C8051F067 Equivalent & Substitute Parts

Part Overview

The C8051F067 is an 8-bit microcontroller from Silicon Labs' C8051F06x series, featuring a 25MHz 8051 core with 32KB FLASH program memory and 4.25KB RAM. This device integrates SMBus/I2C, SPI, and UART connectivity with integrated analog-to-digital conversion (2x16-bit) and comprehensive peripheral support including PWM, watchdog timer, and brown-out detection.

The C8051F067 is classified as Obsolete, making substitute parts necessary for new procurement and ongoing system support. The primary direct substitute is the C8051F067-GQ, which maintains identical electrical and mechanical specifications while offering improved compliance status and availability.

Substiute Parts

C8051F067

Silicon LabsIn Stock: 840C8051F067 Datasheet

Current PartRFQ

C8051F067-GQ

Silicon LabsIn Stock: 1575C8051F067-GQ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the C8051F067 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Core processor architecture (8051)
• Core size (8-Bit)
• Operating frequency (25MHz)
• Program memory capacity and type (32KB FLASH)
• RAM capacity (4.25K x 8)
• Supply voltage range (2.7V ~ 3.6V)
• Data converter specifications (A/D 2x16b)
• I/O count (24 pins)
• Connectivity interfaces (SMBus/I2C, SPI, UART/USART)
• Peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)
• Operating temperature range (-40°C ~ 85°C)

Mechanical Equivalence Requirements:

• Package type (64-TQFP)
• Package dimensions (10x10)
• Mounting type (Surface Mount)
• Moisture sensitivity level (MSL 3)

The C8051F067-GQ meets all electrical and mechanical equivalence criteria, differing only in packaging format (Tray vs. standard) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Procurement: The C8051F067-GQ is the appropriate selection. It maintains complete electrical and mechanical compatibility with the C8051F067 while offering superior compliance status. The C8051F067-GQ is ROHS3 compliant and REACH unaffected, addressing regulatory requirements for modern applications. Although classified as "Not For New Designs," this status reflects manufacturer lifecycle management rather than technical limitations, and the part remains functionally equivalent for all electrical and mechanical parameters.

For Legacy System Support: The C8051F067-GQ provides direct substitution for existing C8051F067 implementations without circuit modification or firmware changes. Pin-for-pin compatibility and identical electrical specifications ensure seamless integration into established designs.

Compliance Considerations: The transition from C8051F067 (RoHS non-compliant) to C8051F067-GQ (ROHS3 compliant) aligns with current environmental and regulatory standards. The REACH unaffected status of the C8051F067-GQ eliminates substance-of-concern documentation requirements.

Frequently Asked Questions (FAQ)

Q: Can C8051F067-GQ replace C8051F067 in existing designs without modification? A: Yes. The C8051F067-GQ is electrically and mechanically identical to the C8051F067. No circuit changes, PCB modifications, or firmware updates are required. Pin assignments, voltage requirements, timing specifications, and peripheral functionality are identical.

Q: What is the difference between C8051F067 and C8051F067-GQ? A: The primary differences are packaging format (standard vs. Tray) and compliance certifications. The C8051F067-GQ is ROHS3 compliant and REACH unaffected, while the C8051F067 is RoHS non-compliant. All electrical and mechanical specifications are identical.

Q: Why is the C8051F067 classified as Obsolete? A: Obsolete status indicates the manufacturer has discontinued production and support. The C8051F067-GQ, classified as "Not For New Designs," represents the available alternative from the same manufacturer for continued supply and support.

Q: Are there any performance differences between these parts? A: No. Both parts operate at 25MHz with identical memory configurations (32KB FLASH, 4.25KB RAM), I/O count (24), and peripheral feature sets. Performance characteristics are equivalent.

Q: What is the significance of MSL 3 (168 Hours) rating? A: MSL 3 indicates the component requires storage in controlled humidity conditions and has a 168-hour floor life after exposure to ambient conditions. Both the C8051F067 and C8051F067-GQ share this rating, requiring identical handling and storage protocols.

Q: Can the C8051F067-GQ be used in high-temperature applications? A: Yes. The operating temperature range is -40°C to 85°C for both parts, supporting industrial and extended-temperature applications within this specification.

Q: Is the 64-TQFP package suitable for automated assembly? A: Yes. The 64-TQFP (10x10) package is a standard surface-mount package compatible with automated pick-and-place and reflow soldering processes used in modern PCB manufacturing.