PIC16LC73AT-04I/SO Equivalent & Substitute Parts

Part Overview

The PIC16LC73AT-04I/SO is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, designed for embedded applications requiring low-power operation and integrated peripheral support. This device features 7KB of OTP (One-Time Programmable) memory, 22 I/O pins, and operates at 4MHz with a supply voltage range of 2.5V to 6V. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

PIC16LC73AT-04I/SO

Microchip TechnologyIn Stock: 967PIC16LC73AT-04I/SO Datasheet

Current PartRFQ

PIC16LC73A-04I/SO

Microchip TechnologyIn Stock: 1256PIC16LC73A-04I/SO Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC16LC73AT-04I/SO is determined by strict equivalence across the following critical parameters:

• Core Architecture: PIC 8-bit processor
• Memory Configuration: 7KB (4K x 14) OTP program memory with 192 x 8 RAM
• Operating Frequency: 4MHz
• Supply Voltage Range: 2.5V ~ 6V
• I/O Count: 22 pins
• Peripheral Set: I2C, SPI, UART/USART connectivity with Brown-out Detect/Reset, POR, PWM, and WDT
• Package: 28-SOIC form factor
• Data Conversion: A/D 5x8b
• Environmental Compliance: ROHS3 Compliant, REACH Unaffected

The substitute part PIC16LC73A-04I/SO meets all these criteria identically, with the distinction that it maintains active product status while the original part is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LC73A-04I/SO is a direct functional equivalent to the PIC16LC73AT-04I/SO. All electrical specifications, memory architecture, peripheral configuration, and physical packaging are identical. The primary distinction is product lifecycle status: the original part is obsolete while the substitute maintains active production status.

For new designs or system replacements, the PIC16LC73A-04I/SO is the appropriate selection. Both parts carry ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part is available in higher inventory quantities (1207 pcs vs. 909 pcs), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Are PIC16LC73AT-04I/SO and PIC16LC73A-04I/SO pin-compatible?

A: Yes. Both devices use the 28-SOIC package with identical pin assignments, electrical characteristics, and functional capabilities.

Q: Can I use PIC16LC73A-04I/SO as a direct replacement in existing designs?

A: Yes. The substitute part is electrically and functionally equivalent across all specified parameters. No circuit modifications are required.

Q: What is the difference between these two part numbers?

A: The primary difference is product status. PIC16LC73AT-04I/SO is obsolete, while PIC16LC73A-04I/SO is actively produced. All technical specifications remain identical.

Q: Are there packaging differences between these parts?

A: The main part number does not specify packaging detail, while the substitute is supplied in Tube packaging. Both use the 28-SOIC form factor.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, with MSL rating of 1 (Unlimited).

Q: What memory configuration do these microcontrollers have?

A: Both devices feature 7KB (4K x 14) OTP program memory and 192 x 8 RAM, with no EEPROM.

Q: Are these parts suitable for low-voltage applications?

A: Yes. Both operate across a 2.5V to 6V supply voltage range, supporting low-power embedded applications.