PIC18F4320-E/PT - 8KB Flash MCU 40MHz 36 I/O TQFP-44 | Microchip
MPN: PIC18F4320-E/PT ✓ فعالPIC18F4320-E/PT نمای کلی
What is a PIC18 Flash microcontroller? PIC18F-series devices are 8-bit CMOS RISC microcontrollers from Microchip Technology built around an enhanced Harvard architecture with separate program and data buses. They sit in the broader taxonomy microcontroller -> embedded processor -> semiconductor IC, and are widely adopted in cost-sensitive embedded designs because of their deterministic instruction timing, low power nanoWatt Technology, and rich peripheral integration.
Key features include 13 channels of 10-bit Analog-to-Digital conversion, two analog comparators, two Capture/Compare/PWM modules, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, an Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), and an in-circuit debugger (ICD) interface. Operating voltage spans 4.2 V to 5.5 V across the extended -40C to +125C industrial temperature range, suitable for industrial and automotive-grade environments.
The architecture combines a 16-bit instruction word with an 8-bit data path, providing 77 single-word instructions and C-compiler-friendly addressing modes. Self-programming capability enables field firmware updates, while the ICD interface simplifies in-system debug. nanoWatt Technology provides ultra-low-power sleep modes (<100 nA typical) for battery-backed designs.
Typical applications include industrial control systems, HVAC sensor interfaces, automotive body controllers, consumer appliance controllers, and USB-to-serial bridges when paired with the PIC18F2550/4550 family. The 36 I/O lines comfortably drive keypad scanning, character LCDs, and multi-drop RS-485 nodes.
When designing with the PIC18F4320-E/PT, ensure the 5 V rail is regulated within 4.2 V to 5.5 V to prevent Flash programming failures, place decoupling capacitors within 5 mm of each VDD/VSS pair, and use Microchip's MPLAB X IDE with MPLAB XC8 compiler for firmware development.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design guidance compiled from the Microchip datasheet, DigiKey inventory, and Mouser listings as of 2026-09-27.
جایگزین‌های drop-in برای PIC18F4320-E/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18F4320-E/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Program Memory (Flash), ADC, Core, Mounting Type.
PIC18F4320-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4320-E/P
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4520-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F46K80-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4420-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F2580-I/SP
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4320-E/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Family | PIC18Fxxxx |
| Core | 8-bit PIC RISC (Harvard) |
| Program Memory (Flash) | 8 KB |
| SRAM | 512 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, 13 channels |
| Comparators | 2 |
| CCP Modules | 2 |
| Serial Interfaces | SPI / I2C (MSSP), EUSART |
| بسته‌بندی | 44-pin TQFP (PT), 10x10 mm |
| محدوده دمای کاری | -40C to +125C (Extended, -E suffix) |
| In-Circuit Debug | Yes (ICD) |
| Self-Programming | Yes |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC18F4320-E/PT
| پین 1 | RA2/AN2/VREF- — PORTA bit 2 / ADC input 2 / negative voltage reference |
| پین 2 | RA3/AN3/VREF+ — PORTA bit 3 / ADC input 3 / positive voltage reference |
| پین 3 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / Comparator 1 output |
| پین 4 | RA5/AN4/SS/LVDIN — PORTA bit 5 / ADC input 4 / SPI slave select / LVD input |
| پین 5 | RE0/RD/AN5 — PORTE bit 0 / read control / ADC input 5 |
| پین 6 | RE1/WR/AN6 — PORTE bit 1 / write control / ADC input 6 |
| پین 7 | RE2/CS/AN7 — PORTE bit 2 / chip select / ADC input 7 |
| پین 8 | VDD — Positive supply voltage |
| پین 9 | VSS — Ground |
| پین 10 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 / PWM fault input |
| پین 11 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| پین 12 | RB2/INT2/CANTX — PORTB bit 2 / external interrupt 2 (CAN TX on F2480/F2580) |
| پین 13 | RB3/INT3/CANRX — PORTB bit 3 / external interrupt 3 (CAN RX on F2480/F2580) |
| پین 14 | RB4/KBI0 — PORTB bit 4 / keyboard interrupt 0 |
| پین 15 | RB5/KBI1/PGM — PORTB bit 5 / keyboard interrupt 1 / LVP programming |
| پین 16 | RB6/KBI2/PGC — PORTB bit 6 / keyboard interrupt 2 / ICSP clock |
| پین 17 | RB7/KBI3/PGD — PORTB bit 7 / keyboard interrupt 3 / ICSP data |
| پین 18 | VSS — Ground |
| پین 19 | VDD — Positive supply voltage |
| پین 20 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| پین 21 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| پین 22 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| پین 23 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پین 24 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پین 25 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 26 | RC6/TX/CK — PORTC bit 6 / EUSART transmit / clock |
| پین 27 | RC7/RX/DT — PORTC bit 7 / EUSART receive / data |
| پین 28 | VSS — Ground |
| پین 29 | VDD — Positive supply voltage |
| پین 30 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock in / PORTA bit 7 |
| پین 31 | OSC2/CLKO/RA6 — Crystal oscillator output / clock out / PORTA bit 6 |
| پین 32 | VSS — Ground |
| پین 33 | VDD — Positive supply voltage |
| پین 34 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| پین 35 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| پین 36 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| پین 37 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| پین 38 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| پین 39 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| پین 40 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| پین 41 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| پین 42 | VSS — Ground |
| پین 43 | VDD — Positive supply voltage |
| پین 44 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| پین 45 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
کاربردهای معمول
PIC18F4320-E/PT مناسب است برای 6 کاربردs: Industrial Control and Sensor Hub, HVAC Climate Controller, Automotive Body Electronics, Consumer Appliance Control Board, USB-to-Serial Bridge Dongle, Battery-Powered Sensor Node.
Industrial Control and Sensor Hub
The PIC18F4320-E/PT fits industrial sensor-hub controllers by integrating 13 channels of 10-bit ADC and 36 I/O lines into a 44-pin TQFP, eliminating external multiplexer ICs. Its 40 MHz core executes deterministic control loops with 100 ns instruction timing, while the extended -40C to +125C temperature range tolerates factory-floor thermal stress. Used with a 4.2-5.5 V regulated supply, the MCU scans thermocouples, RTDs, and 4-20 mA current loops at 10 ksps aggregate rate, communicating results via the EUSART to a PLC over RS-485.
پیشنهادی
HVAC Climate Controller
The PIC18F4320-E/PT is well suited for HVAC wall thermostats and zone controllers where its 10-bit ADC reads thermistor temperature sensors and two analog comparators detect over-temperature conditions without a separate supervisor IC. Two CCP PWM modules drive variable-speed blower fans, while nanoWatt Technology sleep currents below 100 nA extend battery life in wireless models. The 8 KB Flash holds scheduling logic for 7-day programmable setpoints and firmware upgrade over UART.
پیشنهادی
Automotive Body Electronics
In automotive body controllers the PIC18F4320-E/PT's extended -40C to +125C operating range handles under-hood thermal cycles per AEC-Q100 stress profiles, though formal AEC-grade qualification requires the PIC18F46K80-I/PT variant. Its EUSART drives LIN-bus master nodes via a TJA1027 transceiver, while CCP PWMs dim interior lighting and run window lift motors. 8 KB Flash stores door-zone state machine logic for lock/unlock sequencing with 256-byte EEPROM retaining user preferences through battery disconnect.
پیشنهادی
Consumer Appliance Control Board
Washing machines, microwaves, and induction cooktops use the PIC18F4320-E/PT to drive user-keypad scanning, character-LCD displays, and triac-fired heater elements. The MSSP peripheral runs an SPI master bus to digital potentiometers that adjust cooking-power profiles, while the EUSART communicates with the inverter board via opto-isolated RS-485. Mechanical endurance of appliance relays is monitored via interrupts on RB0-RB3, with 256-byte EEPROM logging fault codes for service diagnostics.
پیشنهادی
USB-to-Serial Bridge Dongle
Though the PIC18F4320-E/PT itself lacks a USB peripheral, it pairs with the PIC18F2550 or PIC18F4550 in companion dongles to provide isolated serial translation between legacy RS-232 equipment and USB hosts. The PIC18F4320-E/PT then interprets the UART stream, performs protocol conversion, and forwards commands to downstream motor or sensor nodes, leveraging its 40 MHz throughput and 36 I/O lines as a flexible bridge SoC.
پیشنهادی
Battery-Powered Sensor Node
The PIC18F4320-E/PT with nanoWatt Technology supports <100 nA sleep current and 1.8 microA RTCC operation, enabling multi-year battery life on a 2xAA cell pack in remote sensor telemetry nodes. The internal EEPROM stores calibration coefficients, while the MSSP wakes the host sensor over I2C to take measurements at scheduled intervals. The EUSART transmits aggregated data bursts via a low-power sub-GHz radio module, then returns to sleep between samples.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F4320-E/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F4320-I/PT | PIC18F4520-I/PT | PIC18F46K80-I/PT | PIC18F4420-I/PT | PIC18F2580-I/SP |
|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same | TQFP-44 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 32 KB | 64 KB | 16 KB | 32 KB |
| SRAM | 512 bytes | 512 bytes | 1536 bytes | 3.6 KB | 768 bytes | 1.5 KB |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 1 KB | 256 bytes | 256 bytes |
| ADC Channels | 13 | 13 | 13 | 11 (12-bit) | 13 | 8 |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| CAN Peripheral | No | No | No | Yes (CAN) | No | Yes (CAN) |
تفاوت‌های کلیدی
- Extended temperature grade to +125C (در مقابلPIC18F4320-I/PT)
- Code-compatible upgrade path to 32 KB Flash (در مقابلPIC18F4520-I/PT)
- CAN-bus enabled variant available in same footprint (در مقابلPIC18F2580-I/SP)
یادداشت‌های طراحی
The PIC18F4320-E/PT requires a regulated 4.2 V to 5.5 V supply. Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pin pair (pins 8/9, 18/19, 28/29, 32/33, 42/43). Add a bulk 10 uF tantalum or aluminum-polymer capacitor near the IC to handle ADC reference load transients during conversion bursts. Brown-out reset should be programmed to ensure Flash programming integrity.
Estimated: a 2-layer FR4 board with a continuous ground plane directly beneath the TQFP-44 footprint provides adequate thermal dissipation and reduces EMI emission from the 40 MHz oscillator. For TQFP packages, route all signal traces on the top layer and stitch 4 vias around the exposed paddle substitute area at 0.8 mm pitch, matching JEDEC MS-026 land pattern recommendations. The ICD PGC/PGD lines (RB6/RB7) should be kept short and isolated from switching nodes.
Do not connect the ICSP PGC/PGD pins to heavily loaded driver outputs - this prevents in-circuit debugging and programming failures. Configuration bits must be set to enable the correct oscillator mode (HS for >10 MHz crystal, XT for 1-10 MHz, RC for cost-sensitive low-pin-count designs). The LVP (Low-Voltage Programming) bit should be disabled in production to free up RB5 as a general-purpose GPIO. Always clear the WDT (watchdog timer) in long-running loops to prevent unintended resets.
اطلاعات انطباق
TQFP-44 (PT) is RoHS compliant and lead-free per Microchip material declaration. Not formally AEC-Q100 qualified - select PIC18F46K80-I/PT or PIC18F4620-I/PT for automotive designs requiring AEC-Q100.