C8051F006-GQ Equivalent & Substitute Parts

Part Overview

The C8051F006-GQ is an 8-bit microcontroller from Silicon Labs' C8051F00x series, featuring a 25MHz 8051 core with 32KB Flash memory and integrated peripherals including I2C/SMBus, SPI, and UART connectivity. This device is classified as Not For New Designs, indicating it has reached end-of-life status. Organizations currently using this component in production systems require equivalent alternatives to ensure supply chain continuity and support for ongoing maintenance and new production runs.

Substiute Parts

C8051F006-GQ

Silicon LabsIn Stock: 1404C8051F006-GQ Datasheet

Current PartRFQ

C8051F921-G-GM

Silicon LabsIn Stock: 2287C8051F921-G-GM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The C8051F921-G-GM qualifies as a functional equivalent based on the following critical parameters:

Matching Parameters:

• 8051 core processor architecture
• 8-bit core size
• 25MHz operating speed
• 32KB Flash program memory
• 16 I/O pins
• SMBus (2-Wire/I2C), SPI, UART/USART connectivity
• Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT peripherals
• Internal oscillator
• -40°C ~ 85°C operating temperature range
• ROHS3 compliance
• REACH unaffected status

Differing Parameters:

• Package format: 48-TQFP (7x7) vs. 24-QFN (4x4)
• RAM size: 2.25K x 8 vs. 4.25K x 8
• Voltage supply range: 2.7V ~ 3.6V vs. 0.9V ~ 3.6V
• Data converters: A/D 8x12b, D/A 2x12b vs. A/D 15x10b
• Product status: Not For New Designs vs. Active
• MSL rating: 3 vs. 1

Parameter Comparison

Engineering Selection Recommendations

The C8051F921-G-GM is an active product from Silicon Labs with current manufacturing support, making it suitable for applications requiring long-term component availability. The substitute maintains core processor compatibility, identical clock speed, and equivalent program memory capacity. The increased RAM capacity (4.25K vs. 2.25K) provides additional headroom for applications with dynamic memory requirements.

Package migration from 48-TQFP to 24-QFN represents a significant physical footprint reduction and requires PCB layout redesign. The 24-QFN package offers improved thermal characteristics through its exposed pad design. The lower MSL rating (1 vs. 3) indicates superior moisture resistance, reducing reflow process constraints.

The extended voltage supply range (0.9V ~ 3.6V) of the C8051F921-G-GM provides greater flexibility for low-power applications compared to the C8051F006-GQ minimum of 2.7V. Differences in analog converter specifications (A/D channel count and resolution) must be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the C8051F921-G-GM directly replace the C8051F006-GQ without firmware modification?

A: Core processor architecture, clock speed, and program memory are identical, supporting binary compatibility for most firmware. However, differences in RAM size, analog converter specifications, and I/O pin mapping require validation against application-specific requirements.

Q: What are the implications of the package change from 48-TQFP to 24-QFN?

A: The 24-QFN package is significantly smaller (4x4mm vs. 7x7mm) and requires complete PCB redesign. Pin assignments differ between packages, necessitating schematic and layout modifications. The QFN format includes an exposed thermal pad for improved heat dissipation.

Q: Are there compatibility concerns with the reduced RAM size difference?

A: The C8051F921-G-GM provides 4.25K RAM compared to 2.25K in the C8051F006-GQ. Applications designed for the original device will operate within the substitute's memory envelope. Applications requiring more than 2.25K RAM benefit from the additional capacity.

Q: How do the analog converter differences affect substitution?

A: The C8051F006-GQ includes 8 A/D channels at 12-bit resolution plus 2 D/A channels. The C8051F921-G-GM provides 15 A/D channels at 10-bit resolution without D/A converters. Applications dependent on D/A functionality or requiring 12-bit A/D precision require alternative solutions.

Q: What is the significance of the MSL rating change from 3 to 1?

A: MSL 3 allows 168 hours of floor life before reflow; MSL 1 has unlimited floor life. The C8051F921-G-GM offers superior moisture tolerance, reducing manufacturing process constraints and enabling extended storage periods without baking requirements.

Q: Is the extended voltage range of the C8051F921-G-GM a functional advantage?

A: The 0.9V minimum supply voltage enables ultra-low-power applications not feasible with the C8051F006-GQ's 2.7V minimum. Applications operating within the 2.7V ~ 3.6V range experience no functional difference.