QSM (QSPI+SCI), SIM | TPU, QSM, SIM | TPU, QSM, SIM | TPU, QSM, SIM | TPU, QSM, SIM |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Lifecycle Status | End of Life | End of Life | End of Life | End of Life | End of Life |
Principais diferenciais
- TPU timing co-processor (vs MC9S12XEQ384CAG)
- ROMless external-memory flexibility (vs MC68332GCEH16)
- 16 MHz low-power grade (vs MC68332ACEH25)
- 5V-native I/O (vs MCF5235CVM150J)
Notas de projeto
The MC68332ACEH16 requires a regulated 5V supply. Decouple VDD and VSS pin pairs with 0.1 uF ceramic capacitors placed as close as possible to each power pin, and add bulk 10 uF capacitance near the device. Because the part is EOL and often sourced as old stock, verify supply-current behavior at power-up with a current-limited bench supply before committing a repaired board - degraded lots can show elevated quiescent current. Estimated: typical M683xx-class core current at 16 MHz/5V is in the tens-to-low-hundreds of mA range; confirm the exact figure in the manufacturer datasheet for your derating analysis.
As a ROMless device, the external bus (address, data, chip selects, R/W, clock) dominates the PCB. Keep external EPROM/flash traces as short as practicable and match lengths on the data bus at 16 MHz to minimize skew; add series termination (22-33 ohm) on clock and strobe lines if ringing appears. The 132-PQFP exposed lead design needs a conventional gull-wing footprint - do not reuse footprints intended for other 132-pin package codes without checking the 24.13 x 24.13 mm body drawing. Ensure the MODCLK and reset configuration pins are strapped per the datasheet boot-mode table.
Three recurring pitfalls: (1) clock substitution - firmware migrated between 16 MHz and 25 MHz M68332 parts breaks cycle-counted delays, SCI baud dividers, and TPU schedules; recompute all time-critical constants. (2) package-code confusion - EH and FC ordering codes denote different body/lead-frame options; validate the mechanical outline against your existing PCB before drop-in. (3) counterfeit EOL stock - buy from franchised distributors (DigiKey, Mouser, LCSC) and request date-code photos and certificates of conformance when using brokers, since obsolete CPU32 devices are common counterfeit targets.
Informações de conformidade
Part predates RoHS; distributor listings show RoHS details requiring per-lot verification. The green-grade MC68332GCEH16 drop-in exists as the RoHS-compliant variant. Consult NXP product change notices for authoritative per-lot compliance data.
