PIC18F2525-I/SO - 8-Bit 40MHz MCU 48KB Flash 28-SOIC | Microchip
MPN: PIC18F2525-I/SO ✓ NakahandaPIC18F2525-I/SO Ulas
Background knowledge: an 8-bit microcontroller is a single-chip computer built around an 8-bit data path, prioritizing deterministic behavior, low power, and ease of programming. Within the broader hierarchy, the PIC18F2525 belongs to flash-based MCUs, then to microcontrollers, then to embedded processors, then to the wider category of integrated circuits (ICs). The PIC18 family uses a RISC-style modified Harvard architecture with single-cycle instruction execution, bridging legacy PIC16 simplicity and PIC24/dsPIC32 16-bit performance.
Key features include 48 KB of self-programmable flash with ICSP (In-Circuit Serial Programming), 3968 bytes of SRAM, a 10-bit ADC with up to 11 channels, two Capture/Compare/PWM modules, an Enhanced USART, MSSP for SPI and I²C, two analog comparators, and four timer modules. The instruction set is backward-compatible with the PIC16 family, easing migration from older designs and reducing firmware rewrite cost.
Architecturally, the PIC18F2525 uses a modified Harvard structure with separate program and data buses, a hardware 8x8 single-cycle multiplier, and a priority-enabled interrupt controller. The fail-safe clock monitor provides safe shutdown on external clock loss, while the nanoWatt technology delivers low-power idle and sleep modes for battery-aware designs.
Typical applications include industrial sensor interfaces, HVAC controllers, automotive body electronics (non-safety), low-speed USB device bridges (with PIC18F2550 migration path), and consumer appliance control panels. The 25-I/O budget supports mid-density panels with mixed analog and digital signals.
Design consideration: the wide-body SOIC-28 (/SO) has different PCB footprint than the narrow-body SOIC-28 (/SL), so PCB land patterns are not interchangeable. Designers should ensure that the ADC analog supply rail matches VDD within 0.3 V to avoid conversion errors.
This page synthesizes drop-in alternatives, parametric comparison, and practical design notes from the Microchip PIC18F2525 datasheet that are not always co-located on a single distributor page.
Mga alternatibo na pwedeng ilagay na PIC18F2525-I/SO — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok PIC18F2525-I/SO (parehas na form factor at footprint) — pagkakaiba sa Package, ADC, Communication Peripherals, Operating Temperature, Program Memory (Flash).
PIC18F2620-I/SO
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18LF2525-I/SO
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18F2525T-I/SO
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
PIC18F25K50-I/SO
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →PIC18F24K22-I/SO
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
PIC18F2525-I/SO Mga Pinakamataas na Rating at Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC18 (modified Harvard, RISC) |
| Program Memory (Flash) | 48 KB (24K x 16) |
| Data Memory (SRAM) | 3968 bytes |
| EEPROM Data Memory | 256 bytes |
| Maximum CPU Speed | 40 MHz (10 MIPS) |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 25 |
| ADC | 10-bit, up to 11 channels |
| Timers | 4 (Timer0/1/2/3) |
| Capture/Compare/PWM (CCP) | 2 modules |
| Serial Interfaces | EUSART, MSSP (SPI / I²C) |
| Analog Comparators | 2 |
| Temperature na Operasyon | -40 C to +85 C (Industrial grade) |
| Packhaging | 28-pin SOIC (SO) wide-body, 300-mil |
| Uri ng Pagpapasok | Surface Mount |
| Tindminan RoHS | Compliant |
| Programming Method | ICSP (In-Circuit Serial Programming) |
Pin Configuration ng PIC18F2525-I/SO
| Pin 1 | MCLR/RE3 — Master Clear (reset) input / digital input on PORTE |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog channel 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog channel 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog channel 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / analog channel 4 / SPI slave select |
| Pin 8 | VSS — Ground |
| Pin 9 | RA7/OSC1 — PORTA bit 7 / external oscillator input |
| Pin 10 | RA6/OSC2 — PORTA bit 6 / external oscillator output |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock |
| Pin 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| Pin 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / EUSART TX / clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / EUSART RX / data |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Positive supply |
| Pin 21 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| Pin 22 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| Pin 23 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| Pin 24 | RB3/CCP2 — PORTB bit 3 / CCP2 (alternate) |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5/PGM — PORTB bit 5 / ICSP programming LVP |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Tipikal na mga Gamit
PIC18F2525-I/SO ay nararapat para sa 7 aplikasyons: Industrial Sensor Interface Module, HVAC Building Controller, Consumer Appliance Control Panel, Automotive Body Electronics (Non-Safety), Low-Speed USB-UART Bridge (with Migration Path), Battery-Powered Data Logger, Educational Embedded Platform.
Industrial Sensor Interface Module
The PIC18F2525-I/SO is well suited to industrial sensor interface modules where 5 V analog signal conditioning is required. The 10-bit ADC with up to 11 input channels lets the MCU digitize multiple 4-20 mA loop or 0-10 V sensor signals simultaneously, while the 25 I/O pins accommodate address switches, status LEDs, and relay drivers. Its 40 MHz / 10 MIPS throughput provides deterministic sampling for rate-of-change calculations. The industrial -40 to +85 °C grade suits unconditioned factory-floor enclosures without active heating or cooling.
Inirekomenda
HVAC Building Controller
The PIC18F2525-I/SO fits HVAC building controllers that demand stable 5 V analog I/O and fieldbus capability. Two Capture/Compare/PWM modules drive triac control for fan and damper actuators directly, while the MSSP provides SPI or I²C connection to digital temperature, humidity, and CO2 sensors. The MSSP and EUSART together support Modbus RTU over RS-485 via an external transceiver. Industrial temperature grade and self-programmable flash enable in-field firmware updates without returning units to a service shop.
Inirekomenda
Consumer Appliance Control Panel
Consumer appliance control panels - washing machines, dishwashers, microwave ovens - benefit from the PIC18F2525-I/SO's 25 I/O lines, 10-bit ADC for water-level or temperature sensing, and PWM outputs for buzzer and motor-speed control. The ICSP (In-Circuit Serial Programming) lets manufacturers re-flash firmware on the assembly line without socketed parts. The 48 KB flash accommodates protocol stacks (e.g. simple LIN slaves) plus UI task scheduling for buttons and 7-segment displays.
Inirekomenda
Automotive Body Electronics (Non-Safety)
For non-safety automotive body modules - interior lighting, seat-position memory, power-mirror controllers - the PIC18F2525-I/SO provides the serial peripherals, ADC inputs, and PWM channels needed to drive MOSFET half-bridges and read position-feedback potentiometers. The industrial temperature grade of -40 to +85 °C covers in-cabin environments; designers targeting engine-bay or under-hood modules should instead choose an AEC-Q100-qualified PIC18 variant from Microchip's automotive catalog.
Inirekomenda
Low-Speed USB-UART Bridge (with Migration Path)
Although the PIC18F2525-I/SO lacks on-chip USB, it can serve as the UART-side companion to an external USB-to-UART chip, or designers can migrate to the pin-compatible PIC18F25K50 to add native USB 2.0 full-speed on the same SOIC-28 wide-body footprint. This makes the 2525 a useful stepping stone for prototypes that may or may not require USB, with the same PCB layout reused across both parts.
Inirekomenda
Battery-Powered Data Logger
Battery-powered data loggers benefit from the PIC18F2525-I/SO's nanoWatt technology low-power idle modes, which reduce current draw between sensor acquisitions. The 256-byte on-chip EEPROM offers 1M-cycle endurance for storing calibration tables and run-time counters, while the 10-bit ADC supports periodic temperature, voltage, or load-cell measurements. The wide 4.2-5.5 V supply accommodates 4xAA or 4xAAA cells with boost regulation downstream.
Inirekomenda
Educational Embedded Platform
The PIC18F2525-I/SO suits university and embedded-training boards because of its 25 accessible I/O pins, on-chip debug via ICD headers, and a large installed base of compilers and example projects (MPLAB X, XC8, MCC code configurator). Students can experiment with the ADC, PWM, and three serial peripherals without external peripherals, while the wide-body SOIC package is easy to hand-solder for breadboard prototyping with breakout adapters.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PIC18F2525-I/SO — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | PIC18F2620-I/SO | PIC18LF2525-I/SO | PIC18F2525T-I/SO | PIC18F25K50-I/SO | PIC18F24K22-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SOIC-28 (SO) wide-body 300-mil | SOIC-28 (SO) - same | SOIC-28 (SO) - same | SOIC-28 (SO) - same | SOIC-28 (SO) - same | SOIC-28 (SO) - same |
| Program Flash | 48 KB | 64 KB | 48 KB | 48 KB | 32 KB | 16 KB |
| SRAM | 3968 bytes | 3986 bytes | 3968 bytes | 3968 bytes | 2048 bytes | 2048 bytes |
| CPU Speed | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 40 MHz / 10 MIPS | 48 MHz / 12 MIPS | 64 MHz / 16 MIPS |
| Supply Voltage | 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 | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| USB | No | No | No | No | Yes (USB 2.0 FS) | No |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Pangunahing mga Pagkakaiba
- More flash while keeping same SOIC-28 wide-body footprint (kumpara saPIC18F2620-I/SO)
- Dual-voltage operation for 3.3 V system compatibility (kumpara saPIC18LF2525-I/SO)
- Native USB 2.0 Full-Speed on same footprint (kumpara saPIC18F25K50-I/SO)
Talaan ng Disenyo
Estimated: with VDD = 5.0 V, ADC configuration, 25 I/O active, CPU at 40 MHz, typical IDD is around 15-22 mA. Decouple VDD with a 100 nF ceramic cap placed within 5 mm of the VDD pin and a 10 uF bulk cap on the same rail. The AVDD/AVSS pins (if brought out on this package) should also be decoupled separately to minimize ADC reference noise during sample conversion.
Do NOT confuse the SO (300-mil wide-body SOIC-28) package land pattern with the SL (300-mil narrow-body SOIC-28) pattern. The /SO and /SL width footprints are different and require distinct PCB libraries. The 28-pin PDIP is the /P suffix and is also incompatible with SOIC footprints.
Place the ICSP test points (MCLR, VDD, VSS, PGC, PGD) along one edge of the PCB so a Microchip ICD or PICkit can probe without removing the device. Pull MCLR high through a 10 kohm resistor and a 100 nF disc for a typical hardware-reset circuit, plus the ICSP reset path.
When routing the SPI bus to RC3/RC4/RC5, keep each trace < 50 mm and add a 10 kohm pull-up on the SDA pin if using I²C. For high-speed EUSART (up to 1 Mbps), place 33 ohm series-termination resistors near the source, especially if the RX/TX nets are longer than 25 mm on the board.
Impormasyon ng Pagsunod sa Kautusan
RoHS-compliant per Microchip product page; the -I suffix indicates industrial -40 to +85 C temperature grade. Not AEC-Q100 qualified - use AEC-Q100 PIC18 automotive variants for safety applications. Halogen-free status not stated in the verified distributor pages.
