PIC16LC57C-04/SS Equivalent & Substitute Parts

Part Overview

The PIC16LC57C-04/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 3KB OTP program memory, 72 x 8 bytes of RAM, and 20 I/O pins. This device operates at 4MHz with an external oscillator and supports a supply voltage range of 2.5V to 5.5V. The part is actively produced and RoHS3 compliant. Equivalent and substitute parts are identified for applications requiring alternative memory technologies, extended temperature ranges, or higher clock speeds while maintaining core functional compatibility.

Key Parameters

Parameter	Value
Core Processor	PIC
Core Size	8-Bit
Program Memory Type	OTP
Program Memory Size	3KB (2K x 12)
RAM Size	72 x 8
Number of I/O	20
Peripherals	POR, WDT
Voltage - Supply (Vcc/Vdd)	2.5V ~ 5.5V
Mounting Type	Surface Mount
Package / Case	28-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the PIC16LC57C-04/SS is determined by the following critical parameters:

Core Processor Architecture: Must be PIC to ensure instruction set compatibility
Core Size: Must remain 8-Bit
Program Memory Size: Must be 3KB (2K x 12) to accommodate existing firmware
RAM Size: Must be 72 x 8 bytes
Number of I/O: Must be 20 pins
Peripherals: Must include POR and WDT functionality
Package / Case: Must be 28-SSOP with identical physical dimensions
Voltage Supply Range: Must support the application's operating voltage

The PIC16F57-I/SS qualifies as a direct substitute based on these parameters. While it features FLASH memory instead of OTP and operates at higher speed (20MHz vs. 4MHz), it maintains identical core architecture, memory capacity, I/O count, and package specifications. The extended temperature range (-40°C to 85°C) and lower minimum supply voltage (2V vs. 2.5V) provide additional operational flexibility.

Parameter Comparison

Parameter	PIC16LC57C-04/SS (Main Part)	PIC16F57-I/SS (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Series	PIC® 16C	PIC® 16F
Core Processor	PIC	PIC
Core Size	8-Bit	8-Bit
Speed	4MHz	20MHz
Program Memory Type	OTP	FLASH
Program Memory Size	3KB (2K x 12)	3KB (2K x 12)
RAM Size	72 x 8	72 x 8
Number of I/O	20	20
Peripherals	POR, WDT	POR, WDT
Voltage - Supply (Vcc/Vdd)	2.5V ~ 5.5V	2V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Oscillator Type	External	External
Mounting Type	Surface Mount	Surface Mount
Package / Case	28-SSOP (0.209", 5.30mm Width)	28-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Both the PIC16LC57C-04/SS and PIC16F57-I/SS are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current applications. Selection between these parts depends on application-specific requirements:

The PIC16LC57C-04/SS is appropriate for applications with fixed firmware requirements and lower speed demands, leveraging OTP memory for cost-optimized production volumes.

The PIC16F57-I/SS is suitable for applications requiring firmware flexibility, extended temperature operation, or higher processing speed. FLASH memory enables field reprogramming and development iteration. The wider operating temperature range (-40°C to 85°C) accommodates industrial and automotive environments beyond the standard commercial range (0°C to 70°C).

Both devices maintain identical pinout, memory architecture, and I/O configuration, ensuring direct functional compatibility at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can PIC16F57-I/SS directly replace PIC16LC57C-04/SS in existing designs?

A: Yes. Both devices share identical core architecture, program memory capacity (3KB), RAM size (72 x 8), I/O count (20), and 28-SSOP package dimensions. Pin-for-pin compatibility is maintained.

Q: What is the primary difference between these parts?

A: The main difference is program memory technology. PIC16LC57C-04/SS uses OTP (One-Time Programmable) memory, while PIC16F57-I/SS uses FLASH memory, allowing multiple reprogramming cycles. Additionally, PIC16F57-I/SS operates at 20MHz versus 4MHz and supports an extended temperature range.

Q: Does the speed difference (4MHz vs. 20MHz) affect compatibility?

A: No. The PIC16F57-I/SS's higher speed is backward compatible. Firmware written for 4MHz operation will execute correctly on the 20MHz device. Timing-dependent code may require adjustment if the higher speed is utilized.

Q: Are there voltage supply differences?

A: The PIC16F57-I/SS supports a lower minimum supply voltage (2V vs. 2.5V), providing greater flexibility in low-power applications. Both devices support the same maximum voltage (5.5V).

Q: Which part should be selected for new designs?

A: For new designs, PIC16F57-I/SS is recommended due to active product status, FLASH memory reprogrammability, extended temperature range, and higher performance headroom. Both parts are actively produced and RoHS3 compliant.

Q: Are these parts available in alternative packages?

A: Both parts are specified in 28-SSOP packaging. No alternative package options are provided in the current data.

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