PIC18F2423-E/ML - 8-Bit 40MHz PIC MCU 16KB Flash | Microchip
MPN: PIC18F2423-E/ML ✓ Hoạt độngPIC18F2423-E/ML Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC18F2423-E/ML — 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 PIC18F2423-E/ML (cùng hình factor và footprint) — khác nhau ở Operating Temperature, Package, ADC, I/O Pins, Mounting Type.
PIC18F2523-E/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F2423-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F23K22-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F24K22-E/ML
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F2423-E/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2423-E/ML Tỷ lệ tối đa & tính chất điện
| 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 |
| Nhiệt độ hoạt động | -40C to +125C (extended, 'E' suffix) |
| Hộp | 28-QFN (6x6 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Communication Interfaces | 1x EUSART, 1x MSSP (SPI/I2C) |
| Comparators | 2 analog comparators |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F2423-E/ML
| Chân 1 | MCLR — Master Clear (reset, active low); also ICSP programming voltage input |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC negative reference |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC positive reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKI — Crystal/clock input |
| Chân 10 | OSC2/CLKO — Crystal/clock output |
| Chân 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Chân 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 14 | RC3 — PORTC bit 3 |
| Chân 15 | RC4 — PORTC bit 4 |
| Chân 16 | RC5 — PORTC bit 5 |
| Chân 17 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| Chân 18 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| Chân 19 | VSS — Ground reference (additional) |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Chân 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Chân 23 | RB2 — PORTB bit 2 |
| Chân 24 | RB3 — PORTB bit 3 |
| Chân 25 | RB4 — PORTB bit 4 |
| Chân 26 | RB5 — PORTB bit 5 |
| Chân 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Ứng dụng tiêu biểu
PIC18F2423-E/ML phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F2423-E/ML — 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 | 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 |
Bảo phân biệt quan trọng
- Extended -40C to +125C temperature grade (vsPIC18F2423-I/ML)
- Drop-in upgrade to 32 KB flash with same footprint (vsPIC18F2523-E/ML)
- Newer K22 family offers XLP nanoWatt at wider voltage range (vsPIC18F24K22-E/ML)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
