PIC16LC774T/L Equivalent & Substitute Parts

Part Overview

The PIC16LC774T/L is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 7KB OTP program memory, 256 bytes of RAM, and integrated peripherals including PWM, watchdog timer, and brown-out detection. Designed for embedded applications requiring low-power operation across a 2.5V to 5.5V supply range, this device operates at up to 20MHz with 33 I/O pins in a 44-PLCC package.

The PIC16LC774T/L carries an Obsolete product status, making identification of functionally equivalent alternatives essential for ongoing system support, maintenance, and new design implementations where this architecture remains suitable.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Speed	20MHz
Program Memory Size	7KB (4K x 14)
Program Memory Type	OTP
RAM Size	256 x 8
Number of I/O	33
Voltage - Supply (Vcc/Vdd)	2.5V ~ 5.5V
Data Converters	A/D 10x12b
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	44-LCC (J-Lead)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16LC774T/L is determined by strict equivalence across the following critical parameters:

Core Architecture: PIC 8-bit processor
Memory Configuration: 7KB (4K x 14) OTP program memory and 256 x 8 RAM
Clock Speed: 20MHz maximum operating frequency
I/O Count: 33 I/O pins
Supply Voltage Range: 2.5V ~ 5.5V
Package Format: 44-LCC (J-Lead) surface mount
Peripheral Set: I2C, SPI, UART/USART, PWM, WDT, brown-out detection, POR
Data Conversion: 10-channel 12-bit A/D converter
Temperature Range: 0°C ~ 70°C

The PIC16LC774/L meets all substitution criteria as a direct equivalent, maintaining identical electrical specifications, memory architecture, peripheral functionality, and physical packaging.

Parameter Comparison

Parameter	PIC16LC774T/L (Main)	PIC16LC774/L (Substitute)	Match
Core Processor	PIC	PIC	✓
Core Size	8-Bit	8-Bit	✓
Speed	20MHz	20MHz	✓
Program Memory Size	7KB (4K x 14)	7KB (4K x 14)	✓
Program Memory Type	OTP	OTP	✓
RAM Size	256 x 8	256 x 8	✓
Number of I/O	33	33	✓
Voltage - Supply (Vcc/Vdd)	2.5V ~ 5.5V	2.5V ~ 5.5V	✓
Data Converters	A/D 10x12b	A/D 10x12b	✓
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART	✓
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	✓
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	✓
Package / Case	44-LCC (J-Lead)	44-LCC (J-Lead)	✓
Mounting Type	Surface Mount	Surface Mount	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓

Engineering Selection Recommendations

The PIC16LC774/L is a direct functional equivalent to the PIC16LC774T/L. Both devices share identical electrical specifications, memory architecture, peripheral functionality, and physical packaging. The primary distinction is product status: the main part is classified as Obsolete, while the substitute carries Active status.

For applications currently using the PIC16LC774T/L, the PIC16LC774/L provides continuity of supply and design compatibility. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements. The substitute part is available in Tube packaging with improved moisture sensitivity level (MSL 1 vs. MSL 3), indicating superior moisture protection during storage and handling.

Selection between these parts should be based on availability, packaging requirements, and supply chain considerations rather than technical performance, as electrical and functional characteristics are identical.

Frequently Asked Questions (FAQ)

Q: Are the PIC16LC774T/L and PIC16LC774/L pin-compatible?

A: Yes. Both devices use the 44-LCC (J-Lead) package with identical pinout, voltage ratings, and I/O configuration. Direct socket substitution is supported.

Q: What is the difference between OTP and other memory types in these devices?

A: OTP (One-Time Programmable) memory allows a single programming cycle after which the code cannot be modified. Both the main part and substitute use OTP technology, making them functionally equivalent for production applications.

Q: Does the Obsolete status of the PIC16LC774T/L affect compatibility with the PIC16LC774/L?

A: No. Obsolete status indicates end-of-life for the main part number. The substitute part with Active status provides equivalent functionality and is the recommended source for new inventory. Existing designs require no modification.

Q: What does MSL (Moisture Sensitivity Level) mean, and why does it differ between these parts?

A: MSL indicates moisture absorption limits during storage. The substitute part (MSL 1) has unlimited shelf life under controlled conditions, while the main part (MSL 3) requires reflow within 168 hours of moisture exposure. For long-term storage, the substitute offers superior reliability.

Q: Can these devices operate at voltages outside the 2.5V to 5.5V range?

A: No. Both parts are specified for 2.5V to 5.5V operation. Operating outside this range voids electrical specifications and may cause device failure.

Q: Are there any differences in the peripheral feature set between these parts?

A: No. Both devices include identical peripherals: I2C, SPI, UART/USART, PWM, watchdog timer, brown-out detection, and power-on reset. Firmware compatibility is maintained.

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