PIC18F2321-I/ML Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
PIC18F2321-I/ML is an 8-bit PIC18 microcontroller from Microchip with 8 KB flash, 512 bytes RAM, 40 MHz clock, and a 10-channel 10-bit ADC in a compact QFN-28 package. From $2.00 in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- PIC18F2321-I/ML Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.1300(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit PIC18 core at 40 MHz (10 MIPS) delivers efficient processing for control tasks with low active current in QFN-28 package
- 10-channel 10-bit ADC enables multi-sensor data acquisition in a single IC for temperature, pressure, or light-level monitoring
- 8 KB flash and 512 bytes RAM support modest embedded firmware including PID loops and UART/SPI/I2C communication stacks
Applications
PIC18F2321-I/ML is ideal for compact embedded control applications where 8-bit performance and multi-channel analog acquisition are required in a small footprint. It suits sensor data loggers, motor speed controllers, and appliance control boards that need 10-bit ADC accuracy alongside serial communication peripherals. The QFN-28 package (4 mm × 4 mm) fits on dense PCBs in handheld instruments, IoT edge nodes, and consumer electronics with limited board space.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | VQFN-28 |
| Factory Lead Time | 6Weeks |
| YTEOL | 9 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC18 |
| Clock Frequency-Max | 40MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | S-PQCC-N28 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 3 |
| Number of I/O Lines | 25 |
| Number of Serial I/Os | 1 |
| Number of Timers | 6 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC28,.24SQ,25 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, VERY THIN PROFILE, HEAT SINK/SLUG |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 512 |
| ROM (words) | 8192 |
| ROM Programmability | FLASH |
| Screening Level | TS 16949 |
| Speed | 40MHz |
| Supply Current-Max | 23mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.2V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.65mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | 3A991.a.2 |
| HTS Code | 8542.31.00.15 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC18F2321-I/ML:
Frequently Asked Questions
How many analog inputs can PIC18F2321-I/ML sample, and what ADC resolution does it provide?
PIC18F2321-I/ML includes a 10-channel, 10-bit ADC that can sample up to 10 independent analog signals sequentially. The 10-bit resolution provides 1024 distinct levels, giving a step size of approximately 4.9 mV with a 5 V reference, which is sufficient for temperature sensor output, potentiometer position, or battery voltage monitoring in typical embedded control applications.
For a compact motor speed control board, what processing throughput does PIC18F2321-I/ML deliver at 40 MHz?
Running at 40 MHz clock frequency, PIC18F2321-I/ML achieves 10 MIPS of instruction throughput. This is adequate for a simple PWM-based DC motor speed controller that reads a 10-bit ADC, runs a PID algorithm, and updates a PWM duty cycle at a 1 kHz control loop rate, with significant CPU headroom remaining for UART status reporting or I2C sensor polling.
When is PIC18F2321-I/ML a lower-cost alternative to PIC18F4321 for space-constrained designs?
PIC18F2321-I/ML in a 28-pin QFN (4 mm × 4 mm) is preferred over the 44-pin PIC18F4321 when the application needs fewer than 25 I/O pins and must minimize PCB area. Both share the same 8 KB flash, 512-byte RAM, and 40 MHz PIC18 core, so the smaller variant reduces package size and per-unit cost without any software changes or firmware migration effort.
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