PIC16F874-04I/PT Equivalent & Substitute Parts

Part Overview

The PIC16F874-04I/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 operates at 4MHz with 7KB of FLASH program memory and is housed in a 44-TQFP surface mount package. The part is currently active in production with verified programmability through DiGi-Electronics. Equivalent and substitute parts are identified when design requirements change, inventory constraints occur, or performance specifications need adjustment while maintaining functional compatibility within the 44-TQFP package footprint.

Substiute Parts

PIC16F874-04I/PT

Microchip TechnologyIn Stock: 2374PIC16F874-04I/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 PIC16F874-04I/PT are qualified based on the following criteria:

Package Compatibility: All substitute parts must use the 44-TQFP (10x10) surface mount package to ensure direct PCB footprint compatibility without layout modifications.

Core Architecture: All parts must be 8-bit PIC microcontrollers from the PIC® 16F series to maintain instruction set compatibility and peripheral integration patterns.

Memory Configuration: Program memory must be 7KB (4K x 14) FLASH to preserve code capacity for existing firmware implementations.

Connectivity & Peripherals: I2C, SPI, and UART/USART interfaces, along with Brown-out Detect/Reset, POR, PWM, and WDT functionality, must be present to support existing circuit designs.

Operating Temperature Range: All substitutes must support -40°C ~ 85°C operation to maintain thermal performance specifications.

Compliance: RoHS3 compliance and REACH unaffected status are required for regulatory alignment.

Speed, voltage supply range, I/O count, EEPROM size, RAM size, and data converter specifications may vary between the main part and substitutes, provided the application design accommodates these differences.

Parameter Comparison

Engineering Selection Recommendations

PIC16F874A-I/PT is a direct equivalent substitute offering identical memory configuration and I/O count with improved speed capability at 20MHz. This part maintains the same voltage supply range and peripheral set. The lower MSL rating (1 vs. 3) provides extended shelf life and reduced moisture-related handling constraints. Selection of this part is appropriate when higher processing speed is beneficial and storage conditions require extended moisture protection.

PIC16F884-I/PT is a manufacturer-recommended substitute with enhanced specifications including expanded EEPROM (256 x 8 vs. 128 x 8), increased RAM (256 x 8 vs. 192 x 8), additional I/O pins (35 vs. 33), and increased analog input channels (14 vs. 8). This part operates at 20MHz with an internal oscillator option and supports a lower minimum supply voltage of 2V. Selection of this part is appropriate when applications require expanded memory resources, additional I/O capability, or lower voltage operation. All three parts maintain Active product status and full RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can PIC16F874A-I/PT be used as a direct replacement for PIC16F874-04I/PT?

A: Yes. Both parts share identical program memory (7KB), EEPROM (128 x 8), RAM (192 x 8), I/O count (33), and peripheral configuration. The primary difference is operating speed: PIC16F874A-I/PT runs at 20MHz versus 4MHz. If the application firmware does not require the higher speed and the circuit design accommodates the faster clock, this substitution is valid. Verify that timing-critical operations do not depend on the original 4MHz specification.

Q: What are the key differences between PIC16F874-04I/PT and PIC16F884-I/PT?

A: The PIC16F884-I/PT offers expanded resources: 256 x 8 EEPROM (vs. 128 x 8), 256 x 8 RAM (vs. 192 x 8), 35 I/O pins (vs. 33), and 14 analog input channels (vs. 8). It operates at 20MHz with internal oscillator support and accepts 2V ~ 5.5V supply voltage (vs. 4V ~ 5.5V). Both maintain the 44-TQFP package and identical program memory size. Use PIC16F884-I/PT when applications require additional memory, I/O, or analog channels.

Q: Are all three parts compatible with the same 44-TQFP PCB footprint?

A: Yes. All three parts use the 44-TQFP (10x10) surface mount package with identical pin count and footprint dimensions. PCB layout modifications are not required for substitution.

Q: What is the impact of MSL rating differences?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption limits during storage. PIC16F874A-I/PT has MSL 1 (unlimited shelf life), while PIC16F874-04I/PT and PIC16F884-I/PT have MSL 3 (168-hour limit). MSL 1 parts tolerate longer storage periods without baking before reflow soldering. For high-volume or long-term inventory applications, MSL 1 parts reduce moisture-related defect risk.

Q: Can firmware written for PIC16F874-04I/PT run on PIC16F874A-I/PT or PIC16F884-I/PT without modification?

A: Firmware compatibility depends on application-specific timing and resource requirements. Both substitute parts support the same instruction set and peripheral interfaces. However, code relying on specific clock frequency timing or memory constraints may require adjustment. PIC16F884-I/PT has expanded memory and I/O, which does not affect existing code but enables additional functionality if needed.

Q: Which substitute part should be selected for new designs?

A: Selection depends on application requirements. For designs requiring only the original specifications, PIC16F874A-I/PT provides improved speed and better moisture protection. For designs benefiting from expanded memory, additional I/O, or lower voltage operation, PIC16F884-I/PT is the appropriate choice. All three parts maintain Active status and full regulatory compliance.