PIC16LC554-04I/P Equivalent & Substitute Parts

Part Overview

The PIC16LC554-04I/P is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring low-power operation. This device features 896B of OTP (One-Time Programmable) memory, 80 x 8 bytes of RAM, and operates at 4MHz with a supply voltage range of 2.5V to 5.5V. The part is currently active in production and RoHS3 compliant. Substitute parts are identified when equivalent functional requirements can be met within the allowed electrical and mechanical parameters of the 18-DIP package category.

Substiute Parts

PIC16LC554-04I/P

Microchip TechnologyIn Stock: 995PIC16LC554-04I/P Datasheet

Current PartRFQ

PIC16F627A-I/P

Microchip TechnologyIn Stock: 4694PIC16F627A-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC554-04I/P is based on the following criteria:

Mechanical Compatibility: The substitute part must use the same 18-DIP (0.300", 7.62mm) package with through-hole mounting to ensure direct PCB compatibility without layout modifications.

Electrical Compatibility: The substitute must operate within the voltage supply range of 2.5V to 5.5V and maintain the same operating temperature range of -40°C to 85°C.

Core Architecture: The substitute must be a PIC 8-bit microcontroller from Microchip Technology to ensure instruction set compatibility and peripheral functionality alignment.

Compliance Requirements: The substitute must maintain RoHS3 compliance and MSL 1 rating to meet environmental and handling standards.

The PIC16F627A-I/P meets these substitution criteria while offering enhanced capabilities including FLASH memory (versus OTP), higher speed operation, and expanded I/O and peripheral features.

Parameter Comparison

Engineering Selection Recommendations

The PIC16F627A-I/P is qualified as a direct substitute for the PIC16LC554-04I/P based on package compatibility, voltage supply range overlap, and identical operating temperature specifications. Both devices maintain ROHS3 compliance and MSL 1 ratings, ensuring equivalent environmental and handling requirements.

The PIC16F627A-I/P offers increased program memory capacity (1.75KB versus 896B), expanded RAM (224 x 8 versus 80 x 8), and additional I/O pins (16 versus 13). The substitute operates at higher clock speeds (20MHz versus 4MHz) and uses FLASH memory technology instead of OTP, enabling field reprogramming capability. The minimum supply voltage for the substitute is 3V, which is compatible with applications operating at or above this threshold within the 2.5V to 5.5V range of the original part.

Frequently Asked Questions (FAQ)

Q: Can the PIC16F627A-I/P be used as a direct replacement for the PIC16LC554-04I/P in existing designs?

A: Yes, the PIC16F627A-I/P is mechanically and electrically compatible for applications operating at 3V or higher. Both devices use the 18-DIP package and share the same pinout. Verify that your application's minimum supply voltage is 3V or above, as the substitute does not support operation below this threshold.

Q: What are the key differences between these two microcontrollers?

A: The primary differences are memory type (OTP versus FLASH), memory capacity (896B versus 1.75KB program memory), operating speed (4MHz versus 20MHz), and I/O count (13 versus 16 pins). The PIC16F627A-I/P provides greater flexibility through reprogrammable FLASH memory and higher performance capability.

Q: Are there any package or mounting considerations when substituting these parts?

A: Both devices use identical 18-DIP (0.300", 7.62mm) through-hole packages. No PCB layout modifications are required for mechanical substitution. Pin assignments are compatible between the two devices.

Q: Do both parts meet the same compliance standards?

A: Yes, both the PIC16LC554-04I/P and PIC16F627A-I/P are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings. They meet equivalent environmental and handling requirements.

Q: What is the minimum supply voltage requirement for the substitute part?

A: The PIC16F627A-I/P requires a minimum supply voltage of 3V, compared to 2.5V for the original PIC16LC554-04I/P. Applications requiring operation below 3V must use the original part or identify alternative substitutes with lower voltage specifications.