C8051F388-GQ Equivalent & Substitute Parts

Part Overview

The C8051F388-GQ is an 8-bit microcontroller from Silicon Labs' C8051F38x series, featuring a 48 MIPS 8051 core with 64KB Flash program memory and 4.25KB RAM. This device is designed for embedded applications requiring integrated analog and digital peripherals, including a 32-channel 10-bit analog-to-digital converter, PWM outputs, temperature sensor, and watchdog timer.

The C8051F388-GQ is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, maintenance, and new deployments.

Key Parameters

Parameter	Value
Core Processor	8051
Core Size	8-Bit
Speed	48 MIPS
Program Memory Size	64KB (64K x 8)
Program Memory Type	FLASH
RAM Size	4.25K x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.25V
Data Converters	A/D 32x10b
Number of I/O	40
Connectivity	EBI/EMI, 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	48-TQFP
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the C8051F388-GQ is determined by strict equivalence across the following critical parameters:

Core Architecture: 8051 processor core
Memory Configuration: 64KB Flash program memory and 4.25KB RAM
Performance: 48 MIPS execution speed
Analog Capability: 32-channel 10-bit ADC
Peripheral Set: Identical connectivity (EBI/EMI, I2C, SPI, UART/USART) and integrated functions (Brown-out Detect/Reset, POR, PWM, Temperature Sensor, WDT)
Electrical Specifications: Supply voltage range 2.7V ~ 5.25V
Package: 48-TQFP form factor
Operating Temperature Range: -40°C ~ 85°C

The C8051F388-B-GQ qualifies as a direct substitute because it maintains identical specifications across all critical parameters while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	C8051F388-GQ	C8051F388-B-GQ	Match
Manufacturer	Silicon Labs	Silicon Labs	✓
Series	C8051F38x	C8051F38x	✓
Core Processor	8051	8051	✓
Core Size	8-Bit	8-Bit	✓
Speed	48 MIPS	48 MIPS	✓
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	✓
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.25V	2.7V ~ 5.25V	✓
Data Converters	A/D 32x10b	A/D 32x10b	✓
Number of I/O	40	40	✓
Connectivity	EBI/EMI, I2C, SPI, UART/USART	EBI/EMI, 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	48-TQFP	48-TQFP (7x7)	✓
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	✓
Product Status	Discontinued at DiGi Electronics	Active	Substitute Advantage
RoHS Status	Not Specified	ROHS3 Compliant	Substitute Advantage
REACH Status	Not Specified	REACH Unaffected	Substitute Advantage

Engineering Selection Recommendations

The C8051F388-B-GQ is the direct equivalent substitute for the C8051F388-GQ. Both devices are functionally identical across all electrical, memory, and peripheral specifications. The C8051F388-B-GQ offers the following advantages:

Product Status: Active availability versus discontinued status of the original part
Regulatory Compliance: ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements
Inventory: Higher stock availability (1225 Pcs versus 661 Pcs)
Packaging: Supplied in Tray packaging with specified 48-TQFP (7x7) dimensions

For applications currently using the C8051F388-GQ, direct substitution with the C8051F388-B-GQ requires no design modifications, firmware changes, or PCB alterations. Pin-to-pin compatibility and functional equivalence are complete.

Frequently Asked Questions (FAQ)

Q: Are the C8051F388-GQ and C8051F388-B-GQ pin-compatible?

A: Yes. Both devices use the 48-TQFP package with identical pin assignments, voltage requirements, and signal definitions. No PCB redesign is necessary.

Q: Can I use the C8051F388-B-GQ as a direct replacement in existing designs?

A: Yes. The C8051F388-B-GQ is a direct functional equivalent. All electrical specifications, memory configurations, peripheral sets, and operating parameters are identical. No firmware modifications are required.

Q: What is the difference between the C8051F388-GQ and C8051F388-B-GQ?

A: The primary differences are product status and compliance certifications. The C8051F388-B-GQ is currently active with ROHS3 compliance and REACH unaffected status, while the C8051F388-GQ is discontinued. Functionally and electrically, they are identical.

Q: Does the packaging difference (Tray for C8051F388-B-GQ) affect compatibility?

A: No. Packaging format (Tray) affects only handling, storage, and logistics. The actual component specifications, pinout, and electrical characteristics remain unchanged.

Q: Are there any temperature or voltage rating differences?

A: No. Both parts operate across the identical temperature range (-40°C ~ 85°C) and voltage supply range (2.7V ~ 5.25V).

Q: What certifications does the C8051F388-B-GQ carry?

A: The C8051F388-B-GQ is ROHS3 compliant and REACH unaffected. Both devices carry identical ECCN (EAR99) and HTSUS (8542.31.0001) classifications.

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