Product Overview
Industrial 8-Pin OTP Microcontroller with ADC and EEPROM – 4MHz PIC Core
Condition
Unused, New Old Stock (NOS). Genuine legacy Microchip Technology device with date code 9952 (52nd week of 1999). 8-pin PDIP through-hole package. Visual inspection completed with no issues noted. Sourced from an electronics distributor consolidating long-held inventory.
Ships same business day. Hard-to-find parts since 1999. Fair prices, real help.
Product Overview
Microchip PIC12CE673-04I/P is a compact 8-bit CMOS RISC microcontroller from the late 1990s era of embedded design, when fitting real control logic into an 8-pin package felt ambitious. It integrates program memory, RAM, EEPROM, timer resources, and a 4-channel 8-bit ADC into a single PDIP footprint small enough for tight industrial boards and cost-sensitive production runs. The “04” speed grade supports operation up to 4 MHz, and the “I” designation confirms the industrial temperature range of -40°C to +85°C.
Unlike modern flash-based PIC devices, this version uses One-Time Programmable program memory. Once code is burned in, it is fixed. That permanence made it ideal for locked production firmware and purpose-built control modules where stability mattered more than field reprogramming. For legacy system repair, matching the original OTP device can be the difference between a working board and a redesign.
Key Features
- 8-bit CMOS RISC architecture with 35 single-word instructions
- Maximum clock frequency: 4 MHz
- 1.75 KB (1K x 14) One-Time Programmable program memory
- 128 bytes of on-chip RAM
- 16 bytes of internal EEPROM for non-volatile data storage
- 4-channel, 8-bit Analog-to-Digital Converter
- 8-bit Timer0 (TMR0)
- Watchdog Timer (WDT) for system reliability
- Industrial temperature rating: -40°C to +85°C
- 8-pin PDIP through-hole package
Applications
- Exact replacement in legacy industrial control boards
- Automotive sub-assemblies using fixed firmware
- Sensor threshold and monitoring modules
- Small appliance and HVAC control logic
- Calibration modules using onboard EEPROM storage
- Educational exploration of classic PIC architecture
- Compact embedded builds where 8-pin footprint is critical
Frequently Asked Questions
Is this chip reprogrammable like modern PIC devices?
No. The PIC12CE673 uses One-Time Programmable memory. Once firmware is programmed, it cannot be erased or rewritten.
Why would someone choose this instead of a newer PIC12F device?
Primarily for legacy repair or when exact firmware and hardware compatibility are required. Many older boards were designed specifically around this OTP architecture and timing behavior.
Does it include analog inputs?
Yes. It features a built-in 4-channel, 8-bit ADC suitable for basic sensor measurements and threshold detection.
What makes the industrial grade important?
The -40°C to +85°C rating ensures reliable operation in equipment exposed to wide temperature swings, common in industrial and automotive environments.
Is this suitable for new product development?
For new designs, engineers typically use flash-based PIC variants for flexibility. This device is best suited for maintaining or reproducing established designs where firmware permanence is intentional.
Eight pins. Fixed firmware. Late-90s Microchip silicon that powered thousands of quiet control boards. If you are keeping a legacy system alive or matching an original build exactly, this is the kind of part that makes the repair possible.
