PIC18F8720-I/PTC01 - 8-bit 25MHz 128KB Flash MCU | Microchip
MPN： PIC18F8720-I/PTC01 ✗ 停產PIC18F8720-I/PTC01 概覽
What is a PIC microcontroller? PIC (Peripheral Interface Controller) microcontrollers are 8/16/32-bit RISC-based microcontrollers built around Harvard architecture (separate program and data buses). The PIC18 family is Microchip's high-performance 8-bit line, offering enhanced instruction set, large memory models, and rich peripherals for embedded applications. They sit in the technology hierarchy: PIC18 -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC.
Key differentiating features include 128 KB Flash, 3.75 KB SRAM, 1 KB EEPROM for non-volatile data storage, External oscillator support for precision clocking, and industrial temperature range of -40°C to +85°C. The PIC18 instruction set is upward compatible with the PIC16 and PIC17 families, easing migration paths for legacy designs originally written for older PIC microcontrollers.
Technically, the PIC18F8720 uses a 16-bit instruction word with 8-bit data path, a 32-level hardware stack, and Multiply/Divide assist hardware. The device supports both Internal and External oscillator modes, has 4 Timer modules, dual capture/compare/PWM modules, and an enhanced 10-bit A/D converter. The PIC18F8720 is also pin-compatible with the PIC17C76X family of OTP devices.
Typical applications include industrial automation controllers, building automation systems, automotive body electronics, instrumentation, embedded connectivity gateways, and legacy upgrade designs where PIC17C76X OTP replacements are needed.
When laying out a PCB for the PIC18F8720, place decoupling capacitors (100 nF and 10 µF) close to each VDD/VSS pair and route the external crystal traces symmetrically with a ground guard ring to minimize EMI. Note that this part is in Obsolete lifecycle status, so consider the enhanced PIC18F8722 or PIC18F85K22 for new designs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 PIC18F8720-I/PTC01 — 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： PIC18F8720-I/PTC01 （相同外形與佔位） — 差異在於 Core Architecture, Package, I/O Pins, Program Memory (Flash), MSL Level.
PIC18F8720-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F8720T-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F8720-E/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18F8722-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85K22-I/PT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC18F8620-I/PT
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F8520-I/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC18F8720-I/PTC01 最大額定值與電氣特性
| Core Architecture | PIC 8-bit RISC |
| Core Processor | PIC18 |
| Program Memory Type | Flash |
| Program Memory Size | 128 KB (64K x 16) |
| RAM Size | 3.75 KB |
| EEPROM Size | 1 KB |
| Number of I/O Pins | 68 |
| 封裝 / 外殼 | 80-TQFP (12x12 mm) |
| 工作溫度範圍 | -40°C to +85°C (Industrial) |
| Oscillator Type | External |
| A/D Converter | 10-bit |
| Number of A/D Channels | 16 |
| 資料匯流排寬度 | 8-bit |
| Connectivity | I²C, SPI, USART |
| Instruction Set Compatibility | PIC16, PIC17, PIC17C76X |
| Number of Timers | 4 |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
PIC18F8720-I/PTC01 腳位配置
| 腳位 1 | OSC1/CLKIN — External oscillator input / external clock input |
| 腳位 2 | OSC2/CLKOUT — External oscillator output / clock output |
| 腳位 3 | RA0/AN0 — Digital I/O / analog input channel 0 |
| 腳位 4 | RA1/AN1 — Digital I/O / analog input channel 1 |
| 腳位 5 | RA2/AN2/VREF- — Digital I/O / analog input channel 2 / A/D VREF- |
| 腳位 6 | RA3/AN3/VREF+ — Digital I/O / analog input channel 3 / A/D VREF+ |
| 腳位 7 | RA4/T0CKI — Digital I/O / Timer0 clock input |
| 腳位 8 | RA5/AN4/SS — Digital I/O / analog input channel 4 / SPI slave select |
| 腳位 9 | RA6 — Digital I/O |
| 腳位 10 | VDD — Positive supply voltage |
| 腳位 11 | VSS — Ground reference |
| 腳位 12 | RB0/INT0 — Digital I/O / external interrupt 0 |
| 腳位 13 | RB1/INT1 — Digital I/O / external interrupt 1 |
| 腳位 14 | RB2/INT2 — Digital I/O / external interrupt 2 |
| 腳位 15 | RB3/INT3 — Digital I/O / external interrupt 3 |
| 腳位 16 | RB4 — Digital I/O |
| 腳位 17 | RB5 — Digital I/O |
| 腳位 18 | RB6/PGC — Digital I/O / ICSP clock |
| 腳位 19 | RB7/PGD — Digital I/O / ICSP data |
| 腳位 20 | MCLR/VPP — Master clear reset / programming voltage |
| 腳位 21 | RC0/T1OSO — Digital I/O / Timer1 oscillator output |
| 腳位 22 | RC1/T1OSI — Digital I/O / Timer1 oscillator input |
| 腳位 23 | RC2/CCP1 — Digital I/O / Capture/Compare/PWM 1 |
| 腳位 24 | RC3/SCK/SCL — Digital I/O / SPI clock / I²C clock |
| 腳位 25 | RC4/SDI/SDA — Digital I/O / SPI data in / I²C data |
| 腳位 26 | RC5/SDO — Digital I/O / SPI data out |
| 腳位 27 | RC6/TX1/CK1 — Digital I/O / USART1 transmit / clock |
| 腳位 28 | RC7/RX1/DT1 — Digital I/O / USART1 receive / data |
| 腳位 29 | RD0 — Digital I/O / PSP data |
| 腳位 30 | RD1 — Digital I/O / PSP data |
| 腳位 31 | RD2 — Digital I/O / PSP data |
| 腳位 32 | RD3 — Digital I/O / PSP data |
| 腳位 33 | RD4 — Digital I/O / PSP data |
| 腳位 34 | RD5 — Digital I/O / PSP data |
| 腳位 35 | RD6 — Digital I/O / PSP data |
| 腳位 36 | RD7 — Digital I/O / PSP data |
| 腳位 37 | RE0/RD — Digital I/O / PSP read |
| 腳位 38 | RE1/WR — Digital I/O / PSP write |
| 腳位 39 | RE2/CS — Digital I/O / PSP chip select |
| 腳位 40 | AVDD — Analog positive supply |
| 腳位 41 | AVSS — Analog ground |
| 腳位 42 | RF0 — Digital I/O |
| 腳位 43 | RF1 — Digital I/O |
| 腳位 44 | RF2 — Digital I/O |
| 腳位 45 | RF3 — Digital I/O |
| 腳位 46 | RF4 — Digital I/O |
| 腳位 47 | RF5 — Digital I/O |
| 腳位 48 | RF6 — Digital I/O |
| 腳位 49 | RF7 — Digital I/O |
| 腳位 50 | RG0 — Digital I/O |
| 腳位 51 | RG1 — Digital I/O |
| 腳位 52 | RG2 — Digital I/O |
| 腳位 53 | RG3 — Digital I/O |
| 腳位 54 | RG4 — Digital I/O |
| 腳位 55 | RG5 — Digital I/O |
| 腳位 56 | VDD — Positive supply voltage |
| 腳位 57 | VSS — Ground reference |
| 腳位 58 | RH0 — Digital I/O / A/D channel |
| 腳位 59 | RH1 — Digital I/O / A/D channel |
| 腳位 60 | RH2 — Digital I/O / A/D channel |
| 腳位 61 | RH3 — Digital I/O / A/D channel |
| 腳位 62 | RH4 — Digital I/O / A/D channel |
| 腳位 63 | RH5/CCP6 — Digital I/O / A/D channel / CCP6 |
| 腳位 64 | RH6/CCP7 — Digital I/O / A/D channel / CCP7 |
| 腳位 65 | RH7 — Digital I/O / A/D channel |
| 腳位 66 | RJ0 — Digital I/O |
| 腳位 67 | RJ1 — Digital I/O |
| 腳位 68 | RJ2 — Digital I/O |
| 腳位 69 | RJ3 — Digital I/O |
| 腳位 70 | RJ4 — Digital I/O |
| 腳位 71 | RJ5 — Digital I/O |
| 腳位 72 | RJ6 — Digital I/O |
| 腳位 73 | RJ7 — Digital I/O |
| 腳位 74 | RK0 — Digital I/O / Parallel Slave Port data |
| 腳位 75 | RK1 — Digital I/O / Parallel Slave Port data |
| 腳位 76 | RK2 — Digital I/O / Parallel Slave Port data |
| 腳位 77 | RK3 — Digital I/O / Parallel Slave Port data |
| 腳位 78 | RK4 — Digital I/O / Parallel Slave Port data |
| 腳位 79 | RK5 — Digital I/O / Parallel Slave Port data |
| 腳位 80 | RK6 — Digital I/O / Parallel Slave Port data |
典型應用
PIC18F8720-I/PTC01 適用於 7 應用s: Industrial Automation Controllers, Building Automation and HVAC Systems, Automotive Body Electronics, Instrumentation and Data Acquisition, Embedded Connectivity Gateways, Legacy PIC17C76X OTP Replacement, Security and Access Control Panels.
Industrial Automation Controllers
The PIC18F8720-I/PTC01 fits industrial automation due to its 68 I/O pins, dual USART for Modbus RTU/ASCII, and I²C/SPI for sensor networks. With 128 KB Flash and 25 MHz core, it handles PLC scan routines, PID loop calculations, and HMI communication protocols in factory equipment. Its -40°C to +85°C industrial temperature range supports cabinet and field-deployed environments, while the 10-bit A/D with 16 channels reads multiple sensor inputs simultaneously.
推薦
Building Automation and HVAC Systems
For building automation, the PIC18F8720-I/PTC01's dual USART supports BACnet MS-TP or Modbus communication with building management systems, while I²C connects to temperature, humidity, and CO2 sensors. The 128 KB Flash stores HVAC control algorithms, scheduling logic, and fault diagnostics. External interrupt capability enables immediate response to safety-critical inputs like smoke detectors or emergency stops, critical for code-compliant commercial building control.
推薦
Automotive Body Electronics
In automotive body modules, the PIC18F8720-I/PTC01 controls lighting, door locks, mirror adjustment, and wiper systems. The 16-channel 10-bit A/D reads multiple analog sensors (battery voltage, ambient light, position feedback), while PWM modules drive LED arrays and motor actuators. Note: the -I/PT variant is industrial-grade (-40C to +85C); for AEC-Q100 automotive qualified alternatives, consider PIC18F86K22-I/PT or PIC18F8722-I/PT upgrade paths.
推薦
Instrumentation and Data Acquisition
The PIC18F8720-I/PTC01's 16-channel 10-bit A/D and 128 KB Flash make it ideal for multi-channel data acquisition systems recording sensor data with timestamped logs. Dual USART connects to PC or display terminals for real-time data streaming. The PIC18F8720T-E/PT extended-grade variant supports wider temperature ranges for field-deployed test equipment and laboratory instrumentation with high-channel-count measurement requirements.
推薦
Embedded Connectivity Gateways
The PIC18F8720-I/PTC01 serves as a protocol-conversion gateway between serial peripherals (USART, I²C, SPI) and higher-level networks. Its 3.75 KB RAM buffers incoming packets while 128 KB Flash holds protocol stacks for Modbus, custom serial protocols, or wireless module interfaces. The external interrupt source handles time-critical events from modems or RF transceivers in industrial IoT edge nodes and serial-to-Ethernet bridges.
推薦
Legacy PIC17C76X OTP Replacement
The PIC18F8720-I/PTC01 is functionally pin-compatible with the legacy PIC17C76X family of OTP microcontrollers, making it a Flash-based replacement for obsolete OTP designs. According to Microchip's product page, the PIC18F8720 has a pinout that is functionally compatible with the PIC17C76X, allowing engineers to migrate firmware without PCB changes. This saves costly board re-spins when transitioning legacy products to modern in-circuit-programmable silicon.
推薦
Security and Access Control Panels
For security panels, the PIC18F8720-I/PTC01 manages keypad inputs, RFID reader interfaces (via USART or SPI), and alarm output relays. The 128 KB Flash stores credential databases and access logic, while EEPROM retains configuration across power cycles. External interrupt sources handle tamper switches and panic buttons requiring immediate response, essential for UL-listed commercial intrusion detection systems.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F8720-I/PTC01 — 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 | PIC18F8720-I/PT | PIC18F8722-I/PT | PIC18F85K22-I/PT | PIC18F8620-I/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP (12x12 mm) | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same | 80-TQFP (12x12 mm) - same |
| Flash Memory | 128 KB | 128 KB | 128 KB | 32 KB | 64 KB |
| RAM Size | 3.75 KB | 3.75 KB | 3.9 KB | 2 KB | 3.75 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Max Clock Frequency | 25 MHz | 25 MHz | 40 MHz | 64 MHz | 40 MHz |
| Number of I/O Pins | 68 | 68 | 68 | 68 | 68 |
| A/D Converter | 10-bit, 16 ch | 10-bit, 16 ch | 10-bit, 16 ch | 10-bit, 16 ch | 10-bit, 16 ch |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Lifecycle Status | Obsolete | Obsolete | Active | Active | Obsolete |
主要差異化特點
- Functional pin compatibility with PIC17C76X OTP family (對比PIC17C76X (legacy OTP))
- Largest Flash density in original PIC18 family (對比PIC18F8620-I/PT (64 KB Flash))
- Tray packaging for low-volume and prototype use (對比PIC18F8720T-I/PT (tape and reel))
- Obsolete status with proven field deployment (對比PIC18F8722-I/PT (active modern variant))
設計說明
Place 100 nF ceramic decoupling capacitors within 5 mm of every VDD/VSS pair on the PIC18F8720-I/PTC01, plus one bulk 10 µF tantalum or ceramic capacitor at the package supply pin. The 80-TQFP has multiple VDD/VSS pins scattered across the package; trace each one to its nearest capacitor. Use a 4-layer PCB with dedicated ground and power planes to minimize digital switching noise coupling into the analog A/D inputs.
Route the external crystal traces (OSC1 and OSC2) symmetrically with equal length and width, surrounded by a grounded guard ring to minimize EMI pickup. Keep crystal traces short (<10 mm) and isolated from high-speed digital signals. Add a 1 MΩ resistor in parallel with the crystal to bias the inverter into its linear region. For PIC18F8720 designs with capacitive loading, follow the Microchip oscillator design guide and add appropriate load capacitors (typically 15-33 pF) to the crystal pins.
Common pitfalls with PIC18F8720-I/PTC01: (1) The /PTC01 suffix indicates tray packaging - some assembly houses require tube or tape-and-reel (PIC18F8720T-I/PT). (2) This part is in Obsolete status as of 2026-09-28 - for new designs use PIC18F8722-I/PT or PIC18F85K22-I/PT. (3) The MCLR pin must have a 10 kΩ pull-up to VDD or the device will not start; never leave it floating. (4) ICSP programming requires RB6/PGC and RB7/PGD pins to remain accessible on the PCB - do not lock them as outputs.
Estimated: At maximum 25 MHz operation with all 68 I/O pins switching at full capacitive load, the PIC18F8720-I/PTC01 in industrial -40°C to +85°C range draws approximately 60-80 mA. The 80-TQFP package has typical θJA of ~50°C/W with standard 4-layer PCB. For designs in enclosed housings without airflow, calculate junction temperature using T_J = TA + (PD × θJA) to ensure T_J stays below 125°C; use thermal vias under the exposed pad if available.
For reliable I²C and SPI communication on the PIC18F8720, keep clock traces short (<50 mm) and avoid running them parallel to noisy digital signals. Add 4.7 kΩ pull-ups on I²C SDA/SCL lines for 400 kHz Fast Mode operation. For SPI at high speeds (>5 MHz), use series termination resistors (33 Ω) at the SCK driver output to dampen reflections. The PIC18F8720 MSSP peripheral supports both I²C master/slave and SPI modes - configure TRIS bits correctly before enabling the module.
合規資訊
RoHS compliant per Microchip product documentation. Not AEC-Q100 qualified (industrial grade only); for automotive applications choose AEC-Q100 qualified PIC18F members. Lifecycle status: Obsolete as of 2026-09-28.
