PIC16LC72-04I/SP Equivalent & Substitute Parts

Part Overview

The PIC16LC72-04I/SP is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP program memory, 128 bytes of RAM, and 22 I/O pins. The device operates at 4MHz with a supply voltage range of 2.5V to 6V and includes integrated peripherals such as PWM, watchdog timer, brown-out detection, and a 5-channel 8-bit analog-to-digital converter.

This part is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing system support, redesigns, or when original inventory becomes unavailable. The PIC16LF72-I/SP provides a direct functional alternative with enhanced specifications and active product status.

Substiute Parts

PIC16LC72-04I/SP

Microchip TechnologyIn Stock: 720PIC16LC72-04I/SP Datasheet

Current PartRFQ

PIC16LF72-I/SP

Microchip TechnologyIn Stock: 2133PIC16LF72-I/SP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PIC16LF72-I/SP qualifies as a direct substitute based on the following alignment of critical parameters:

Core architecture and I/O configuration are identical: both devices are 8-bit PIC microcontrollers with 22 I/O pins, 4.6KB program memory capacity, and 128 bytes of RAM. Both support the same peripheral set including I2C, SPI, PWM, watchdog timer, and brown-out detection with identical 5-channel 8-bit analog-to-digital converter functionality.

Physical compatibility is maintained: both parts use the 28-DIP (0.300", 7.62mm) through-hole package, enabling direct socket replacement without PCB redesign.

Operating temperature range is identical: -40°C to 85°C ensures thermal compatibility across the same application environments.

The primary technical difference is program memory technology: the PIC16LC72-04I/SP uses OTP (One-Time Programmable) memory, while the PIC16LF72-I/SP uses FLASH memory. This distinction allows the substitute to support reprogramming, a significant advantage for development and field updates. The PIC16LF72-I/SP also operates at 20MHz versus 4MHz, providing higher performance headroom while remaining backward compatible with 4MHz-designed applications.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LF72-I/SP is suitable as a substitute for the obsolete PIC16LC72-04I/SP in applications requiring continued system support or component replenishment. Both devices maintain identical compliance certifications (ROHS3, REACH Unaffected, EAR99) and tariff classifications, ensuring regulatory continuity.

The substitute offers active product status with confirmed inventory availability (2100 units), whereas the main part is obsolete. The FLASH memory technology of the PIC16LF72-I/SP enables field reprogramming and development flexibility not available with OTP memory.

The supply voltage range of the substitute (2V ~ 5.5V) is slightly narrower than the main part (2.5V ~ 6V). Applications operating below 2V or above 5.5V require voltage regulation or alternative component selection. The increased clock speed (20MHz versus 4MHz) provides performance headroom and is backward compatible with 4MHz-designed firmware.

Frequently Asked Questions (FAQ)

Q: Can the PIC16LF72-I/SP directly replace the PIC16LC72-04I/SP without PCB modifications?

A: Yes. Both devices use the 28-DIP (0.300", 7.62mm) through-hole package with identical pinout and I/O configuration. Direct socket replacement is possible without PCB redesign.

Q: What is the primary functional difference between these parts?

A: The main difference is program memory technology. The PIC16LC72-04I/SP uses OTP (One-Time Programmable) memory, which cannot be erased or reprogrammed after initial programming. The PIC16LF72-I/SP uses FLASH memory, which supports multiple program cycles, enabling field updates and development flexibility.

Q: Are there voltage supply considerations when substituting?

A: The substitute operates at 2V ~ 5.5V, while the original operates at 2.5V ~ 6V. Applications requiring operation below 2V or above 5.5V must implement voltage regulation or select an alternative component. Most standard 5V and 3.3V systems operate within the substitute's voltage range.

Q: Does the higher clock speed of the substitute affect firmware compatibility?

A: The PIC16LF72-I/SP operates at 20MHz compared to the original 4MHz. Firmware designed for 4MHz remains functional on the 20MHz device. Timing-dependent code may execute faster; applications using hardware timers or external synchronization should verify timing behavior.

Q: Are compliance certifications maintained with the substitute?

A: Yes. Both devices carry identical ROHS3 compliance, REACH Unaffected status, and EAR99 export classification, ensuring regulatory continuity in system designs.

Q: What is the inventory status of each part?

A: The PIC16LC72-04I/SP is obsolete with 638 units in stock. The PIC16LF72-I/SP is active with 2100 units available, providing greater long-term supply assurance.