PIC18F2423-E/ML - 8-Bit 40MHz PIC MCU 16KB Flash | Microchip
料号： PIC18F2423-E/ML ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.84 | $6.84 |
| 10 | $6.15 | $61.50 |
| 100 | $5.47 | $547.00 |
| 500 | $4.92 | $2,460.00 |
| 1,000 | $4.45 | $4,450.00 |
PIC18F2423-E/ML 概述
An 8-bit PIC microcontroller is a Harvard-architecture CMOS device optimized for deterministic real-time control. It belongs to the broader hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. PIC18F devices add enhanced flash, deeper instruction pipelines, and C-friendly peripherals compared with baseline PIC16F parts, while staying architecturally simpler than 32-bit Cortex-M0 MCUs. Engineers select this class of device when deterministic interrupt latency, low sleep current, and legacy code compatibility matter more than raw compute throughput.
Key features of the PIC18F2423-E/ML include a 12-bit ADC with up to 10 input channels, one Enhanced USART, one MSSP (SPI/I2C), two analog comparators, and nanoWatt features such as multiple idle modes and run-time peripheral disabling. It supports in-circuit serial programming (ICSP) and In-Circuit Debug (ICD), and integrates a 16-level deep hardware stack with 32 kB of accessible program address space (16-bit wide).
The device uses a 16-bit wide instruction set with 8-bit data path, executed in a two-stage pipeline at up to 10 MIPS at 40 MHz. Internal oscillator options (8 MHz and 31 kHz) reduce BOM cost by eliminating external crystals for non-USB applications. Fail-safe clock monitor and two-speed oscillator start-up improve robustness for safety-critical loops. The 28-QFN (6x6) package exposes the central thermal pad for improved theta-JA and is pin-compatible with several other PIC18F 'K22' and 'F2x' family members.
Typical applications include industrial sensor signal conditioning, low-power remote controls, HVAC controllers, automotive body and climate modules, LED lighting controllers, and small battery-driven instruments. The 12-bit ADC with internal voltage reference suits transducer read-out, while the EUSART and MSSP cover both legacy RS-232/485 sensor bridges and modern I2C/SPI peripherals.
When designing with this part, pay attention to oscillator selection: the internal 8 MHz oscillator saves board space but reduces system clock accuracy to +/- 2%. For UART timing or LIN bus applications, an external crystal or resonator is recommended. The QFN exposed pad must be soldered to a sufficient copper pour (at least 1 cm^2) to keep junction temperature within the extended -40C to +125C operating range.
This page consolidates verified distributor inventory, drop-in same-package alternatives, and design guidance that goes beyond the bare datasheet, helping procurement and engineering teams evaluate the PIC18F2423-E/ML against cross-brand 8-bit MCU families.
直接替换替代料： PIC18F2423-E/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： PIC18F2423-E/ML （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, ADC, I/O Pins, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
PIC18F2523-E/ML
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F2423-I/ML
✅ 直接替换✓ 有现货
$4.21 / 个
查看数据手册 →PIC18F23K22-E/ML
✅ 直接替换✓ 有现货
$1.62 / 个
查看数据手册 →PIC18F24K22-E/ML
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18F2423-E/SP
✅ 直接替换✓ 有现货
$1.94 / 个
查看数据手册 →PIC18F2423-E/ML 最大额定值与电气特性
| Core Architecture | PIC 8-bit RISC (Harvard) |
| CPU Bit Width | 8-bit data / 16-bit instruction |
| Maximum CPU Frequency | 40 MHz |
| MIPS (Peak) | 10 MIPS at 40 MHz |
| Program Memory Type | Enhanced Flash |
| Program Memory Size | 16 KB (8K x 16) |
| Data RAM | 768 bytes |
| Data EEPROM | 256 bytes |
| I/O Pins | 25 |
| Supply Voltage Range | 4.2 V to 5.5 V |
| ADC | 12-bit, up to 10 channels |
| 工作温度 | -40C to +125C (extended, 'E' suffix) |
| 封装 | 28-QFN (6x6 mm) with exposed pad |
| 安装类型 | Surface Mount |
| Communication Interfaces | 1x EUSART, 1x MSSP (SPI/I2C) |
| Comparators | 2 analog comparators |
| RoHS 状态 | Compliant |
PIC18F2423-E/ML 引脚配置
| 引脚 1 | MCLR — Master Clear (reset, active low); also ICSP programming voltage input |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| 引脚 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC negative reference |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC positive reference |
| 引脚 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| 引脚 8 | VSS — Ground reference |
| 引脚 9 | OSC1/CLKI — Crystal/clock input |
| 引脚 10 | OSC2/CLKO — Crystal/clock output |
| 引脚 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| 引脚 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| 引脚 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| 引脚 14 | RC3 — PORTC bit 3 |
| 引脚 15 | RC4 — PORTC bit 4 |
| 引脚 16 | RC5 — PORTC bit 5 |
| 引脚 17 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| 引脚 18 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| 引脚 19 | VSS — Ground reference (additional) |
| 引脚 20 | VDD — Positive supply voltage |
| 引脚 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| 引脚 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| 引脚 23 | RB2 — PORTB bit 2 |
| 引脚 24 | RB3 — PORTB bit 3 |
| 引脚 25 | RB4 — PORTB bit 4 |
| 引脚 26 | RB5 — PORTB bit 5 |
| 引脚 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| 引脚 28 | RB7/PGD — PORTB bit 7 / ICSP data |
典型应用
PIC18F2423-E/ML 适用于 6 应用s: Industrial Sensor Signal Conditioning, HVAC Climate Controller, Low-Power Remote Control / IoT Edge Node, Automotive Body and Climate Module, LED Lighting Controller, Small Battery-Driven Test Instrument.
Industrial Sensor Signal Conditioning
The PIC18F2423-E/ML's 12-bit ADC with up to 10 input channels and 768 bytes RAM makes it well suited for industrial sensor read-out boards measuring temperature, pressure, and flow. With 40 MHz CPU speed, 10 MIPS throughput, and 16 KB flash, the MCU can run linearization, moving-average filtering, and HART or Modbus RTU framing over the EUSART without offloading. The extended -40C to +125C temperature grade allows mounting inside sealed enclosures near motors or heated machinery. Companion parts include an external instrumentation amp and an RS-485 transceiver.
推荐
HVAC Climate Controller
The PIC18F2423-E/ML's nanoWatt idle modes and 25 I/O pins are ideal for HVAC climate and damper control boards. It can drive triac-controlled fan stages, read NTC thermistors through the 12-bit ADC, and handle keypad inputs while idle current drops to microamps. The 256 bytes EEPROM holds setpoints and calibration constants across power cycles. Compared with discrete logic controllers, integrating ADC, EUSART, and timers into a single 28-QFN part saves PCB area and BOM cost in compact wall thermostats.
推荐
Low-Power Remote Control / IoT Edge Node
Battery-driven remote controls and small IoT edge nodes benefit from the PIC18F2423-E/ML's low-power Run, Idle, and Sleep modes plus the on-board 31 kHz secondary oscillator for RTC-style duty cycling. The EUSART and MSSP (SPI/I2C) talk to radios like sub-GHz transceivers or BLE modules, while the 12-bit ADC reads battery voltage and analog sensors. Wake-on-keypad or wake-on-RTC event modes draw sub-microamp currents between user interactions, enabling coin-cell designs with multi-year battery life.
推荐
Automotive Body and Climate Module
The extended -40C to +125C temperature grade of the PIC18F2423-E/ML allows deployment in body-control modules, climate panels, and mirror controllers in vehicles. The 25 I/O drive LED backlights, switches, and LIN-compatible EUSART, while the 12-bit ADC reads rheostats and battery voltage. Compared with bare automotive ASICs, the PIC18F2423-E/ML keeps firmware flexible for late-stage feature changes across car line variants. AEC-Q100 qualification is not present, so it is best suited to non-safety body and comfort zones.
推荐
LED Lighting Controller
The PIC18F2423-E/ML can run multi-channel LED lighting controllers using its MSSP SPI to drive daisy-chained LED drivers and its PWM-capable timers for analog dimming. The 12-bit ADC measures ambient light for daylight harvesting, while 16 KB flash stores color-space lookup tables and fade curves. The QFN package keeps the controller footprint under 1 cm^2 for in-fixture integration. The 'E' temperature grade handles enclosed-luminaires that can reach 70C ambient.
推荐
Small Battery-Driven Test Instrument
Handheld multimeters, cable testers, and field service tools use the PIC18F2423-E/ML for its small 28-QFN footprint, 16 KB flash for menu and calibration firmware, and 12-bit ADC for measurement read-out. The MSSP drives OLED or character LCDs via SPI, while the EUSART connects to USB-to-UART bridges for PC link. nanoWatt sleep modes extend battery life between uses, and EEPROM stores last calibration. This is a strong fit when deterministic interrupt response and low BOM cost matter more than raw MHz.
推荐
推荐产品汇总
工程参考数据： PIC18F2423-E/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 | PIC18F2523-E/ML | PIC18F2423-I/ML | PIC18F23K22-E/ML | PIC18F24K22-E/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) | 28-QFN (6x6) | 28-QFN (6x6) | 28-QFN (6x6) |
| Program Flash | 16 KB | 32 KB | 16 KB | 8 KB | 16 KB |
| Data RAM | 768 bytes | 1536 bytes | 768 bytes | 512 bytes | 768 bytes |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| Max CPU Speed | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) |
| ADC | 12-bit, 10 channels | 12-bit, 10 channels | 12-bit, 10 channels | 10-bit, 14 channels | 10-bit, 14 channels |
关键差异点
- Extended -40C to +125C temperature grade （对比 PIC18F2423-I/ML)
- Drop-in upgrade to 32 KB flash with same footprint （对比 PIC18F2523-E/ML)
- Newer K22 family offers XLP nanoWatt at wider voltage range （对比 PIC18F24K22-E/ML)
设计说明
Estimated: The 28-QFN (6x6) exposed thermal pad must be soldered to a continuous copper pour of at least 1 cm^2 on the top layer to keep theta-JA within the datasheet limit. Use an array of thermal vias (0.3 mm drill, 0.6 mm pitch) under the pad to spread heat into inner planes. Poor thermal pad soldering is the most common field failure for QFN PIC18F parts and triggers early thermal shutdown in extended-temperature designs.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 20) and a bulk 10 uF tantalum or ceramic on the supply rail. The PIC18F2423-E/ML's nanoWatt sleep current is sub-microamp, so any leakage path through the decoupling network can dominate idle power. For battery applications, prefer low-leakage X7R ceramics rather than Y5V.
Do not assume the internal 8 MHz oscillator is suitable for UART timing without calibration. For EUSART baud rates above 38.4 kbps or LIN bus, fit an external crystal or resonator on OSC1/OSC2 (pins 9/10). Failure to do so is the most common root cause of intermittent framing errors on PIC18F 'F2x' designs.
合规信息
RoHS and REACH compliance confirmed per Microchip product page. The 'E' temperature grade enables automotive body-zone deployment, but the part itself is not AEC-Q100 qualified; use AEC-Q100 parts for safety-critical automotive subsystems. Halogen-free status not explicitly stated in the verified web data.
