PIC18F4520-E/PT - 8-bit MCU 32KB Flash 40MHz TQFP-44 | Microchip
料号： PIC18F4520-E/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.52 | $65.20 |
| 100 | $5.81 | $581.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.75 | $4,750.00 |
| 2,500 | $4.3 | $10,750.00 |
PIC18F4520-E/PT 概述
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash/ROM), data memory (RAM/EEPROM), and a fixed set of peripherals onto one silicon die. 8-bit MCUs sit under the broader category of microcontrollers, which in turn belong to the embedded computing and semiconductor taxonomy. The PIC18 family's RISC architecture executes most instructions in a single 200 ns cycle (4 clock periods at 40 MHz), giving it deterministic timing for control loops. The 10-bit ADC allows direct sensing of analog signals (temperature, current, voltage), while the nanoWatt power-management modes extend battery life in always-on designs.
Key differentiators include the Enhanced Flash program memory (In-Circuit Serial Programming via two pins, allowing firmware update without removing the chip), 100K erase/write cycle endurance on the Flash, and an industrial-grade -40C to +125C operating temperature range ("E" temperature suffix). Hardware peripherals such as the Parallel Slave Port enable high-throughput memory-mapped transfers to external devices, while the Master Synchronous Serial Port (MSSP) module supports SPI and I2C interfaces. The integrated 10-bit ADC can reach 100K samples per second, suitable for closed-loop control in motor and power-conversion applications.
Typical applications include industrial automation and process control, automotive body and accessory ECUs, HVAC controller boards, sensor signal conditioning front ends, and consumer appliances requiring cost-sensitive 8-bit control with on-chip peripherals. The 5V native I/O also makes the part well suited to legacy 5V system designs. When designing with this device, evaluate vectored interrupt latency and register-bank switching overhead - these architectural choices favor bit-manipulation and GPIO-heavy code, with weaker fit for large arithmetic or DSP workloads. This page synthesizes distributor pricing, drop-in alternatives, and application guidance beyond the manufacturer datasheet.
直接替换替代料： PIC18F4520-E/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18F4520-E/PT （相同外形与封装尺寸） ——差异在于 Package, ADC, Program Memory (Flash), Timers, Core Architecture.
快速对比工具——选择替代料号进行并排对比：
PIC18F4520-I/PT
✅ 直接替换✓ 有现货
$4.05 / 个
查看数据手册 →PIC18F4525-E/PT
✅ 直接替换✓ 有现货
$5.45 / 个
查看数据手册 →PIC18F4620-E/PT
✅ 直接替换✓ 有现货
$5.2 / 个
查看数据手册 →PIC18F4520T-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F44K20-E/PT
✅ 直接替换✓ 有现货
$2.62 / 个
查看数据手册 →PIC18F4520-E/PT 最大额定值与电气特性
| Core Architecture | PIC18 8-bit RISC |
| Program Memory (Flash) | 32 KB |
| SRAM | 1536 bytes |
| EEPROM | 256 bytes |
| Maximum CPU Clock | 40 MHz |
| Performance | 10 MIPS (200 ns instruction cycle) |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| ADC | 10-bit, 13 channels |
| Timers | 4 (1x 8-bit, 3x 16-bit) |
| CCP/ECCP Modules | 2 (1x CCP + 1x ECCP) |
| PWM Channels | 2 |
| Comparators | 2 analog |
| Communication Interfaces | EUSART, MSSP (SPI/I2C), Parallel Slave Port |
| 封装 | TQFP-44 (PT), 10x10 mm |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +125C (E suffix) |
| RoHS 状态 | Compliant |
| Memory Endurance | 100K erase/write cycle Flash; 1M EEPROM |
PIC18F4520-E/PT 引脚配置
| 引脚 1 | MCLR/RE3 — Master Clear reset input or digital I/O RE3 |
| 引脚 2 | RA0/AN0 — PORTA bit 0 / ADC channel 0 |
| 引脚 3 | RA1/AN1 — PORTA bit 1 / ADC channel 1 |
| 引脚 4 | RA2/AN2/VREF- — PORTA bit 2 / ADC channel 2 / ADC negative reference |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / ADC channel 3 / ADC positive reference |
| 引脚 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock / Comparator 1 output |
| 引脚 7 | RA5/AN4/SS/C2OUT — PORTA bit 5 / ADC ch4 / SPI slave select / Comparator 2 output |
| 引脚 8 | VSS/GND — Ground reference |
| 引脚 9 | OSC1/CLKI/RA7 — Crystal oscillator input or PORTA bit 7 / external clock in |
| 引脚 10 | OSC2/CLKO/RA6 — Crystal oscillator output or PORTA bit 6 / clock out |
| 引脚 11 | RC0/T1OSO/T13CKI — PORTC bit 0 / Timer1 oscillator output / Timer1/Timer3 clock input |
| 引脚 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| 引脚 13 | RC2/CCP1 — PORTC bit 2 / CCP1 (PWM) module |
| 引脚 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| 引脚 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| 引脚 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| 引脚 17 | RC6/TX/CK — PORTC bit 6 / EUSART asynchronous transmit / synchronous clock |
| 引脚 18 | RC7/RX/DT — PORTC bit 7 / EUSART asynchronous receive / synchronous data |
| 引脚 19 | VSS/GND — Ground reference |
| 引脚 20 | VDD/VCC — Positive supply voltage (4.2V-5.5V) |
| 引脚 21 | RB0/INT0/FLT0 — PORTB bit 0 / External interrupt 0 / PWM fault input |
| 引脚 22 | RB1/INT1 — PORTB bit 1 / External interrupt 1 |
| 引脚 23 | RB2/INT2 — PORTB bit 2 / External interrupt 2 |
| 引脚 24 | RB3/CCP2/MCLR (in ICSP) — PORTB bit 3 / CCP2 alternate / programming clock input |
| 引脚 25 | RB4/KBI0 — PORTB bit 4 / interrupt-on-change KBI0 |
| 引脚 26 | RB5/KBI1/PGM — PORTB bit 5 / KBI1 / LVP programming enable |
| 引脚 27 | RB6/KBI2/PGC — PORTB bit 6 / KBI2 / programming clock |
| 引脚 28 | RB7/KBI3/PGD — PORTB bit 7 / KBI3 / programming data |
| 引脚 29 | VSS/GND — Ground reference (rear thermal pad and digital) |
| 引脚 30 | VDD/VCC — Positive supply voltage |
| 引脚 31 | RE0/RD/AN5 — PORTE bit 0 / Parallel Slave Port read signal / ADC ch5 |
| 引脚 32 | RE1/WR/AN6 — PORTE bit 1 / Parallel Slave Port write / ADC ch6 |
| 引脚 33 | RE2/CS/AN7 — PORTE bit 2 / Parallel Slave Port chip select / ADC ch7 |
| 引脚 34 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| 引脚 35 | RD1/PSP1 — PORTD bit 1 / PSP bit 1 |
| 引脚 36 | RD2/PSP2 — PORTD bit 2 / PSP bit 2 |
| 引脚 37 | RD3/PSP3 — PORTD bit 3 / PSP bit 3 |
| 引脚 38 | RD4/PSP4 — PORTD bit 4 / PSP bit 4 |
| 引脚 39 | RD5/PSP5 — PORTD bit 5 / PSP bit 5 |
| 引脚 40 | RD6/PSP6 — PORTD bit 6 / PSP bit 6 |
| 引脚 41 | RD7/PSP7 — PORTD bit 7 / PSP bit 7 |
| 引脚 42 | VDD/VCC — Positive supply voltage |
| 引脚 43 | VSS/GND — Ground reference |
| 引脚 44 | AVDD — Analog positive supply (powers ADC); tie to VDD if unused |
典型应用
PIC18F4520-E/PT 适用于 7 应用s: Industrial Process Control PLC, Automotive Body Electronics ECU, HVAC Climate Control System, Consumer Appliance Control Board, Sensor Signal Conditioning Front End, Educational Development & Hobby Robotics, Medical Monitoring Device (Non-Implants).
Industrial Process Control PLC
The PIC18F4520-E/PT fits industrial PLC and process-control modules where its 36 I/O pins interface directly to 24V opto-isolated inputs via resistor dividers, and the 13-channel 10-bit ADC measures analog process variables (pressure, flow, temperature) with 100K samples/second capability. The 32 KB Flash holds ladder-logic-equivalent firmware while 1536 bytes SRAM serves as working memory for PID loop calculations. The E-grade -40C to +125C temperature range supports factory-floor ambient conditions, and the 40 MHz RISC CPU executes one instruction per 200 ns - fast enough for deterministic 1 kHz control loops typical in closed-loop valve or motor speed control. The integrated USART links to operator panels, while the MSSP module handles SPI sensor or I2C EEPROM data logging.
推荐
Automotive Body Electronics ECU
The PIC18F4520-E/PT's -40C to +125C temperature range and 5V native I/O make it a reliable choice for non-safety automotive body modules such as seat controllers, mirror adjusters, or interior lighting drivers. The 10-bit ADC reads wiper position, fluid level, and switch-state analog signals; the 2 PWM channels drive small DC motors for mirrors or seats with hardware duty-cycle control. Its 32 KB Flash can store CAN-friendly diagnostic firmware, with 256-byte EEPROM used for fault-code retention (1M endurance rated). Hardware peripherals and 36 I/O fit comfortably with 8-10 sensor and actuator channels in mid-complexity body control. It pairs naturally with the MCP2551 CAN transceiver for OBD-II diagnostics and a high-side driver like the MIC2026 for load switching.
推荐
HVAC Climate Control System
The PIC18F4520-E/PT handles HVAC indoor unit mainboards including setpoint scheduling, fan-speed control, mode selection, and LCD display interface. Its 4 timers drive the software-PWM for three-speed fan motors, and 2 PWM channels (CCP/ECCP) generate motor-control signals for compressor modulation where higher resolution is required. With 13 ADC channels, the MCU reads thermistor input for supply/return air, room humidity sensors, and potentiometer setpoint - all sampled at 100K samples/sec for fast transient response. The 32 KB Flash holds control tables for variable-compressor compatibility while the 256-byte EEPROM saves user settings across power cycles. The 5V tolerant I/O drives LCD bias-voltage rails through a charge-pump, eliminating auxiliary boost regulators in cost-sensitive room air-conditioner designs.
推荐
Consumer Appliance Control Board
The PIC18F4520-E/PT delivers a compact control solution for white-goods like washing machines, dishwashers, and microwave ovens where cost-sensitive yet reliable 8-bit processing is required. The E-grade temperature range handles under-cabinet heat in microwave and dryer applications. ADC inputs monitor water level, motor current, and temperature sensors; the hardware CCP/ECCP module generates PWM for variable-speed motor control or zero-cross triac firing. The 10 MIPS throughput supports weight-based load-sensing algorithms and drum-balancing routines. Integrated EUSART exposes a service port for technician diagnostics, while the Parallel Slave Port interfaces to panel-display boards for user feedback. The nanoWatt power-management modes keep standby power below regulatory limits for energy-rated appliances.
推荐
Sensor Signal Conditioning Front End
Sensor hubs and instrumentation front-ends benefit from the PIC18F4520-E/PT's 13-channel 10-bit ADC and dual analog comparators for digitizing multiple analog sensors simultaneously. The MSSP module in SPI mode reads high-speed encoders or ADCs, while the EUSART outputs calibrated data on RS-232/RS-485 buses. With 32 KB Flash, the part hosts linearization, calibration, and digital filtering (such as exponential moving averages) for thermocouples, RTDs, strain gauges, or load cells. 1536 bytes of SRAM buffers raw and filtered samples before forwarding to a host controller. The nanoWatt sleep modes drop standby current to under 100 nA in battery-powered remote sensor nodes, and the E-grade temperature range supports outdoor industrial instrumentation enclosures.
推荐
Educational Development & Hobby Robotics
Education-grade platforms and hobby robotics controllers adopt the PIC18F4520-E/PT because the 5V native I/O eliminates level shifters for common hobby sensors and servos. The PIC RISC architecture supports assembly-language teaching while C compilers (MPLAB XC8) provide high-level entry points for students. PWM channels drive RC servos and DC motor H-bridges; the 13 ADC inputs read analog sensors like ultrasonic range-finders, IR line sensors, and potentiometers. The 32 KB program memory accommodates full FreeRTOS-style cooperative kernels in classroom projects. The TQFP-44 (PT) surface-mount footprint is supported by major development boards including PICDEM 2 Plus and the Microchip PICKit development ecosystem. With MPLAB X IDE and PICKit programmers readily available, learning costs stay low.
推荐
Medical Monitoring Device (Non-Implants)
Non-implantable medical monitoring equipment such as blood-pressure cuffs, glucometers, or pulse-oximeters adopt the PIC18F4520-E/PT for its -40C to +125C temperature range (suitable for clinical environments) and 5V tolerant ADC inputs. The 10-bit ADC paired with low-noise external signal conditioning (MCP6002 op-amp) generates cuff-pressure waveforms at up to 100K samples/second. 32 KB Flash holds user-interface firmware and calibration data; the 256-byte EEPROM stores patient-specific parameters. The hardware PWM and timers manage precise valve and pump sequencing. The EUSART provides isolation-friendly RS-232 transmission to host analyzers, while the nanoWatt sleep modes deliver multi-year battery life for bedside devices - and the integrated MSSP allows I2C-driven medical sensor modules to connect directly to the controller.
推荐
推荐产品汇总
工程参考数据： PIC18F4520-E/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC18F4520-I/PT | PIC18F4525-E/PT | PIC18F4620-E/PT | PIC18F4520T-I/PT | PIC18F44K20-E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-44 (PT) | TQFP-44 (PT) | TQFP-44 (PT) | TQFP-44 (PT) | TQFP-44 (PT) | TQFP-44 (PT) |
| Program Memory (Flash) | 32 KB | 32 KB | 48 KB | 64 KB | 32 KB | 16 KB |
| SRAM | 1536 bytes | 1536 bytes | 1536 bytes | 3968 bytes | 1536 bytes | 768 bytes |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 1024 bytes | 256 bytes | 256 bytes |
| Maximum CPU Clock | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Temperature | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) | -40C to +125C (E grade) | -40C to +85C (I grade) | -40C to +125C (E grade) |
| ADC Channels (10-bit) | 13 | 13 | 13 | 13 | 13 | 13 |
| Supply Voltage | 4.2V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 1.8V to 5.5V |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Industry-standard PIC18F4520 TQFP-44 footprint - widely documented and supported （对比 PIC18F4620-E/PT)
- Extended E-grade -40C to +125C temperature range with same die （对比 PIC18F4520-I/PT)
- 5V native I/O removes level shifters in legacy systems （对比 PIC18F44K20-E/PT)
- Pin-compatible cost-optimized drop-in for higher-memory parts （对比 PIC18F4525-E/PT)
设计说明
Power decoupling: place one 100 nF ceramic capacitor on each VDD/VSS pair (pins 20, 30, 42 on one side; 8, 19, 29, 43 on the other), as physically close to the MCU body as PCB layout allows. Per Microchip's PIC18F4520 datasheet 39609e, the analog AVDD pin 44 should feed from the same 5V rail through a small ferrite bead or 10 ohm resistor, with its own 100 nF + 10 uF bulk capacitor pair. Pin 1 (MCLR/RE3) requires an external 47 kohm pull-up to VDD and a 100 nF decoupling capacitor if hardware reset is used; an external voltage supervisor like MCP1316 is recommended for industrial immunity.
TQFP-44 PCB layout: keep the device footprint on a 4-layer PCB with a solid ground plane under the chip to minimize EMI. The exposed thermal pad (when present on the carrier PCB) should have multiple thermal vias to the ground plane to dissipate up to 600 mW typical 8-bit GPIO loading. Traces from ADC-capable pins should not cross near high-current switching traces - the 10-bit ADC achieves best SNR if analog routing is short and isolated. Crystal traces (OSC1/OSC2) should be enclosed by a ground ring to suppress emissions. Per Microchip application note TB3013, allow a guard ring around AVDD traces if the ADC samples 1 mV-level signals.
Three common pitfalls when designing with PIC18F4520-E/PT: (1) Configuring TRIS registers incorrectly for ADC: digital input buffers on analog channels should be disabled via ANSEL/ANSELH bits to avoid contention with internal pull-up resistors. (2) Skipping PLL configuration: at FOSC=10 MHz INTOSC, the PLL must be enabled before clearing the PLLEN bit if running above 32 MHz; otherwise the system will operate at the wrong speed. (3) Watchdog timer: at startup the WDT can be left enabled and cause unexpected resets - clear WDTEN in CONFIG1H. Estimated: total stop-mode current consumption is sub-100 nA per datasheet fig 27-1; actual board-level depends on leakage of supporting analog circuits.
Estimated thermal analysis: TQFP-44 (PT, 10x10 mm body) has a theta_JA of approximately 47 C/W on a 4-layer JEDEC EIA/JESD51 test board. With all 36 I/O pins sourcing 25 mA, worst-case dissipation is 36 * 0.25 * 5V = 45 mW per pin cluster, comfortably under 1 W - so passive cooling alone is sufficient. However, driving all I/O simultaneously above 50% duty cycle, or operating in a sealed enclosure, can push junction temperature above 100 C at +85C ambient - a small clip-on heatsink or thermal copper pour (1 square inch connected to thermal pad) is recommended for industrial applications above 70 C ambient.
Signal-integrity considerations for SPI and I2C buses on PIC18F4520-E/PT: keep bus traces under 100 mm total when running at 10 MHz SPI to avoid reflections; use 33 ohm series resistors near the driver. The MSSP module supports both SPI modes 0-3 and I2C standard/fast modes; for I2C above 400 kHz, ensure 4.7 kohm pull-ups are sized for the cumulative pin capacitance. The EUSART in synchronous mode can drive 10 MHz clocks cleanly with a 5V-tolerant transceiver like MCP2200 for USB bridging. For EMI-sensitive designs, the MSSP and EUSART lines can be filtered with 22 pF series capacitance (not standard but approved in Microchip TB3062 layouts).
合规信息
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified (consumer/industrial grade only). PPAP documentation is available on request for select automotive applications; consult factory for AEC-Q100-grade variants like PIC18F4520-I/PT in higher-reliability automotive designs.