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ATSAM4CMP32CA-AU Equivalent & Substitute Parts
Part Overview
The ATSAM4CMP32CA-AU is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller from Microchip Technology's SAM4CM series, featuring 2MB of FLASH memory, 256KB of RAM, and 52 I/O pins in a 100-LQFP package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Series | SAM4CM |
| Core Processor | ARM Cortex-M4/M4F |
| Core Size | 32-Bit Dual-Core |
| Speed | 120MHz |
| Program Memory Size | 2MB (2M x 8) |
| RAM Size | 256K x 8 |
| Voltage Supply (Vcc/Vdd) | 1.62V ~ 3.6V |
| Number of I/O | 52 |
| Package / Case | 100-LQFP (14x14) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
The ATSAM4CMP32CB-AU qualifies as a direct substitute based on identical electrical and mechanical specifications across all critical parameters. Substitution is valid when the following conditions are met:
- Identical core processor architecture (ARM Cortex-M4/M4F)
- Matching core size (32-Bit Dual-Core)
- Identical operating frequency (120MHz)
- Identical program memory capacity (2MB FLASH)
- Identical RAM capacity (256KB)
- Identical I/O pin count (52)
- Identical supply voltage range (1.62V ~ 3.6V)
- Identical package type and pinout (100-LQFP 14x14)
- Identical operating temperature range (-40°C ~ 85°C)
- Matching connectivity interfaces (EBI/EMI, I2C, IrDA, SPI, UART/USART)
- Matching peripheral set (Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT)
- Identical data converter specifications (A/D 6x10b)
Parameter Comparison
| Parameter | ATSAM4CMP32CA-AU (Main) | ATSAM4CMP32CB-AU (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Series | SAM4CM | SAM4CM |
| Core Processor | ARM Cortex-M4/M4F | ARM Cortex-M4/M4F |
| Core Size | 32-Bit Dual-Core | 32-Bit Dual-Core |
| Speed | 120MHz | 120MHz |
| Program Memory Size | 2MB (2M x 8) | 2MB (2M x 8) |
| RAM Size | 256K x 8 | 256K x 8 |
| Voltage Supply (Vcc/Vdd) | 1.62V ~ 3.6V | 1.62V ~ 3.6V |
| Number of I/O | 52 | 52 |
| Connectivity | EBI/EMI, I2C, IrDA, SPI, UART/USART | EBI/EMI, I2C, IrDA, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT |
| Data Converters | A/D 6x10b | A/D 6x10b |
| Package / Case | 100-LQFP (14x14) | 100-LQFP (14x14) |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
| Product Status | Obsolete | Active |
Engineering Selection Recommendations
The ATSAM4CMP32CB-AU is a direct functional equivalent to the ATSAM4CMP32CA-AU. Both devices are ROHS3 compliant and share identical electrical specifications, memory configuration, I/O architecture, and thermal operating range. The primary distinction is product lifecycle status: the main part is obsolete while the substitute is active.
Selection of the ATSAM4CMP32CB-AU is appropriate for new designs and production continuity where the ATSAM4CMP32CA-AU is no longer available. Both parts maintain identical pinout compatibility and peripheral functionality, ensuring seamless integration into existing PCB layouts and firmware implementations.
Frequently Asked Questions (FAQ)
Q: Are ATSAM4CMP32CA-AU and ATSAM4CMP32CB-AU pin-compatible?
A: Yes. Both devices use the 100-LQFP (14x14) package with identical pinout, I/O count (52), and peripheral signal assignments.
Q: Can ATSAM4CMP32CB-AU replace ATSAM4CMP32CA-AU in existing designs?
A: Yes. The substitute part maintains identical electrical specifications, memory capacity, operating frequency, supply voltage range, and thermal characteristics. No design modifications are required.
Q: What is the difference between these two part numbers?
A: The primary difference is product status and packaging designation. ATSAM4CMP32CA-AU is obsolete; ATSAM4CMP32CB-AU is active. The substitute is supplied in Tray packaging, while the main part packaging is unspecified in available data.
Q: Are there any compliance or certification differences?
A: No. Both parts are ROHS3 compliant with identical Moisture Sensitivity Level (MSL 3, 168 Hours), REACH status, and ECCN classification.
Q: What is the inventory status of these parts?
A: ATSAM4CMP32CA-AU has 667 pieces in stock (obsolete status). ATSAM4CMP32CB-AU has 1174 pieces in stock (active status).
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