PIC18F4423-E/PT - 8-Bit 40MHz 16KB Flash MCU 44-TQFP | Microchip
MPN: PIC18F4423-E/PT ✓ فعالPIC18F4423-E/PT نمای کلی
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash), data memory (RAM), and peripherals (I/O, timers, ADC, communication interfaces) on one die. Within the broader taxonomy, the PIC18F4423 belongs to the RISC MCU family -> 8-bit MCU -> general-purpose microcontroller -> embedded control IC. The PIC18 family uses an enhanced Harvard RISC architecture with 16-bit instructions and 8-bit data paths, sitting above baseline PIC10/12/16 families in performance and below PIC24/dsPIC/PIC32 in raw throughput.
Key features include 36 digital I/O lines, 13 ADC channels (10-bit), two analog comparators, two CCP/ECCP modules, two USART modules, MSSP (SPI/I2C), an Enhanced Capture/Compare/PWM peripheral, and nanoWatt Technology dynamic power-management modes. The integrated ICSP (In-Circuit Serial Programming) and ICD (In-Circuit Debug) interfaces allow field upgrades and real-time debug via standard Microchip tools (MPLAB X, PICkit, ICD). The 40 MHz maximum clock delivers 10 MIPS, with 200 ns instruction cycle, while nanoWatt modes (Sleep, Idle, RC_RUN, etc.) cut quiescent current for battery applications.
The PIC18F4423 uses a modified Harvard architecture with separate program and data buses, plus a 31-level hardware stack, 75 instructions (83 with extended instruction set), and an internal 8 MHz / 32 kHz oscillator block. The 16 KB flash supports self-programming under firmware control (bootloader capability), and the 256-byte data EEPROM simplifies parameter storage.
Typical applications include industrial control systems, automotive body electronics (the -E suffix denotes the -40C to +125C extended temperature grade suitable for underhood and industrial environments), consumer appliances, sensor signal conditioning, and low-power remote sensor nodes. With 36 I/O and 13 ADC channels, it can directly interface to keypad matrices, multiple sensors, and bridges.
When designing, ensure the 4.2 V to 5.5 V supply rail is well-decoupled with 100 nF + 10 uF ceramic near the VDD pins. For low-power modes, carefully manage oscillator wake-up timing. The -E/PT part is the extended-temperature variant in the TQFP package; the -I/PT variant supports only -40C to +85C.
This page consolidates distributor pricing, parametric drop-in alternatives from the PIC18F family, and practical design notes not found on a single manufacturer datasheet page.
جایگزین‌های drop-in برای PIC18F4423-E/PT — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای PIC18F4423-E/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, ADC, Program Memory (Flash), Operating Temperature, EEPROM.
PIC18F4423-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F4523-E/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F4420-E/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4320-E/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4620-E/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4423-E/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC18F |
| CPU Core | PIC18 (Enhanced Harvard RISC, 8-bit data, 16-bit instructions) |
| Max CPU Clock | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 16 KB (8K x 16) |
| Data SRAM | 768 bytes |
| Data EEPROM | 256 bytes |
| I/O Pins | 36 |
| ADC | 10-bit, 13 channels |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| دمای کاری | -40C to +125C (Extended, -E suffix) |
| بسته‌بندی | 44-pin TQFP (10x10 mm) |
| نوع نصب | Surface Mount |
| Communication | 2x USART, 1x MSSP (SPI/I2C) |
| Timers | 4 (Timer0/1/2/3) |
| CCP / ECCP | 2 (1x CCP, 1x ECCP) |
| Comparators | 2 analog comparators |
| Power-Saving Modes | nanoWatt Technology (Sleep, Idle, RC_RUN, etc.) |
| Programming / Debug | ICSP + ICD (2-wire) |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC18F4423-E/PT
| پین 1 | MCLR — Master Clear (Reset) input, programming voltage input |
| پین 2 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| پین 3 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| پین 4 | RA2/AN2/VREF-/CVREF — Digital I/O / Analog input 2 / DAC reference / comparator VREF- |
| پین 5 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| پین 6 | RA4/T0CKI/C1OUT — Digital I/O / Timer0 clock input / Comparator 1 output |
| پین 7 | RA5/AN4/SS/HLVDIN/C2OUT — Digital I/O / Analog input 4 / SPI Slave Select / HLVD input / Comparator 2 output |
| پین 8 | OSC1/CLKIN/RA7 — Crystal oscillator input / external clock / digital I/O |
| پین 9 | OSC2/CLKOUT/RA6 — Crystal oscillator output / clock out / digital I/O |
| پین 10 | RC0/T1OSO/T1CKI — Digital I/O / Timer1 oscillator output / Timer1 clock input |
| پین 11 | RC1/T1OSI/CCP2 — Digital I/O / Timer1 oscillator input / CCP2 PWM output |
| پین 12 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| پین 13 | RC3/SCK/SCL — Digital I/O / MSSP SPI clock / I2C clock |
| پین 14 | RC4/SDI/SDA — Digital I/O / MSSP SPI data in / I2C data |
| پین 15 | RC5/SDO — Digital I/O / MSSP SPI data out |
| پین 16 | RC6/TX/CK — Digital I/O / USART async transmit / sync clock |
| پین 17 | RC7/RX/DT — Digital I/O / USART async receive / sync data |
| پین 18 | VSS — Digital ground reference |
| پین 19 | VDD — Positive digital supply (4.2 V to 5.5 V) |
| پین 20 | RB0/INT0/FLT0/AN12 — Digital I/O / External interrupt 0 / ECCP fault input / Analog input 12 |
| پین 21 | RB1/INT1/AN10 — Digital I/O / External interrupt 1 / Analog input 10 |
| پین 22 | RB2/INT2/AN8 — Digital I/O / External interrupt 2 / Analog input 8 |
| پین 23 | RB3/AN9/CCP2 — Digital I/O / Analog input 9 / CCP2 alternate output |
| پین 24 | RB4/AN11/KBI0 — Digital I/O / Analog input 11 / interrupt-on-change |
| پین 25 | RB5/KBI1/PGM — Digital I/O / interrupt-on-change / LVP programming |
| پین 26 | RB6/KBI2/PGC — Digital I/O / interrupt-on-change / ICD clock |
| پین 27 | RB7/KBI3/PGD — Digital I/O / interrupt-on-change / ICD data |
| پین 28 | VDD — Positive digital supply (4.2 V to 5.5 V) |
| پین 29 | VSS — Digital ground reference |
| پین 30 | RD0/PSP0/C1IN+ — Digital I/O / Parallel Slave Port bit 0 / Comparator 1 non-inverting |
| پین 31 | RD1/PSP1/C1IN- — Digital I/O / PSP bit 1 / Comparator 1 inverting |
| پین 32 | RD2/PSP2/C2IN+ — Digital I/O / PSP bit 2 / Comparator 2 non-inverting |
| پین 33 | RD3/PSP3/C2IN- — Digital I/O / PSP bit 3 / Comparator 2 inverting |
| پین 34 | RC4/PSP4/SDI/SDA — Digital I/O / PSP bit 4 / MSSP secondary |
| پین 35 | RC5/PSP5/SDO — Digital I/O / PSP bit 5 / MSSP secondary |
| پین 36 | RC6/PSP6/TX/CK — Digital I/O / PSP bit 6 / USART secondary |
| پین 37 | RC7/PSP7/RX/DT — Digital I/O / PSP bit 7 / USART secondary |
| پین 38 | AVSS — Analog ground reference |
| پین 39 | AVDD — Analog positive supply |
| پین 40 | RE0/RD/AN5 — Digital I/O / Parallel port read / Analog input 5 |
| پین 41 | RE1/WR/AN6 — Digital I/O / Parallel port write / Analog input 6 |
| پین 42 | RE2/CS/AN7 — Digital I/O / Parallel port chip select / Analog input 7 |
| پین 43 | VDD — Positive digital supply (4.2 V to 5.5 V) |
| پین 44 | VSS — Digital ground reference |
کاربردهای معمول
PIC18F4423-E/PT مناسب است برای 6 کاربردs: Industrial Process Control, Automotive Body Electronics, Consumer Appliance Control, Battery-Powered Sensor Nodes, Educational / Prototyping Platforms, Smart Energy Metering.
Industrial Process Control
The PIC18F4423-E/PT's -40C to +125C extended temperature rating, 36 I/O, and 10-bit ADC make it well-suited for industrial process controllers that must survive harsh factory-floor environments with motor drives, solenoids, and sensor conditioning. Its 40 MHz CPU delivers 10 MIPS throughput that easily handles PID loops, MODBUS RTU polling over USART, and graphical LCD refresh tasks. Compared with switching regulator rails, the nanoWatt idle modes keep standby power below 50 uA - useful for battery-backed plant sensors. Pair it with external op-amps (e.g. MCP6002) for 4-20 mA current-loop analog front-ends, and use the MSSP SPI/I2C bus to communicate with isolated digital isolators.
پیشنهادی
Automotive Body Electronics
The PIC18F4423-E/PT operates reliably at underhood and cabin temperatures up to 125C, making it a strong choice for body controllers, HVAC damper actuators, seat control modules, and dashboard instrument clusters. The 13-channel 10-bit ADC reads thermistors, potentiometers, and switch contacts directly; the 2x CCP/ECCP modules generate PWM signals for DC motor speed control and LED dimming; the 2x USART interfaces to LIN or CAN transceivers for body-network communication. With 16 KB flash and ICSP self-programming, firmware can be updated over the vehicle diagnostic bus without removing the ECU. Compared to 5V-only legacy PIC16 controllers, the PIC18F4423's enhanced instruction set and 31-level hardware stack simplify state-machine design.
پیشنهادی
Consumer Appliance Control
For washing machines, dishwashers, microwave ovens, and induction cooktops, the PIC18F4423-E/PT offers the right balance of analog integration, PWM channels, and extended temperature tolerance. The ECCP module generates complementary PWM outputs for induction heating or soft-start motor control; the 10-bit ADC reads water level, temperature, and current sensors; and the nanoWatt idle mode keeps standby power below the 1 W Energy Star limit. With 16 KB flash the device can host capacitive-touch firmware, rotary-encoder debouncing, and serial inverter bus interfaces. Compared to a discrete 8051 design, the integrated peripherals shrink the BOM by 5-8 components and simplify the EMC layout.
پیشنهادی
Battery-Powered Sensor Nodes
The PIC18F4423-E/PT's nanoWatt Technology enables sub-1 uA Sleep currents, allowing multi-year battery life in remote sensor applications such as wireless thermostats, agricultural soil monitors, and HVAC damper actuators. The 10-bit ADC wakes the MCU on analog threshold crossings via the interrupt-on-change module, eliminating the need for a separate analog comparator IC. With 16 KB flash the MCU can hold a Zigbee/MQTT-SN protocol stack, encryption keys, and sensor-fusion firmware. Compared to using a 32-bit ARM Cortex-M0+ part, the PIC18F4423 is approximately 40% lower quiescent current at the cost of slower MIPS throughput.
پیشنهادی
Educational / Prototyping Platforms
With its in-circuit debug capability (ICD via ICSP), 16 KB flash, and 36 I/O, the PIC18F4423-E/PT is well-suited for university embedded-systems courses, hobbyist robotics, and breadboard prototyping. The Microchip MPLAB X IDE, XC8 compiler, and PICkit 5 programmer/debugger provide a free toolchain that integrates simulation and debug. The PIC18 instruction set is documented in tutorials and books, making the learning curve manageable for beginners. The -E/PT's TQFP package, however, requires careful hand-soldering for breadboard use; the PDIP-40 (PIC18F4423-E/P) variant is friendlier for solderless breadboards.
پیشنهادی
Smart Energy Metering
Single-phase electricity meters, water-meter AMR modules, and gas-meter data loggers can leverage the PIC18F4423-E/PT's 10-bit ADC to sample current/voltage channels with sufficient resolution for class-1 metering accuracy after calibration. The 13 ADC channels accommodate multiple sensor bridges (temperature, tamper switches, metrology IC outputs), while the 2x USART supports optical IEC 62056-21 ports and M-Bus or wireless M-Bus modules. With 16 KB flash the MCU can hold DLMS/COSEM protocol stacks and firmware upgrade routines. The extended -40C to +125C temperature grade is essential for outdoor meter installations. Compared with dedicated metrology ICs, this approach trades precision for BOM cost in sub-class-1 metering applications.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F4423-E/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18F4423-I/PT | PIC18F4523-E/PT | PIC18F4420-E/PT | PIC18F4320-E/PT | PIC18F4620-E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same | TQFP-44 (10x10 mm) - same |
| Program Flash | 16 KB | 16 KB | 32 KB | 16 KB | 8 KB | 64 KB |
| Data SRAM | 768 bytes | 768 bytes | 1536 bytes | 768 bytes | 512 bytes | 3968 bytes |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 8-bit | 10-bit | 10-bit |
| Max CPU Clock | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Temperature | -40C to +125C (Extended) | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +125C (Extended) |
| I/O Pins | 36 | 36 | 36 | 36 | 36 | 36 |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
تفاوت‌های کلیدی
- Extended temperature grade (-40C to +125C) (در مقابلPIC18F4423-I/PT)
- 10-bit ADC precision versus 8-bit alternative (در مقابلPIC18F4420-E/PT)
- 16 KB flash balances code headroom and die cost (در مقابلPIC18F4320-E/PT)
یادداشت‌های طراحی
The PIC18F4423-E/PT requires a tightly regulated 4.2 V to 5.5 V supply rail; place a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin (pins 19, 28, 43) and a single 10 uF tantalum or ceramic bulk capacitor near the MCU's VDD/VSS pair. Connect all VDD pins together and all VSS pins together with wide, short traces on the PCB. The AVDD/AVSS pair (pins 38, 39) should be supplied from a separate, low-noise filtered branch - use a ferrite bead or small RC filter to isolate analog supply noise from digital switching. Estimated: at 40 MHz the MCU draws ~10-15 mA active; in Sleep mode ~1 uA. NanoWatt mode leakage dominates in battery applications, so choose a low-leakage LDO such as MCP1700 for the analog branch.
Route the crystal traces (OSC1/OSC2, pins 8/9) with short, symmetric traces no longer than 5 mm, and surround them with a ground pour on both sides of the PCB to minimize EMI. For HS-mode crystals (>=20 MHz), use a ground guard ring. The ICSP pins (RB6/PGC, RB7/PGD) should be brought out to a 0.1-inch header for in-circuit debugging - Microchip PICkit 5 connects directly to these pins via a 5-pin RJ-12 jack. Avoid routing high-speed signals (PWM, USART) directly adjacent to the analog ADC inputs (AN0-AN12) to prevent digital-to-analog crosstalk. Estimated: for 16 KB flash firmware debug, the ICSP header reduces prototype rework time by ~30%.
Do not exceed the absolute maximum VDD of 7.0 V or apply voltages below VSS to any I/O pin - both will damage the MCU. The -E/PT variant operates from 4.2 V to 5.5 V; if your design uses a 3.3 V supply, choose PIC18F4423-I/PT or PIC18F25K22 instead. The MCLR pin (pin 1) must be pulled up to VDD through a 10 kohm resistor; leaving it floating can cause spurious resets. When using the ADC, allow at least 2.4 us acquisition time (TAD = 1.6 us) between channel-switch and conversion-start; sampling too fast produces non-monotonic ADC output. The internal bandgap reference must be enabled by software (CVRCON register) before using it as ADC VREF.
اطلاعات انطباق
RoHS and REACH compliant per Microchip product page. The -E temperature grade is industrial, not AEC-Q100 automotive-qualified; for AEC-Q100 use PIC18F46K80-E/PT or PIC18F46K22-E/PT family members.