PIC18F4320-E/PT - 8KB Flash MCU 40MHz 36 I/O TQFP-44 | Microchip
料号： PIC18F4320-E/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.45 | $7.45 |
| 10 | $6.91 | $69.10 |
| 100 | $6.12 | $612.00 |
| 500 | $5.43 | $2,715.00 |
| 1,000 | $4.85 | $4,850.00 |
| 3,000 | $4.2 | $12,600.00 |
PIC18F4320-E/PT 概述
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.
直接替换替代料： PIC18F4320-E/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F4320-E/PT （相同外形与封装尺寸） ——差异在于 Package, Program Memory (Flash), ADC, Core, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
PIC18F4320-I/PT
✅ 直接替换✓ 有现货
$3.62 / 个
查看数据手册 →PIC18F4320-E/P
✅ 直接替换✓ 有现货
$2.95 / 个
查看数据手册 →PIC18F4520-I/PT
✅ 直接替换✓ 有现货
$4.05 / 个
查看数据手册 →PIC18F46K80-I/PT
✅ 直接替换✓ 有现货
$4.21 / 个
查看数据手册 →PIC18F4420-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F2580-I/SP
✅ 直接替换✓ 有现货
$4.55 / 个
查看数据手册 →PIC18F4320-E/PT 最大额定值与电气特性
| 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 |
| 封装 | 44-pin TQFP (PT), 10x10 mm |
| 工作温度范围 | -40C to +125C (Extended, -E suffix) |
| In-Circuit Debug | Yes (ICD) |
| Self-Programming | Yes |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC18F4320-E/PT 引脚配置
| 引脚 1 | RA2/AN2/VREF- — PORTA bit 2 / ADC input 2 / negative voltage reference |
| 引脚 2 | RA3/AN3/VREF+ — PORTA bit 3 / ADC input 3 / positive voltage reference |
| 引脚 3 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / Comparator 1 output |
| 引脚 4 | RA5/AN4/SS/LVDIN — PORTA bit 5 / ADC input 4 / SPI slave select / LVD input |
| 引脚 5 | RE0/RD/AN5 — PORTE bit 0 / read control / ADC input 5 |
| 引脚 6 | RE1/WR/AN6 — PORTE bit 1 / write control / ADC input 6 |
| 引脚 7 | RE2/CS/AN7 — PORTE bit 2 / chip select / ADC input 7 |
| 引脚 8 | VDD — Positive supply voltage |
| 引脚 9 | VSS — Ground |
| 引脚 10 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 / PWM fault input |
| 引脚 11 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| 引脚 12 | RB2/INT2/CANTX — PORTB bit 2 / external interrupt 2 (CAN TX on F2480/F2580) |
| 引脚 13 | RB3/INT3/CANRX — PORTB bit 3 / external interrupt 3 (CAN RX on F2480/F2580) |
| 引脚 14 | RB4/KBI0 — PORTB bit 4 / keyboard interrupt 0 |
| 引脚 15 | RB5/KBI1/PGM — PORTB bit 5 / keyboard interrupt 1 / LVP programming |
| 引脚 16 | RB6/KBI2/PGC — PORTB bit 6 / keyboard interrupt 2 / ICSP clock |
| 引脚 17 | RB7/KBI3/PGD — PORTB bit 7 / keyboard interrupt 3 / ICSP data |
| 引脚 18 | VSS — Ground |
| 引脚 19 | VDD — Positive supply voltage |
| 引脚 20 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| 引脚 21 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| 引脚 22 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 引脚 23 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 24 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 25 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 26 | RC6/TX/CK — PORTC bit 6 / EUSART transmit / clock |
| 引脚 27 | RC7/RX/DT — PORTC bit 7 / EUSART receive / data |
| 引脚 28 | VSS — Ground |
| 引脚 29 | VDD — Positive supply voltage |
| 引脚 30 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock in / PORTA bit 7 |
| 引脚 31 | OSC2/CLKO/RA6 — Crystal oscillator output / clock out / PORTA bit 6 |
| 引脚 32 | VSS — Ground |
| 引脚 33 | VDD — Positive supply voltage |
| 引脚 34 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| 引脚 35 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| 引脚 36 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| 引脚 37 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| 引脚 38 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| 引脚 39 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| 引脚 40 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| 引脚 41 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| 引脚 42 | VSS — Ground |
| 引脚 43 | VDD — Positive supply voltage |
| 引脚 44 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| 引脚 45 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
典型应用
PIC18F4320-E/PT 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC18F4320-E/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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) |
关键差异点
- Extended temperature grade to +125C （对比 PIC18F4320-I/PT)
- Code-compatible upgrade path to 32 KB Flash （对比 PIC18F4520-I/PT)
- CAN-bus enabled variant available in same footprint （对比 PIC18F2580-I/SP)
设计说明
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.
合规信息
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.