PIC18F4321-I/PAlternatives & Equivalent Parts
About PIC18F4321-I/P
PIC18F4321-I/P is a Integrated Circuit component manufactured by Microchip. It comes in a Dual-In-Line Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Specification Comparison
| Parameter | PIC18F4321-I/PSource | PIC18LF4321-I/P | PIC18F4321-I/PT | PIC18F4331-I/P | PIC18F4221-I/P | PIC18F4320-I/P | PIC18F4423-I/P | PIC18F4431-I/P | PIC18F4220-I/P | PIC18F4520-I/P | PIC18F4221-I/PT |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip | Microchip |
| Package Type | Dual-In-Line Packages | Dual-In-Line Packages | Quad Flat Packages | Dual-In-Line Packages | Dual-In-Line Packages | Dual-In-Line Packages | Dual-In-Line Packages | Dual-In-Line Packages | Dual-In-Line Packages | Dual-In-Line Packages | Quad Flat Packages |
| Pin Count | 40 | 40 | 44 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 44 |
| Temperature Range | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C | -40.0°C ~ 85.0°C |
| Price | $3.4200 | $3.7800 | $3.1800 | $5.0600 | $1.0300 | $3.0700 | $4.7700 | $5.2900 | $6.4700 | $6.2349 | $3.0000 |
| Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
| Electrical Parameters | |||||||||||
| Pbfree Code | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Manufacturer Package Code | PDIP-40 | PDIP-40 | TQFP-44 | PDIP-40 | PDIP-40 | PDIP-40 | PDIP-40 | PDIP-40 | PDIP-40 | PDIP-40 | TQFP-44 |
| Factory Lead Time | 6 Weeks | 6 Weeks | 6 Weeks | 6 Weeks | 5 Weeks | 6 Weeks | 6 Weeks | 6 Weeks | 6 Weeks | 6 Weeks | 6 Weeks |
| YTEOL | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 8 | 9 | 9 | 9 |
| Has ADC | YES | YES | YES | YES | YES | YES | YES | YES | YES | YES | YES |
| Bit Size | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Boundary Scan | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO |
| CPU Family | PIC18 | PIC18 | PIC18 | PIC18 | PIC18 | PIC18 | PIC18 | PIC18 | PIC18 | PIC18 | PIC18 |
| Clock Frequency-Max | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| DAC Channels | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO |
| DMA Channels | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO |
| Format | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT | FIXED POINT |
| Integrated Cache | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO | NO |
| JESD-30 Code | R-PDIP-T40 | R-PDIP-T40 | S-PQFP-G44 | R-PDIP-T40 | R-PDIP-T40 | R-PDIP-T40 | R-PDIP-T40 | R-PDIP-T40 | R-PDIP-T40 | R-PDIP-T40 | S-PQFP-G44 |
| JESD-609 Code | e3 | e3 | e3 | e3 | e3 | e3 | e3 | e3 | e3 | e3 | e3 |
| Low Power Mode | YES | YES | YES | YES | YES | YES | NO | YES | YES | YES | YES |
| Number of External Interrupts | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Number of I/O Lines | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 |
| Number of Serial I/Os | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Number of Timers | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 6 | 6 | 4 | 6 |
| On Chip Program ROM Width | 8 | 16 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| PWM Channels | YES | YES | YES | YES | YES | YES | YES | YES | YES | YES | YES |
| Package Body Material | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY | PLASTIC/EPOXY |
| Package Equivalence Code | DIP40,.6 | DIP40,.6 | TQFP44,.39SQ,31 | DIP40,.6 | DIP40,.6 | DIP40,.6 | DIP40,.6 | DIP40,.6 | DIP40,.6 | DIP40,.6 | TQFP44,.39SQ,31 |
| Package Shape | RECTANGULAR | RECTANGULAR | SQUARE | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | RECTANGULAR | SQUARE |
| Package Style | IN-LINE | IN-LINE | FLATPACK, THIN PROFILE | IN-LINE | IN-LINE | IN-LINE | IN-LINE | IN-LINE | IN-LINE | IN-LINE | FLATPACK, THIN PROFILE |
| Qualification Status | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified | Not Qualified |
| RAM (bytes) | 512 | 512 | 512 | 768 | 512 | 512 | 768 | 768 | 512 | 1536 | 512 |
| ROM (words) | 8192 | 4096 | 8192 | 8192 | 4096 | 8192 | 16384 | 16384 | 4096 | 32768 | 4096 |
| ROM Programmability | FLASH | FLASH | FLASH | FLASH | FLASH | FLASH | FLASH | FLASH | FLASH | FLASH | FLASH |
| Screening Level | TS 16949 | TS 16949 | TS 16949 | TS 16949 | TS 16949 | TS 16949 | TS 16949 | TS 16949 | TS 16949 | — | TS 16949 |
| Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Supply Current-Max | 23 mA | 23 mA | 23 mA | 15 mA | 23 mA | 15 mA | 250 mA | 15 mA | 15 mA | 3.5 mA | 23 mA |
| Supply Voltage-Max | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage-Min | 4.2 V | 2 V | 4.2 V | 4.2 V | 4.2 V | 4.2 V | 4.2 V | 4.2 V | 4.2 V | 5 V | 4.2 V |
| Supply Voltage-Nom | 5 V | 3 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Surface Mount | NO | NO | YES | NO | NO | NO | NO | NO | NO | NO | YES |
| Technology | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS | CMOS |
| Temperature Grade | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE | THROUGH-HOLE | GULL WING | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | THROUGH-HOLE | GULL WING |
| Terminal Pitch | 2.54 mm | 2.54 mm | 0.8 mm | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm | 0.8 mm |
| Terminal Position | DUAL | DUAL | QUAD | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL | DUAL | QUAD |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC | MICROCONTROLLER, RISC |
| Additional Feature | — | ALSO OPERATES AT 2V MINIMUM SUPPLY AT 4 MHZ | — | — | — | OPERATES AT 2 V MINIMUM SUPPLY AT 4 MHz | ALSO OPERATES AT 2V MIN SUPPLY @ 4MHZ | — | OPERATES AT 2 V MINIMUM SUPPLY AT 4 MHz | — | — |
| Peak Reflow Temperature (Cel) | — | — | 260 | — | — | — | — | — | — | — | 260 |
| Time@Peak Reflow Temperature-Max (s) | — | — | 40 | — | — | — | — | — | — | — | 40 |
| On Chip Data RAM Width | — | — | — | 8 | — | 8 | — | 8 | 8 | 8 | — |
| ## PIC18F4520-I/P Alternates Showing results | — | — | — | — | — | — | — | — | — | Image | — |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 10 alternatives for PIC18F4321-I/P — response within 24 hours.
Quick Links
Microchip Technology Inc 40LD 160K, POWER-MANAGED PIC WITH 8 KBYTES
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDIP40
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDIP40
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDIP40
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PQFP44
Why Look for Alternatives?
Finding alternatives for PIC18F4321-I/P is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating PIC18F4321-I/P replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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FAQ
What is equivalent to PIC18F4321-I/P?
Known equivalents for PIC18F4321-I/P include PIC18LF4321-I/P, PIC18F4321-I/PT, PIC18F4331-I/P. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of PIC18F4321-I/P?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify PIC18F4321-I/P alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.