PIC16LC74AT-04/L Equivalent & Substitute Parts

Part Overview

The PIC16LC74AT-04/L is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 7KB OTP program memory, 192 bytes of RAM, and integrated peripherals including PWM, watchdog timer, and brown-out detection. Housed in a 44-PLCC package, this device operates at 4MHz with a supply voltage range of 2.5V to 6V and supports I2C, SPI, and UART/USART connectivity.

The PIC16LC74AT-04/L carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and production requirements.

Substiute Parts

PIC16LC74AT-04/L

Microchip TechnologyIn Stock: 1113PIC16LC74AT-04/L Datasheet

Current PartRFQ

PIC16LC74A-04/L

Microchip TechnologyIn Stock: 917PIC16LC74A-04/L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PIC16LC74AT-04/L is determined by strict equivalence across the following critical parameters:

• Core Processor Architecture: PIC processor family
• Core Size: 8-Bit instruction set
• Program Memory: 7KB (4K x 14) OTP configuration
• RAM Capacity: 192 x 8 bytes
• Operating Speed: 4MHz clock frequency
• Supply Voltage Range: 2.5V ~ 6V
• I/O Count: 33 pins
• Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity Interfaces: I2C, SPI, UART/USART
• Package Type: 44-LCC (J-Lead) surface mount
• Data Converter Specification: A/D 5x8b

The PIC16LC74A-04/L qualifies as a direct substitute, maintaining identical electrical specifications, memory configuration, peripheral functionality, and package format while offering Active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The PIC16LC74A-04/L is the direct substitute for the PIC16LC74AT-04/L. Both devices are manufactured by Microchip Technology and maintain identical electrical, functional, and package specifications. The primary distinction is product lifecycle status: the original part is Obsolete while the substitute is Active.

Selection of the PIC16LC74A-04/L is supported by:

• Full parameter equivalence across all critical specifications
• ROHS3 compliance maintained
• Identical MSL rating (3, 168 Hours)
• Active product status ensuring continued availability and supply chain support
• Same packaging format (44-LCC J-Lead) enabling direct PCB compatibility

No design modifications, firmware adjustments, or board layout changes are required when transitioning from PIC16LC74AT-04/L to PIC16LC74A-04/L.

Frequently Asked Questions (FAQ)

Q: Can PIC16LC74A-04/L be used as a direct replacement for PIC16LC74AT-04/L?

A: Yes. The PIC16LC74A-04/L is a direct substitute with identical electrical specifications, memory configuration, peripheral functionality, and 44-LCC package format. No design changes are necessary.

Q: What is the primary reason to substitute the PIC16LC74AT-04/L?

A: The PIC16LC74AT-04/L carries Obsolete product status. The PIC16LC74A-04/L offers the same functionality with Active status, ensuring long-term supply availability and support.

Q: Are there any differences in packaging between these parts?

A: No. Both devices use the 44-LCC (J-Lead) surface mount package with identical dimensions (16.59x16.59mm). PCB footprints are fully compatible.

Q: Do firmware or software modifications apply when switching to the substitute part?

A: No. Both parts implement the same PIC 16C architecture, instruction set, and peripheral interfaces. Existing firmware requires no modification.

Q: What compliance certifications apply to both parts?

A: Both the PIC16LC74AT-04/L and PIC16LC74A-04/L are ROHS3 compliant, REACH unaffected, and carry ECCN EAR99 classification. MSL rating is 3 (168 Hours) for both.

Q: Are there any supply voltage or operating temperature differences?

A: No. Both parts operate across 2.5V to 6V supply range and 0°C to 70°C ambient temperature. Electrical operating parameters are identical.