PIC16LC73B-04/SS Equivalent & Substitute Parts

Part Overview

The PIC16LC73B-04/SS is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 7KB OTP program memory, 192 x 8 bytes of RAM, and 22 I/O pins. The device operates at 4MHz with a supply voltage range of 2.5V to 5.5V and includes integrated peripherals such as PWM, WDT, brown-out detection, and communication interfaces (I2C, SPI, UART/USART). This component is actively produced and RoHS3 compliant. Finding equivalent or substitute parts may be necessary due to inventory constraints, end-of-life considerations, or application requirements for enhanced performance specifications.

Substiute Parts

PIC16LC73B-04/SS

Microchip TechnologyIn Stock: 1139PIC16LC73B-04/SS Datasheet

Current PartRFQ

PIC16LF73-I/SS

Microchip TechnologyIn Stock: 3287PIC16LF73-I/SS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC73B-04/SS is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use the 28-SSOP package with identical physical dimensions (0.209", 5.30mm Width)
• Core Architecture: Both must be 8-bit PIC microcontrollers with identical I/O count (22 pins)
• Memory Configuration: Program memory size must be 7KB (4K x 14) and RAM must be 192 x 8 bytes
• Peripheral Set: Identical connectivity (I2C, SPI, UART/USART) and peripherals (Brown-out Detect/Reset, POR, PWM, WDT)
• Data Converter Specification: A/D converter must be 5x8b
• Supply Voltage Range: Must support the required operating voltage window
• Compliance: RoHS3 compliance and REACH unaffected status must be maintained

The PIC16LF73-I/SS qualifies as a direct substitute based on these parameters, with the primary difference being the program memory type (FLASH vs. OTP) and enhanced speed capability.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LF73-I/SS is a qualified substitute for the PIC16LC73B-04/SS based on the following engineering criteria:

• Identical Pinout and Package: Both devices use the 28-SSOP package with matching physical dimensions, ensuring direct PCB compatibility without layout modifications.
• Matching Memory Architecture: Program memory capacity (7KB) and RAM configuration (192 x 8) are identical, supporting equivalent firmware deployment.
• Peripheral Equivalence: All communication interfaces and integrated peripherals are functionally identical, maintaining system-level compatibility.
• Compliance Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.
• Enhanced Specifications: The substitute offers superior speed (20MHz vs. 4MHz) and extended operating temperature range (-40°C to 85°C vs. 0°C to 70°C), providing performance headroom for demanding applications.
• Active Product Status: Both devices are actively manufactured by Microchip Technology, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the PIC16LF73-I/SS be used as a direct replacement for the PIC16LC73B-04/SS?

A: Yes. Both devices share identical pinout, package dimensions, memory configuration, and peripheral set. The 28-SSOP package ensures mechanical and electrical compatibility without PCB redesign.

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

A: The main difference is the program memory type: the PIC16LC73B-04/SS uses OTP (One-Time Programmable) memory, while the PIC16LF73-I/SS uses FLASH memory. Additionally, the substitute offers higher clock speed (20MHz vs. 4MHz) and a wider operating temperature range.

Q: Are there any voltage supply considerations when substituting?

A: The PIC16LF73-I/SS has a minimum supply voltage of 2V, compared to 2.5V for the main part. Both support the same maximum of 5.5V. Applications operating below 2.5V must use the original PIC16LC73B-04/SS.

Q: Does the substitute part maintain the same moisture sensitivity level?

A: No. The PIC16LC73B-04/SS has MSL 1 (Unlimited), while the PIC16LF73-I/SS has MSL 2 (1 Year). Storage and handling procedures must follow the substitute's more stringent moisture sensitivity requirements.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the PIC16LC73B-04/SS and PIC16LF73-I/SS are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory standards.

Q: Can firmware written for the PIC16LC73B-04/SS run on the PIC16LF73-I/SS without modification?

A: Firmware compatibility depends on application-specific timing and speed requirements. The substitute's higher clock speed (20MHz) may require timing adjustments in delay loops or peripheral configurations. The identical memory architecture and peripheral set support functional equivalence.