PIC16LC72-04I/SO Equivalent & Substitute Parts

Part Overview

The PIC16LC72-04I/SO is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 4.6KB OTP program memory, 128 x 8 bytes of RAM, and 22 I/O pins. This 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. The part is actively produced and ROHS3 compliant. Identifying equivalent substitute parts is necessary when OTP (One-Time Programmable) memory limitations require reprogrammable alternatives, when higher operating speeds are needed, or when supply constraints necessitate alternative sourcing.

Substiute Parts

PIC16LC72-04I/SO

Microchip TechnologyIn Stock: 866PIC16LC72-04I/SO Datasheet

Current PartRFQ

PIC16LF72-I/SO

Microchip TechnologyIn Stock: 2205PIC16LF72-I/SO Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC72-04I/SO is determined by strict equivalence in the following parameters:

• Core Processor & Architecture: Must be PIC processor family
• Core Size: Must remain 8-Bit
• Program Memory Size: Must be 4.6KB (2K x 14)
• RAM Size: Must be 128 x 8 bytes
• Number of I/O Pins: Must be 22
• Package Type: Must be 28-SOIC with identical physical dimensions
• Connectivity: Must support I2C and SPI
• Peripherals: Must include Brown-out Detect/Reset, POR, PWM, and WDT
• Data Converters: Must include A/D 5x8b
• Operating Temperature Range: Must support -40°C ~ 85°C

The primary distinction between the main part and its substitute is the program memory technology: OTP versus FLASH. FLASH memory allows multiple reprogramming cycles, whereas OTP allows single programming. Speed and voltage supply ranges may vary within acceptable operational parameters for the application.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC16LC72-04I/SO and PIC16LF72-I/SO are active products from Microchip Technology with ROHS3 compliance and REACH unaffected status. Selection between these parts depends on application requirements:

PIC16LC72-04I/SO is appropriate for applications where OTP programming is acceptable and lower operating speed (4MHz) meets functional requirements. This part supports a wider supply voltage range (2.5V ~ 6V).

PIC16LF72-I/SO is appropriate for applications requiring reprogrammable FLASH memory, higher operating speed (20MHz), and improved moisture handling (MSL 1 versus MSL 3). The supply voltage range is 2V ~ 5.5V, which is narrower but overlaps the operational window of the main part.

Both devices maintain identical pin counts, I/O configuration, peripheral set, and package dimensions, ensuring direct mechanical and electrical compatibility in 28-SOIC surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can PIC16LF72-I/SO directly replace PIC16LC72-04I/SO in existing designs?

A: Yes, from a mechanical and electrical standpoint. Both parts use the 28-SOIC package with identical pin assignments, I/O count, and peripheral functionality. However, the supply voltage range differs slightly (2V ~ 5.5V for the substitute versus 2.5V ~ 6V for the main part). Verify that your application's supply voltage falls within 2V ~ 5.5V for full compatibility.

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

A: The main difference is program memory technology. PIC16LC72-04I/SO uses OTP (One-Time Programmable) memory, allowing a single programming cycle. PIC16LF72-I/SO uses FLASH memory, allowing multiple reprogramming cycles. Additionally, PIC16LF72-I/SO operates at 20MHz compared to 4MHz for the main part.

Q: Are there any moisture sensitivity considerations?

A: Yes. PIC16LC72-04I/SO has MSL 3 (168 hours), while PIC16LF72-I/SO has MSL 1 (unlimited). MSL 1 indicates superior moisture resistance and longer shelf life without baking requirements.

Q: Do both parts support the same communication protocols?

A: Yes. Both parts include I2C and SPI connectivity and identical peripheral sets including PWM, watchdog timer, brown-out detection, and 5-channel 8-bit analog-to-digital conversion.

Q: What is the impact of the speed difference (4MHz vs. 20MHz)?

A: PIC16LF72-I/SO operates at 5 times the clock speed. This allows faster instruction execution and higher throughput. Applications designed for 4MHz operation will function correctly at 20MHz, but power consumption may increase. Verify that your application firmware is compatible with the higher clock speed.