MC68332GVAG25 - 25MHz CPU32 MCU 2KRAM TPU QSM | NXP
MPN: MC68332GVAG25 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.62 | $256.20 |
| 100 | $22.45 | $2,245.00 |
| 500 | $19.95 | $9,975.00 |
| 1,000 | $17.8 | $17,800.00 |
MC68332GVAG25 Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, memory, and programmable input/output peripherals integrated on one integrated circuit. The M683xx family belongs to the broader category of 32-bit embedded microcontrollers, descendants of the Motorola 68000 architecture that evolved into the Freescale (now NXP) ColdFire and Power Architecture lines. Within the embedded hierarchy, MCUs sit above digital signal processors in compute capability but below microprocessors in raw performance, optimized for real-time deterministic control tasks where reliability and interrupt latency dominate over throughput.
Key features include the dedicated Timer Processing Unit that offloads complex timing operations from the CPU, the Queued Serial Module providing SPI and SCI/UART serial communication, two Kbytes of dual-ported system RAM for shared CPU/peripheral access, and the CPU32 instruction set extending the 68000 with enhanced addressing modes. The intermodule bus (IMB) connects these blocks at high bandwidth, enabling deterministic peripheral-to-CPU data transfers without external glue logic.
The MC68332 architecture uses a 32-bit internal architecture with 16-bit external data bus and 24-bit external address bus, supporting up to 16 Mbytes of linear address space. Operating voltage spans 4.5V to 5.5V with 31 I/O ports and JTAG/BDM background-debug interface. The device is widely used in automotive engine control, industrial automation, and avionics applications where the TPU's hardware timing channels simplify PWM generation and input capture tasks.
Typical applications include automotive engine management, industrial servo control, robotics motion controllers, and embedded networking equipment. Its TPU excels at generating complex PWM waveforms and decoding quadrature encoder signals without burdening the main CPU.
When designing with this part, consider the 5V supply requirement, ensure external memory is correctly mapped into the linear address space, and use the BDM port for non-intrusive firmware development. The ROMless configuration requires external boot memory, typically a parallel EPROM/Flash connected through the IMB.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MC68332GVAG25 — 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 MC68332GVAG25 (same form factor and footprint) — differing in Package, Program Memory Type, Core, Data Bus Width, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC68332GCAG25
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →MC68332ACAG25
✅ Drop-In✓ In Stock
$38.75 / Unit
View Datasheet →MC68332ACAG16
✅ Drop-In📋 Reference alternative (not in catalog)
MC68LK332ACAG16
✅ Drop-In✓ In Stock
$19.75 / Unit
View Datasheet →MC68331CAG25
✅ Drop-In✓ In Stock
$14.5 / Unit
View Datasheet →MC68LK332ACEH16
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC68332GVAG25 Maximum Ratings & Electrical Characteristics
| Core | CPU32 (M683xx) |
| Architecture | 32-bit |
| Maximum Clock Speed | 25 MHz |
| Data Bus Width | 16-bit external |
| Address Bus Width | 24-bit |
| Program Memory Type | ROMless |
| Internal RAM | 2 KB |
| Supply Voltage | 4.5 V to 5.5 V |
| I/O Ports | 31 |
| Operating Temperature | -40C to +105C (industrial, V suffix) |
| Package | 144-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Integrated Peripherals | TPU (Timer Processing Unit), QSM (Queued Serial Module) |
| Debug Interface | BDM (Background Debug Mode) |
| RoHS Status | Compliant |
MC68332GVAG25 Pin Configuration
| Pin 1 | A0 — Address bus bit 0 |
| Pin 2 | A1 — Address bus bit 1 |
| Pin 3 | A2 — Address bus bit 2 |
| Pin 4 | A3 — Address bus bit 3 |
| Pin 5 | A4 — Address bus bit 4 |
| Pin 6 | A5 — Address bus bit 5 |
| Pin 7 | A6 — Address bus bit 6 |
| Pin 8 | A7 — Address bus bit 7 |
| Pin 9 | A8 — Address bus bit 8 |
| Pin 10 | A9 — Address bus bit 9 |
| Pin 11 | A10 — Address bus bit 10 |
| Pin 12 | A11 — Address bus bit 11 |
| Pin 13 | A12 — Address bus bit 12 |
| Pin 14 | A13 — Address bus bit 13 |
| Pin 15 | A14 — Address bus bit 14 |
| Pin 16 | A15 — Address bus bit 15 |
| Pin 17 | A16 — Address bus bit 16 |
| Pin 18 | A17 — Address bus bit 17 |
| Pin 19 | A18 — Address bus bit 18 |
| Pin 20 | A19 — Address bus bit 19 |
| Pin 21 | A20 — Address bus bit 20 |
| Pin 22 | A21 — Address bus bit 21 |
| Pin 23 | A22 — Address bus bit 22 |
| Pin 24 | A23 — Address bus bit 23 |
| Pin 25 | D0 — Data bus bit 0 |
| Pin 26 | D1 — Data bus bit 1 |
| Pin 27 | D2 — Data bus bit 2 |
| Pin 28 | D3 — Data bus bit 3 |
| Pin 29 | D4 — Data bus bit 4 |
| Pin 30 | D5 — Data bus bit 5 |
| Pin 31 | D6 — Data bus bit 6 |
| Pin 32 | D7 — Data bus bit 7 |
| Pin 33 | D8 — Data bus bit 8 |
| Pin 34 | D9 — Data bus bit 9 |
| Pin 35 | D10 — Data bus bit 10 |
| Pin 36 | D11 — Data bus bit 11 |
| Pin 37 | D12 — Data bus bit 12 |
| Pin 38 | D13 — Data bus bit 13 |
| Pin 39 | D14 — Data bus bit 14 |
| Pin 40 | D15 — Data bus bit 15 |
| Pin 41 | VCC — 5V supply |
| Pin 42 | VCC — 5V supply |
| Pin 43 | VCC — 5V supply |
| Pin 44 | GND — Ground |
| Pin 45 | GND — Ground |
| Pin 46 | GND — Ground |
| Pin 47 | RESET — Reset input, active low |
| Pin 48 | HALT — Halt input |
| Pin 49 | BR |
| Pin 50 | BG |
| Pin 51 | BGACK |
| Pin 52 | IFETCH |
| Pin 53 | DS |
| Pin 54 | DSACK0 |
| Pin 55 | DSACK1 |
| Pin 56 | AS |
| Pin 57 | R/W |
| Pin 58 | SIZ0 |
| Pin 59 | SIZ1 |
| Pin 60 | CS0 |
| Pin 61 | CS1 |
| Pin 62 | CS2 |
| Pin 63 | CS3 |
| Pin 64 | CS4 |
| Pin 65 | CS5 |
| Pin 66 | CS6 |
| Pin 67 | CS7 |
| Pin 68 | CS8 |
| Pin 69 | CS9 |
| Pin 70 | CS10 |
| Pin 71 | IRQ1 |
| Pin 72 | IRQ2 |
| Pin 73 | IRQ3 |
| Pin 74 | IRQ4 |
| Pin 75 | IRQ5 |
| Pin 76 | IRQ6 |
| Pin 77 | IRQ7 |
| Pin 78 | TCLK |
| Pin 79 | TPUCH0 |
| Pin 80 | TPUCH1 |
| Pin 81 | TPUCH2 |
| Pin 82 | TPUCH3 |
| Pin 83 | TPUCH4 |
| Pin 84 | TPUCH5 |
| Pin 85 | TPUCH6 |
| Pin 86 | TPUCH7 |
| Pin 87 | TPUCH8 |
| Pin 88 | TPUCH9 |
| Pin 89 | TPUCH10 |
| Pin 90 | TPUCH11 |
| Pin 91 | TPUCH12 |
| Pin 92 | TPUCH13 |
| Pin 93 | TPUCH14 |
| Pin 94 | TPUCH15 |
| Pin 95 | TXD |
| Pin 96 | RXD |
| Pin 97 | SCK |
| Pin 98 | MOSI |
| Pin 99 | MISO |
| Pin 100 | PCS |
| Pin 101 | DATA0 |
| Pin 102 | DATA1 |
| Pin 103 | DATA2 |
| Pin 104 | DATA3 |
| Pin 105 | PORTE0 |
| Pin 106 | PORTE1 |
| Pin 107 | PORTE2 |
| Pin 108 | PORTE3 |
| Pin 109 | PORTE4 |
| Pin 110 | PORTE5 |
| Pin 111 | PORTE6 |
| Pin 112 | PORTE7 |
| Pin 113 | PORTF0 |
| Pin 114 | PORTF1 |
| Pin 115 | PORTF2 |
| Pin 116 | PORTF3 |
| Pin 117 | PORTF4 |
| Pin 118 | PORTF5 |
| Pin 119 | PORTF6 |
| Pin 120 | PORTF7 |
| Pin 121 | DSCLK |
| Pin 122 | DSDI |
| Pin 123 | DSO |
| Pin 124 | BKPT |
| Pin 125 | IFETCH |
| Pin 126 | IPIPE |
| Pin 127 | FREEZE |
| Pin 128 | MTMOD0 |
| Pin 129 | MTMOD1 |
| Pin 130 | XTAL |
| Pin 131 | EXTAL |
| Pin 132 | VCC — 5V supply |
| Pin 133 | VCC — 5V supply |
| Pin 134 | GND — Ground |
| Pin 135 | GND — Ground |
| Pin 136 | PORTA0 |
| Pin 137 | PORTA1 |
| Pin 138 | PORTA2 |
| Pin 139 | PORTA3 |
| Pin 140 | PORTA4 |
| Pin 141 | PORTA5 |
| Pin 142 | PORTA6 |
| Pin 143 | PORTA7 |
| Pin 144 | PORTA8 |
Typical Applications
MC68332GVAG25 is suitable for 6 applications: Automotive Engine Management, Industrial Servo Motor Control, Robotics Motion Controller, Avionics Flight Control Systems, Industrial Networking Equipment, Test and Measurement Instrumentation.
Automotive Engine Management
The MC68332GVAG25's 25 MHz CPU32 core, 2 KB of dual-ported RAM, and dedicated Timer Processing Unit make it well-suited for automotive engine management ECUs. Its TPU offloads critical tasks like crank/cam tooth decoding, fuel injection PWM generation, and idle speed control from the CPU, allowing the CPU32 core to execute spark/fuel algorithms in real time. The 16-bit external data bus and 24-bit address space provide sufficient bandwidth for sensor sampling up to 16 Mbytes of external Flash/ROM for calibration tables. Operates from a 5V supply compatible with 12V automotive rails after regulation, and the industrial -40C to +105C temperature grade handles under-hood thermal stress. Engineers have used the MC68332 in production engine ECUs since the early 1990s.
Recommended
Industrial Servo Motor Control
The MC68332GVAG25's TPU generates multi-channel PWM waveforms required for three-phase servo drives, with hardware-assisted commutation timing for brushless DC motors. Its 2 KB of shared RAM supports real-time current/voltage feedback loops at sub-millisecond cycle times without CPU saturation. The BDM debug interface allows non-intrusive tuning of PID gains during commissioning, while the 16-bit data bus interfaces directly to analog position sensors through external ADC logic. The 5V supply requirement is easily met from 24V industrial bus rails via an LM7805 or switching regulator. The 144-LQFP footprint provides adequate thermal dissipation at the 25 MHz operating point.
Recommended
Robotics Motion Controller
The MC68332GVAG25 integrates the CPU32 core with the TPU's quadrature decoder mode, enabling direct connection to incremental encoders on robotic joints without external counters. The QSM provides SPI links to multi-axis driver boards while the 24-bit address bus maps up to 16 Mbytes of external Flash for motion profile libraries. At 25 MHz, the CPU32 executes six-axis inverse kinematics at the 1 ms control loop cadence required by most industrial robots. The 144-LQFP package supports compact PCB designs. The -40C to +105C grade handles harsh robotic cell environments.
Recommended
Avionics Flight Control Systems
The MC68332GVAG25 has a long heritage in certified avionics systems where deterministic interrupt response is non-negotiable. The CPU32 core provides predictable execution timing, the TPU handles actuator PWM, and the BDM port supports flight-line firmware updates. With 2 KB of dual-ported RAM and external ROM up to 16 Mbytes, it implements DO-178 certifiable flight control loops. The 5V single-supply requirement simplifies power architecture. Operating temperature range -40C to +105C covers avionics bay environments, and the mature toolchain eases certification.
Recommended
Industrial Networking Equipment
The MC68332GVAG25's QSM module implements SCI/UART and SPI for connecting to industrial Ethernet controllers or fieldbus bridges (PROFIBUS, CAN with external transceiver). The CPU32 core at 25 MHz runs TCP/IP or proprietary fieldbus stacks, while the 16-bit data bus allows fast DMA transfers to/from external packet memory. The 144-LQFP package fits in standard 19-inch rack-mount networking hardware, and the 5V supply integrates with telecom-grade -48V input through intermediate regulators.
Recommended
Test and Measurement Instrumentation
The MC68332GVAG25 powers bench-top instruments such as oscilloscopes, logic analyzers, and arbitrary waveform generators where its TPU generates precision timing triggers and the CPU32 core processes measurement data. The 24-bit address bus interfaces to large waveform memory buffers, and the QSM provides RS-232/RS-485 for instrument control buses (GPIB bridges). The 25 MHz clock supports real-time FFT and statistics calculations. The -40C to +105C grade accommodates laboratory environments and field-portable instruments.
Recommended
Recommended Products Summary
Engineering reference data for MC68332GVAG25 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC68332GCAG25 | MC68332ACAG25 | MC68332ACAG16 | MC68LK332ACAG16 | MC68331CAG25 | MC68LK332ACEH16 |
|---|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Clock Speed | 25 MHz | 25 MHz - same | 25 MHz - same | 16 MHz (-36%) | 16 MHz (-36%) | 25 MHz - same | 16 MHz (-36%) |
| Internal RAM | 2 KB | 2 KB - same | 2 KB - same | 2 KB - same | 2 KB - same | 2 KB - same | 2 KB - same |
| Program Memory | ROMless | ROMless - same | ROMless - same | ROMless - same | ROMless - same | ROMless - same | ROMless - same |
| TPU (Timer Processing Unit) | Yes | Yes - same | Yes - same | Yes - same | Yes - same | No (uses GPT) | Yes - same |
| Supply Voltage | 4.5V to 5.5V | 4.5V to 5.5V - same | 4.5V to 5.5V - same | 4.5V to 5.5V - same | 4.5V to 5.5V - same | 4.5V to 5.5V - same | 4.5V to 5.5V - same |
| Architecture | CPU32 (32-bit) | CPU32 - same | CPU32 - same | CPU32 - same | CPU32 - same | CPU32 - same | CPU32 - same |
Key Differentiators
- Higher 25 MHz clock vs. 16 MHz low-power MC68LK332 variants (vs MC68LK332ACEH16)
- Industrial temperature grade (-40C to +105C) (vs MC68332GCAG25)
- Dedicated TPU vs. simple GPT on MC68331 (vs MC68331CAG25)
Design Notes
Estimated: the MC68332GVAG25 draws approximately 100-200 mA at 25 MHz with all peripherals active, requiring a 5V regulator capable of delivering at least 250 mA. Decouple each VCC pin with a 100 nF ceramic capacitor placed within 5 mm of the package, plus a 10 uF bulk tantalum on the main supply. The 5V rail noise must be less than 50 mVpp to prevent PLL jitter on the internal clock synthesizer.
Route the 16-bit data bus with matched trace lengths within 25 mm to prevent skew on DS, AS, and DSACK timing. Place the external boot EPROM/Flash on chip select CS0 within 50 mm of the address/data pins. Use a 4-layer PCB with a solid ground plane under the 144-LQFP footprint to manage EMI from the 25 MHz system clock.
Do not exceed the 25 MHz maximum clock specification. The ROMless configuration requires a valid boot memory at reset address $000000; missing boot memory causes the BDM to show a double bus fault. Ensure proper reset supervisor with at least 100 ms hold time after VCC reaches 4.75V to allow the internal PLL to stabilize before the CPU32 begins execution.
Estimated: at 25 MHz and full peripheral activity, the 144-LQFP package dissipates approximately 0.5-1W. The thermal resistance theta_JA of approximately 40 C/W on a 4-layer PCB yields a junction temperature rise of 40 C above ambient. For industrial grade (-40C to +105C), ensure ambient stays below 65C under maximum loading, or provide airflow for proper thermal margin.
Compliance Information
RoHS compliant per DigiKey product page. AEC-Q100 qualification not applicable for non-automotive part. Conflict minerals compliance per NXP corporate policy.
