PIC16LC621-04E/SS Equivalent & Substitute Parts

Part Overview

The PIC16LC621-04E/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 1.75KB of OTP (One-Time Programmable) memory, 80 bytes of RAM, and 13 I/O pins. Designed for embedded applications requiring low-power operation across a wide supply voltage range (2.5V to 6V), this device operates at 4MHz with integrated brown-out detection, power-on reset, and watchdog timer functionality.

The PIC16LC621-04E/SS carries an obsolete product status. Locating equivalent or substitute components is necessary for legacy system maintenance, board redesigns, or when original inventory becomes unavailable. Active alternatives with identical or compatible electrical and mechanical specifications are available to support continued system operation.

Substiute Parts

PIC16LC621-04E/SS

Microchip TechnologyIn Stock: 786PIC16LC621-04E/SS Datasheet

Current PartRFQ

PIC16LC621-04I/SS

Microchip TechnologyIn Stock: 976PIC16LC621-04I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC621-04E/SS is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Core processor architecture (PIC)
• Core size (8-Bit)
• Operating frequency (4MHz)
• Program memory capacity and type (1.75KB OTP)
• RAM capacity (80 x 8)
• I/O pin count (13)
• Supply voltage range (2.5V ~ 6V)
• Integrated peripherals (Brown-out Detect/Reset, POR, WDT)

Mechanical Compatibility Requirements:

• Package type (20-SSOP)
• Physical dimensions (0.209", 5.30mm Width)
• Mounting type (Surface Mount)

Compliance Requirements:

• RoHS3 compliance
• MSL rating (1 - Unlimited)

The PIC16LC621-04I/SS qualifies as a direct substitute based on identical electrical and mechanical specifications. The primary distinction is product status (active vs. obsolete) and operating temperature range, which does not affect functional substitution in applications designed for the original part's temperature specification.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LC621-04I/SS is a direct functional equivalent to the PIC16LC621-04E/SS. Both parts share identical electrical specifications, memory architecture, I/O configuration, and package form factor. The substitute part maintains active product status with Microchip Technology, ensuring continued availability and manufacturing support.

The operating temperature range difference (-40°C ~ 85°C for the substitute versus -40°C ~ 125°C for the original) does not constitute a functional limitation for applications designed within the substitute's temperature specification. Both parts carry ROHS3 compliance and unlimited moisture sensitivity rating, meeting equivalent environmental and regulatory requirements.

Selection of the PIC16LC621-04I/SS is appropriate for new designs, board revisions, or legacy system maintenance where the original part is unavailable. No design modifications are required for direct substitution in applications operating within the substitute part's specified temperature range.

Frequently Asked Questions (FAQ)

Q: Can the PIC16LC621-04I/SS replace the PIC16LC621-04E/SS in existing designs?

A: Yes. The substitute part is electrically and mechanically identical, with the same core processor, memory configuration, I/O count, supply voltage range, and package specifications. Direct substitution is possible without circuit modifications.

Q: What is the difference between the -04E and -04I designations?

A: The suffix designates the operating temperature range. The -04E variant operates from -40°C to 125°C, while the -04I variant operates from -40°C to 85°C. Both parts are otherwise functionally equivalent.

Q: Why is the original part marked obsolete?

A: The PIC16LC621-04E/SS has reached end-of-life status with Microchip Technology. The PIC16LC621-04I/SS remains in active production, providing continued component availability for legacy system support and new applications.

Q: Are there any package or pinout differences?

A: No. Both parts use the identical 20-SSOP package with 0.209" width and 5.30mm physical dimensions. Pinout and mechanical compatibility are guaranteed.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the PIC16LC621-04E/SS and PIC16LC621-04I/SS are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity). Regulatory and environmental requirements are equivalent.

Q: What applications are suitable for this microcontroller?

A: The 8-bit architecture, 4MHz speed, 1.75KB program memory, and integrated peripherals (brown-out detection, power-on reset, watchdog timer) make this device suitable for low-power embedded control applications, sensor interfaces, and legacy system designs requiring minimal processing capability.