PIC12C508A-04I/P Equivalent & Substitute Parts

Part Overview

The PIC12C508A-04I/P is an 8-bit microcontroller from Microchip Technology's PIC® 12C series, featuring 768B of OTP (One-Time Programmable) memory and operating at 4MHz. This device is designed for embedded applications requiring low-cost, single-chip solutions with minimal I/O requirements. The part is currently in active production status with verified programmability through DiGi-Electronics. Finding equivalent or substitute parts may be necessary due to inventory constraints, design revisions, or application-specific memory requirements.

Substiute Parts

PIC12C508A-04I/P

Microchip TechnologyIn Stock: 1156PIC12C508A-04I/P Datasheet

Current PartRFQ

PIC12F508-I/P

Microchip TechnologyIn Stock: 25435PIC12F508-I/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC12C508A-04I/P is determined by the following critical parameters:

• Core Processor & Architecture: Must be PIC processor family to maintain instruction set compatibility
• Core Size: Must remain 8-Bit
• Speed: Must support 4MHz operation
• Program Memory Size: Must provide 768B (512 x 12) capacity
• RAM Size: Must provide 25 x 8 bytes
• Number of I/O: Must provide minimum 5 I/O pins
• Voltage Supply Range: Substitute must operate within or encompass the 3V ~ 5.5V range
• Operating Temperature: Must support -40°C ~ 85°C range
• Package / Case: Must be 8-DIP (0.300", 7.62mm) for mechanical compatibility
• Peripherals: Must include POR and WDT functionality
• Mounting Type: Must be Through Hole

The primary distinction between the main part and its substitute relates to program memory type: OTP versus FLASH. This difference affects reprogrammability but does not impact electrical compatibility or functional operation in fixed-code applications.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC12C508A-04I/P and PIC12F508-I/P are active production devices from Microchip Technology with ROHS3 compliance and verified programmability. Selection between these parts should be based on application requirements:

The PIC12C508A-04I/P is suitable for applications where code is finalized and does not require field reprogramming. Its OTP memory is permanent and cost-effective for high-volume production runs.

The PIC12F508-I/P offers FLASH memory, enabling in-circuit reprogramming and field updates. This part also supports a lower minimum supply voltage of 2V, providing additional flexibility for battery-powered applications. The expanded voltage range (2V ~ 5.5V versus 3V ~ 5.5V) makes the PIC12F508-I/P compatible with a broader range of power supply designs.

Both devices maintain identical core architecture, I/O count, memory capacity, and thermal operating range, ensuring functional interchangeability at the circuit level when electrical specifications are met.

Frequently Asked Questions (FAQ)

Q: Can PIC12F508-I/P directly replace PIC12C508A-04I/P in existing designs?

A: Yes, at the circuit level. Both parts share identical pinout, package dimensions (8-DIP), electrical characteristics for core operation, and peripheral functionality. The primary difference is memory type: OTP versus FLASH. Existing firmware compiled for the PIC12C508A-04I/P will execute identically on the PIC12F508-I/P without modification.

Q: What is the key advantage of FLASH memory over OTP?

A: FLASH memory in the PIC12F508-I/P allows in-circuit reprogramming without device replacement. OTP memory in the PIC12C508A-04I/P is permanent and cannot be erased or rewritten after initial programming.

Q: Are there voltage supply differences that affect circuit design?

A: The PIC12F508-I/P operates from 2V ~ 5.5V, while the PIC12C508A-04I/P requires 3V ~ 5.5V. If your application uses a 2V supply, only the PIC12F508-I/P is suitable. For supplies at 3V or above, both parts are compatible.

Q: Do both parts have identical pin configurations?

A: Yes. Both the PIC12C508A-04I/P and PIC12F508-I/P use the 8-DIP package with 0.300" (7.62mm) spacing. Pin assignments and functional I/O are identical.

Q: Are there compliance or certification differences?

A: Both parts are ROHS3 compliant and REACH unaffected. Both maintain the same ECCN (EAR99) and HTSUS classifications. No compliance barriers exist for substitution.

Q: Which part should be selected for new designs?

A: Selection depends on reprogramming requirements. For fixed-code applications, either part is acceptable. For designs requiring field updates or development flexibility, the PIC12F508-I/P is the preferred choice due to FLASH memory and lower minimum voltage support.