C8051F022 Equivalent & Substitute Parts

Part Overview

The C8051F022 is an 8-bit microcontroller from Silicon Labs' C8051F02x series, featuring a 25MHz 8051 core with 64KB Flash program memory and 4.25KB RAM. This device integrates multiple communication interfaces (SPI, UART/USART, SMBus/I2C, EBI/EMI) and analog capabilities including 8-channel 8/10-bit ADCs and 2-channel 12-bit DACs, housed in a 100-TQFP surface mount package.

The C8051F022 is classified as Obsolete, making it necessary to identify functionally equivalent alternatives for new designs and ongoing production support. The primary substitute is the C8051F022-GQ, which maintains identical electrical and mechanical specifications while offering improved availability and updated compliance status.

Key Parameters

Parameter	Value
Core Processor	8051
Core Size	8-Bit
Speed	25MHz
Program Memory Size	64KB (64K x 8)
Program Memory Type	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)
Mounting Type	Surface Mount
Package / Case	100-TQFP (14x14)
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the C8051F022 is determined by strict equivalence across the following critical parameters:

Core architecture and processing capability (8051 core, 8-bit, 25MHz speed), program memory configuration (64KB Flash), RAM capacity (4.25K x 8), I/O count (64 pins), supply voltage range (2.7V ~ 3.6V), analog subsystem (8-channel ADC with 8/10-bit resolution, 2-channel 12-bit DAC), communication interfaces (SPI, UART/USART, SMBus/I2C, EBI/EMI), integrated peripherals (Brown-out Detect/Reset, POR, PWM, Temperature Sensor, Watchdog Timer), operating temperature range (-40°C ~ 85°C), and physical package specification (100-TQFP, 14x14mm).

The C8051F022-GQ maintains complete electrical and mechanical compatibility with the original part while differing in packaging format (Tray vs. standard packaging) and product lifecycle status.

Parameter Comparison

Parameter	C8051F022	C8051F022-GQ
Manufacturer	Silicon Labs	Silicon Labs
Series	C8051F02x	C8051F02x
Core Processor	8051	8051
Core Size	8-Bit	8-Bit
Speed	25MHz	25MHz
Program Memory Size	64KB (64K x 8)	64KB (64K x 8)
Program Memory Type	FLASH	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)
Mounting Type	Surface Mount	Surface Mount
Package / Case	100-TQFP (14x14)	100-TQFP (14x14)
Supplier Device Package	100-TQFP (14x14)	100-TQFP (14x14)
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
ECCN	EAR99	EAR99
HTSUS	8542.31.0001	8542.31.0001
Product Status	Obsolete	Not For New Designs
RoHS Status	RoHS non-compliant	RoHS Compliant

Engineering Selection Recommendations

The C8051F022-GQ is the direct functional equivalent of the C8051F022. Selection between these parts should be based on product lifecycle requirements and regulatory compliance:

For legacy system maintenance and repair of existing C8051F022 installations, the C8051F022-GQ provides identical electrical and functional performance with superior availability (100,100 units in stock versus 1,416 units).

For new designs, the C8051F022-GQ is preferred due to RoHS compliance status. The original C8051F022 is classified as Obsolete and RoHS non-compliant, making it unsuitable for applications subject to environmental regulations or long-term supply chain requirements.

Both parts share identical core specifications, memory configuration, I/O architecture, analog subsystems, communication interfaces, and thermal operating range. The packaging format difference (Tray for C8051F022-GQ) does not affect electrical or mechanical compatibility in standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Are C8051F022 and C8051F022-GQ pin-for-pin compatible?

A: Yes. Both devices use the 100-TQFP (14x14mm) package with identical pinout, electrical characteristics, and functional specifications. Direct substitution is possible without PCB redesign.

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

A: The primary differences are product status and compliance certification. C8051F022 is Obsolete and RoHS non-compliant. C8051F022-GQ is classified as Not For New Designs and is RoHS Compliant. All electrical, memory, I/O, and peripheral specifications are identical.

Q: Can I use C8051F022-GQ in existing designs originally specified for C8051F022?

A: Yes. The C8051F022-GQ is a direct functional substitute with no design changes required. Firmware, PCB layout, and external component configurations remain unchanged.

Q: What does "Not For New Designs" mean for C8051F022-GQ?

A: This status indicates the part is available for production and support of existing designs but is not recommended for new product development. Silicon Labs may discontinue this part in the future. For new designs, consult Silicon Labs for current-generation alternatives within the C8051 family.

Q: Are there any supply voltage or thermal operating differences?

A: No. Both parts operate at 2.7V to 3.6V supply voltage and function across the -40°C to 85°C temperature range. Electrical specifications are identical.

Q: Does the Tray packaging of C8051F022-GQ affect assembly compatibility?

A: No. Tray packaging is a distribution format that does not affect the component itself. Standard pick-and-place assembly equipment handles both packaging formats identically.

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