PIC16LC67-04I/PQ Equivalent & Substitute Parts

Part Overview

The PIC16LC67-04I/PQ is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 14KB OTP program memory, 368 x 8 bytes of RAM, and 33 I/O pins. The device operates at 4MHz with a supply voltage range of 2.5V to 6V and includes integrated peripherals such as PWM, WDT, brown-out detection, and communication interfaces (I2C, SPI, UART/USART). The product maintains Active status with full RoHS3 compliance. Substitute parts are identified when equivalent core functionality, memory architecture, I/O configuration, and package form factor are maintained while allowing variations in program memory type, speed rating, and voltage specifications within acceptable engineering parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	PIC16LC67-04I/PQ
Manufacturer	Microchip Technology
Core Processor	PIC
Core Size	8-Bit
Program Memory Size	14KB (8K x 14)
Program Memory Type	OTP
RAM Size	368 x 8
Number of I/O	33
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Package / Case	44-QFP
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the PIC16LC67-04I/PQ is determined by strict equivalence in the following parameters:

Core Architecture: 8-bit PIC processor with identical instruction set compatibility
Memory Architecture: 14KB (8K x 14) program memory capacity and 368 x 8 RAM configuration
I/O Configuration: 33 I/O pins with identical pin assignment and functionality
Peripheral Set: Identical integration of I2C, SPI, UART/USART, PWM, WDT, brown-out detection, and POR
Package Form Factor: 44-pin QFP/TQFP surface mount package (10x10mm footprint)
Operating Temperature Range: -40°C to 85°C
Compliance: RoHS3 and REACH compliance maintained

Variations permitted in substitute parts include program memory type (OTP to FLASH), maximum operating speed (4MHz to higher ratings), and supply voltage range (2.5V–6V to 2V–5.5V), provided these do not restrict the original application requirements.

Parameter Comparison

Parameter	PIC16LC67-04I/PQ (Main Part)	PIC16LF77-I/PT (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	PIC	PIC
Core Size	8-Bit	8-Bit
Program Memory Size	14KB (8K x 14)	14KB (8K x 14)
Program Memory Type	OTP	FLASH
Speed	4MHz	20MHz
RAM Size	368 x 8	368 x 8
Number of I/O	33	33
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT
Voltage - Supply (Vcc/Vdd)	2.5V ~ 6V	2V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	44-QFP	44-TQFP
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The PIC16LF77-I/PT qualifies as a direct substitute for the PIC16LC67-04I/PQ based on identical core architecture, memory capacity, I/O configuration, and peripheral integration. Both devices maintain Active product status and full RoHS3 compliance.

The primary technical distinction is program memory type: the substitute employs FLASH memory instead of OTP, enabling field reprogrammability and in-circuit programming capability. The substitute also provides increased maximum operating speed (20MHz versus 4MHz) and operates within a slightly narrower supply voltage range (2V–5.5V versus 2.5V–6V). These variations do not restrict substitution in applications where the original 4MHz speed requirement is satisfied by the substitute's higher rating, and where the supply voltage remains within the 2V–5.5V window.

Both devices are manufactured by Microchip Technology and carry identical MSL ratings and compliance certifications, ensuring equivalent reliability and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the PIC16LF77-I/PT replace the PIC16LC67-04I/PQ in existing designs?

A: Yes, provided the application supply voltage remains within 2V–5.5V and the 4MHz speed requirement is satisfied by the substitute's 20MHz capability. The identical pin count, I/O configuration, memory architecture, and peripheral set ensure functional compatibility at the circuit level.

Q: What is the primary advantage of the PIC16LF77-I/PT substitute?

A: The substitute features FLASH program memory, enabling field reprogramming and in-circuit programming without device replacement. The OTP variant requires device replacement for firmware updates.

Q: Are the 44-QFP and 44-TQFP packages pin-compatible?

A: Both packages are 44-pin surface mount devices with 10x10mm footprints and identical pin assignments. They are mechanically and electrically compatible for PCB layout purposes.

Q: Does the higher speed rating of the substitute affect power consumption?

A: The substitute's 20MHz maximum rating does not mandate operation at this speed. Applications may operate the PIC16LF77-I/PT at 4MHz or lower, matching the original device's power profile. Speed rating indicates maximum capability, not required operating frequency.

Q: Are there supply voltage considerations when substituting?

A: The original device operates from 2.5V–6V, while the substitute operates from 2V–5.5V. Designs operating above 5.5V require the original PIC16LC67-04I/PQ. Designs within the 2.5V–5.5V range are compatible with both devices.

Q: Do both devices require identical handling and storage procedures?

A: Yes. Both devices carry MSL rating 3 (168 hours), requiring identical moisture control, storage conditions, and reflow procedures during assembly.

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