PIC16C74AT-10E/L Equivalent & Substitute Parts

Part Overview

The PIC16C74AT-10E/L is an 8-bit microcontroller from Microchip Technology's PIC® 16C series, featuring 7KB OTP program memory, 192 x 8 bytes of RAM, and 33 I/O pins in a 44-PLCC package. The device operates at 10MHz with integrated peripherals including PWM, watchdog timer, brown-out detection, and communication interfaces (I2C, SPI, UART/USART). This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

PIC16C74AT-10E/L

Microchip TechnologyIn Stock: 1134PIC16C74AT-10E/L Datasheet

Current PartRFQ

PIC16C74A-10E/L

Microchip TechnologyIn Stock: 993PIC16C74A-10E/L Datasheet

DirectRFQ

PIC16C74A-10I/L

Microchip TechnologyIn Stock: 2024PIC16C74A-10I/L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PIC16C74AT-10E/L is determined by strict equivalence across the following critical parameters:

• Core Architecture & Memory: Identical PIC core processor, 8-bit configuration, 7KB (4K x 14) OTP program memory, and 192 x 8 RAM
• Speed & Performance: 10MHz operating frequency
• I/O & Connectivity: 33 I/O pins with I2C, SPI, and UART/USART interfaces
• Electrical Specifications: 4V ~ 6V supply voltage range and A/D 8x8b data converter
• Package & Mounting: 44-LCC (J-Lead) surface mount package (16.59x16.59mm)
• Compliance: ROHS3 compliant, REACH unaffected, EAR99 classification

The identified substitutes maintain full electrical and mechanical compatibility with the original part while offering improved product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

PIC16C74A-10E/L is the primary substitute for the PIC16C74AT-10E/L. Both parts share identical electrical specifications, memory configuration, and operating temperature range (-40°C ~ 125°C). The key distinction is product status: PIC16C74A-10E/L is Active, ensuring continued availability and support from Microchip Technology. Both parts maintain ROHS3 compliance and identical packaging specifications.

PIC16C74A-10I/L is a secondary substitute with full electrical and mechanical compatibility. The operating temperature range differs (-40°C ~ 85°C vs. -40°C ~ 125°C), making it suitable for applications not requiring the extended high-temperature performance of the primary part. This variant is also Active status with robust inventory availability (2000 Pcs).

Selection between PIC16C74A-10E/L and PIC16C74A-10I/L depends on application temperature requirements. For designs requiring the full -40°C ~ 125°C operating range, PIC16C74A-10E/L is the appropriate choice. For applications within -40°C ~ 85°C, PIC16C74A-10I/L provides equivalent functionality.

Frequently Asked Questions (FAQ)

Q: Can PIC16C74A-10E/L directly replace PIC16C74AT-10E/L in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters: 8-bit core, 10MHz speed, 7KB OTP memory, 192 x 8 RAM, 33 I/O pins, 4V ~ 6V supply, and 44-LCC package. The primary difference is product status (Active vs. Obsolete).

Q: What is the difference between PIC16C74A-10E/L and PIC16C74A-10I/L?

A: The parts are identical except for operating temperature range. PIC16C74A-10E/L operates from -40°C ~ 125°C, while PIC16C74A-10I/L operates from -40°C ~ 85°C. Select based on your application's temperature requirements.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three parts use the identical 44-LCC (J-Lead) package with 16.59x16.59mm dimensions and surface mount configuration. No PCB redesign is required for substitution.

Q: Do these substitutes maintain the same firmware compatibility?

A: Firmware compatibility is determined by the PIC core architecture and memory configuration, which are identical across all three parts. Existing firmware for PIC16C74AT-10E/L will execute on both PIC16C74A variants without modification.

Q: What is the inventory status for substitute parts?

A: PIC16C74A-10E/L has 972 Pcs in stock. PIC16C74A-10I/L has 2000 Pcs in stock. Both are Active products with ongoing availability from Microchip Technology.