MC68332GCEH25 - 32-Bit 25MHz CPU32 MCU | NXP | Automotive
MPN： MC68332GCEH25 ✗ 停產MC68332GCEH25 概覽
A 32-bit microcontroller is a complete computing system on a single chip, combining a processor core, memory, and peripherals. Within the power-management and embedded-control hierarchy, the MC68332 belongs to the Motorola 68000 family lineage (M68300 series), positioned above 8-bit and 16-bit MCUs for applications needing high-performance data manipulation alongside deterministic timing control.
Key features include the 25 MHz CPU32 core executing 68020-like instructions, the TPU for time-critical tasks (PWM, engine timing, quadrature decode) offloaded from the CPU, the QSM providing a queued serial peripheral interface (QSPI) and SCI UART, and the intermodule bus (IMB) that ties standard modules together. The ROMless (G suffix) architecture requires external EPROM/FLASH, offering full code flexibility for development and low-volume production.
Architecturally, the device is assembled from independent modules communicating over the IMB, a modular approach that let Freescale scale the M683xx family. The 5V automotive-qualified construction and industrial temperature support made it a mainstay in engine control, transmission controllers, and industrial automation through the 1990s and 2000s.
Typical applications include automotive engine and transmission control units, industrial motor drives, factory automation controllers, and legacy aerospace/military systems that standardize on the 68332 platform.
Design consideration: because this part is ROMless, budget external memory bus timing carefully at 25 MHz; if a slower 16 MHz device is substituted, system clock and TPU configurations must be revalidated. Note that NXP has declared this part End of Life.
This page adds value beyond the datasheet by consolidating EOL status, drop-in replacement candidates, distributor sourcing links, and practical migration guidance not found in the manufacturer documentation.
直接替換替代品，適用於 MC68332GCEH25 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC68332GCEH25 （相同外形與佔位） — 差異在於 Package, Core, Peripherals, Maximum Clock Frequency, Program Memory Type.
MC68332ACEH25
✅ 直接替換聯絡詢價
查看資料表 →MC68332GCFC25
✅ 直接替換📋 參考替代品（不在目錄中）
MC68331CEH25
✅ 直接替換聯絡詢價
查看資料表 →MC68332ACEH16
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC68332GCEH25 最大額定值與電氣特性
| Core Processor | CPU32 (M683xx) |
| Core Size | 32-Bit |
| 最大時脈頻率 | 25 MHz |
| Program Memory Type | ROMless (external memory) |
| SRAM | 2 KB |
| 供應電壓 | 5 V |
| Peripherals | TPU, QSM, SIM |
| TPU Channels | 16 (Time Processing Unit) |
| Serial Interfaces | QSPI, SCI (QSM) |
| 封裝 | 132-PQFP (24.13 x 24.13 mm) |
| 安裝類型 | Surface Mount |
| Architecture | Modular via Intermodule Bus (IMB) |
| Application Grade | Automotive |
| Packaging | Tray |
| 生命週期狀態 | End of Life (per NXP product page) |
MC68332GCEH25 132-pqfp (24.13 x 24.13 mm) 腳位配置指南
MC68332GCEH25（132-pqfp (24.13 x 24.13 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC68332GCEH25.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC68332GCEH25 適用於 6 應用s: Automotive Engine Control Units, Industrial Motor Drives and Automation, Legacy Aerospace and Defense Systems, Embedded Development and Prototyping, Test and Measurement Instrumentation, Networking and Communication Equipment.
Automotive Engine Control Units
The MC68332GCEH25 was a cornerstone of automotive engine and powertrain control throughout the 1990s and 2000s. Its 16-channel Time Processing Unit autonomously handles crankshaft angle timing, fuel injector pulse-width modulation, and ignition scheduling without CPU intervention, while the 25 MHz CPU32 core executes the control algorithm. The queued serial module links to sensors and diagnostics over QSPI/SCI. For legacy ECUs still in service, sourcing pin-compatible MC68332 variants such as the MC68332ACEH25 preserves the validated board and firmware. The 5V automotive-grade construction tolerates harsh load-dump electrical environments typical of vehicle harnesses.
推薦
Industrial Motor Drives and Automation
In industrial drives, robotics, and factory automation controllers, the MC68332GCEH25 pairs the 25 MHz CPU32 core with the TPU's deterministic PWM generation and quadrature-encoder decoding, offloading hard real-time tasks from software. The QSPI interfaces to ADCs, gate drivers, and supervisor devices over a compact serial bus, while the external memory bus supports boot code in EPROM/FLASH. Because the part is ROMless, firmware can be updated by swapping external memory - valuable for long-lived industrial equipment. Designs continuing production should evaluate remaining MC68332 stock or migrate to ColdFire MCF52xx parts such as the MCF5235 for comparable peripheral integration.
推薦
Legacy Aerospace and Defense Systems
Many aerospace, avionics, and defense platforms standardized on the MC68332 because of its modular architecture, 5V robustness, and long silicon availability. In these systems the CPU32 executes flight or mission control code from external PROM while the TPU manages servo loops, actuator PWM, and sensor timing with hardware determinism. Certification constraints make firmware freezes common, so maintainers seek exact pin-compatible replacements like the MC68332ACEH25 rather than redesigns. Since the part is End of Life, procurement teams should secure remaining traceable distributor stock (DigiKey/Mouser) and qualify stored inventory before it disappears from authorized channels.
推薦
Embedded Development and Prototyping
The ROMless 'G' variant of the MC68332 was favored for development because program code resides in external memory, allowing rapid code iteration by reprogramming EPROM or FLASH without mask changes. Developers pair the device with external FLASH, SRAM, and a BDM (background debug mode) interface, using the QSPI for quick peripheral bring-up. The TPU provides a rich playground for learning time-critical embedded techniques - PWM, input capture, and step-motor control - all in silicon. University labs and vintage-computing enthusiasts also use the 68332 to teach 68000-family architecture and to restore classic instrumentation.
推薦
Test and Measurement Instrumentation
Bench instruments, data loggers, and industrial test fixtures built around the MC68332GCEH25 benefit from its external memory bus (for large lookup tables and firmware in FLASH), the TPU for precise stimulus timing and capture, and the SCI UART for host communication. The 25 MHz CPU32 delivers adequate throughput for instrument state machines and calibration math, while chip selects from the SIM simplify memory-mapped peripheral design. When servicing this installed base, technicians can substitute pin-compatible MC68332 variants without altering calibrations stored in external NVRAM, keeping instruments in specification with minimal downtime.
推薦
Networking and Communication Equipment
Legacy telecom and industrial networking cards used the MC68332GCEH25's QSM to bridge serial protocols: the QSPI Talking to line codecs, SLICs, and ADCs, and the SCI providing maintenance console links. The external bus supports substantial packet buffers in external SRAM, and TPU channels generate framing or bit-rate clocks deterministically. The 5V operation simplified interfacing with older bipolar line-card components. For boards still deployed in field equipment, the practical sustainment path is authorized remaining stock of MC68332 variants; for refreshed designs, ColdFire or ARM Cortex-M parts reduce power and cost while keeping the serial architecture.
推薦
推薦產品摘要
工程參考資料，適用於 MC68332GCEH25 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC68332ACEH25 | MC68332GCFC25 | MC68331CEH25 | MC68332ACEH16 |
|---|---|---|---|---|---|
| Package | 132-PQFP (24.13 x 24.13 mm, EH) | 132-PQFP (EH) - same | 132-PQFP (CFC) - same die, different suffix outline | 132-PQFP (EH) - same | 132-PQFP (EH) - same |
| Brand | NXP Semiconductors (Freescale/Motorola) | NXP Semiconductors | NXP Semiconductors (Motorola legacy) | NXP Semiconductors | NXP Semiconductors |
| Core / Max Clock | CPU32, 25 MHz | CPU32, 25 MHz | CPU32, 25 MHz | CPU32, 25 MHz | CPU32, 16 MHz |
| Program Memory | ROMless (external) | Mask ROM option / external | ROMless (external) | ROMless (external) | Mask ROM option / external |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| TPU (16 channels) | Yes | Yes | Yes | No | Yes |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Firmware Change Needed | - | None (ROMless operation identical) | None (verify footprint) | Yes - TPU code must be removed | No, but bus/TPU timing revalidation required |
主要差異化特點
- Integrated 16-channel TPU for hard real-time timing (對比MC68331CEH25)
- ROMless flexibility for development and low-volume builds (對比MC68332ACEH25)
- 25 MHz maximum clock within the family (對比MC68332ACEH16)
設計說明
This part is End of Life: before committing it to any build, verify date codes and authenticity (EOL parts attract counterfeits). When substituting MC68332ACEH25 for the G variant, confirm your board does not rely on the mask ROM window - in ROMless/external-memory operation the two are identical, but boot code must not reference on-chip ROM addresses. Also confirm the exact PQFP suffix (EH vs CFC) footprint before ordering; package drawings differ in body details even when pin functions match.
The MC68332GCEH25 runs from a single 5V rail. Estimated: at 25 MHz the core and I/O draw on the order of hundreds of milliamps (consult the manufacturer datasheet current tables for exact ICC); budget decoupling with at least 0.1 uF ceramic per supply pin pair plus bulk 10-47 uF near the device. Do not attempt to power it from 3.3V rails - the CPU32 and IMB modules are 5V-only, and level shifting is required to interface with modern 3.3V external memory or peripherals.
At 25 MHz with an external memory bus, keep address/data traces short and match the clock to within the datasheet setup/hold margins. Use the SIM chip selects and programmable wait states to relax external memory timing rather than pushing trace-length limits. If substituting a 16 MHz variant (e.g., MC68332ACEH16), all bus timing derived from the system clock changes - re-verify CSOR wait states and TPU prescaler settings against the new clock before power-on.
合規資訊
This is a legacy 5V part predating modern lead-free mandates; RoHS status is listed only as 'details' on distributor pages and is not confirmed in the provided data. Verify compliance certificates with NXP or your distributor before EU-market use.
