C8051F022R Equivalent & Substitute Parts

Part Overview

The C8051F022R is an 8-bit microcontroller from Silicon Labs' C8051F02x series, featuring a 25MHz 8051 core with 64KB Flash memory and integrated analog/digital conversion capabilities. This part is classified as Obsolete, making identification of compatible substitutes essential for ongoing system support and new design considerations. The C8051F022R operates within a 2.7V to 3.6V supply range and includes comprehensive on-chip peripherals including PWM, temperature sensing, and watchdog timer functionality.

Key Parameters

Parameter	Value
Core Processor	8051
Core Size	8-Bit
Speed	25MHz
Program Memory Size	64KB (64K x 8) FLASH
RAM Size	4.25K x 8
Number of I/O	64
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V
Data Converters	A/D 8x8b, 8x10b; D/A 2x12b
Connectivity	EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	100-TQFP (14x14)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the C8051F022R is determined by strict equivalence across the following critical parameters:

Core Architecture: 8051 processor family
Memory Configuration: 64KB Flash program memory, 4.25K x 8 RAM
Clock Speed: 25MHz operation
I/O Count: 64 pins
Voltage Range: 2.7V ~ 3.6V supply compatibility
Package Format: 100-TQFP (14x14) surface mount
Peripheral Set: Identical on-chip features including PWM, temperature sensor, watchdog timer, and data conversion capabilities
Connectivity Interfaces: EBI/EMI, SMBus, SPI, UART/USART support

The C8051F022-GQ qualifies as a direct substitute based on complete alignment with all electrical and mechanical parameters listed above.

Parameter Comparison

Parameter	C8051F022R	C8051F022-GQ	Match
Core Processor	8051	8051	✓
Core Size	8-Bit	8-Bit	✓
Speed	25MHz	25MHz	✓
Program Memory Size	64KB (64K x 8) FLASH	64KB (64K x 8) FLASH	✓
RAM Size	4.25K x 8	4.25K x 8	✓
Number of I/O	64	64	✓
Voltage Supply (Vcc/Vdd)	2.7V ~ 3.6V	2.7V ~ 3.6V	✓
Data Converters	A/D 8x8b, 8x10b; D/A 2x12b	A/D 8x8b, 8x10b; D/A 2x12b	✓
Connectivity	EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART	EBI/EMI, SMBus (2-Wire/I2C), SPI, UART/USART	✓
Peripherals	Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT	Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT	✓
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	✓
Package / Case	100-TQFP (14x14)	100-TQFP (14x14)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓

Engineering Selection Recommendations

C8051F022-GQ is the qualified substitute for C8051F022R applications. Both parts share identical electrical specifications, memory architecture, and peripheral functionality. The primary distinction lies in product lifecycle status and compliance certification:

C8051F022R: Classified as Obsolete with RoHS non-compliant status
C8051F022-GQ: Classified as Not For New Designs with RoHS Compliant certification

For legacy system maintenance and repair, C8051F022-GQ provides functional equivalence with improved environmental compliance. The C8051F022-GQ carries verified programmability status and maintains full pin-for-pin, software, and hardware compatibility with the original C8051F022R design.

Frequently Asked Questions (FAQ)

Q: Can C8051F022-GQ replace C8051F022R in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. Pin configuration, memory organization, clock speed, voltage requirements, and peripheral functionality are equivalent. Direct substitution is supported without design modification.

Q: What is the difference between C8051F022R and C8051F022-GQ?

A: The parts differ in product status and compliance certification. C8051F022R is Obsolete and RoHS non-compliant. C8051F022-GQ is Not For New Designs and RoHS Compliant. Electrical and functional specifications are identical.

Q: Are there package differences between these parts?

A: No. Both parts use the 100-TQFP (14x14) surface mount package with identical pin assignments, footprint requirements, and MSL rating of 3 (168 Hours).

Q: Is the C8051F022-GQ suitable for new product development?

A: C8051F022-GQ carries a Not For New Designs status. For new development, evaluation of current-generation alternatives within the C8051F02x series or successor product lines is recommended based on project requirements and lifecycle planning.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by matching core processor type (8051), memory configuration (64KB Flash, 4.25K RAM), clock speed (25MHz), I/O count (64), supply voltage range (2.7V ~ 3.6V), package format (100-TQFP), and peripheral feature set. All parameters must align for direct substitution.

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