PIC18F4320-E/PT - 8KB Flash MCU 40MHz 36 I/O TQFP-44 | Microchip
N.º da peça: PIC18F4320-E/PT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 Visão geral
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.
Alternativas drop-in para PIC18F4320-E/PT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC18F4320-E/PT (mesmo formato e footprint) — diferindo em Package, Program Memory (Flash), ADC, Core, Mounting Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC18F4320-I/PT
✅ Drop-In✓ Em estoque
$3.62 / unidade
Ver ficha técnica →PIC18F4320-E/P
✅ Drop-In✓ Em estoque
$2.95 / unidade
Ver ficha técnica →PIC18F4520-I/PT
✅ Drop-In✓ Em estoque
$4.05 / unidade
Ver ficha técnica →PIC18F46K80-I/PT
✅ Drop-In✓ Em estoque
$4.21 / unidade
Ver ficha técnica →PIC18F4420-I/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC18F2580-I/SP
✅ Drop-In✓ Em estoque
$4.55 / unidade
Ver ficha técnica →PIC18F4320-E/PT Classificações máximas e características elétricas
| 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 |
| Encapsulamento | 44-pin TQFP (PT), 10x10 mm |
| Faixa de temperatura de operação | -40C to +125C (Extended, -E suffix) |
| In-Circuit Debug | Yes (ICD) |
| Self-Programming | Yes |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do PIC18F4320-E/PT
| Pino 1 | RA2/AN2/VREF- — PORTA bit 2 / ADC input 2 / negative voltage reference |
| Pino 2 | RA3/AN3/VREF+ — PORTA bit 3 / ADC input 3 / positive voltage reference |
| Pino 3 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input / Comparator 1 output |
| Pino 4 | RA5/AN4/SS/LVDIN — PORTA bit 5 / ADC input 4 / SPI slave select / LVD input |
| Pino 5 | RE0/RD/AN5 — PORTE bit 0 / read control / ADC input 5 |
| Pino 6 | RE1/WR/AN6 — PORTE bit 1 / write control / ADC input 6 |
| Pino 7 | RE2/CS/AN7 — PORTE bit 2 / chip select / ADC input 7 |
| Pino 8 | VDD — Positive supply voltage |
| Pino 9 | VSS — Ground |
| Pino 10 | RB0/INT0/FLT0 — PORTB bit 0 / external interrupt 0 / PWM fault input |
| Pino 11 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pino 12 | RB2/INT2/CANTX — PORTB bit 2 / external interrupt 2 (CAN TX on F2480/F2580) |
| Pino 13 | RB3/INT3/CANRX — PORTB bit 3 / external interrupt 3 (CAN RX on F2480/F2580) |
| Pino 14 | RB4/KBI0 — PORTB bit 4 / keyboard interrupt 0 |
| Pino 15 | RB5/KBI1/PGM — PORTB bit 5 / keyboard interrupt 1 / LVP programming |
| Pino 16 | RB6/KBI2/PGC — PORTB bit 6 / keyboard interrupt 2 / ICSP clock |
| Pino 17 | RB7/KBI3/PGD — PORTB bit 7 / keyboard interrupt 3 / ICSP data |
| Pino 18 | VSS — Ground |
| Pino 19 | VDD — Positive supply voltage |
| Pino 20 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pino 21 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| Pino 22 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pino 23 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 24 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 25 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 26 | RC6/TX/CK — PORTC bit 6 / EUSART transmit / clock |
| Pino 27 | RC7/RX/DT — PORTC bit 7 / EUSART receive / data |
| Pino 28 | VSS — Ground |
| Pino 29 | VDD — Positive supply voltage |
| Pino 30 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock in / PORTA bit 7 |
| Pino 31 | OSC2/CLKO/RA6 — Crystal oscillator output / clock out / PORTA bit 6 |
| Pino 32 | VSS — Ground |
| Pino 33 | VDD — Positive supply voltage |
| Pino 34 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Pino 35 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Pino 36 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Pino 37 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Pino 38 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Pino 39 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Pino 40 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Pino 41 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| Pino 42 | VSS — Ground |
| Pino 43 | VDD — Positive supply voltage |
| Pino 44 | RA0/AN0 — PORTA bit 0 / ADC input 0 |
| Pino 45 | RA1/AN1 — PORTA bit 1 / ADC input 1 |
Aplicações típicas
PIC18F4320-E/PT é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC18F4320-E/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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) |
Principais diferenciais
- Extended temperature grade to +125C (vs PIC18F4320-I/PT)
- Code-compatible upgrade path to 32 KB Flash (vs PIC18F4520-I/PT)
- CAN-bus enabled variant available in same footprint (vs PIC18F2580-I/SP)
Notas de projeto
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.
Informações de conformidade
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.