PIC17C43-33I/L Equivalent & Substitute Parts

Part Overview

The PIC17C43-33I/L is an 8-bit microcontroller from Microchip Technology's PIC® 17C series, featuring 8KB OTP program memory, 33MHz operation, and 44-PLCC packaging. This device is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent functional specifications and electrical parameters align with application requirements, enabling component interchangeability in compatible system designs.

Substiute Parts

PIC17C43-33I/L

Microchip TechnologyIn Stock: 1155PIC17C43-33I/L Datasheet

Current PartRFQ

PIC18F4320-I/ML

Microchip TechnologyIn Stock: 2217PIC18F4320-I/ML Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC17C43-33I/L is determined by the following critical parameters:

• Core Processor Architecture: PIC family compatibility
• Core Size: 8-Bit processing capability
• Program Memory Capacity: Minimum 8KB (4K x 16) requirement
• I/O Pin Count: Minimum 33 I/O lines
• Voltage Supply Range: Overlap with 4.5V ~ 6V specification
• Operating Temperature Range: -40°C ~ 85°C compatibility
• Mounting Type: Surface Mount requirement
• Compliance: RoHS3 and REACH compliance status

The PIC18F4320-I/ML qualifies as a substitute based on matching core processor family, 8-bit architecture, equivalent program memory size, sufficient I/O count, compatible voltage and temperature ranges, surface mount packaging, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the PIC17C43-33I/L and PIC18F4320-I/ML maintain Active product status from Microchip Technology, ensuring continued availability and support. Both devices carry ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component manufacturing and distribution.

The PIC18F4320-I/ML offers enhanced specifications including FLASH program memory (versus OTP), higher clock speed (40MHz versus 33MHz), increased I/O count (36 versus 33), and larger RAM capacity (512 x 8 versus 454 x 8). The substitute device operates within a slightly narrower voltage range (4.2V ~ 5.5V versus 4.5V ~ 6V) and uses QFN packaging (8x8mm) instead of PLCC packaging (16.59x16.59mm).

Selection between these devices depends on application-specific requirements regarding program memory reprogrammability, clock speed requirements, I/O availability, and PCB layout constraints imposed by package geometry differences.

Frequently Asked Questions (FAQ)

Q: Can the PIC18F4320-I/ML directly replace the PIC17C43-33I/L in existing designs?

A: Direct replacement requires verification of three factors: (1) PCB footprint compatibility—the PLCC and QFN packages have different land patterns and require layout modifications; (2) voltage supply range overlap—designs operating above 5.5V require circuit adjustment; (3) program memory type—OTP versus FLASH affects firmware deployment methodology.

Q: What are the key differences between OTP and FLASH program memory?

A: OTP (One-Time Programmable) memory is programmed once during manufacturing and cannot be erased. FLASH memory is electrically erasable and reprogrammable, enabling field updates and development flexibility. This distinction affects manufacturing processes, development cycles, and field service capabilities.

Q: How do package differences affect substitution feasibility?

A: The PIC17C43-33I/L uses 44-PLCC packaging (16.59x16.59mm footprint), while the PIC18F4320-I/ML uses 44-QFN packaging (8x8mm footprint). These packages have different land patterns, via requirements, and thermal characteristics. PCB redesign is necessary for physical substitution.

Q: Are the I/O pin assignments identical between these devices?

A: Both devices provide 33+ I/O lines, but pin-to-function mapping differs between PIC 17C and PIC 18F series. Firmware and hardware interface verification is required to confirm functional compatibility.

Q: What compliance certifications apply to both devices?

A: Both the PIC17C43-33I/L and PIC18F4320-I/ML are ROHS3 compliant and REACH Unaffected, meeting current environmental and hazardous substance regulations for electronic components.