PIC18F4520-I/PT - 8-Bit MCU 40MHz 32KB Flash TQFP-44 | Microchip
MPN: PIC18F4520-I/PT ✓ فعالPIC18F4520-I/PT نمای کلی
An 8-bit microcontroller (MCU) is an integrated circuit that contains a processor core, program memory, data memory, and peripherals on a single chip, executing one instruction per cycle on 8-bit-wide data paths. Within the system hierarchy, the MCU sits at the heart of embedded control systems, ranking below application processors but above simple logic ICs in capability. The PIC18F4xxx family extends Microchip's mid-range PIC architecture with a 16-bit-wide instruction set, enhanced Flash endurance, and nanoWatt technology for low-power design.
Key features of the PIC18F4520 include 10-bit analog-to-digital conversion across multiple channels, nanoWatt power management, capture/compare/PWM (CCP) modules, an enhanced CCP (ECCP) module, and a priority interrupt structure with three programmable external interrupts. Per the family datasheet, the device integrates one 8-bit timer, three 16-bit timers, and a watchdog timer, providing flexible timing resources without external components.
Architecturally, the PIC18F4520 uses a Harvard architecture with separate program and data buses, an Enhanced Flash program memory with high write endurance, and linear addressing via the Phase-Locked Loop (PLL) that multiplies the oscillator input to reach the 40 MHz internal clock. The industrial-grade temperature rating (-40C to +85C, denoted by the -I suffix) suits harsh environments.
Typical applications include industrial automation and control panels, automotive accessories (non-safety), instrumentation and data loggers, and consumer appliance control boards. The 10-bit ADC and CCP/PWM outputs make it well suited to sensor acquisition and motor or LED control.
Design considerations: the 44-TQFP footprint requires careful decoupling of multiple VDD/VSS pairs, and the RB6/RB7 pins double as the In-Circuit Serial Programming (ICSP) clock and data lines - keep programming headers accessible.
This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
جایگزین‌های drop-in برای PIC18F4520-I/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 PIC18F4520-I/PT (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Operating Temperature, Core, Timers, Package, ADC.
PIC18LF4520-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4525-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4523-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4580-I/PT
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
PIC18F4480-I/PT
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←PIC18F4520-I/PT حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | 8-bit PIC18 Harvard |
| حداکثر فرکانس کلاک | 40 MHz |
| Program Memory Size | 32 KB (16K x 16) Flash |
| Program Memory Type | Enhanced Flash |
| بسته‌بندی | 44-TQFP (10x10 mm) |
| نوع نصب | Surface Mount |
| ADC Resolution | 10-bit |
| Timers | One 8-bit timer, three 16-bit timers |
| CCP Modules | CCP and enhanced CCP (ECCP) |
| External Interrupts | 3 programmable external interrupts |
| Watchdog Timer | Yes |
| Low Power Technology | nanoWatt Technology |
| دمای کاری | -40C to +85C (industrial, -I suffix) |
| تعداد پایه | 44 |
| Programming Interface | ICSP (In-Circuit Serial Programming), supports MPLAB PICkit 5 |
| Series | PIC PIC18F |
پیکربندی پین PIC18F4520-I/PT
| پین 1 | MCLR/VPP/RE3 — Master clear reset / programming voltage / digital input |
| پین 2 | RA0/AN0 — Port A bit 0 / Analog channel 0 |
| پین 3 | RA1/AN1 — Port A bit 1 / Analog channel 1 |
| پین 4 | RA2/AN2/VREF- — Port A bit 2 / Analog channel 2 / ADC negative reference |
| پین 5 | RA3/AN3/VREF+ — Port A bit 3 / Analog channel 3 / ADC positive reference |
| پین 6 | RA4/TOCKI/C1OUT — Port A bit 4 / Timer0 clock input / Comparator 1 output |
| پین 7 | RA5/AN4/SS/HLVDIN/C2OUT — Port A bit 5 / Analog channel 4 / SPI slave select / HLVD input / Comparator 2 output |
| پین 8 | VSS — Ground reference |
| پین 9 | OSC1/CLKI/RA7 — Oscillator crystal input / external clock input / Port A bit 7 |
| پین 10 | OSC2/CLKO/RA6 — Oscillator crystal output / clock output / Port A bit 6 |
| پین 11 | RC0/T1OSO/T13CKI — Port C bit 0 / Timer1 oscillator output / Timer1/3 external clock |
| پین 12 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / Capture-Compare-PWM 2 |
| پین 13 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 |
| پین 14 | VDD — Positive power supply |
| پین 15 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| پین 16 | RD0/PSP0 — Port D bit 0 / Parallel slave port bit 0 |
| پین 17 | RD1/PSP1 — Port D bit 1 / Parallel slave port bit 1 |
| پین 18 | RD2/PSP2 — Port D bit 2 / Parallel slave port bit 2 |
| پین 19 | RD3/PSP3 — Port D bit 3 / Parallel slave port bit 3 |
| پین 20 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| پین 21 | RC5/SDO — Port C bit 5 / SPI data out |
| پین 22 | RC6/TX/CK — Port C bit 6 / USART transmit / SPI clock |
| پین 23 | RC7/RX/DT — Port C bit 7 / USART receive / data |
| پین 24 | RD4/PSP4 — Port D bit 4 / Parallel slave port bit 4 |
| پین 25 | RD5/PSP5 — Port D bit 5 / Parallel slave port bit 5 |
| پین 26 | RD6/PSP6 — Port D bit 6 / Parallel slave port bit 6 |
| پین 27 | RD7/PSP7 — Port D bit 7 / Parallel slave port bit 7 |
| پین 28 | VSS — Ground reference |
| پین 29 | VDD — Positive power supply |
| پین 30 | RB0/INT0 — Port B bit 0 / External interrupt 0 |
| پین 31 | RB1/INT1 — Port B bit 1 / External interrupt 1 |
| پین 32 | RB2/INT2 — Port B bit 2 / External interrupt 2 |
| پین 33 | RB3/CCP2 — Port B bit 3 / Capture-Compare-PWM 2 (alternate) |
| پین 34 | RB4 — Port B bit 4 / interrupt-on-change |
| پین 35 | RB5/PGM — Port B bit 5 / low-voltage programming pin |
| پین 36 | RB6/PGC — Port B bit 6 / ICSP programming clock |
| پین 37 | RB7/PGD — Port B bit 7 / ICSP programming data |
| پین 38 | RE0/RD/AN5 — Port E bit 0 / PSP read strobe / Analog channel 5 |
| پین 39 | RE1/WR/AN6 — Port E bit 1 / PSP write strobe / Analog channel 6 |
| پین 40 | RE2/CS/AN7 — Port E bit 2 / PSP chip select / Analog channel 7 |
| پین 41 | AVDD — Analog positive supply (for ADC) |
| پین 42 | AVSS — Analog ground (for ADC) |
| پین 43 | VSS — Ground reference |
| پین 44 | VDD — Positive power supply |
کاربردهای معمول
PIC18F4520-I/PT مناسب است برای 6 کاربردs: Industrial Automation and Control, Instrumentation and Data Logging, Motor and LED PWM Control, Consumer Appliance Control, Automotive Accessories (Non-Safety), Embedded Learning and Prototyping.
Industrial Automation and Control
The PIC18F4520-I/PT fits industrial control boards because its 40 MHz core, three 16-bit timers, and CCP/ECCP modules handle timing-critical sequencing, while the 10-bit ADC digitizes up to 13 analog sensor channels such as potentiometers, current shunts, and temperature sensors. In a PLC-style I/O card it reads analog inputs, drives relay outputs via the parallel slave port or PORTD, and communicates over UART (RC6/RX, RC7/TX) to supervisory systems. The -I grade (-40C to +85C) covers control-cabinet environments. Design with watchdog enabled and ceramic decoupling at each of the multiple VDD/VSS pin pairs to survive noisy switch-mode loads.
پیشنهادی
Instrumentation and Data Logging
For data loggers and bench instruments, the PIC18F4520-I/PT combines a 10-bit ADC with nanoWatt technology so the system can sleep between samples and wake on external interrupt (INT0/INT1/INT2 on RB0-RB2). A typical design samples analog channels at 10-bit resolution, time-stamps them with Timer1 (which can run from a 32.768 kHz watch crystal on T1OSO/T1OSI), and stores results in external EEPROM over the RC3/SCL, RC4/SDA I2C lines. The ECCP module can gate a precision excitation pulse for sensor ratiometric measurements. Current during Run depends on clock; verify datasheet figures for your voltage and frequency combination before battery sizing.
پیشنهادی
Motor and LED PWM Control
The ECCP module of the PIC18F4520-I/PT generates half-bridge and full-bridge PWM with programmable dead-band control, making it appropriate for DC and stepper motor drives and for high-power LED dimming. PWM resolution scales with the timer clock - at 40 MHz the module supports up to 10-bit PWM at reduced frequency or 8-bit PWM at higher frequency, per the family datasheet. The 10-bit ADC closes the loop by reading motor current via a shunt or LED current feedback. Use RC2/CCP1 or RB3/CCP2 as the PWM output, and pair with an external gate driver rather than driving MOSFET gates directly from the MCU pins.
پیشنهادی
Consumer Appliance Control
Appliance control boards (rice cookers, air conditioners, coffee machines) benefit from the PIC18F4520-I/PT's low system cost, 32 KB of Flash holding user-interface plus control firmware, and RB0-RB7 with weak pull-ups for a membrane-key matrix. The nanoWatt technology keeps standby consumption low for always-plugged appliances, and the internal PLL lets a low-cost crystal generate the 40 MHz operating clock. The 10-bit ADC reads NTC thermistors for temperature closed-loop control while CCP outputs drive triacs or relays via zero-cross timing. The 44-TQFP (10x10 mm) footprint keeps the PCB compact for control-panel housings.
پیشنهادی
Automotive Accessories (Non-Safety)
For non-safety automotive accessories such as lighting controllers, seat-memory modules, and telematics add-ons, the PIC18F4520-I/PT's industrial -40C to +85C range suits cabin and under-dash zones. The 10-bit ADC reads battery-sense and potentiometer inputs, while the ECCP module generates lamp PWM and the UART (RC6/RC7) links to telematics or K-line interfaces. Design considerations include load-dump transient protection upstream of the regulator, a brown-out configuration on reset, and watchdog supervision. For CAN-enabled accessories in the same footprint, the drop-in PIC18F4580-I/PT variant adds an ECAN controller without PCB rework, simplifying platform sharing across vehicle lines.
پیشنهادی
Embedded Learning and Prototyping
The PIC18F4520-I/PT remains a popular teaching MCU in embedded-systems courses because it exposes classic peripherals - UART, I2C/SPI, CCP/PWM, a multi-channel 10-bit ADC, and external interrupts - on a single well-documented 8-bit core. Prototyping uses Microchip's MPLAB X IDE with a PICkit 5 debugger connected to a 5-pin ICSP header on RB6/RB7/MCLR, allowing in-circuit flashing of the 32 KB Flash across thousands of erase cycles. DIP adapter boards convert the 44-TQFP footprint for breadboard use. Students learn Harvard architecture, interrupt prioritization, and nanoWatt power modes with the same tools used in production environments.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای PIC18F4520-I/PT — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | PIC18LF4520-I/PT | PIC18F4525-I/PT | PIC18F4523-I/PT | PIC18F4580-I/PT | PIC18F4480-I/PT |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same | 44-TQFP (10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB (16K x 16) | 32 KB (16K x 16) | 48 KB (24K x 16) | 64 KB (32K x 16) | 32 KB (16K x 16) | 16 KB (8K x 16) |
| Max Clock Frequency | 40 MHz | 40 MHz (derates at low VDD) | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 12-bit | 10-bit | 10-bit |
| CAN Peripheral | No | No | No | No | Yes (ECAN) | Yes (CAN 2.0B) |
| Low-Voltage Option | No (standard 5 V class) | Yes (LF, ~2.0 V min) | No | No | No | No |
| ICSP Programming | Yes (RB6/RB7, MPLAB PICkit 5) | Yes (same pins) | Yes (same pins) | Yes (same pins) | Yes (same pins) | Yes (same pins) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
تفاوت‌های کلیدی
- Low-voltage operation for battery and mixed-rail designs (در مقابلPIC18LF4520-I/PT)
- Balanced 32 KB Flash headroom (در مقابلPIC18F4480-I/PT)
- Cost-optimized for non-networked control (در مقابلPIC18F4580-I/PT)
- Simple 10-bit ADC keeps cost low (در مقابلPIC18F4523-I/PT)
یادداشت‌های طراحی
The TQFP-44 provides four separate VDD/VSS pin pairs plus dedicated AVDD/AVSS pins (41/42) for the ADC. Decouple each VDD pin with a 100 nF ceramic capacitor placed within 2-3 mm of the pin, and add one bulk 4.7-10 uF capacitor near the supply entry. Connect AVDD to VDD through an RC or ferrite filter and tie AVSS to a quiet analog ground island - this directly improves ADC noise performance on the 10-bit converter, where even 1 LSB corresponds to about 4.9 mV at a 5 V reference.
RB6 (PGC) and RB7 (PGD) double as the ICSP programming clock and data lines. If your application drives these pins, ensure the external circuitry does not fight the programmer - series resistors (typically 470 ohm-1 kohm) on both lines isolate application loads while leaving ICSP functional. Also reserve pin 1 (MCLR/VPP) for the programming voltage: never clamp it with a strong pull-up to VDD unless you have disabled MCLR in configuration fuses and accept low-voltage programming limitations.
nanoWatt Technology on the PIC18F4520 enables multiple sleep and idle modes. For battery designs, run the clock from the internal oscillator or a low-frequency Timer1 crystal during sleep and switch to the PLL-driven 40 MHz clock only when computation is required. Estimated: at a typical 5 V system, dynamic current scales roughly linearly with frequency, so sleeping between tasks can reduce average current by an order of magnitude versus running continuously - confirm exact figures against the datasheet current-versus-frequency tables for your voltage.
When using the parallel slave port (RD0-RD7 with RE0-RE2 strobes) to interface with a host processor, keep the bus traces short (<10 cm) and consider series termination if the host drives fast edges. Unused PORTB pins should be configured with weak internal pull-ups or driven outputs to avoid floating-input oscillation, which increases supply noise and can upset the interrupt-on-change logic.
اطلاعات انطباق
Compliance status not stated in the provided verified web data. Microchip standard production parts are typically RoHS-compliant, but verify on the official Microchip product page before specification.