PIC18F4320T-I/PT - 8KB Flash 8-bit MCU 40MHz TQFP-44 | Microchip
MPN: PIC18F4320T-I/PT ✓ Hoạt độngPIC18F4320T-I/PT Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, RAM, non-volatile program memory, and peripherals such as timers, communication interfaces and ADCs. PIC18F-series parts sit in the 8-bit microcontrollers tier of the broader semiconductor hierarchy and are widely used for cost-sensitive embedded control. nanoWatt Technology is Microchip's family of dynamic power-management modes that reduce quiescent current during idle or sleep states to extend battery life.
Key features include 77 single-word instructions, an enhanced 16-bit instruction set, hardware multiplier, two 8-bit timers plus three 16-bit timers, a 10-bit ADC with up to 13 channels, and capture/compare/PWM (CCP) modules. The internal RC oscillator and wide operating voltage simplify designs by eliminating external clock components. PIC18F devices are supported by Microchip's MPLAB X IDE and XC8 compiler, providing a mature development ecosystem.
Typical applications include industrial control, consumer white goods, sensor signal conditioning, low-end human-machine interface (HMI), automotive body and aftermarket subsystems, and USB-to-UART bridges when paired with the PIC18F4550 family variant. With 36 I/O and 13 ADC channels the PIC18F4320 supports medium-density I/O designs that need modest processing.
When designing with this device, ensure VDD decoupling is placed close to the pins, leave MCLR accessible for in-system programming, and budget for a 5 V supply since the ADC reference and operating range require 4.2 V minimum. Compare against the 28-pin PIC18F2220 or 40-pin PIC18F4220 siblings when pin count or memory differ.
The PIC18F4320T-I/PT is widely stocked in distribution. The "T" suffix indicates tape-and-reel packaging and "I" denotes the industrial temperature grade. This page synthesizes distributor pricing, drop-in TQFP-44 alternatives, and practical design guidance not aggregated on the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC18F4320T-I/PT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC18F4320T-I/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Program Memory (Flash), ADC, Timers.
PIC18F4320-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4320-E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4221T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4220T-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4520-I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F4420-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F4320T-I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Core Size | 8-bit |
| Program Memory Size | 8 KB (4K x 16) Flash |
| RAM Size | 512 bytes |
| EEPROM Size | 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, up to 13 channels |
| Timers | 2 x 8-bit, 3 x 16-bit |
| CCP/PWM Modules | Yes (2) |
| Instruction Set | 77 single-word instructions, 16-bit wide |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial grade) |
| Hộp | 44-pin TQFP (10 x 10 mm) |
| Packaging | Tape and Reel (T suffix) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| nanoWatt Technology | Yes |
| Internal Oscillator | Yes (8 MHz, software selectable) |
Cấu hình chân PIC18F4320T-I/PT
| Chân 1 | RA2/AN2/VREF-/CVREF — PORTA bit 2 / Analog input 2 / DAC negative reference / comparator reference output |
| Chân 2 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC positive reference |
| Chân 3 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / Comparator 1 output |
| Chân 4 | RA5/AN4/SS/LVDIN — PORTA bit 5 / Analog input 4 / SPI slave select / LVD input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock input / PORTA bit 7 |
| Chân 7 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / PORTA bit 6 |
| Chân 8 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 9 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 input/output |
| Chân 10 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Chân 11 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 12 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Chân 13 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Chân 14 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Chân 15 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Chân 16 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 17 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 18 | RC6/TX/CK — PORTC bit 6 / USART async transmit / USART sync clock |
| Chân 19 | RC7/RX/DT — PORTC bit 7 / USART async receive / USART sync data |
| Chân 20 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Chân 21 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Chân 22 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Chân 23 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Chân 24 | VSS — Ground reference |
| Chân 25 | VDD — Positive supply voltage |
| Chân 26 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / PWM fault input |
| Chân 27 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| Chân 28 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| Chân 29 | RB3/INT3/CCP2 — PORTB bit 3 / External interrupt 3 / CCP2 alternate |
| Chân 30 | RB4 — PORTB bit 4 (interrupt-on-change) |
| Chân 31 | RB5 — PORTB bit 5 (interrupt-on-change) |
| Chân 32 | RB6/PGC — PORTB bit 6 / ICSP clock (programming) |
| Chân 33 | RB7/PGD — PORTB bit 7 / ICSP data (programming) |
| Chân 34 | RE0/RD/AN5 — PORTE bit 0 / Parallel Slave Port read / Analog input 5 |
| Chân 35 | RE1/WR/AN6 — PORTE bit 1 / Parallel Slave Port write / Analog input 6 |
| Chân 36 | RE2/CS/AN7 — PORTE bit 2 / Parallel Slave Port chip select / Analog input 7 |
| Chân 37 | MCLR/VPP — Master clear reset (active low) / programming voltage input |
| Chân 38 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 39 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 40 | VDD — Positive supply voltage |
| Chân 41 | VSS — Ground reference |
| Chân 42 | RB7 — PORTB bit 7 alternate (ICSP data) |
| Chân 43 | RB6 — PORTB bit 6 alternate (ICSP clock) |
| Chân 44 | AVDD — Analog positive supply voltage (tie to VDD) |
Ứng dụng tiêu biểu
PIC18F4320T-I/PT phù hợp cho 7 Áp dụngs: Industrial Control Systems, Consumer White Goods, Automotive Body and Aftermarket Electronics, Sensor Signal Conditioning Hubs, HMI Keypad and Display Controllers, Battery-Backed Data Loggers, Educational and Hobbyist Projects.
Industrial Control Systems
The PIC18F4320T-I/PT fits industrial control applications because its 36 I/O pins drive relays, solenoids and indicator LEDs directly, the 13-channel 10-bit ADC reads multiple sensor inputs, and the 8 KB Flash accommodates PID control loops with state-machine firmware. At 5 V and -40C to +85C the part handles factory-floor temperature swings. Compared to discrete logic controllers, the integrated CCP/PWM modules generate timing pulses for motor control, eliminating external timer ICs and reducing BOM cost.
Được đề xuất
Consumer White Goods
The PIC18F4320T-I/PT suits washing machines, microwave ovens and air-conditioner control boards because it integrates user-interface driving (keypad scanning, LED/LCD multiplexing) and sensor reading (temperature, water level, door switch) on a single chip. The nanoWatt sleep modes drop quiescent current to microamps in standby, saving energy when the appliance is idle. The 40 MHz clock handles 7-segment display refresh and button-debounce routines without CPU bottlenecking.
Được đề xuất
Automotive Body and Aftermarket Electronics
The PIC18F4320T-I/PT powers aftermarket automotive controllers such as alarm systems, central locking modules and gauge clusters because it supports -40C to +85C operation and 5 V supply rails common in 12 V vehicle systems. The enhanced USART interfaces with LIN bus transceivers for body networks, while the MSSP drives SPI peripherals such as EEPROM memory and SPI displays. For under-hood applications requiring 125C, upgrade to PIC18F4320-E/PT extended temperature variant.
Được đề xuất
Sensor Signal Conditioning Hubs
The PIC18F4320T-I/PT acts as a multi-sensor aggregator that reads 4-20 mA or 0-10 V analog inputs via its 13-channel ADC, applies linearization in firmware, and outputs processed values over RS-485 UART or SPI. Its 10 MIPS CPU runs digital filtering (moving-average, IIR) faster than PIC16F siblings, and the 8 KB Flash holds calibration tables and look-up routines for thermocouples, RTDs, and strain gauges. The internal 8 MHz oscillator eliminates external crystal cost in remote sensor nodes.
Được đề xuất
HMI Keypad and Display Controllers
The PIC18F4320T-I/PT serves as a low-cost HMI controller driving 4x4 matrix keypads, character LCDs (HD44780-compatible), and tri-color LED indicators because of its 36 I/O and PWM-capable CCP modules. The MSSP peripherals drive SPI displays and I2C EEPROMs concurrently, while the 10 MIPS throughput debounces key presses and refreshes LCD segments without perceived latency. For touch-screen HMIs requiring more RAM, upgrade to PIC18F47K40 family.
Được đề xuất
Battery-Backed Data Loggers
The PIC18F4320T-I/PT supports low-duty-cycle data logging applications when paired with an external RTC and serial EEPROM. The nanoWatt sleep current keeps quiescent draw low, while periodic wake-ups let the ADC sample temperature, voltage or pressure and store readings in external EEPROM over I2C. The 256-byte on-chip EEPROM provides backup storage for configuration data, while 8 KB Flash holds the logging firmware and compression routines.
Được đề xuất
Educational and Hobbyist Projects
The PIC18F4320T-I/PT is well suited for university embedded-systems courses and hobbyist projects because of its mature toolchain (MPLAB X IDE, XC8 compiler, PICkit programmers), extensive code examples, and breadboard-friendly TQFP-44 footprint with adapter PCB. The 8 KB Flash accommodates full C-based curricula including GPIO, timers, ADC, UART and interrupt programming. The device's PIC18 instruction set is widely documented in textbooks, easing learning.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F4320T-I/PT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC18F4320-I/PT | PIC18F4320-E/PT | PIC18F4221T-I/PT | PIC18F4220T-I/PT | PIC18F4520-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Flash Memory | 8 KB | 8 KB | 8 KB | 16 KB | 4 KB | 32 KB |
| RAM | 512 B | 512 B | 512 B | 768 B | 512 B | 1536 B |
| EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max Clock Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
| ADC Channels | 13 x 10-bit | 13 x 10-bit | 13 x 10-bit | 13 x 10-bit | 13 x 10-bit | 13 x 10-bit |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Packaging | Tape & Reel | Tray | Tray | Tape & Reel | Tape & Reel | Tray |
Bảo phân biệt quan trọng
- Same 44-pin TQFP-44 package across the entire PIC18F4320 family (vsPIC18F4520-I/PT)
- Industrial vs Extended temperature grading is the only difference within the family (vsPIC18F4320-E/PT)
- Tape-and-reel packaging optimized for SMT production lines (vsPIC18F4320-I/PT)
Ghi chú thiết kế
Decouple both VDD pins (25 and 40) with 100 nF ceramic capacitors placed within 5 mm of the pin, plus a bulk 10 uF tantalum or aluminum capacitor. Tie AVDD to VDD through a ferrite bead or 10 ohm resistor to filter ADC analog supply noise. For battery operation, the nanoWatt Sleep mode draws approximately 100 nA typical at 3 V - 30x lower than Run mode, so duty-cycling is essential. Brown-out reset must be enabled in CONFIG1L to protect against low-voltage Flash corruption.
TQFP-44 (10x10 mm, 0.8 mm pitch) requires PCB fabrication with 0.4 mm via-in-pad or tented vias; hand-soldering is feasible with a fine tip and flux but a reflow profile per JEDEC J-STD-020 is preferred for production. Route the ICSP pins (RB6/PGC, RB7/PGD, MCLR/VPP) directly to a 6-pin header with no series resistors for in-circuit programming. Place the crystal oscillator within 5 mm of OSC1/OSC2 and guard the traces with a ground pour to reduce EMI.
Do not leave MCLR floating - tie it to VDD through a 10 kohm resistor for normal operation, or drive it from a supervisor / reset IC for production boards. A floating MCLR causes erratic resets. When using the internal oscillator, configure OSCCON defaults in firmware startup - leaving the fuse-set external crystal mode uninitialized traps the MCU. For ADC accuracy, add 1 uF + 100 nF on the VREF+ pin (RA3) when used as a reference, and average at least 16 samples to suppress noise.
Route the analog inputs (AN0-AN7 on PORTA and PORTE) away from digital switching signals to preserve ADC SNR. The PSP bus pins (RD0-RD7, RE0-RE2) are 5 V tolerant and drive higher currents than other I/O; route them on a separate bus and add 100 ohm series resistors near the MCU to dampen reflections when used with parallel peripherals. The CCP1/CCP2 PWM outputs (RC2, RC1) should route to MOSFET gates via 10 ohm gate resistors to control slew rate.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - choose PIC18F4320-E/PT for extended temperature or other AEC-Q100-qualified PIC18F family members for automotive. Lead-free matte-tin plating. Halogen-free molding compound. Conflict-minerals declaration per Microchip sustainability report.