PIC18LF4320T-I/ML - 8KB Flash 8-Bit MCU 44-VQFN | Microchip
料号： PIC18LF4320T-I/ML ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.27 | $7.27 |
| 10 | $6.54 | $65.40 |
| 100 | $5.82 | $582.00 |
| 500 | $5.21 | $2,605.00 |
| 1,000 | $4.68 | $4,680.00 |
PIC18LF4320T-I/ML 概述
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), and programmable peripherals. The PIC18F/LF family is Microchip's high-performance 8-bit architecture offering enhanced instruction set, C-friendly compiler support (MPLAB XC8), and nanoWatt Technology for dynamic power management. MCUs sit within the broader taxonomy of microprocessors -> computing ICs -> embedded processors -> microcontrollers, and dominate cost-sensitive, low-power embedded designs.
Key features include 36 digital I/O pins, a 10-bit ADC with up to 13 input channels, multiple serial interfaces (USART, MSSP for SPI/I2C), four timer modules, and nanoWatt power management modes. The 44-VQFN exposed pad package provides low thermal resistance for improved power dissipation in compact layouts, while the 8 KB flash supports typical mid-complexity embedded applications.
The architecture uses a 16-bit modified Harvard instruction set with an 8-bit data path, achieving up to 10 MIPS at 40 MHz. Internal PLL options allow flexible clocking from low-frequency crystals, and the device supports ICSP (In-Circuit Serial Programming) for field updates. Brown-out Reset, Power-on Reset, and a Watchdog Timer ensure reliable operation in industrial environments.
Typical applications include industrial sensor interfaces, HVAC controls, low-power remote sensing nodes, small appliance controllers, and consumer electronics requiring USB-free, USB-less connectivity. The 13-channel 10-bit ADC is well suited for analog sensor reading, while multiple PWM outputs enable motor or LED control tasks.
When designing with this device, ensure the exposed pad (EP) is soldered to a sufficiently large copper pour for thermal performance. The LF variant's low-voltage operation (down to 2.0 V) enables two-AA-battery or single Li-cell designs but does not support 5V-only analog performance of the F variant.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, supporting engineers searching for cross-reference, replacement, and integration guidance for the PIC18LF4320T-I/ML.
直接替换替代料： PIC18LF4320T-I/ML ——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： PIC18LF4320T-I/ML （相同外形与封装尺寸） ——差异在于 Package, Timers, ADC, Core, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC18LF4320-I/ML
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F4320-I/ML
✅ 直接替换📋 参考替代料（不在目录中）
PIC18LF4320T-I/PT
✅ 直接替换✓ 有现货
$4.15 / 个
查看数据手册 →PIC18LF4221-I/ML
✅ 直接替换✓ 有现货
$2.85 / 个
查看数据手册 →PIC18LF4220-I/ML
✅ 直接替换✓ 有现货
$4.61 / 个
查看数据手册 →PIC18LF4320-I/PT
✅ 直接替换✓ 有现货
$5.9 / 个
查看数据手册 →PIC18LF4320T-I/ML 最大额定值与电气特性
| Core Architecture | PIC 8-bit (PIC18 enhanced) |
| Program Memory Size | 8 KB (4K x 16) Flash |
| Data RAM | 512 bytes |
| EEPROM Size | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, up to 13 channels |
| 封装 | 44-pin VQFN (ML) with Exposed Pad |
| 工作温度 | -40C to +85C (Industrial) |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel |
| Timers | 4 (Timer0/1/2/3) |
| Communication Interfaces | USART, MSSP (SPI/I2C) |
| RoHS Compliance | Compliant |
| Power-Saving Modes | nanoWatt Technology (Sleep, Idle) |
PIC18LF4320T-I/ML 引脚配置
| 引脚 1 | MCLR/VPP/RE3 — Master Clear (Reset) input / Programming voltage / PORTE bit 3 |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| 引脚 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| 引脚 8 | RE0/RD/AN5 — PORTE bit 0 / Read signal / Analog input 5 |
| 引脚 9 | RE1/WR/AN6 — PORTE bit 1 / Write signal / Analog input 6 |
| 引脚 10 | RE2/CS/AN7 — PORTE bit 2 / Chip Select / Analog input 7 |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | OSC1/CLKI/RA7 — Oscillator input / External clock / PORTA bit 7 |
| 引脚 14 | OSC2/CLKO/RA6 — Oscillator output / Clock output / PORTA bit 6 |
| 引脚 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock |
| 引脚 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 引脚 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 19 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 20 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 21 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| 引脚 22 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| 引脚 23 | RB0/AN12/INT0 — PORTB bit 0 / Analog input 12 / External interrupt 0 |
| 引脚 24 | RB1/AN10/INT1 — PORTB bit 1 / Analog input 10 / External interrupt 1 |
| 引脚 25 | RB2/AN8/INT2 — PORTB bit 2 / Analog input 8 / External interrupt 2 |
| 引脚 26 | RB3/AN9/CCP2 — PORTB bit 3 / Analog input 9 / CCP2 |
| 引脚 27 | RB4/AN11 — PORTB bit 4 / Analog input 11 |
| 引脚 28 | RB5/PGM — PORTB bit 5 / LVP programming |
| 引脚 29 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 30 | RB7/PGD — PORTB bit 7 / ICSP data |
| 引脚 31 | VDD — Positive supply voltage |
| 引脚 32 | VSS — Ground reference |
| 引脚 33 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| 引脚 34 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| 引脚 35 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| 引脚 36 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| 引脚 37 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| 引脚 38 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| 引脚 39 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| 引脚 40 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| 引脚 41 | VDD — Positive supply voltage |
| 引脚 42 | VSS — Ground reference |
| 引脚 43 | NC — Not connected (per datasheet) |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
PIC18LF4320T-I/ML 适用于 6 应用s: Industrial Sensor Interface, HVAC Climate Control, Low-Power Remote Sensing Node, Small Appliance Controller, Automotive Accessory Module, USB-Free Consumer Electronics.
Industrial Sensor Interface
The PIC18LF4320T-I/ML is well-suited for industrial sensor interface modules requiring multi-channel analog acquisition. The integrated 13-channel 10-bit ADC provides direct connection to temperature, pressure, and flow sensors without external multiplexing. Its 2.0-5.5 V operating range accommodates both 3.3 V and 5 V transducer rails, while 36 GPIO pins handle multiple discrete sensor inputs and digital outputs. The -40C to +85C industrial temperature grade ensures reliable operation in factory-floor enclosures. nanoWatt Sleep mode drops quiescent current to nanoampere levels for battery-backed sensor nodes that wake periodically to log measurements.
推荐
HVAC Climate Control
HVAC controller boards benefit from the PIC18LF4320T-I/ML's combination of 8 KB flash for control firmware, 13 ADC channels for thermistor and humidity sensor inputs, and PWM outputs for damper and fan motor control. The MSSP peripheral supports SPI or I2C communication with external display drivers and EEPROM. nanoWatt Idle and Sleep modes reduce energy waste during standby periods. The wide 2.0-5.5 V supply range allows direct operation from rectified 5 V wall-adapter rails or 24 VAC control circuits with simple rectification.
推荐
Low-Power Remote Sensing Node
Battery-powered remote sensor nodes leverage the PIC18LF4320T-I/ML's LF low-voltage core operating down to 2.0 V, enabling direct connection to a single Li-ion cell or two AA batteries. nanoWatt Technology Sleep mode reduces quiescent current to under 100 nA, allowing multi-year battery life when the MCU wakes briefly to take ADC readings and transmit via UART. The 8 KB flash stores calibration coefficients and protocol stacks, while 512 bytes of RAM buffers sensor data. The exposed pad 44-VQFN package provides low thermal resistance for sustained operation in outdoor enclosures.
推荐
Small Appliance Controller
Consumer small appliances such as coffee makers, blenders, and washing machines use the PIC18LF4320T-I/ML for user-interface management and motor control. Four timer modules generate PWM signals for variable-speed motor drives, while the USART interfaces with LCD or LED display drivers. 36 GPIO pins handle keypad scanning, status LEDs, and relay outputs. The 44-VQFN package fits compact appliance PCBs, and industrial -40C to +85C temperature tolerance handles kitchen and laundry room environments. Brown-out Reset and Watchdog Timer ensure reliable recovery from supply glitches.
推荐
Automotive Accessory Module
The PIC18LF4320T-I/ML operates across the automotive 12 V nominal rail (regulated down to 5 V or 3.3 V) for accessory modules such as interior lighting controllers, seat-position memories, and aftermarket gauge clusters. Its 13-channel ADC reads multiple potentiometers and analog sensors simultaneously. The Watchdog Timer and Brown-out Reset ensure reliable recovery from automotive load-dump transients. Note that for AEC-Q100 qualified automotive designs, Microchip recommends the PIC18F series with the -I automotive grade; the PIC18LF4320T-I/ML is industrial grade only and not AEC-Q100 qualified.
推荐
USB-Free Consumer Electronics
Consumer devices that require moderate processing power without USB connectivity can leverage the PIC18LF4320T-I/ML's 8 KB flash and USART plus MSSP peripherals for peripheral interconnect. Typical uses include electronic toys, digital thermostats, simple point-of-sale terminals, and educational electronics kits. The MPLAB XC8 C compiler support allows developers to write portable firmware, while ICSP enables in-circuit programming during production. The 44-VQFN package suits miniaturized consumer form factors.
推荐
推荐产品汇总
工程参考数据： PIC18LF4320T-I/ML ——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 | PIC18LF4320-I/ML | PIC18F4320-I/ML | PIC18LF4320T-I/PT | PIC18LF4221-I/ML | PIC18LF4220-I/ML |
|---|---|---|---|---|---|---|
| Package | 44-VQFN (ML) | 44-VQFN (ML) - same | 44-VQFN (ML) - same | 44-TQFP (PT) - pin-compatible electrically, different PCB footprint | 44-VQFN (ML) - same | 44-VQFN (ML) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 8 KB | 8 KB | 4 KB (-50%) | 4 KB (-50%) |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 256 bytes (-50%) | 256 bytes (-50%) |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V (F variant) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Max CPU 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 | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels |
| Packaging Format | Tape & Reel | Tray | Tray | Tape & Reel | Tray | Tray |
关键差异点
- Low-voltage LF operation down to 2.0 V （对比 PIC18F4320-I/ML)
- Tape & Reel packaging for high-volume assembly （对比 PIC18LF4320-I/ML)
- VQFN package with exposed thermal pad （对比 PIC18LF4320T-I/PT)
- Highest flash density in 44-VQFN LF family （对比 PIC18LF4221-I/ML)
设计说明
The 44-pin VQFN (ML) package features an exposed thermal pad on the underside that MUST be soldered to a sufficiently large copper pour (typically at least 1 square inch) connected to the ground plane. Failure to solder the exposed pad will result in poor thermal performance and potential reliability issues under sustained load. Place decoupling capacitors (100 nF ceramic plus 10 uF bulk) as close as possible to each VDD pin pair to minimize switching noise.
The PIC18LF4320T-I/ML operates from 2.0 V to 5.5 V as an LF variant. nanoWatt Sleep mode reduces quiescent current to approximately 100 nA typical, but peripheral modules left enabled can increase this by orders of magnitude. Always disable unused peripherals via their PMDx registers before entering Sleep. For battery-powered designs, choose the LF variant specifically; do not assume F-variant parts will operate reliably below 4.2 V.
Do not confuse the PIC18LF4320T-I/ML (low-voltage LF variant, 2.0-5.5 V) with the PIC18F4320-I/ML (5 V F variant, 4.2-5.5 V). The two parts share pinout but have different voltage specifications and ADC performance characteristics. Also verify configuration bits match your application: oscillator selection (HS vs XT vs RC), Watchdog Timer enable, Brown-out Reset voltage, and Low-Voltage Programming disable must all be set correctly in the CONFIG registers.
Place the ICSP connector footprint (RB6/PGC, RB7/PGD, MCLR/VPP) at the board edge for easy in-circuit programming access during production. Route MCLR with a pull-up resistor to VDD and consider adding a capacitor to ground for noise filtering. Keep analog input traces short and away from digital switching signals to minimize ADC noise coupling; use a ground guard ring around analog input pins for best ADC accuracy.
合规信息
RoHS and lead-free compliant per Microchip product page. Industrial -40C to +85C temperature grade; NOT AEC-Q100 qualified - select PIC18F automotive-grade variants for vehicle applications. Conflict-minerals compliant per Microchip policy.
