PIC18F2423-E/SP - 8-bit 40MHz MCU, 16KB Flash, 28-SPDIP | Microchip
MPN: PIC18F2423-E/SP ✓ Hoạt độngPIC18F2423-E/SP Tóm tắt
A PIC18 microcontroller is a member of Microchip's 8-bit MCU family that pairs Harvard-architecture RISC performance (most instructions execute in one cycle) with rich on-chip peripherals, making it a workhorse for embedded control across consumer, industrial, and automotive markets. Within the broader taxonomy it sits as: microcontroller -> MCU -> embedded processor -> semiconductor IC. The PIC18F family specifically targets applications that need more code space, more RAM, and more peripherals than the baseline PIC16F, but where a 16-bit or 32-bit MCU would be over-spec and over-budget.
Key specifications that differentiate this part include its nanoWatt Technology dynamic power-management modes (Idle, Sleep, and multiple oscillator options), the high-performance 10-bit ADC capable of 30 ksps, and an internal RC oscillator that eliminates an external crystal in cost-sensitive designs. The Enhanced Flash memory supports >100,000 erase/write cycles typical, and the device supports in-circuit serial programming (ICSP) plus in-circuit debugging through ICD.
Architecturally, the PIC18F2423 uses a 16-bit instruction word with separate program and data buses (Harvard), an 8-level hardware stack, and prioritized interrupts. The CPU executes most instructions in a single instruction cycle (4 system clock ticks), giving roughly 10 MIPS throughput at 40 MHz. The MSSP peripheral handles both SPI master/slave and I2C master/slave protocols, while the EUSART provides asynchronous and synchronous serial with auto-baud detect.
Typical applications include industrial sensor conditioning, HVAC fan/blower control, small appliance motor control (via CCP/PWM), home-automation node controllers, automotive body electronics (climate, lighting, mirror modules), battery chargers, and digital display drivers. The wide operating voltage range (4.2 V to 5.5 V) and the -E temperature grade allow direct deployment in 5 V industrial and 12 V automotive point-of-load designs.
When designing with this device, observe that the 28-SPDIP package is intended for through-hole boards and development prototypes; for volume production the same die is offered in SOIC, QFN, and TQFP packages. Decouple VDD with a 100 nF ceramic placed within 5 mm of the pin, and if the ADC is used, populate the AVdd/AVss pair with their own filtered supply and a 10 uF + 100 nF decoupling network to keep reference noise below 1 LSB.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the PIC18 family, and practical design notes that complement (not duplicate) the manufacturer datasheet, helping engineers shorten the component-selection cycle.
Bộ thay thế dễ dàng lắp đặt cho PIC18F2423-E/SP — 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/SP (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Internal Oscillator, ADC, Timers.
PIC18F2420-E/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2423-I/SP
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F2523-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2523-E/SP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC18F2420-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2423-E/SP Tỷ lệ tối đa & tính chất điện
| Core | PIC18, 8-bit RISC |
| Program Memory | 16 KB (8K x 16) Flash |
| Data RAM | 768 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Frequency | 40 MHz |
| Operating Voltage | 4.2 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +125 C (Extended, -E) |
| I/O Pins | 25 |
| ADC | 10-bit, up to 10 channels |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Capture/Compare/PWM | 2 CCP modules |
| Serial Interfaces | 1 x EUSART, 1 x MSSP (SPI / I2C) |
| Hộp | 28-pin SPDIP (Skinny DIP, 0.300 inch) |
| Kiểu lắp đặt | Through-Hole |
| Power-Saving Modes | nanoWatt (Idle, Sleep, multiple oscillator modes) |
| In-Circuit Programming | ICSP / ICD |
| Cấp MSL | 1 (unlimited, no dry pack) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC18F2423-E/SP
| Chân 1 | MCLR/RA5 — Master Clear (reset) input or digital I/O RA5 |
| Chân 2 | RA0/AN0 — Digital I/O RA0 / analog input AN0 |
| Chân 3 | RA1/AN1 — Digital I/O RA1 / analog input AN1 |
| Chân 4 | RA2/AN2 — Digital I/O RA2 / analog input AN2 |
| Chân 5 | RA3/AN3 — Digital I/O RA3 / analog input AN3 |
| Chân 6 | RA4/T0CKI — Digital I/O RA4 / Timer0 clock input |
| Chân 7 | RA5/AN4 — Digital I/O RA5 / analog input AN4 |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/RA7 — Oscillator input / digital I/O RA7 |
| Chân 10 | OSC2/RA6 — Oscillator output / digital I/O RA6 |
| Chân 11 | RC0/T1OSO — Digital I/O RC0 / Timer1 oscillator output |
| Chân 12 | RC1/T1OSI — Digital I/O RC1 / Timer1 oscillator input |
| Chân 13 | RC2/CCP1 — Digital I/O RC2 / CCP1 PWM output |
| Chân 14 | RC3/SCL — Digital I/O RC3 / I2C clock (MSSP) |
| Chân 15 | RC4/SDA — Digital I/O RC4 / I2C data (MSSP) |
| Chân 16 | RC5/SDO — Digital I/O RC5 / SPI data out (MSSP) |
| Chân 17 | RC6/TX/CK — Digital I/O RC6 / EUSART TX / SPI clock |
| Chân 18 | RC7/RX/DT — Digital I/O RC7 / EUSART RX / SPI data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply (4.2 V to 5.5 V) |
| Chân 21 | RB0/AN12/INT0 — Digital I/O RB0 / analog AN12 / external interrupt 0 |
| Chân 22 | RB1/AN10/INT1 — Digital I/O RB1 / analog AN10 / external interrupt 1 |
| Chân 23 | RB2/AN8 — Digital I/O RB2 / analog input AN8 |
| Chân 24 | RB3/AN9/CCP2 — Digital I/O RB3 / analog AN9 / CCP2 PWM |
| Chân 25 | RB4/AN11 — Digital I/O RB4 / analog input AN11 |
| Chân 26 | RB5/AN13 — Digital I/O RB5 / analog input AN13 |
| Chân 27 | RB6/PGC — Digital I/O RB6 / ICSP clock |
| Chân 28 | RB7/PGD — Digital I/O RB7 / ICSP data |
Ứng dụng tiêu biểu
PIC18F2423-E/SP phù hợp cho 7 Áp dụngs: Industrial Sensor Conditioning & Acquisition Node, HVAC Fan & Blower Motor Control, Automotive Body Electronics Module, Small Appliance Control Board, Smart Home Sensor / Actuator Node, Battery Charger Controller, Digital Display Driver Board.
Industrial Sensor Conditioning & Acquisition Node
The PIC18F2423-E/SP is a strong fit for industrial 4-20 mA loop sensor nodes because its 10-bit ADC (up to 10 channels, 30 ksps) and 4.2 V to 5.5 V supply align directly with 5 V sensor bridges. The EUSART handles RS-485 link to a PLC, while MSSP drives an I2C front-end display. With nanoWatt Sleep mode drawing under 1 uA, the part lets battery-backed nodes survive multi-year deployments at -40 C to +125 C.
Được đề xuất
HVAC Fan & Blower Motor Control
The PIC18F2423-E/SP's two CCP/PWM modules at up to 40 MHz deliver 10-bit PWM resolution, sufficient for variable-speed BLDC or brushed-DC HVAC blower drives. The 16 KB Flash holds state-machine firmware plus fault-handling routines, and 25 I/O accommodate tachometer input, zero-cross detect, triac gate drive, and keypad interface. The extended -40 C to +125 C range covers rooftop and attic HVAC electronics without derating.
Được đề xuất
Automotive Body Electronics Module
In 12 V automotive body modules such as mirror controllers, seat-position memory, or interior lighting, the PIC18F2423-E/SP provides 25 robust I/O with 5 V tolerance and operates across the full automotive under-hood temperature envelope. Its MSSP/SPI can drive LED driver ICs and EEPROM data logs while EUSART handles LIN-bus communication via an external transceiver. The 16 KB Flash accommodates OBD-II-style diagnostic state machines.
Được đề xuất
Small Appliance Control Board
Coffee makers, blenders, induction cookers, and washing-machine user-interface boards use the PIC18F2423-E/SP to read capacitive touch via the ADC, drive seven-segment or OLED displays through SPI, and switch triac-driven heater loads via CCP/PWM. The 768 B RAM comfortably holds a UI state machine plus debounce buffers, and the 28-SPDIP package eases hand-soldering on low-volume appliance lines.
Được đề xuất
Smart Home Sensor / Actuator Node
For Zigbee or sub-GHz smart-home endpoints, the PIC18F2423-E/SP serves as the host MCU driving an external radio module over SPI while reading temperature, occupancy, and light sensors via its 10-bit ADC. Its nanoWatt Sleep mode (<1 uA) and 16 KB Flash fit battery-powered door/window sensors that sleep for years between wake events. The extended temperature range supports outdoor and garage installations.
Được đề xuất
Battery Charger Controller
Lead-acid and Li-ion charger designs use the PIC18F2423-E/SP to sense charge current via the ADC, modulate a synchronous buck converter's duty cycle through CCP/PWM, and stream telemetry over EUSART. The 4.2 V to 5.5 V operating range covers single-cell Li-ion stacks directly. With 256 B EEPROM, the MCU stores charge profile parameters and cycle-count telemetry for warranty logging across -40 C to +125 C operation.
Được đề xuất
Digital Display Driver Board
Signage, e-ink price tags, and segment-LED billboards often use the PIC18F2423-E/SP as a low-cost display controller. Its MSSP in SPI mode pumps pixel data to LED-driver shift registers at 10 MHz, while EUSART accepts commands from a host controller. The 16 KB Flash holds font tables for character displays, and 768 B RAM is enough for double-buffered seven-segment refresh at 100 Hz without flicker.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F2423-E/SP — 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 | PIC18F2420-E/SP | PIC18F2423-I/SP | PIC18F2523-I/SP | PIC18F2523-E/SP | PIC18F2420-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 16 KB Flash | 16 KB Flash | 16 KB Flash | 32 KB Flash | 32 KB Flash | 16 KB Flash |
| Data RAM | 768 bytes | 768 bytes | 768 bytes | 1536 bytes | 1536 bytes | 768 bytes |
| ADC | 10-bit, 10 ch | None | 10-bit, 10 ch | 10-bit, 10 ch | 10-bit, 10 ch | None |
| Maximum Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Temperature Range | -40 C to +125 C (E) | -40 C to +125 C (E) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +125 C (E) | -40 C to +85 C (I) |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
Bảo phân biệt quan trọng
- Integrated 10-bit ADC plus EUSART and MSSP in one 28-SPDIP MCU (vsPIC18F2420-E/SP)
- Extended -40 C to +125 C industrial/automotive temperature grade (vsPIC18F2423-I/SP)
- Pin-compatible upgrade path to 32 KB Flash via PIC18F2523 (vsPIC18F2523-I/SP)
Ghi chú thiết kế
Place a 100 nF X7R ceramic decoupling capacitor within 5 mm of the VDD pin (pin 20) and a bulk 10 uF tantalum or aluminum polymer capacitor on the same supply node. PIC18F2423-E/SP draws up to 11 mA active at 40 MHz; without local decoupling the digital supply can droop by 100 mV during PWM edges, which translates into 1 LSB of ADC error if AVdd shares the rail.
When using the ADC, route AVdd (pin 20) and AVss (pin 19) through a ferrite bead from VDD, and add a 10 uF + 100 nF decoupling pair right at AVdd. Without this filter, switching noise from the CCP/PWM outputs couples into the ADC reference and degrades effective resolution below the datasheet's 10-bit figure. Also disable the on-chip voltage regulator if the design runs from a regulated 5 V rail, to eliminate an internal 4 V LDO drop-out failure mode.
Keep the ICSP pins (RB6/PGC and RB7/PGD) accessible even on production boards - either expose a 6-pin ICSP header or route test pads - because field firmware updates depend on them. Also reserve RA6/RA7 for the primary oscillator when using an external crystal; routing fast-switching signals on those pins introduces jitter that fails USB-CDC timing compliance.
The PIC18F2423-E/SP in 28-SPDIP has a theta_JA of approximately 51 C/W in still air, so at 11 mA active from 5 V (55 mW) the junction rises about 2.8 C above ambient - negligible. Even at full 40 MHz operation the part never requires a heatsink, but derate clock frequency above +85 C to maintain oscillator stability across the extended temperature range.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page; PIC18F2423-E/SP is not AEC-Q100 qualified - for AEC-Q100 automotive choose PIC18F2423-I/SP automotive production parts only after explicit Microchip automotive-grade designation
