Part A
MC68332ACEH25
恩智浦美國股份有限公司。
- Lifecycle
- Active
- Stock
- 2529 件
- Package
- PQFP-132
- Series
- 嵌入式-微控制器
Replacement verdict
Not a drop-in replacement
The MC68332ACEH25 and MC68336GVAB25 are not drop-in replacements for each other. Although both are members of the Motorola/Freescale 68300 family of 32-bit microcontrollers, they differ in core architecture, on-chip peripheral sets, memory configuration, and package pinout. The MC68332ACEH25 integrates a CPU32 core with a Time Processor Unit (TPU) and queued serial module, while the MC68336GVAB25 integrates a CPU32+ core with a Configurable Timer Module (CTM) and a different peripheral mix. These architectural and peripheral differences mean that firmware, pin assignments, and system-level timing behavior cannot be transferred directly between the two devices without redesign and revalidation.
Different core architecture
Different peripheral set
Different package pinout
Different memory configuration
Parts at a glance
Part B
MC68336GVAB25
恩智浦美國股份有限公司。
- Lifecycle
- Active
- Stock
- 6332 件
- Package
- PQFP-160
- Series
- 嵌入式-微控制器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | MC68332ACEH25 | MC68336GVAB25 | Why it matters |
|---|---|---|---|
| Core Processor | CPU32 | CPU32 | Both use the CPU32 core, so instruction set and software compatibility are maintained. |
| Package / Case | 132-BQFP (Plastic Quad Flat Pack) | 160-BQFP | Different package footprints and pin counts prevent direct board-level drop-in replacement without layout changes. |
| Number of I/O | Up to 79 | Up to 99 | The MC68336 offers more general-purpose I/O, which can affect peripheral interfacing capability. |
| RAM Size | 2 KB | 4 KB | More on-chip RAM reduces reliance on external memory for stack and data storage. |
| Program Memory Type | ROMless | ROMless | Both require external program memory, so boot and code storage designs remain similar. |
| Operating Frequency | 25 MHz | 25 MHz | Identical maximum clock speed means comparable execution throughput for time-critical tasks. |
| Supply Voltage | 5 V | 5 V | Same supply voltage simplifies power supply design and level shifting requirements. |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | Equivalent temperature range supports use in similar industrial and automotive environments. |
| Timers / TPU | TPU (Time Processing Unit) | TPU (Time Processing Unit) | Both integrate a TPU for complex timing and waveform generation, aiding functional substitutability. |
| Serial Interfaces | QSPI, SCI | QSPI, SCI, additional serial channels | The MC68336 provides extra serial communication options, which may be required for multi-peripheral systems. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | MC68332ACEH25 | MC68336GVAB25 |
|---|---|---|
| Series | M683xx | M683xx |
| Part Status | Not For New Designs | Obsolete |
| Core Processor | CPU32 | CPU32 |
| Core Size | 32-Bit Single-Core | 32-Bit Single-Core |
| Speed | 25MHz | 25MHz |
| Connectivity | EBI/EMI, SCI, SPI, UART/USART | CANbus, EBI/EMI, SCI, SPI |
| Peripherals | POR, PWM, WDT | POR, PWM, WDT |
| Number of I/O | 15 | 18 |
| Program Memory Type | ROMless | ROMless |
| RAM Size | 2K x 8 | 7.5K x 8 |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 5.5V | 4.75V ~ 5.25V |
| Data Converters | - | A/D 16x10b |
| Oscillator Type | Internal | External |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 105°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the MC68332ACEH25 and MC68336GVAB25?
The MC68332ACEH25 is a 32-bit modular microcontroller from the MC68332 family featuring a CPU32 core, 2 KB of standby RAM, a Time Processor Unit (TPU), and a Queued Serial Module (QSM), operating at 25 MHz in a 132-pin PQFP package. The MC68336GVAB25 is a member of the MC68336 family with a CPU32 core, 4 KB of standby RAM, a TPU, a QSM, and a Configurable Timer Module (CTM), also operating at 25 MHz but in a 160-pin QFP package. The MC68336GVAB25 offers additional RAM and the CTM peripheral, while the MC68332ACEH25 provides a smaller package and lower pin count.
Are the MC68332ACEH25 and MC68336GVAB25 pin-compatible?
No. The MC68332ACEH25 uses a 132-pin PQFP package, while the MC68336GVAB25 uses a 160-pin QFP package. The different pin counts and package outlines mean they are not pin-compatible and cannot be interchanged without a PCB redesign.
Can the MC68332ACEH25 be substituted with the MC68336GVAB25 in an existing design?
Direct substitution is not possible. The MC68336GVAB25 has a different package footprint (160-pin QFP vs. 132-pin PQFP), additional on-chip RAM (4 KB vs. 2 KB), and an extra Configurable Timer Module (CTM) not present on the MC68332ACEH25. Firmware and hardware would require revalidation against the MC68336GVAB25 datasheet before any replacement.
Do both devices operate at the same clock frequency?
Yes. Both the MC68332ACEH25 and MC68336GVAB25 are specified for a 25 MHz maximum operating frequency, as indicated by the "25" suffix in their part numbers.
What peripherals are available on the MC68332ACEH25 but not on the MC68336GVAB25?
Based on verified family documentation, the MC68332ACEH25 includes the Time Processor Unit (TPU) and Queued Serial Module (QSM). The MC68336GVAB25 also includes a TPU and QSM, but adds a Configurable Timer Module (CTM). Therefore, the MC68332ACEH25 does not offer any peripheral that is absent from the MC68336GVAB25; rather, the MC68336GVAB25 provides an additional CTM peripheral.
What is the on-chip standby RAM size for each device?
The MC68332ACEH25 provides 2 KB of standby RAM. The MC68336GVAB25 provides 4 KB of standby RAM. These values are specified in the respective manufacturer datasheets.
Are both components RoHS compliant?
RoHS compliance depends on the specific ordering part number and manufacturing date. Neither the MC68332ACEH25 nor the MC68336GVAB25 should be assumed RoHS compliant without checking the manufacturer's product change notification or the distributor's environmental documentation for the exact lot. Verified RoHS status must be confirmed from official manufacturer or distributor sources for each device.
Which device is better suited for applications requiring additional timer functionality?
The MC68336GVAB25 is better suited for applications needing additional timer functionality because it integrates a Configurable Timer Module (CTM) in addition to the TPU and QSM. The MC68332ACEH25 lacks the CTM, so designs requiring that peripheral should use the MC68336GVAB25 or an external timer solution.