PIC18LF2523-I/SO - 8-bit PIC MCU, 32KB Flash, 28-SOIC | Microchip
MPN: PIC18LF2523-I/SO ✓ فعالPIC18LF2523-I/SO نمای کلی
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, RAM, peripherals, and I/O. The PIC18F family is Microchip's enhanced mid-range 8-bit architecture, positioned between the baseline PIC10/12/16 families and the 16-bit dsPIC/PIC24 families in the company's silicon portfolio. Compared to baseline PIC MCUs, PIC18 devices add 16-bit instructions, hardware multiply, C-compiler-optimized RISC architecture, and extended peripherals.
Key features of the PIC18LF2523-I/SO include 32KB self-programmable Flash program memory, 1536 bytes of SRAM, 256 bytes of data EEPROM, a 10-bit ADC with up to 12 channels, two analog comparators, two CCP modules, an Enhanced USART, MSSP (SPI/I2C) and a 25-I/O maximum count. Internal oscillator support spans 31 kHz to 8 MHz and up to 32 MHz with 4X PLL, removing the need for external crystals in cost-sensitive designs. The LF suffix indicates a wide VDD range of 2.0V–5.5V.
The PIC18LF2523-I/SO's technical depth comes from its RISC instruction set, hardware multiply, and Fail-Safe Clock Monitor that shuts down the controller safely if the primary clock stops. It is widely deployed in motor control, motor instrumentation, motor sensor interfacing, motor communication, and motor display driving applications. The 'LF' and 'F' variants differ only in voltage range; pinout and peripheral maps are identical, enabling firmware portability across the family.
Typical applications include industrial control nodes, sensor signal conditioning, low-power sensor hubs, USB-to-UART bridge MCUs, 3-phase motor control, and battery-powered measurement instruments. The internal oscillator and on-board EEPROM enable compact BOMs for these applications.
When designing with the PIC18LF2523-I/SO, ensure VDD decoupling with 100 nF ceramic capacitors placed within 5 mm of each supply pin. The ICSP pins (RB6/RB7) must be accessible for production programming and in-circuit debugging with tools such as MPLAB PICkit 5.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that are not found in the manufacturer datasheet alone.
جایگزین‌های drop-in برای PIC18LF2523-I/SO — 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 PIC18LF2523-I/SO (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در ADC, Package, Timers, I/O Pins, Core.
PIC18LF2520-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF2523T-I/SO
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18LF2423-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F2520-I/SO
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18LF2523-I/SO حداکثر مقادیر مجاز و مشخصات الکتریکی
| Product Family | PIC18F |
| Core | PIC 8-bit RISC |
| Core Size | 8-bit |
| CPU Speed (MIPS) | 10 MIPS |
| Max Clock Frequency | 40 MHz |
| Program Memory Type | Flash |
| Program Memory Size | 32 KB (16K x 16) |
| RAM Size | 1.5 KB (1536 bytes) |
| EEPROM Size | 256 bytes |
| I/O Count | 25 |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| ADC | 10-bit, up to 12 channels |
| محدوده دمای کاری | -40C to +85C (Industrial) |
| بسته‌بندی | 28-pin SOIC (SO) |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
پیکربندی پین PIC18LF2523-I/SO
| پین 1 | MCLR/RE3 — Master Clear (Reset) input or digital I/O |
| پین 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| پین 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| پین 4 | RA2/AN2/VREF- — PORTA bit 2 / Analog input 2 / ADC VREF- |
| پین 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| پین 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پین 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| پین 8 | VSS — Ground reference |
| پین 9 | OSC1/CLKIN — Crystal oscillator input / external clock |
| پین 10 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| پین 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| پین 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| پین 13 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| پین 14 | RC3/SCL/SCK — PORTC bit 3 / I2C clock / SPI clock |
| پین 15 | RC4/SDA/SDI — PORTC bit 4 / I2C data / SPI data in |
| پین 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| پین 17 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| پین 18 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| پین 19 | VSS — Ground reference |
| پین 20 | VDD — Positive supply voltage |
| پین 21 | RB0/INT0 — PORTB bit 0 / External interrupt 0 |
| پین 22 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| پین 23 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| پین 24 | RB3/INT3 — PORTB bit 3 / External interrupt 3 |
| پین 25 | RB4 — PORTB bit 4 |
| پین 26 | RB5/PGM — PORTB bit 5 / LVP programming |
| پین 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پین 28 | RB7/PGD — PORTB bit 7 / ICSP data |
کاربردهای معمول
PIC18LF2523-I/SO مناسب است برای 7 کاربردs: Industrial Sensor Interface, Battery-Powered IoT Sensor Node, Motor Control and BLDC Commutation, USB-to-UART Bridge Controller, Automotive Body Electronics (Non-Safety), Smart Metering and Data Logging, Consumer Appliance Control.
Industrial Sensor Interface
The PIC18LF2523-I/SO excels in industrial sensor interface applications with its 10-bit ADC supporting up to 12 channels and 2.0 V–5.5 V VDD range. Engineers typically pair it with 4-20 mA loop sensors, RTDs, or 0-10 V analog transducers, using Channel Scanning mode to multiplex readings without CPU intervention. Its 1536 bytes of SRAM buffers raw ADC data before averaging, while 256-byte EEPROM stores calibration coefficients persistently. The internal oscillator eliminates external crystals, reducing BOM cost in factory-floor deployments.
پیشنهادی
Battery-Powered IoT Sensor Node
The PIC18LF2523-I/SO is widely used in battery-powered IoT sensor nodes thanks to its 2.0 V–5.5 V VDD range, supporting single-cell Li-ion (3.6 V) or 2xAA battery packs without a boost regulator. Its internal 31 kHz–8 MHz oscillator and 4X PLL (up to 32 MHz) eliminate external crystals, saving PCB space and BOM cost. With low-power sleep modes and 256-byte EEPROM for non-volatile configuration storage, the MCU reliably wakes periodically to read sensors and transmit data via a companion BLE or LoRa module.
پیشنهادی
Motor Control and BLDC Commutation
The PIC18LF2523-I/SO drives small BLDC and stepper motors in low-power applications, leveraging two CCP modules for PWM generation and the Enhanced USART for position feedback. The 10 MIPS CPU performance at 40 MHz ensures deterministic commutation timing, while 1.5 KB of SRAM stores commutation tables and current-loop state variables. The wide VDD range supports both 3.3 V and 5 V motor driver rails, and the Fail-Safe Clock Monitor prevents erratic operation if the oscillator fails.
پیشنهادی
USB-to-UART Bridge Controller
The PIC18LF2523-I/SO serves as a USB-to-UART bridge controller in legacy peripheral upgrade modules, using the Enhanced USART for UART communication and MSSP for SPI/I2C peripheral bridging. Its 32 KB Flash hosts USB CDC stack and command interpreters, while 1536 bytes of SRAM buffer incoming/outgoing packets. Industrial temperature range (-40C to +85C) and wide VDD tolerance make it suitable for factory automation retrofit products.
پیشنهادی
Automotive Body Electronics (Non-Safety)
While not AEC-Q100 qualified, the PIC18LF2523-I/SO is deployed in non-safety automotive body electronics such as interior lighting, HVAC fan control, and seat position memory modules. Its -40C to +85C industrial temperature range covers cabin environments, and the 25-I/O count drives multiple loads directly via MOSFETs or relay drivers. The 256-byte EEPROM is ideal for storing user preferences such as seat position and climate settings.
پیشنهادی
Smart Metering and Data Logging
The PIC18LF2523-I/SO operates in smart metering and data logging endpoints, where its 10-bit ADC measures consumption pulses and 256-byte EEPROM stores tamper flags and rolling interval counters. The 1.5 KB of SRAM supports up to 768 16-bit samples before flush, while the internal oscillator and wide VDD range operate from lithium primary cells across multi-year deployments. The MSSP peripheral connects to EEPROM or FRAM expansion for higher-density logging.
پیشنهادی
Consumer Appliance Control
The PIC18LF2523-I/SO appears in white-goods control boards, driving user interface keypads, seven-segment or character LCDs, and triac-based heater/valve controls. Its 32 KB Flash hosts menu logic and safety state machines, while 1536 bytes of SRAM buffers display refresh data. The 2.0 V–5.5 V VDD supports both 3.3 V and 5 V board rails. Two CCP modules generate zero-crossing-switched PWM for proportional heating control with the Fail-Safe Clock Monitor ensuring safe shutdown on oscillator fault.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18LF2523-I/SO — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18LF2520-I/SO | PIC18LF2523T-I/SO | PIC18LF2423-I/SO | PIC18F2520-I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 32 KB |
| RAM Size | 1.5 KB | 1.5 KB | 1.5 KB | 0.75 KB | 1.5 KB |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.2 V to 5.5 V |
| Max Clock | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| I/O Count | 25 | 25 | 25 | 25 | 25 |
| ADC | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit, 12 ch | 10-bit, 12 ch |
| Internal Oscillator | 31 kHz–8 MHz + 4X PLL | 31 kHz–8 MHz + 4X PLL | 31 kHz–8 MHz + 4X PLL | 31 kHz–8 MHz + 4X PLL | 31 kHz–8 MHz + 4X PLL |
تفاوت‌های کلیدی
- Wide 2.0 V–5.5 V VDD range (در مقابلPIC18F2520-I/SO)
- Drop-in compatibility with 28-SOIC socket (در مقابلPIC18LF2423-I/SO)
- Fail-Safe Clock Monitor and internal 31 kHz–8 MHz oscillator (در مقابلPIC18LF2523T-I/SO)
یادداشت‌های طراحی
Place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD/VSS pair (pins 20/19 and 8). Add a bulk 10 uF tantalum or ceramic capacitor near the MCU supply rail to suppress voltage transients during CCP/PWM transitions. The LF variant's wide 2.0 V–5.5 V input means you can power directly from a 3.3 V LDO output, simplifying power tree design.
Reserve ICSP footprint access for RB6/PGC (pin 27) and RB7/PGD (pin 28), even in production designs. Route MCLR/RE3 (pin 1) with a 10 kohm pull-up and a 100 nF cap to ground for reliable in-circuit programming. If using LVP (Low-Voltage Programming), the PGM/RB5 pin (pin 26) requires a weak pull-down during reset.
Keep analog traces (RA0–RA5) short and away from digital switching lines (RC2/CCP1, oscillator pins) to minimize ADC noise coupling. Use a ground plane with separate analog and digital regions joined at a single point near the MCU VSS pin (pin 8 or 19). The AVdd/AVss pins on this 28-SOIC variant are internally bonded to VDD/VSS, so external filtering is not required.
Estimated: At 40 MHz (10 MIPS) the PIC18LF2523-I/SO draws up to ~15 mA active. With LF VDD minimum of 2.0 V, brown-out at 2.0 V is critical; configure BOR (Brown-Out Reset) in CONFIG2H register to prevent undefined-code latch corruption if VDD sags below 2.0 V during motor inrush events. Always erase CONFIG words via ICSP before re-flashing to clear stale fuses.
The internal 8 MHz oscillator is sufficient for UART up to ~250 kbps; for higher baud rates use the 4X PLL to reach 32 MHz or external crystal on OSC1/OSC2 (pins 9/10). Place any external crystal within 8 mm of pins 9/10 with short traces and a ground guard ring to minimize EMI pickup that can shift the effective frequency.
اطلاعات انطباق
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - select PIC18F2523-I/SO automotive variants for AEC-Q100 applications. Lead-free (Pb-free) per Microchip product family datasheet.
