PIC16LC770-I/P Equivalent & Substitute Parts

Part Overview

The PIC16LC770-I/P is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP (One-Time Programmable) memory, 20MHz operation, and 15 I/O pins in a 20-DIP package. This device is actively produced and widely used in embedded applications requiring low-cost, reliable microcontroller solutions.

Finding equivalent or substitute parts becomes necessary when the original PIC16LC770-I/P reaches end-of-life status, experiences supply constraints, or when design requirements shift toward reprogrammable memory solutions. The PIC16F819-I/P serves as the primary substitute, offering enhanced programmability through FLASH memory while maintaining core functional compatibility.

Substiute Parts

PIC16LC770-I/P

Microchip TechnologyIn Stock: 2237PIC16LC770-I/P Datasheet

Current PartRFQ

PIC16F819-I/P

Microchip TechnologyIn Stock: 80335PIC16F819-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC770-I/P is determined by the following critical parameters:

• Core Architecture: Both parts use the PIC core processor with 8-bit architecture
• Processing Speed: Both operate at 20MHz
• Program Memory Capacity: Both provide 4.6KB (2K x 14) memory
• RAM Configuration: Both include 256 x 8 RAM
• Operating Temperature Range: Both support -40°C ~ 85°C
• Connectivity: Both support I2C and SPI interfaces
• Peripherals: Both include Brown-out Detect/Reset, POR, PWM, and WDT

The primary difference lies in program memory type (OTP versus FLASH) and package configuration (20-DIP versus 18-DIP), which affects I/O pin count and voltage supply range compatibility.

Parameter Comparison

Engineering Selection Recommendations

PIC16LC770-I/P remains the appropriate choice for applications requiring:

• One-time programmable memory with permanent code storage
• Extended low-voltage operation (2.5V minimum supply)
• Six analog input channels with 12-bit resolution
• 15 dedicated I/O pins in a 20-pin package
• Active product status with established supply chains

PIC16F819-I/P is suitable as a substitute when:

• Reprogrammable FLASH memory is required for development or field updates
• Applications operate within 4V to 5.5V supply range
• Five analog input channels with 10-bit resolution are acceptable
• 16 I/O pins and integrated EEPROM storage provide design advantages
• Active product status and high inventory availability are priorities

Both devices maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Selection between these parts depends on memory reprogrammability requirements and specific voltage/analog input specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can PIC16F819-I/P directly replace PIC16LC770-I/P in existing designs?

A: Direct replacement requires PCB layout modification due to package differences (20-DIP versus 18-DIP). Pin assignments differ; the PIC16F819-I/P has 18 pins while the PIC16LC770-I/P has 20 pins. Firmware must be adapted to account for different ADC configurations (5x10b versus 6x12b) and the absence of EEPROM in the original part.

Q: What are the voltage supply differences between these parts?

A: The PIC16LC770-I/P operates from 2.5V to 5.5V, supporting low-voltage applications. The PIC16F819-I/P requires 4V to 5.5V minimum supply voltage, limiting its use in designs requiring sub-4V operation.

Q: How do the analog-to-digital converter specifications differ?

A: The PIC16LC770-I/P provides six 12-bit ADC channels, while the PIC16F819-I/P provides five 10-bit ADC channels. Applications requiring six analog inputs or 12-bit resolution cannot use the PIC16F819-I/P as a substitute.

Q: What is the significance of OTP versus FLASH memory?

A: OTP (One-Time Programmable) memory in the PIC16LC770-I/P is programmed once during manufacturing and cannot be altered. FLASH memory in the PIC16F819-I/P allows multiple reprogramming cycles, enabling field updates and development flexibility.

Q: Are there package compatibility considerations?

A: Yes. The PIC16LC770-I/P uses a 20-DIP package with 0.300" (7.62mm) pitch, while the PIC16F819-I/P uses an 18-DIP package with the same pitch. PCB redesign is necessary for substitution; existing 20-pin sockets cannot accommodate the 18-pin device without adapter solutions.

Q: Do both parts support the same communication protocols?

A: Yes. Both the PIC16LC770-I/P and PIC16F819-I/P support I2C and SPI connectivity, along with identical peripheral features including Brown-out Detect/Reset, Power-On Reset (POR), PWM, and Watchdog Timer (WDT).