PIC18F4321T-I/ML - 8KB Flash 8-bit MCU 40MHz QFN-44 | Microchip
MPN: PIC18F4321T-I/ML ✓ فعالPIC18F4321T-I/ML جائزہ
An 8-bit microcontroller (MCU) is a programmable integrated circuit that executes instructions from on-chip program memory while interacting with peripherals through digital and analog I/O pins. The PIC18F family sits above PIC16 in Microchip's 8-bit hierarchy, offering enhanced peripherals and nanoWatt power management. Architecturally, an 8-bit MCU typically includes a CPU core, Flash program memory, SRAM for data, EEPROM for non-volatile storage, timers, ADC, communication peripherals, and GPIO. PIC18F devices extend the baseline PIC16 instruction set with 16-bit instructions and a hardware multiplier for C-friendly code generation.
The PIC18F4321 features 36 digital I/O pins, a 10-bit ADC with multiple channels, multiple capture/compare/PWM modules, USART, MSSP (I2C/SPI), and nanoWatt Technology power management for sleep/idle modes. The 44-pin VQFN exposed-pad package provides a compact footprint and a thermal dissipation path for the silicon die through the EP.
This microcontroller is well suited for industrial control nodes, sensor signal conditioning, motor control, low-power battery devices, and consumer appliances where the PIC18 ecosystem of MPLAB X, XC8 compiler, and a broad library of code examples reduces time-to-market. The device is also a strong candidate for legacy PIC18F4321 designs migrating from PDIP to a smaller QFN footprint.
In designs, ensure the exposed pad is soldered to a sufficient copper pour for thermal dissipation, and follow Microchip's QFN land-pattern guidelines. The ICSP programming pins must remain accessible for in-circuit programming and debugging.
کے لیے ڈراپ اِن متبادل PIC18F4321T-I/ML — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC18F4321T-I/ML (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف ADC, Package, I/O Pins, Maximum CPU Speed, Operating Temperature.
PIC18F4321-I/ML
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC18F4321T-I/ML زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Family | PIC18F |
| Core | 8-bit PIC |
| Program Memory Type | Flash |
| Program Memory Size | 8 KB (4K x 16) |
| RAM Size | 512 bytes |
| EEPROM Size | 256 bytes |
| Maximum CPU Speed | 40 MHz |
| Performance | 10 MIPS |
| Instruction Execution Time | 100 ns (at 40 MHz) |
| Number of I/O Pins | 36 |
| Supply Voltage Range | 2.0 V to 5.5 V |
| ADC | 10-bit |
| آپریٹنگ درجہ حرارت رینج | -40 C to +85 C (Industrial) |
| پیکیج | 44-pin VQFN (8x8 mm) with exposed pad |
| ماؤنٹنگ ٹائپ | Surface Mount |
| RoHS اسٹیٹس | Compliant |
PIC18F4321T-I/ML پن کنفیگریشن
| پن 1 | NC — Not connected |
| پن 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| پن 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| پن 4 | RA2/AN2/VREF- — Digital I/O / Analog input channel 2 / ADC VREF- |
| پن 5 | RA3/AN3/VREF+ — Digital I/O / Analog input channel 3 / ADC VREF+ |
| پن 6 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| پن 7 | RA5/AN4/SS — Digital I/O / Analog input channel 4 / SPI slave select |
| پن 8 | OSC1/CLKI/RA7 — Oscillator input / External clock / Digital I/O |
| پن 9 | OSC2/CLKO/RA6 — Oscillator output / Clock out / Digital I/O |
| پن 10 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / clock input |
| پن 11 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 |
| پن 12 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| پن 13 | RC3/SCK/SCL — Digital I/O / SPI clock / I2C clock |
| پن 14 | RC4/SDI/SDA — Digital I/O / SPI data in / I2C data |
| پن 15 | RC5/SDO — Digital I/O / SPI data out |
| پن 16 | RC6/TX/CK — Digital I/O / USART TX / clock |
| پن 17 | RC7/RX/DT — Digital I/O / USART RX / data |
| پن 18 | VSS — Ground reference |
| پن 19 | VDD — Positive supply voltage 2.0V to 5.5V |
| پن 20 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM fault |
| پن 21 | RB1/INT1 — Digital I/O / External interrupt 1 |
| پن 22 | RB2/INT2 — Digital I/O / External interrupt 2 |
| پن 23 | RB3/INT3/CCP2 — Digital I/O / External interrupt 3 / CCP2 |
| پن 24 | RB4/KBI0 — Digital I/O / Keyboard interrupt 0 |
| پن 25 | RB5/KBI1 — Digital I/O / Keyboard interrupt 1 |
| پن 26 | RB6/KBI2/PGC — Digital I/O / Keyboard interrupt 2 / ICSP clock |
| پن 27 | RB7/KBI3/PGD — Digital I/O / Keyboard interrupt 3 / ICSP data |
| پن 28 | MCLR/VPP/RE3 — Master clear reset / Programming voltage / Digital I/O |
| پن 29 | RD0 — Digital I/O |
| پن 30 | RD1 — Digital I/O |
| پن 31 | RD2 — Digital I/O |
| پن 32 | RD3 — Digital I/O |
| پن 33 | RD4 — Digital I/O |
| پن 34 | RD5 — Digital I/O |
| پن 35 | RD6 — Digital I/O |
| پن 36 | RD7 — Digital I/O |
| پن 37 | VSS — Ground reference |
| پن 38 | VDD — Positive supply voltage |
| پن 39 | RE0/RD — Digital I/O |
| پن 40 | RE1/WR — Digital I/O |
| پن 41 | RE2/CS — Digital I/O |
| پن 42 | AVDD — Analog supply voltage |
| پن 43 | AVSS — Analog ground reference |
| پن 44 | EP — Exposed pad - thermal dissipation, solder to ground plane |
عام استعمالات
PIC18F4321T-I/ML کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Sensor Interface Node, Battery-Powered Remote Control / IoT Edge Node, Consumer Appliance Control Board, Automotive Aftermarket Accessory (Non-Safety), Educational and Maker Embedded Platform, Motor Drive and PWM Control.
Industrial Sensor Interface Node
The PIC18F4321T-I/ML fits industrial sensor nodes because of its 36 digital I/O pins, 10-bit ADC, and nanoWatt Technology sleep modes. Place the QFN on a board with a copper pour tied to the exposed pad to dissipate heat from the industrial -40C to +85C operating range; the 10 MIPS CPU can sample multiple analog sensors and run a Modbus RTU stack over the USART. Compared with discrete op-amp + ADC chains, this MCU integrates all conversion and signal conditioning in a single 8x8 mm package.
تجویز کردہ
Battery-Powered Remote Control / IoT Edge Node
The PIC18F4321T-I/ML's nanoWatt Technology enables Sleep currents in the microampere range, allowing battery-powered IoT edge nodes to run for years on a single coin cell. The 8KB Flash comfortably fits MQTT-SN, BLE beacon drivers, or LoRaWAN stack fragments; the 512B RAM supports small buffers. Operating from 2.0V to 5.5V, it accepts direct battery input without an LDO. Designers should exploit the MSSP (I2C/SPI) ports to attach sensors and the USART for host-side debug.
تجویز کردہ
Consumer Appliance Control Board
The PIC18F4321T-I/ML integrates 36 I/O lines plus USART and MSSP, making it suitable for white-goods, HVAC, and kitchen-appliance control boards. The 8KB Flash stores the appliance state machine and user-interface firmware; the 256B EEPROM retains settings across power cycles. Its 40 MHz / 10 MIPS throughput handles triac-zero-crossing control, keypad scanning, and sensor fusion in real time, while the 5V operation directly drives relay and triac interfaces.
تجویز کردہ
Automotive Aftermarket Accessory (Non-Safety)
The PIC18F4321T-I/ML's industrial -40C to +85C range covers cabin and non-safety automotive accessory conditions. The 36 I/O lines and 10-bit ADC support dashboard lighting controllers, mirror controllers, and body-electronics accessories; the MSSP interfaces with SPI/I2C peripherals. Note that AEC-Q100 is not qualified, so it cannot replace safety-critical components, but it is fully appropriate for non-safety accessories.
تجویز کردہ
Educational and Maker Embedded Platform
The PIC18F4321T-I/ML is popular in academic labs and maker projects because of the free MPLAB X IDE, XC8 compiler, and PICkit programmer support. With 36 I/O lines, students can drive LEDs, character LCDs, servo motors, and UART peripherals from a single chip. The 44-pin QFN footprint teaches surface-mount soldering skills, while ICSP enables in-circuit debugging and step-through learning.
تجویز کردہ
Motor Drive and PWM Control
The PIC18F4321T-I/ML's Capture/Compare/PWM (CCP) modules and enhanced 16-bit timers generate precise PWM signals for DC motor speed control and brushless-DC commutation. The 10 MIPS throughput executes field-oriented control loops at modest RPMs, and the 36 I/O lines drive gate-driver enable signals. The industrial -40C to +85C temperature range supports enclosed motor housings; pair the QFN exposed pad with a copper pour for thermal relief.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC18F4321T-I/ML — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC18F4321-I/ML | PIC18F4320T-I/PT | PIC18F4320-I/PT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin VQFN (8x8) with EP | 44-pin VQFN (8x8) with EP | 44-pin TQFP | 44-pin TQFP |
| Program Memory | 8 KB Flash | 8 KB Flash | 8 KB Flash | 8 KB Flash |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| Maximum CPU Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Number of I/O Pins | 36 | 36 | 36 | 36 |
| Supply Voltage Range | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C |
| Packaging Media | Tape & Reel | Tray | Tape & Reel | Tray |
اہم امتیازی خصوصیات
- Industrial -40C to +85C temperature range in compact QFN-44 (بمقابلہPIC18F4320T-I/PT)
- Same die and pinout, tape-and-reel packaging optimized for high-volume assembly (بمقابلہPIC18F4321-I/ML)
- Established PIC18 ecosystem with 8KB Flash and nanoWatt technology (بمقابلہPIC18F4221T-I/ML)
ڈیزائن نوٹس
The PIC18F4321T-I/ML's 44-pin VQFN exposed pad must be soldered to a copper pour for both electrical ground and thermal dissipation. At 40 MHz worst-case operation in industrial temperature, the device stays within junction ratings with a 1-2 square inch copper pour. For high ambient temperature environments, increase the pour area or add thermal vias to inner planes.
Use Microchip's recommended QFN-44 land pattern. Keep digital traces short, place decoupling capacitors (100 nF + 10 uF) within 5 mm of each VDD pin, and route the AVSS/AVDD pair separately from digital VDD/VSS to minimize ADC noise coupling. The exposed pad should connect to the ground plane through at least 4 thermal vias.
Route the ICSP PGC/PGD lines away from switching nodes and noisy power traces to ensure reliable in-circuit programming. Place an RC filter on MCLR if the system has long MCLR traces. Group the USART TX/RX differential-style routing together, and isolate the analog AVSS/AVDD pins from noisy digital traces to preserve ADC accuracy.
Do not exceed 5.5V on any VDD or digital I/O pin; the PIC18F4321 is not 5V-tolerant when powered at 3.3V. Always honor the brown-out-reset voltage settings in CONFIG to ensure clean reset behavior. The ADC's acquisition time depends on the source impedance - add a buffer for high-impedance sensors.
تعمیل کی معلومات
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C; not AEC-Q100 qualified for automotive safety applications. Lead-free (Pb-free) reflow profile per Microchip datasheet.
