SIM3C136-B-GMR Equivalent & Substitute Parts

Part Overview

The SIM3C136-B-GMR is an ARM Cortex-M3 32-bit microcontroller manufactured by Silicon Labs, featuring 32KB FLASH memory and operating at 80MHz. This device is classified as Not For New Designs, making identification of functionally equivalent alternatives essential for ongoing system support and production continuity. The part is available in 64-QFN packaging with 50 I/O pins and operates across a 1.8V to 3.6V supply range.

Substiute Parts

SIM3C136-B-GMR

Silicon LabsIn Stock: 1240SIM3C136-B-GMR Datasheet

Current PartRFQ

NUC230SC2AE

Nuvoton Technology CorporationIn Stock: 1114NUC230SC2AE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SIM3C136-B-GMR is determined by the following critical parameters:

• Memory Configuration: Program memory of 32KB FLASH and 8KB RAM
• I/O Count: Minimum 49 I/O pins to support equivalent pin-out density
• Package Compatibility: 64-pin QFP-class packages (QFN or LQFP variants)
• Supply Voltage: Operating range that encompasses or exceeds 1.8V ~ 3.6V
• Core Architecture: 32-bit single-core ARM-based processors
• Peripheral Set: Presence of core interfaces including I2C, SPI, UART/USART, PWM, and DMA

The NUC230SC2AE meets these substitution criteria through equivalent memory density, I/O pin count, package class, and peripheral feature set, despite differences in core processor generation and operating frequency.

Parameter Comparison

Engineering Selection Recommendations

The NUC230SC2AE serves as a functional substitute for the SIM3C136-B-GMR based on equivalent memory architecture, I/O pin density, and peripheral feature overlap. Both devices maintain ROHS3 compliance and identical MSL ratings, supporting equivalent handling and storage requirements.

The SIM3C136-B-GMR's Not For New Designs status necessitates transition planning. The NUC230SC2AE's Active product status ensures long-term availability and manufacturing support. The substitute part accommodates the primary memory and I/O requirements of the original design while offering extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 85°C).

Design migration requires evaluation of the following differences: reduced A/D converter channel count (7 versus 28), absence of D/A converters in the substitute, and core processor architecture change from Cortex-M3 to Cortex-M0. The NUC230SC2AE provides additional EEPROM capacity (4KB) not present in the original part. Package transition from 64-QFN to 64-LQFP necessitates PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the NUC230SC2AE directly replace the SIM3C136-B-GMR without firmware modification?

A: Direct pin-for-pin replacement is not possible due to package type differences (QFN versus LQFP). PCB layout redesign is required. Firmware compatibility depends on application-specific use of core processor features and peripheral configurations. The Cortex-M0 architecture differs from Cortex-M3, requiring code review for instruction set compatibility.

Q: What are the critical differences in analog capabilities?

A: The SIM3C136-B-GMR provides 28 A/D channels and 2 D/A channels. The NUC230SC2AE provides 7 A/D channels and no D/A capability. Applications requiring the full analog channel count or D/A functionality cannot use this substitute without external analog components.

Q: Are both parts compatible with the same supply voltage?

A: The SIM3C136-B-GMR operates at 1.8V ~ 3.6V. The NUC230SC2AE operates at 2.5V ~ 5.5V. Systems designed for the lower voltage range (1.8V ~ 2.5V) require supply voltage adjustment when using the substitute.

Q: What packaging considerations apply to this substitution?

A: The original part uses 64-QFN (9x9mm) packaging. The substitute uses 64-LQFP (7x7mm) packaging. The LQFP package has different thermal characteristics and PCB footprint requirements. Thermal management analysis is necessary if the original design relied on QFN thermal performance.

Q: How do I/O pin counts affect compatibility?

A: The SIM3C136-B-GMR provides 50 I/O pins. The NUC230SC2AE provides 49 I/O pins. Applications utilizing all 50 pins require design modification or alternative substitutes with higher I/O density.