PIC18F2523-I/SP - 8-bit 32KB Flash MCU, 28-SPDIP | Microchip
MPN: PIC18F2523-I/SP ✓ Hoạt độngPIC18F2523-I/SP Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash/ROM), data memory (RAM), and peripherals such as ADCs, timers, and communication interfaces. The PIC18 family sits in Microchip's 8-bit PIC hierarchy: PIC18 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. PIC18 devices use a Harvard architecture with separate program and data buses, enabling single-cycle instruction execution and predictable interrupt latency.
Key features of the PIC18F2523 include 32KB Flash, 1536 bytes RAM, 256 bytes EEPROM, a 12-bit ADC (10 channels), two analog comparators, two CCP/ECCP modules, an enhanced USART, MSSP (SPI/I2C), two 8-bit timers plus three 16-bit timers, an internal 31 kHz to 8 MHz oscillator with 4x PLL (up to 32 MHz), and nanoWatt power-saving modes with a real-time clock.
The PIC18F2523 uses an enhanced RISC architecture with an 8x8 hardware multiplier and a C-compiler-optimized instruction set. The 4x PLL allows a low-frequency crystal to drive the device at full 40 MHz speed, reducing EMI. Fail-Safe Clock Monitor and Watchdog Timer provide robustness for industrial and automotive embedded systems.
Typical applications include industrial control panels, sensor signal conditioning, low-power data loggers, USB-interface accessories (using CCP and USART), and home appliance control boards. The 12-bit ADC is well-suited for battery monitoring and process-control feedback loops.
When designing with this part, ensure decoupling caps (100 nF) are placed within 5 mm of VDD pins, and unused I/O pins should be configured as outputs low to minimize current draw in nanoWatt sleep modes. The /SP suffix denotes the 28-pin SPDIP package, the most popular through-hole footprint for hobbyist and prototype boards.
This page synthesizes distributor pricing, drop-in alternatives sourced from Microchip's pin compatibility charts, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC18F2523-I/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 PIC18F2523-I/SP (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, ADC, Core, Timers.
PIC18F2523-E/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2520-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2423-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC18F2480-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2580-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC18F2523-I/SP Tỷ lệ tối đa & tính chất điện
| Core | PIC18 8-bit RISC |
| Tần số xung maksimum | 40 MHz (10 MIPS) |
| Program Memory (Flash) | 32 KB (16K x 16 words) |
| RAM | 1536 bytes |
| EEPROM | 256 bytes |
| I/O Pins | 25 |
| ADC | 12-bit, 10 channels |
| Operating Voltage | 2.0 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial grade, /I) |
| Hộp | 28-pin SPDIP (.300 inch) |
| Kiểu lắp đặt | Through-Hole |
| Timers | 2 x 8-bit, 3 x 16-bit |
| Communication | EUSART, MSSP (SPI/I2C) |
| PWM Channels | 2 CCP, 1 ECCP |
| Internal Oscillator | 31 kHz to 8 MHz, 4x PLL up to 32 MHz |
| Power-Saving Modes | nanoWatt (Idle, Sleep, Deep Sleep with RTCC) |
| Watchdog Timer | Yes, with separate oscillator |
| Instruction Set | PIC18 enhanced, 8x8 hardware multiplier |
| Trạng thái RoHS | Compliant |
| Tube Quantity | 15 per tube |
Cấu hình chân PIC18F2523-I/SP
| Chân 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage / digital input |
| Chân 2 | RA0/AN0 — Digital I/O / analog input channel 0 |
| Chân 3 | RA1/AN1 — Digital I/O / analog input channel 1 |
| Chân 4 | RA2/AN2/VREF- — Digital I/O / analog input channel 2 / ADC VREF- |
| Chân 5 | RA3/AN3/VREF+ — Digital I/O / analog input channel 3 / ADC VREF+ |
| Chân 6 | RA4/T0CKI/C1OUT — Digital I/O / Timer0 clock input / comparator 1 output |
| Chân 7 | RA5/AN4/C2OUT — Digital I/O / analog input channel 4 / comparator 2 output |
| Chân 8 | RA6/OSC2/CLKO — Digital I/O / oscillator output / clock output |
| Chân 9 | RA7/OSC1/CLKI — Digital I/O / oscillator input / clock input |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply voltage |
| Chân 12 | RB0/INT0 — Digital I/O / external interrupt 0 |
| Chân 13 | RB1/INT1 — Digital I/O / external interrupt 1 |
| Chân 14 | RB2/CANTX — Digital I/O / CAN TX (on PIC18F2480/2580 variants) |
| Chân 15 | RB3/CANRX — Digital I/O / CAN RX (on PIC18F2480/2580 variants) |
| Chân 16 | RB4 — Digital I/O / interrupt-on-change |
| Chân 17 | RB5 — Digital I/O / interrupt-on-change |
| Chân 18 | RB6/ICSPCLK — Digital I/O / ICSP clock (programming) |
| Chân 19 | RB7/ICSPDAT — Digital I/O / ICSP data (programming) |
| Chân 20 | VSS — Ground reference |
| Chân 21 | VDD — Positive supply voltage |
| Chân 22 | RC0/T1OSO — Digital I/O / Timer1 oscillator output |
| Chân 23 | RC1/T1OSI — Digital I/O / Timer1 oscillator input |
| Chân 24 | RC2/CCP1 — Digital I/O / CCP1 PWM output |
| Chân 25 | RC3/SCL — Digital I/O / I2C clock |
| Chân 26 | RC4/SDA — Digital I/O / I2C data |
| Chân 27 | RC5 — Digital I/O |
| Chân 28 | RC6/TX/CK — Digital I/O / EUSART TX / clock |
Ứng dụng tiêu biểu
PIC18F2523-I/SP phù hợp cho 7 Áp dụngs: Industrial Control Panels, Battery-Powered Data Loggers, Home Appliance Control Boards, Sensor Signal Conditioning Hubs, USB Interface Accessories (Low-Speed), Educational and Hobbyist Development Boards, Automotive Body Electronics (Non-Safety).
Industrial Control Panels
The PIC18F2523-I/SP fits industrial control panels because its 28-SPDIP through-hole footprint simplifies hand-prototyping and field replacement. The 12-bit ADC with 10 channels acquires multiple sensor inputs (temperature, pressure, current) at 100 ksps, while 32 KB Flash holds complete Modbus or CANopen state machines. The 2.0V-5.5V range and 25 mA I/O sink/source support 24V-derived 5V rails through simple regulators. The nanoWatt sleep mode drops quiescent current below 1 uA for battery-backed panels.
Được đề xuất
Battery-Powered Data Loggers
The PIC18F2523-I/SP suits battery-powered data loggers due to its nanoWatt power management with deep-sleep RTCC drawing less than 1 uA, plus 256 bytes of EEPROM for non-volatile configuration storage. The 12-bit ADC provides higher resolution per sample, reducing quantization noise in temperature and voltage measurements. The internal 31 kHz-8 MHz oscillator eliminates external crystals, reducing BOM and quiescent drain. With a 3V coin cell, the MCU can sustain multi-year logging intervals with 5-minute wake cycles.
Được đề xuất
Home Appliance Control Boards
The PIC18F2523-I/SP is well-suited for home appliance control boards (washing machines, dishwashers, HVAC thermostats) where 25 I/O pins drive relays, triacs, and switches while the 12-bit ADC reads thermistor and current-sense signals. Enhanced Flash self-programming enables field firmware updates via the appliance's existing user interface. The CCP/ECCP modules generate zero-cross triac triggers or PWM fan/valve control. Industrial temperature grade (-40 C to +85 C) covers kitchen and laundry environments.
Được đề xuất
Sensor Signal Conditioning Hubs
For multi-signal sensor hubs in HVAC and process control, the PIC18F2523-I/SP's 10-channel 12-bit ADC aggregates thermocouples, RTDs, 4-20 mA loops, and voltage dividers. The EUSART provides RS-232/485 comms to a central PLC, while MSSP (SPI/I2C) interfaces digital sensors. The 1536-byte RAM holds buffer data for averaging and thresholding. Watchdog Timer with separate oscillator ensures recovery from sensor-induced firmware lockups in electrically noisy industrial settings.
Được đề xuất
USB Interface Accessories (Low-Speed)
The PIC18F2523-I/SP can implement low-speed USB accessory firmware using the MSSP and EUSART plus external USB transceiver chips, or via bit-banged software USB on I/O pins. Although the PIC18F2523 lacks native USB, designers can use it as a co-MCU paired with a dedicated USB interface IC like the MCP2200 or MCP2221A for CDC serial emulation. The 32 KB Flash comfortably holds CDC, HID, or vendor-class stacks for HID-class peripherals such as keyboards, mice, or industrial input devices.
Được đề xuất
Educational and Hobbyist Development Boards
The PIC18F2523-I/SP is a popular choice for educational and hobbyist boards due to its 28-SPDIP through-hole package, which seats in standard breadboards and ZIF sockets for easy replacement. MPLAB X IDE, XC8 compiler, and PICkit 5 debugger support the device fully, with free C compilers and Microchip's code configurator. The 32 KB Flash accommodates complete projects; ICSP programming via RB6/RB7/MCLR avoids removing the MCU for reprogramming. Many open-source compilers and frameworks target the PIC18F2523.
Được đề xuất
Automotive Body Electronics (Non-Safety)
The PIC18F2523-I/SP supports non-safety automotive body electronics such as interior lighting controllers, seat control modules, mirror adjusters, and HVAC blend-door actuators. Its 2.0V-5.5V input tolerates 12V battery transients through external regulation; for harsher environments use the PIC18F2523-E/SP variant rated -40 C to +125 C. The EUSART supports LIN bus via external LIN transceivers such as MCP2021A. The 12-bit ADC accurately senses potentiometers and thermistors used in seat position and climate control.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC18F2523-I/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 | PIC18F2523-E/SP | PIC18F2520-I/SP | PIC18F2423-I/SP | PIC18F2480-I/SP | PIC18F2580-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 (Flash) | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB | 32 KB |
| RAM | 1536 bytes | 1536 bytes | 1536 bytes | 768 bytes | 768 bytes | 1536 bytes |
| ADC Resolution | 12-bit | 12-bit | 10-bit | 12-bit | 8-channel, 10-bit | 8-channel, 10-bit |
| CAN Peripheral | No | No | No | No | Yes (CAN 2.0B) | Yes (CAN 2.0B) |
| Operating Temperature | -40 C to +85 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Unit Price @ 100 pcs (USD) | 5.05 | 5.85 | 4.75 | 4.50 | 5.40 | 5.95 |
Bảo phân biệt quan trọng
- 12-bit ADC with 10 channels vs PIC18F2520's 10-bit ADC (vsPIC18F2520-I/SP)
- Industrial temperature grade with extended variant for automotive (vsPIC18F2523-E/SP)
- Native 12-bit ADC across the PIC18F2523 family (vsPIC18F2480-I/SP)
Ghi chú thiết kế
Estimated: at 40 MHz with VDD = 5.0 V, typical I_DD is approximately 12 mA (per datasheet typical characteristics). Add a 100 nF decoupling capacitor within 5 mm of each VDD pin (pins 11 and 21) and a bulk 10 uF tantalum at the regulator output. For battery applications, use Sleep mode (CPU off, peripherals off) which drops current below 1 uA per the nanoWatt spec, and wake via Watchdog Timer or external interrupt.
Place the 28-SPDIP socket (if used) oriented with pin 1 notch at the top-left. Keep the ICSP header (5-pin) near pins 1 (MCLR), 18 (ICSPCLK), and 19 (ICSPDAT) to minimize programming trace length. For the 28-SPDIP, leave at least 0.1 inch clearance between the IC body and surrounding tall components for clip-on programming. Analog inputs (RA0-RA5) should be routed with guard rings if high-impedance sources connect to them.
Critical pitfalls: (1) The MCLR pin (pin 1) MUST be pulled high through a 10 kohm resistor and have a 100 nF cap to VDD for proper reset; floating MCLR causes sporadic resets. (2) Unused I/O pins MUST be configured as outputs low to minimize current draw in Sleep mode; inputs float and draw transition current. (3) The 12-bit ADC requires acquisition time based on source impedance - use Tacq >= 2.4 us for 10 kohm sources or longer for higher impedances. (4) In-Circuit Serial Programming requires no capacitor on PGD/PGC (RB7/RB6) above ~100 pF.
For the MSSP used as I2C, install 2.2 kohm-10 kohm pull-up resistors on SDA (RC4) and SCL (RC3) for 400 kHz Fast Mode; weaker pull-ups cause clock stretching and missing start/stop bits. For SPI master mode, route SCK, SDI, SDO as parallel traces under 50 mm with ground guard on each side; long SPI traces pick up motor switching noise in appliance boards. The EUSART at high baud rates (e.g., 115200) requires the baud-rate generator error to stay below +/-2 percent - verify with the Microchip baud-rate calculator.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. The PIC18F2523-I/SP is industrial-grade (-40 C to +85 C) and not AEC-Q100 qualified; for automotive applications use the PIC18F2523-E/SP extended-temperature variant (still no AEC-Q100 letter, but rated for -40 C to +125 C).
