PIC16F874AT-I/PT Equivalent & Substitute Parts

Part Overview

The PIC16F874AT-I/PT is an 8-bit microcontroller from Microchip Technology's PIC® 16F series, designed for embedded applications requiring moderate processing capability and integrated peripherals. This device features 7KB of FLASH program memory, 192 bytes of RAM, and 128 bytes of EEPROM, with support for I2C, SPI, and UART/USART connectivity. The part is currently in active production status and is ROHS3 compliant. Equivalent and substitute parts are identified when design requirements change, inventory constraints occur, or when enhanced specifications become necessary for application optimization.

Substiute Parts

PIC16F874AT-I/PT

Microchip TechnologyIn Stock: 10208PIC16F874AT-I/PT Datasheet

Current PartRFQ

PIC16F874A-I/PT

Microchip TechnologyIn Stock: 3202PIC16F874A-I/PT Datasheet

DirectRFQ

PIC16F884-I/PT

Microchip TechnologyIn Stock: 18322PIC16F884-I/PT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PIC16F874AT-I/PT are classified based on electrical and mechanical compatibility within the PIC® 16F microcontroller family. The substitution logic is determined by the following critical parameters:

Core compatibility criteria:

• Core processor type (PIC)
• Core size (8-Bit)
• Package type and pin count (44-TQFP)
• Operating temperature range (-40°C ~ 85°C)
• Program memory type (FLASH)

Identified substitute categories:

Direct Equivalent (PIC16F874A-I/PT): Maintains identical electrical specifications including 7KB program memory, 192 bytes RAM, 128 bytes EEPROM, 33 I/O pins, and 20MHz speed. Differs only in moisture sensitivity level (MSL 1 versus MSL 3) and packaging format (Tray). This part is functionally interchangeable for applications where the original specification is required.

Manufacturer Recommended Substitute (PIC16F884-I/PT): Shares the same package, core processor, speed, and operating temperature range. Enhanced specifications include 35 I/O pins (versus 33), 256 bytes RAM (versus 192), 256 bytes EEPROM (versus 128), and 14-channel A/D converter (versus 8-channel). Supports extended voltage supply range (2V ~ 5.5V versus 4V ~ 5.5V) and internal oscillator capability. This part provides expanded functionality within the same physical footprint.

Parameter Comparison

Engineering Selection Recommendations

PIC16F874A-I/PT Selection: This direct equivalent is appropriate when the original PIC16F874AT-I/PT specification must be maintained and inventory of the exact part number is unavailable. Both parts are active products with identical electrical characteristics and ROHS3 compliance. The primary distinction is moisture sensitivity level (MSL 1 provides unlimited shelf life versus MSL 3 with 168-hour limitation) and packaging format. This substitution requires no design modification.

PIC16F884-I/PT Selection: This manufacturer-recommended substitute is appropriate when design requirements permit enhanced specifications or when the original part is unavailable. The PIC16F884-I/PT provides increased I/O capability (35 versus 33 pins), expanded memory resources (256 bytes RAM and EEPROM versus 192 and 128 bytes), and enhanced analog conversion (14-channel A/D versus 8-channel). The extended voltage supply range (2V ~ 5.5V) and internal oscillator support provide additional design flexibility. All parts maintain identical package geometry, operating temperature range, and compliance certifications. Design validation is required to confirm that the additional I/O pins and enhanced peripherals do not introduce unintended functional changes.

Frequently Asked Questions (FAQ)

Q: Can PIC16F874A-I/PT be used as a direct replacement for PIC16F874AT-I/PT?

A: Yes. Both parts share identical electrical specifications, program memory, RAM, EEPROM, I/O count, and operating parameters. The difference in moisture sensitivity level (MSL 1 versus MSL 3) affects storage conditions but not functional performance. No design changes are required.

Q: What are the key differences between PIC16F874AT-I/PT and PIC16F884-I/PT?

A: The PIC16F884-I/PT provides enhanced specifications: 2 additional I/O pins (35 versus 33), 64 additional bytes of RAM (256 versus 192), 128 additional bytes of EEPROM (256 versus 128), and 6 additional A/D channels (14 versus 8). The PIC16F884-I/PT also supports a lower minimum supply voltage (2V versus 4V) and includes internal oscillator capability. Both maintain the same 44-TQFP package and 20MHz speed.

Q: Is the 44-TQFP package identical across all three parts?

A: Yes. All three parts use the 44-TQFP (10x10) surface mount package with identical pin count and physical dimensions. PCB layout compatibility is maintained across all substitutes.

Q: Are all three parts ROHS3 compliant?

A: Yes. PIC16F874AT-I/PT, PIC16F874A-I/PT, and PIC16F884-I/PT are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute should be selected if the application requires lower supply voltage operation?

A: The PIC16F884-I/PT supports operation down to 2V supply voltage, compared to 4V minimum for the PIC16F874AT-I/PT. If the application requires operation below 4V, the PIC16F884-I/PT is the appropriate selection.

Q: Do the substitute parts require firmware modifications?

A: PIC16F874A-I/PT requires no firmware modifications as it is electrically identical to the original part. PIC16F884-I/PT may require firmware validation if the application utilizes the additional I/O pins or enhanced A/D converter channels. Core instruction set compatibility is maintained across all parts.