PIC18F85K22T-I/PTRSL - 8-bit 32KB Flash MCU, 80-pin TQFP | Microchip
MPN： PIC18F85K22T-I/PTRSL ✓ 啟用中PIC18F85K22T-I/PTRSL 概覽
An 8-bit microcontroller (MCU) is a compact, single-chip computer that combines a CPU, non-volatile program memory, volatile data memory, peripherals, and I/O in a single IC. PIC18 microcontrollers extend Microchip's baseline 8-bit PIC16 architecture with a 16-bit instruction word, 31-level hardware stack, linear memory addressing, and C-optimized instruction set, making them well suited for embedded control, sensor interfacing, and low-power IoT applications.
Key features include 70 general-purpose I/O pins, three 16-bit timers, four 8-bit timers, two CCP modules, three enhanced CCP (ECCP) modules for motor-control PWM, two MSSP ports for SPI/I2C, two EUSART modules for LIN/IrDA/RS-232, a 12-bit ADC with auto-acquisition, a 5-bit DAC, hardware multiplier, and CTMU for capacitive touch. With XLP, quiescent current drops to roughly 20 nA in sleep mode, supporting battery-powered products with multi-year lifetimes.
The PIC18F85K22 is implemented on Microchip's enhanced FLASH process and uses a Harvard bus with separate program and data paths. The 12-bit ADC includes auto-conversion and self-calibration, simplifying firmware. The CTMU converts a capacitance into a timing measurement, allowing capacitive buttons, sliders, and proximity sensors without external components.
Typical applications include industrial control panels, capacitive touch keypads, battery-powered sensor nodes, HVAC thermostats, and automotive body modules. The wide 1.8V-5.5V supply range and XLP low-power modes make it appropriate for portable instrumentation and remote monitoring. The part is also widely used in white goods and consumer appliances that need USB-free, robust, multi-channel analog and PWM I/O.
When designing with the PIC18F85K22T-I/PTRSL, ensure the Vcap pin has a 1uF-10uF decoupling capacitor, leave the 80-pin TQFP thermal pad floating or connected to ground per application note AN1079, and use MPLAB X IDE with the XC8 compiler for C development. Programming/debugging is performed through ICSP (2-wire or 4-wire) or via the ICD/PICkit tool family.
This page consolidates pricing, drop-in alternatives, and engineering notes beyond the manufacturer datasheet, helping procurement and design teams make faster, more informed decisions.
直接替換替代品，適用於 PIC18F85K22T-I/PTRSL — 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： PIC18F85K22T-I/PTRSL （相同外形與佔位） — 差異在於 Package, ADC, MSL Level, Timers, I/O Pins.
PIC18F85K22T-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85K22-I/PTRSL
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F85K22-E/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F86K22T-I/PTRSL
✅ 直接替換📋 參考替代品（不在目錄中）
PIC18F85J94-I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC18F85K22T-I/PTRSL 最大額定值與電氣特性
| Core | PIC18 8-bit RISC |
| Program Memory | 32 KB Flash |
| Data RAM | 2 KB |
| Data EEPROM | 1 KB |
| 資料匯流排寬度 | 8 bit |
| Maximum Clock Speed | 64 MHz |
| Instruction Throughput | 16 MIPS |
| 供應電壓 | 1.8 V to 5.5 V (operating) |
| I/O Pins | 70 |
| 封裝 | 80-pin TQFP (12x12 mm, 1 mm height) |
| ADC | 12-bit, up to 24 channels |
| DAC | 5-bit (internal) |
| Timers | 3 x 16-bit + 4 x 8-bit |
| PWM Modules | 3 x ECCP + 2 x CCP |
| Communication | 2 x MSSP (SPI/I2C), 2 x EUSART |
| Special Features | nanoWatt XLP, CTMU capacitive touch, ICSP |
| 工作溫度 | -40 C to +85 C (industrial) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 |
| RoHS 狀態 | Compliant |
PIC18F85K22T-I/PTRSL 腳位配置
| 腳位 1 | RE0 — Port E bit 0 / digital I/O |
| 腳位 2 | RE1 — Port E bit 1 / digital I/O |
| 腳位 3 | RE2 — Port E bit 2 / digital I/O |
| 腳位 4 | RE3 — Port E bit 3 / digital I/O |
| 腳位 5 | RE4 — Port E bit 4 / digital I/O |
| 腳位 6 | RE5 — Port E bit 5 / digital I/O |
| 腳位 7 | RE6 — Port E bit 6 / digital I/O |
| 腳位 8 | RE7 — Port E bit 7 / digital I/O |
| 腳位 9 | OSC1 — Oscillator input / CLKIN |
| 腳位 10 | OSC2 — Oscillator output / CLKOUT |
| 腳位 11 | VDD — Digital supply voltage (1.8-5.5 V) |
| 腳位 12 | VSS — Digital ground |
| 腳位 13 | RA0 — Port A bit 0 / AN0 |
| 腳位 14 | RA1 — Port A bit 1 / AN1 |
| 腳位 15 | RA2 — Port A bit 2 / AN2 |
| 腳位 16 | RA3 — Port A bit 3 / AN3 / VREF+ |
| 腳位 17 | RA4 — Port A bit 4 / AN4 |
| 腳位 18 | RA5 — Port A bit 5 / AN5 / VREF- |
| 腳位 19 | RA6 — Port A bit 6 / AN6 / OSC2 |
| 腳位 20 | RA7 — Port A bit 7 / AN7 / OSC1 |
| 腳位 21 | VSS — Digital ground |
| 腳位 22 | VDD — Digital supply voltage |
| 腳位 23 | RB0 — Port B bit 0 / INT0 / AN8 |
| 腳位 24 | RB1 — Port B bit 1 / INT1 / AN9 |
| 腳位 25 | RB2 — Port B bit 2 / INT2 / AN10 |
| 腳位 26 | RB3 — Port B bit 3 / INT3 / AN11 |
| 腳位 27 | RB4 — Port B bit 4 / KBI0 / AN12 |
| 腳位 28 | RB5 — Port B bit 5 / KBI1 / AN13 |
| 腳位 29 | RB6 — Port B bit 6 / KBI2 / PGC |
| 腳位 30 | RB7 — Port B bit 7 / KBI3 / PGD |
| 腳位 31 | VSS — Digital ground |
| 腳位 32 | VDD — Digital supply voltage |
| 腳位 33 | RC0 — Port C bit 0 / T1OSO |
| 腳位 34 | RC1 — Port C bit 1 / T1OSI |
| 腳位 35 | RC2 — Port C bit 2 / CCP1 |
| 腳位 36 | RC3 — Port C bit 3 / SCL1 |
| 腳位 37 | RC4 — Port C bit 4 / SDA1 |
| 腳位 38 | RC5 — Port C bit 5 / SDO1 |
| 腳位 39 | RC6 — Port C bit 6 / TX1 |
| 腳位 40 | RC7 — Port C bit 7 / RX1 |
| 腳位 41 | VSS — Digital ground |
| 腳位 42 | VDD — Digital supply voltage |
| 腳位 43 | RD0 — Port D bit 0 |
| 腳位 44 | RD1 — Port D bit 1 |
| 腳位 45 | RD2 — Port D bit 2 |
| 腳位 46 | RD3 — Port D bit 3 |
| 腳位 47 | RD4 — Port D bit 4 / ECCP2 |
| 腳位 48 | RD5 — Port D bit 5 / CCP3 |
| 腳位 49 | RD6 — Port D bit 6 / CCP4 |
| 腳位 50 | RD7 — Port D bit 7 / CCP5 |
| 腳位 51 | VSS — Digital ground |
| 腳位 52 | VDD — Digital supply voltage |
| 腳位 53 | RF0 — Port F bit 0 / AN16 |
| 腳位 54 | RF1 — Port F bit 1 / AN17 |
| 腳位 55 | RF2 — Port F bit 2 / AN18 |
| 腳位 56 | RF3 — Port F bit 3 / AN19 |
| 腳位 57 | RF4 — Port F bit 4 / AN20 |
| 腳位 58 | RF5 — Port F bit 5 / AN21 |
| 腳位 59 | RF6 — Port F bit 6 / AN22 |
| 腳位 60 | RF7 — Port F bit 7 / AN23 |
| 腳位 61 | AVDD — Analog supply voltage |
| 腳位 62 | AVSS — Analog ground |
| 腳位 63 | RH0 — Port H bit 0 / AN23 |
| 腳位 64 | RH1 — Port H bit 1 / AN22 |
| 腳位 65 | RH2 — Port H bit 2 / AN21 |
| 腳位 66 | RH3 — Port H bit 3 / AN20 |
| 腳位 67 | RH4 — Port H bit 4 |
| 腳位 68 | RH5 — Port H bit 5 |
| 腳位 69 | RH6 — Port H bit 6 |
| 腳位 70 | RH7 — Port H bit 7 |
| 腳位 71 | RJ0 — Port J bit 0 |
| 腳位 72 | RJ1 — Port J bit 1 |
| 腳位 73 | RJ2 — Port J bit 2 |
| 腳位 74 | RJ3 — Port J bit 3 |
| 腳位 75 | RJ4 — Port J bit 4 |
| 腳位 76 | RJ5 — Port J bit 5 |
| 腳位 77 | RJ6 — Port J bit 6 |
| 腳位 78 | RJ7 — Port J bit 7 |
| 腳位 79 | MCLR — Master Clear / Reset input (active low) |
| 腳位 80 | VCAP — Voltage regulator bypass capacitor |
典型應用
PIC18F85K22T-I/PTRSL 適用於 6 應用s: Industrial Control Panels, Capacitive Touch Keypads, Battery-Powered Sensor Nodes, HVAC Thermostats, White Goods and Consumer Appliances, Automotive Body Modules.
Industrial Control Panels
The PIC18F85K22T-I/PTRSL is well suited to industrial control panels thanks to its 70 general-purpose I/O pins, 12-bit ADC with up to 24 channels, and three enhanced CCP modules for PWM control of relays, solenoids, and motor drivers. Running at 64 MHz (16 MIPS) it can scan a 4x5 keypad, drive a character LCD, and refresh indicator LEDs while still handling serial communication. The wide 1.8-5.5 V supply simplifies integration with 24 V industrial bus systems via a step-down converter, and the CTMU enables sealed capacitive touch keys for the panel surface. Its PIC18F87K22 family pin compatibility allows designers to scale up to 128 KB Flash for more complex HMI projects.
推薦
Capacitive Touch Keypads
The PIC18F85K22T-I/PTRSL integrates a Charge Time Measurement Unit (CTMU) that converts capacitance differences into precise time measurements, enabling capacitive buttons, sliders, and proximity sensors without dedicated touch ICs. The 70 I/O pins can drive up to 30 touch electrodes with proper PCB layout, while the 12-bit ADC measures baseline capacitance for environmental compensation. Combined with nanoWatt XLP technology (~20 nA sleep), the part supports battery-powered remote controls and wireless keypads with multi-year coin-cell life. The CTMU and configurable timer system reduce BOM cost compared to dedicated touch controllers.
推薦
Battery-Powered Sensor Nodes
With nanoWatt XLP technology delivering sleep currents down to roughly 20 nA, the PIC18F85K22T-I/PTRSL is ideal for wireless sensor nodes running on coin cells or 2x AA batteries. The 12-bit ADC and 24-channel input allow multi-sensor reading (temperature, humidity, light, voltage) with minimal external signal conditioning. EUSART peripherals support low-power UART-based radios and LIN-bus sub-networks, while the MSSP ports handle SPI/I2C sensors such as accelerometers or environmental sensors. The 1.8 V minimum supply lets the device run directly from a single lithium primary cell down to end-of-life.
推薦
HVAC Thermostats
The PIC18F85K22T-I/PTRSL is a strong choice for HVAC thermostats that require multiple analog inputs (temperature, humidity, setpoint dial) and PWM outputs to drive triac-controlled fans and dampers. The ECCP modules generate the zero-cross PWM needed for quiet AC phase control, while the 12-bit ADC reads NTC thermistors with hardware averaging. The CTMU supports capacitive setpoint wheels and glass-front touch keys. With XLP sleep, the thermostat can keep the display alive while drawing less than 100 uA idle, meeting Energy Star standby targets.
推薦
White Goods and Consumer Appliances
Washing machines, dishwashers, ovens, and coffee makers use the PIC18F85K22T-I/PTRSL to coordinate motors, heaters, valves, and user interfaces in a single MCU. The three ECCP modules drive brushless DC and stepper motors for inverter compressors, the 12-bit ADC monitors temperature and water level sensors, and the EUSART modules provide LIN-bus connectivity to module sub-assemblies. Wide 1.8-5.5 V operation allows direct connection to rectified mains-derived rails. AEC-Q100 qualified variants (PIC18F85K22-E/PTRSL) simplify automotive body module designs.
推薦
Automotive Body Modules
The automotive-qualified PIC18F85K22-E/PTRSL variant (AEC-Q100, -40 C to +125 C) supports body control modules driving lighting, mirror adjust, wiper control, and door lock actuators. LIN bus via EUSART connects door and seat modules, while the 12-bit ADC reads battery voltage, current sensing, and ambient light sensors. PWM outputs drive LED lighting drivers directly. The wide supply range tolerates load-dump and cranking transients on the 12 V automotive bus. Pin compatibility with the PIC18F87K22 family provides a path to add CAN-FD or Ethernet modules later.
推薦
推薦產品摘要
工程參考資料，適用於 PIC18F85K22T-I/PTRSL — 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 | PIC18F85K22T-I/PT | PIC18F85K22-I/PTRSL | PIC18F85K22-E/PT | PIC18F86K22T-I/PTRSL | PIC18F85J94-I/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-pin TQFP (12x12 mm, tape & reel) | 80-pin TQFP (tray) | 80-pin TQFP (tape & reel) | 80-pin TQFP (tray, AEC-Q100) | 80-pin TQFP (tape & reel) | 80-pin TQFP (tray) |
| Flash Memory | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 3 KB | 2 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB |
| Operating Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.0 V to 3.6 V |
| Max Clock Speed | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| AEC-Q100 Qualified | No (industrial grade) | No | No | Yes | No | No |
| nanoWatt XLP | Yes (~20 nA sleep) | Yes | Yes | Yes | Yes | No |
主要差異化特點
- Lowest cost entry to the PIC18F87K22 family with 80-pin TQFP compatibility (對比PIC18F86K22T-I/PTRSL)
- nanoWatt XLP technology delivers 20 nA sleep current (對比PIC18F85J94-I/PT)
- 1.8 V-5.5 V wide supply range simplifies single-cell designs (對比PIC18F85J94-I/PT)
設計說明
The PIC18F85K22T-I/PTRSL requires a decoupling capacitor of 100 nF placed within 5 mm of each VDD/VSS pair, plus a bulk 10 uF tantalum on the VDD rail. The VCAP pin (pin 80) MUST have a 1 uF to 10 uF low-ESR ceramic capacitor to ground for the internal voltage regulator. For XLP sleep-mode designs below 1 uA total system draw, isolate the ADC supply (AVDD/AVSS) and switch off unused peripherals via firmware to avoid quiescent leakage.
For CTMU capacitive touch designs, the touch electrode traces should be 0.2-0.5 mm wide, surrounded by a ground guard ring, and routed away from switching signals. Keep ADC traces short, route analog (AVDD/AVSS) on a separate analog ground island joined at a single point to digital ground, and use a 4-layer PCB with a dedicated ground plane for best ADC performance and noise immunity. Avoid routing digital signals under the TQFP-80 thermal pad - either float it or stitch it to ground via 4 vias.
Do NOT forget the MCLR pull-up resistor (typically 10 kOhm) when designing reset circuitry, and ensure the ICSP programming lines (PGC/PGD on RB6/RB7) are not loaded down by external circuitry during debug. The PIC18F85K22T-I/PTRSL industrial temperature suffix 'I' only guarantees -40 C to +85 C; for -40 C to +125 C extended or AEC-Q100 automotive, choose the PIC18F85K22-E/PTRSL variant. Configuration bits must be programmed correctly to enable the internal oscillator and disable unused peripherals to meet XLP current targets.
Estimated: At full 64 MHz operation with all peripherals active and 70 I/O toggling at 20 mA per pin source, the TQFP-80 part dissipates roughly 0.4-0.6 W. With theta_JA of approximately 50 C/W on a 4-layer JEDEC test board, junction temperature rise is 20-30 C above ambient. For high-ambient industrial environments (>70 C) add thermal vias under the package thermal pad or reduce clock speed to keep Tj below 125 C.
合規資訊
RoHS compliant per Microchip product page. Industrial temperature grade only (-40 C to +85 C); for AEC-Q100 automotive qualified parts use the PIC18F85K22-E/PTRSL variant.
