PIC18F2520-E/SO - 8-bit 25MHz 32KB Flash MCU 28-SOIC | Microchip
MPN： PIC18F2520-E/SO ✓ 啟用中PIC18F2520-E/SO 概覽
A PIC18F microcontroller is an enhanced 8-bit Harvard-architecture RISC core in Microchip's PIC18 family. The PIC18F series adds 16-bit wide instructions and a linear program-memory space on top of the legacy PIC16 architecture, while preserving byte-oriented register access. This particular part targets cost-sensitive embedded control applications that need more program space, more I/O, and richer peripherals than the PIC16F family, without moving to a 16-bit MCU. It sits inside the broader microcontroller hierarchy as: 8-bit MCU -> PIC18 family -> PIC18F2xxx sub-family (28-40-44-pin devices) -> PIC18F2520 specifically.
Key differentiating features include 10-bit analog-to-digital conversion (ADC) with up to 10 input channels, nanoWatt Technology power management for reduced active and sleep currents, an enhanced addressable USART, MSSP serial port supporting SPI and I2C (master/slave), capture/compare/PWM (CCP) modules, and 25 I/O pins with individual pull-up control. The on-chip debug (ICD) capability and self-programmability make field firmware updates possible without an external programmer.
Architecturally, the device uses a 16-bit wide instruction set with an 8-bit data path, a 31-level hardware stack, and a priority-level interrupt controller. nanoWatt Technology adds multiple low-power modes (Run, Idle, Sleep and several oscillator-tunable variants), allowing the designer to trade CPU throughput for current consumption in battery-powered nodes.
Typical applications include industrial control and sensor-interface modules, home-automation and building-control nodes, low-cost motor-control signal chains, USB HID bridges (when paired with the PIC18F2550/4550 variant), embedded data acquisition, and consumer appliances requiring reliable 5 V CMOS logic. The PIC18F2520-E/SO is the "E" (Extended) temperature grade variant rated for -40 to +125 C, suitable for industrial environments.
When designing with this part, select decoupling per Microchip's PIC18F2520 datasheet, observe VDD/VSS analog and digital pin separation, and use the MPLAB XC8 compiler with the PIC18 configuration-bit pragma to lock oscillator, watchdog and brown-out behavior at build time.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for engineers evaluating the PIC18F2520-E/SO in production designs.
直接替換替代品，適用於 PIC18F2520-E/SO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC18F2520-E/SO （相同外形與佔位） — 差異在於 Operating Temperature, Package, ADC, Communication Peripherals, Core.
PIC18F2520-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F2520T-E/SO
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F2525-E/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F2420-E/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F2523-E/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F25K20-I/SO
✅ 直接替換聯絡詢價
查看資料表 →PIC18F2520-E/SO 最大額定值與電氣特性
| Core Architecture | PIC18 (8-bit Harvard RISC) |
| Program Memory (Flash) | 32 KB (16K x 16) |
| RAM | 1.5 KB (3968 bytes) |
| CPU Clock Speed | 25 MHz (max CPU clock) |
| Oscillator Input | 40 MHz (max, 10 MIPS) |
| ADC | 10-bit, up to 10 channels |
| I/O Pins | 25 |
| Communication Peripherals | EUSART, MSSP (SPI / I2C master-slave) |
| CCP/PWM Modules | Capture/Compare/PWM (CCP) |
| Supply Voltage (VDD) | 4.2 V to 5.5 V (typical 5 V) |
| 工作溫度 | -40 C to +125 C (Extended grade) |
| 封裝 | 28-pin SOIC (0.295", 7.50 mm width) |
| 安裝類型 | Surface Mount |
| Power Saving | nanoWatt Technology (Run / Idle / Sleep modes) |
| In-Circuit Debug | ICD / ICSP self-programming |
| RoHS 狀態 | Compliant |
PIC18F2520-E/SO 腳位配置
| 腳位 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| 腳位 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| 腳位 3 | RA2/AN2/VREF- — Digital I/O / Analog input 2 / ADC VREF- |
| 腳位 4 | RA3/AN3/VREF+ — Digital I/O / Analog input 3 / ADC VREF+ |
| 腳位 5 | RA4/T0CKI/C1OUT — Digital I/O / Timer0 clock input / Comparator 1 output |
| 腳位 6 | RA5/AN4/SS/HLVDIN — Digital I/O / Analog input 4 / SPI slave select / High/Low Voltage Detect input |
| 腳位 7 | VSS — Ground reference |
| 腳位 8 | RA7/OSC1/CLKI — Digital I/O / Oscillator crystal input / External clock input |
| 腳位 9 | RA6/OSC2/CLKO — Digital I/O / Oscillator crystal output / Clock output |
| 腳位 10 | RC0/T1CKI/T3CKI — Digital I/O / Timer1 clock / Timer3 clock |
| 腳位 11 | RC1/CCP2 — Digital I/O / Capture/Compare/PWM 2 |
| 腳位 12 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| 腳位 13 | RC3/SCK/SCL — Digital I/O / MSSP SPI clock / I2C clock |
| 腳位 14 | RC4/SDI/SDA — Digital I/O / MSSP SPI data in / I2C data |
| 腳位 15 | RC5/SDO — Digital I/O / MSSP SPI data out |
| 腳位 16 | RC6/TX/CK — Digital I/O / EUSART async transmit / sync clock |
| 腳位 17 | RC7/RX/DT — Digital I/O / EUSART async receive / sync data |
| 腳位 18 | VSS — Ground reference |
| 腳位 19 | VDD — Positive supply (4.2V to 5.5V) |
| 腳位 20 | RB0/INT0/FLT0 — Digital I/O / External interrupt 0 / PWM fault input |
| 腳位 21 | RB1/INT1 — Digital I/O / External interrupt 1 |
| 腳位 22 | RB2/INT2/CTEDS — Digital I/O / External interrupt 2 / CTMU edge select |
| 腳位 23 | RB3/CTED1/CCP2 — Digital I/O / CTMU edge 1 / CCP2 alt |
| 腳位 24 | RB4/KBI0 — Digital I/O / Interrupt-on-change KBI0 |
| 腳位 25 | RB5/KBI1/PGM — Digital I/O / Interrupt-on-change KBI1 / LVP programming |
| 腳位 26 | RB6/KBI2/PGC — Digital I/O / Interrupt-on-change KBI2 / ICD clock |
| 腳位 27 | RB7/KBI3/PGD — Digital I/O / Interrupt-on-change KBI3 / ICD data |
| 腳位 28 | VDD — Positive supply (4.2V to 5.5V) |
典型應用
PIC18F2520-E/SO 適用於 6 應用s: Industrial Sensor Interface Module, Home Automation / Building Control Node, Low-Cost Motor Control Signal Chain, Consumer Appliance User Interface Board, USB HID / CDC Bridge (PIC18F2550 Family Companion), Embedded Data Acquisition Front-End.
Industrial Sensor Interface Module
The Microchip PIC18F2520-E/SO is well matched to industrial 4-20 mA / 0-10 V sensor-interface modules because it integrates a 10-bit ADC with up to 10 input channels in a 28-SOIC footprint. With 32 KB flash and 1.5 KB RAM, the part runs basic Modbus RTU slave firmware or a simple proprietary polling protocol without needing external memory; the EUSART handles the RS-485 link directly via an external transceiver. The -40 C to +125 C extended grade ensures operation inside sealed IP65 enclosures near motors or heaters. nanoWatt Technology sleep currents drop to <1 uA in Sleep, enabling loop-powered designs that idle between measurements.
推薦
Home Automation / Building Control Node
For building-automation nodes (lighting, blinds, HVAC dampers), the PIC18F2520-E/SO offers 25 I/O pins and PWM outputs to drive relays or triac optocouplers without external logic. The 25 MHz CPU and 32 KB flash comfortably execute a Modbus or BACnet MS/TP slave stack. nanoWatt Technology idle/sleep modes let the node consume <2 mA average while polling the bus. The 28-SOIC package fits standard 1-inch-square control modules; the Extended -40 C to +125 C grade covers unheated equipment closets.
推薦
Low-Cost Motor Control Signal Chain
The PIC18F2520-E/SO CCP modules generate complementary PWM to drive small BLDC or brushed DC motor pre-drivers in a 28-SOIC compact board. With 25 MIPS CPU throughput the firmware can run a sensorless BEMF zero-crossing detection loop at 10 kHz PWM rate while servicing the ADC for current sensing. The MSSP SPI port links to a gate-driver such as the MCP8021 or to a digital potentiometer for closed-loop speed control. nanoWatt sleep keeps the standby current below 1 uA when the motor is parked.
推薦
Consumer Appliance User Interface Board
Inside a white-good user-interface board (washing machine, microwave, dishwasher), the PIC18F2520-E/SO drives 7-segment LED displays, matrix keypads, and rotary encoders from its 25 I/O pins. The MSSP SPI port connects to an SPI OLED or segment driver; the EUSART serves a service-port diagnostic link to the main control board. With 32 KB flash, manufacturers can ship multiple firmware variants (regional, OEM) on the same hardware platform with self-programmable ICSP field updates.
推薦
USB HID / CDC Bridge (PIC18F2550 Family Companion)
Although the PIC18F2520-E/SO itself lacks an internal USB peripheral, designers frequently use it alongside the PIC18F2550 in two-MCU bridges where the PIC18F2550 handles the USB physical layer and the PIC18F2520-E/SO runs the application logic. With 25 MIPS throughput and 32 KB flash, the PIC18F2520-E/SO can preprocess sensor data or run a HID report-mapping algorithm and exchange data with the USB MCU over EUSART. The 28-SOIC surface-mount package keeps the bridge board inside low-profile enclosures.
推薦
Embedded Data Acquisition Front-End
The PIC18F2520-E/SO serves as a battery-powered data-acquisition front end: the 10-bit ADC samples up to 10 inputs at up to 100 ksps aggregate, and the MSSP port offloads buffered samples to an SD card or external FRAM via SPI. With nanoWatt Technology Sleep currents in the single-digit microamp range, the front end can idle most of the time and wake on a timer or external interrupt, dramatically extending battery life in remote-instrumentation installations. The -40 C to +125 C extended grade handles outdoor weather stations.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F2520-E/SO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC18F2520-I/SO | PIC18F2520T-E/SO | PIC18F2525-E/SO | PIC18F2420-E/SO | PIC18F2523-E/SO | PIC18F25K20-I/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | 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 | 28-SOIC - same | 28-SOIC - same |
| Flash Memory | 32 KB | 32 KB | 32 KB | 48 KB (+16 KB) | 16 KB (-16 KB) | 32 KB | 32 KB |
| RAM | 1.5 KB (3968 B) | 1.5 KB | 1.5 KB | 4 KB | 1 KB | 1.5 KB | 1.5 KB |
| CPU Clock (max) | 25 MHz (10 MIPS @ 40 MHz osc) | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 48 MHz (12 MIPS) | 64 MHz / 16 MIPS (K-series) |
| ADC Resolution | 10-bit, 10 channels | 10-bit | 10-bit | 10-bit | 10-bit | 12-bit | 10-bit |
| Operating Temperature | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C |
| Power Saving | nanoWatt Technology | nanoWatt Technology | nanoWatt Technology | nanoWatt Technology | nanoWatt Technology | nanoWatt Technology | nanoWatt XLP |
主要差異化特點
- Extended -40 C to +125 C temperature grade over the Industrial-grade sibling (對比PIC18F2520-I/SO)
- Highest flash/RAM tier in the PIC18F2x20 family (對比PIC18F2420-E/SO)
- Full nanoWatt Technology vs XLP on K-series refresh (對比PIC18F25K20-I/SO)
設計說明
Estimated: at 25 MHz CPU clock on 5 V supply with all peripherals active, the PIC18F2520-E/SO draws roughly 12-15 mA (datasheet IDD vs frequency curve). Add a 100 nF ceramic decoupling capacitor on each of the two VDD pins (pin 19 and pin 28) and a single bulk 10 uF tantalum or aluminum-polymer cap within 25 mm of the package. Place analog and digital VDD/VSS traces so return currents do not share the same copper segment under the SOIC, preventing ADC reference bounce during CCP switching.
Keep the 28-SOIC land pattern per IPC-7351 SOIC127P762X203-28M (0.65 mm pitch, 7.5 mm body). Place the ICSP/ICD pins (RB6/PGC, RB7/PGD, RA5/PGM) on a 0.1" header or test-point pad so the PICkit 5 can attach. For production programming, route the PGC/PGD traces to a 6-pin right-angle connector at the board edge. Avoid long parallel traces under the crystal (RA6/OSC2, RA7/OSC1) - ground-guard both signals for EMI suppression. The Extended-grade part's -40 C to +125 C range can be exercised in chamber testing by trimming the resistor values for brown-out if needed.
Do not confuse the PIC18F2520 / PIC18F25K20 / PIC18F2620 silicon - the K20 SFR names and oscillator control registers differ and firmware does not port. Verify brown-out voltage (BORV) configuration bits match the supply ramp rate; on a slow-ramping supply (USB bus-powered) set BORV=00 (max) to avoid spurious resets. Read-modify-write operations on PORT registers (LATx) require the read-after-write timing; in interrupt service routines use the LATx register, not PORTx, to avoid one-cycle ghost-write artifacts on the I/O pin.
合規資訊
RoHS and REACH compliance per Microchip product page. The PIC18F2520 family is not AEC-Q100 qualified - for automotive designs, refer to the PIC18F-K-series Q-graded variants. Halogen-free status not stated on the public datasheet; defaulted to "unknown" per Data Authenticity Rule.
