PIC16LC717-I/SO Equivalent & Substitute Parts

Part Overview

The PIC16LC717-I/SO is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring low-power operation and basic I/O control. This device features 4.6KB of OTP (One-Time Programmable) memory, 15 I/O pins, and operates across a 2.5V to 5.5V supply range. The product maintains Active status within Microchip's portfolio. Identifying equivalent and substitute parts becomes necessary when OTP memory limitations require reprogramming capability, when higher I/O pin counts are needed, or when FLASH-based memory alternatives offer design flexibility advantages.

Substiute Parts

PIC16LC717-I/SO

Microchip TechnologyIn Stock: 2055PIC16LC717-I/SO Datasheet

Current PartRFQ

PIC16F690-I/SO

Microchip TechnologyIn Stock: 35321PIC16F690-I/SO Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC717-I/SO is determined by the following critical parameters:

Core Architecture Compatibility: Both the main part and substitute must utilize the PIC core processor architecture to ensure instruction set compatibility and software portability.

Operating Specifications: Matching or exceeding clock speed (20MHz), supply voltage range (minimum 2.5V, maximum 5.5V), and operating temperature range (-40°C to 85°C) ensures functional equivalence in target applications.

Memory Configuration: While program memory type may differ (OTP to FLASH), total addressable memory capacity and RAM size (256 x 8) must remain consistent or provide greater capacity to support existing firmware.

I/O and Peripheral Feature Set: The substitute must provide equal or greater I/O pin count and maintain core peripheral functions including Brown-out Detect/Reset, POR, PWM, and WDT to preserve application functionality.

Package and Mounting: Surface mount SOIC packaging with compatible pin pitch (0.295", 7.50mm width) ensures PCB-level compatibility without redesign.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status must be maintained for supply chain and regulatory consistency.

The PIC16F690-I/SO qualifies as a direct substitute based on these criteria, offering enhanced capabilities within the same architectural family.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F690-I/SO serves as a qualified substitute for the PIC16LC717-I/SO based on the following engineering criteria:

Memory Technology Upgrade: The transition from OTP to FLASH memory enables field reprogramming and in-circuit updates, eliminating the single-program limitation of OTP devices. This provides significant advantages in development, testing, and field service scenarios.

Enhanced Capacity: The PIC16F690-I/SO provides double the program memory (7KB versus 4.6KB) and adds 256 x 8 bytes of EEPROM, accommodating larger firmware images and enabling persistent data storage without sacrificing core functionality.

Expanded I/O and Connectivity: Three additional I/O pins (18 versus 15) and UART/USART connectivity support more complex interfacing requirements while maintaining backward compatibility with existing I2C and SPI protocols.

Improved Analog Capability: The 12-channel 10-bit A/D converter (versus 6-channel) provides enhanced analog signal processing capacity for sensor-based applications.

Regulatory and Supply Chain Alignment: Both devices maintain Active product status, ROHS3 compliance, and REACH unaffected designation, ensuring consistent supply chain support and regulatory acceptance.

Package Consideration: The PIC16F690-I/SO uses a 20-SOIC package versus the 18-SOIC of the main part. PCB layout modification is required to accommodate the additional pins and slightly different pin configuration.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F690-I/SO directly replace the PIC16LC717-I/SO without firmware changes?

A: The PIC16F690-I/SO maintains instruction set compatibility with the PIC16LC717-I/SO due to shared PIC core architecture. Existing firmware compiled for the PIC16LC717-I/SO will execute on the PIC16F690-I/SO without modification. However, PCB layout changes are necessary due to the 20-SOIC package versus 18-SOIC, and pin assignments differ between the two devices.

Q: What are the key advantages of FLASH memory over OTP?

A: FLASH memory enables multiple reprogramming cycles, field firmware updates, and in-circuit programming without device replacement. OTP memory permits only a single programming operation, making it suitable only for production-ready designs. FLASH provides development flexibility and supports iterative design refinement.

Q: Are there supply voltage compatibility concerns?

A: The PIC16F690-I/SO operates across 2V to 5.5V, while the PIC16LC717-I/SO requires 2.5V minimum. The substitute accepts lower supply voltages, providing broader operational flexibility. Existing designs operating at 2.5V or higher remain fully compatible.

Q: How do the analog converter specifications compare?

A: The PIC16LC717-I/SO provides 6 channels of 10-bit A/D conversion. The PIC16F690-I/SO provides 12 channels of 10-bit A/D conversion, doubling analog input capacity. Applications requiring only 6 channels will function identically; applications requiring additional analog inputs benefit from the expanded capability.

Q: What PCB modifications are required for substitution?

A: The PIC16F690-I/SO uses a 20-pin SOIC package compared to the 18-pin SOIC of the main part. Pin assignments differ between devices. PCB footprint modification and routing changes are mandatory. Consult device datasheets for detailed pinout comparison before layout redesign.

Q: Are both devices suitable for the same operating temperature range?

A: Yes. Both the PIC16LC717-I/SO and PIC16F690-I/SO operate across -40°C to 85°C, ensuring thermal compatibility in equivalent applications.