MC68331CEH25 - 25MHz CPU32 M68300 Microcontroller PQFP-132 | NXP
Référence : MC68331CEH25 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $42.54 | $42,54 |
| 10 | $38.2 | $382,00 |
| 100 | $32.85 | $3 285,00 |
| 500 | $28.4 | $14 200,00 |
| 1 000 | $24.1 | $24 100,00 |
MC68331CEH25 Présentation
A 32-bit microcontroller is an embedded processing IC whose datapath, registers and ALU are 32 bits wide, enabling single-instruction operations on wide data words and larger linear address spaces than 8- or 16-bit parts. The M68300 family belongs to the ColdFire/M68K lineage (CPU32 -> M68k -> ColdFire -> embedded 32-bit MCU) of CISC RISC-style CISC cores, and within NXP's portfolio it sits below the ColdFire MCF5xxx line. The MC68331CEH25 uses the standard M68300 modular IP blocks, which simplifies migration within the family.
Key features include 25 MHz CPU32 core performance, ROMless operation for flexible external memory interfacing, the GPT timer block (with capture, compare and pulse-width modulation functions), the QSM providing queued SCI and SPI channels, and the SIM block that handles chip-select generation, system protection, clock synthesis and interrupt prioritization. The 132-pin PQFP footprint gives access to the full external bus plus all on-module peripheral pins.
Typical applications include industrial control systems, automotive body and chassis electronics (pre-CAN-era platforms), factory automation, motor control via the GPT PWM outputs, and embedded communication gateways that leverage the QSM serial channels. The 132-pin PQFP package and ROMless architecture make the part attractive where high-performance 32-bit processing is needed alongside custom boot/storage strategies.
When designing with this device, ensure the external bus and chip-select signals are properly terminated, the 25 MHz system clock is stable, and the Vcc rails meet the M68300 family DC specifications referenced in the datasheet. Because the part is in NXP's End-of-Life program, source any qualification stock carefully and review the discontinuance notice for the official last-time-buy window and recommended migration target.
Alternatives de remplacement direct pour MC68331CEH25 — 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 MC68331CEH25 (même facteur de forme et même empreinte) — différant par Package, Program Memory Type, Core, Data Bus Width, Peripherals.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68331CEH20
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68331CEH16
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68332ACEH25
✅ Remplacement direct✓ En stock
$35.54 / unité
Voir la fiche technique →MC68332GCEH25
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MC68332GVEH25
✅ Remplacement direct✓ En stock
$17.8 / unité
Voir la fiche technique →MC68331CEH25 Valeurs maximales et caractéristiques électriques
| Core | CPU32 (32-bit) |
| Operating Frequency | 25 MHz |
| Program Memory Type | ROMless (external memory required) |
| Boîtier | 132-pin PQFP (24.13 mm x 24.13 mm) |
| Type de montage | Surface Mount |
| Integrated Modules | SIM (System Integration Module), GPT (General Purpose Timer), QSM (Queued Serial Module) |
| Internal Bus | IMB (Intermodule Bus) |
| Peripherals | GPT (capture/compare/PWM), QSM (SCI + SPI) |
| Family | M68300 modular microcontroller family |
| Lifecycle | End of Life (per NXP product page) |
Guide de configuration des broches du MC68331CEH25 132-pin pqfp (24.13 mm x 24.13 mm)
Configuration des broches du MC68331CEH25 (boîtier 132-pin pqfp (24.13 mm x 24.13 mm)). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour MC68331CEH25.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MC68331CEH25 convient pour 6 applications: Industrial Control Systems, Automotive Body and Chassis Electronics, Motor Control and PWM Drives, Embedded Communication Gateways, Factory Automation and Process Control, Test and Measurement Instrumentation.
Industrial Control Systems
The MC68331CEH25's 25 MHz CPU32 core and SIM-managed chip-select logic suit legacy PLC-style industrial controllers that need 32-bit arithmetic, deterministic timer interrupts, and broad GPIO access via the 132-pin PQFP. The GPT module's PWM outputs can directly drive solenoid valves, stepper drivers and indicator LEDs, while the QSM's SCI channel links to operator panels and the SPI channel drives ADC/DAC peripherals. The ROMless architecture lets manufacturers store large ladder-logic or motion-control firmware in external Flash, enabling field updates. Compared with newer ARM Cortex-M parts, the MC68331CEH25 is preferred where existing CISC toolchains and 5V-tolerant I/O are still in service, and where dropping in a pin-compatible part avoids PCB redesign during long-life industrial equipment maintenance.
Recommandé
Automotive Body and Chassis Electronics
Pre-CAN-era automotive body controllers (central locking, climate, lighting, instrument clusters) used M68300 parts like the MC68331CEH25 because of their robust 5V-tolerant PQFP-132 I/O and deterministic interrupt response. The GPT's capture inputs read Hall-effect and wheel-speed sensors directly, while QSM SCI channels talk to dashboard and HVAC sub-modules. The 25 MHz CPU32 core handles multi-task scheduling of body control firmware stored in external EPROM/Flash. This part is also widely found in older chassis modules where CAN had not yet been mandated, and the QSM SPI drives dashboard display drivers and EEPROM storage. For new designs, NXP's ColdFire or S32K families supersede the MC68331CEH25, but the existing installed base still relies on the original 132-pin PQFP footprint.
Recommandé
Motor Control and PWM Drives
The MC68331CEH25's GPT module provides multiple independent PWM channels with programmable duty, dead-time and period, which is sufficient for DC, brushed servo and basic brushless DC (BLDC) motor drives at industrial switching frequencies. The 25 MHz CPU32 core executes field-oriented control (FOC) loops at moderate PWM rates, while the SIM's chip-select outputs interface external gate-driver or power-stage peripherals. The QSM SCI channel provides the communication link to a host PLC or HMI, and the 132-pin PQFP offers enough I/O for analog feedback via SPI-driven ADCs. For high-end servo or multi-axis drives, the MC68332 family's TPU module is preferable, but the MC68331CEH25 remains a cost-effective controller for single-axis pumps, fans, conveyor motors and valve actuators.
Recommandé
Embedded Communication Gateways
The MC68331CEH25's QSM module delivers queued SCI (UART) and SPI channels that are well matched to legacy industrial gateways, protocol converters and remote telemetry units. The CPU32 core runs 32-bit protocol stacks (Modbus RTU/ASCII, proprietary SCADA protocols) while the SIM's programmable chip-selects directly map external UART, sensor and memory peripherals. The 132-pin PQFP supports the address/data bus needed for SRAM-backed packet buffers. The part's 25 MHz clock and ROMless architecture are appropriate when firmware size is small to mid-range and is stored in external Flash that can be updated in the field. In modern designs, a ColdFire or Kinetis MCU would replace it, but the MC68331CEH25 still serves as a long-lifetime gateway processor.
Recommandé
Factory Automation and Process Control
PLC-style process controllers, distributed I/O nodes and dedicated machine controllers used the MC68331CEH25 because the 132-pin PQFP exposes the full 32-bit external bus plus the SIM's chip-select logic for glueless memory and I/O expansion. The GPT captures high-speed encoder feedback, the QSM links to operator panels, and the CPU32 handles PID loops for temperature, flow and pressure regulation. The part's deterministic interrupt latency (typical of M68k CISC cores) is well suited to hard-real-time control loops at 1-10 kHz rates. The ROMless design means each application uses application-specific external Flash for recipe storage, calibration tables and firmware revisions, simplifying customization for different machines on the same production line.
Recommandé
Test and Measurement Instrumentation
Bench-top and rack-mounted test equipment (data loggers, signal generators, calibration units, industrial testers) used the MC68331CEH25's 25 MHz CPU32 core for measurement math, the GPT for precise sample-rate timing, and the QSM SCI for remote command interfaces. The 132-pin PQFP package gives access to the external bus needed to drive high-resolution parallel ADC/DAC front ends and to memory-map LCD or VFD displays. The SIM's programmable chip-selects allow flexible memory partitioning between boot Flash, working SRAM and I/O peripherals. The ROMless architecture lets instrument vendors ship application-specific firmware in external Flash for easier field calibration and upgrades, while keeping the core processor silicon generic.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68331CEH25 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC68331CEH20 | MC68331CEH16 | MC68332ACEH25 | MC68332GCEH25 | MC68332GVEH25 |
|---|---|---|---|---|---|---|
| Package | 132-pin PQFP (24.13x24.13 mm) | 132-pin PQFP (same) | 132-pin PQFP (same) | 132-pin PQFP (same) | 132-pin PQFP (same) | 132-pin PQFP (same) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | CPU32 (32-bit) | CPU32 (32-bit) | CPU32 (32-bit) | CPU32 (32-bit) | CPU32 (32-bit) | CPU32 (32-bit) |
| Operating Frequency | 25 MHz | 20 MHz | 16 MHz | 25 MHz | 25 MHz | 25 MHz |
| Integrated Timer Module | GPT (capture/compare/PWM) | GPT | GPT | TPU (Time Processing Unit) | TPU | TPU |
| CAN Module | No (QSM SCI/SPI only) | No | No | TouCAN | TouCAN | TouCAN |
| Serial Module | QSM (SCI + SPI) | QSM (SCI + SPI) | QSM (SCI + SPI) | QSM (SCI + SPI) | QSM (SCI + SPI) | QSM (SCI + SPI) |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) |
| Lifecycle Status | End of Life | End of Life | End of Life | End of Life | End of Life | End of Life |
Principaux différenciateurs
- Higher core clock than 20 MHz / 16 MHz speed grades (vs MC68331CEH20 / MC68331CEH16)
- Simpler GPT/QSM block set vs MC68332 TPU (vs MC68332ACEH25)
- No TouCAN module vs MC68332 family (vs MC68332GCEH25)
Notes de conception
Estimated: the MC68331CEH25 draws core and I/O current from the 5V Vcc rail typical of M68300 PQFP parts. Place 100 nF decoupling capacitors as close as possible to every Vcc/Vss pin pair around the 132-pin PQFP perimeter, and add bulk 10-47 uF tantalum or ceramic capacitors near the package to suppress switching transients from the external bus. Decoupling strategy matters more than for modern MCUs because the M68k external bus can switch 16-32 mA per cycle.
Route the external address and data bus with matched-length traces and a ground reference plane beneath the PQFP to control impedance and crosstalk. Keep CLKOUT and the system clock traces short and guarded, and provide proper bus-termination resistors on long bus runs because the M68300 external bus is TTL-style and not series-terminated on-chip. Place external program memory (EPROM/Flash) and SRAM close to the bus pins to minimize access-time margin loss.
Because the MC68331CEH25 is announced End of Life, do not start a new design without first reviewing the NXP Product Change Notice for the last-time-buy window and recommended migration target (typically a ColdFire or Kinetis part). Avoid hand-editing the ROMless boot flow - configure the SIM's bus-width and chip-select registers correctly for the external memory map at reset, or the CPU32 will lock up with no valid instruction fetch.
Estimated: at 25 MHz with full external-bus activity, the MC68331CEH25 dissipates roughly 0.5-0.8 W depending on bus loading and output-toggle rate. The 132-pin PQFP has a theta_JA of approximately 35-45 C/W on a 4-layer PCB with adequate copper, so junction temperature stays well within the industrial range without a heatsink, but ensure 1 square inch of copper pour is connected to the GND pins to keep thermals under control in enclosed industrial enclosures.
Informations de conformité
Compliance values are [DATA_NEEDED] because the verified web data sources (DigiKey, Mouser, NXP product page) do not explicitly state RoHS/REACH status. NXP product page lists an Environmental Quality link that would resolve this. AEC-Q100 is not qualified - the M68300 family predates widespread automotive AEC-Q100 screening on these parts.
