PIC18F45K22-E/P - 8-bit MCU, 32KB Flash, 40MHz, PDIP-40 | Microchip
料号： PIC18F45K22-E/P ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.58 | $4.58 |
| 10 | $4.12 | $41.20 |
| 100 | $3.55 | $355.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.78 | $2,780.00 |
PIC18F45K22-E/P 概述
A PIC18 microcontroller is a member of Microchip's 8-bit enhanced Harvard-architecture MCU family, sitting between PIC16 (baseline/mid-range) and PIC24/dsPIC (16-bit) families. Within the broader taxonomy, PIC18 belongs to microcontrollers -> integrated circuits -> semiconductors. The 'K' family designation refers to parts with nanoWatt XLP ultra-low-power peripherals including low-power sleep modes (deep sleep, doze, idle), making the PIC18F45K22 a strong fit for battery- or energy-harvesting applications that still require mid-range processing throughput.
Key features of the PIC18F45K22-E/P include: 32KB Flash program memory with self-programmability, 256 bytes of EEPROM data memory, 1536 bytes SRAM, two Enhanced USART modules, two MSSP (SPI/I2C) modules, two 10-bit PWM modules with up to 14-bit resolution, and 30 analog input channels via the 12-bit ADC. The 'E' temperature grade suffix indicates the extended industrial temperature range of -40C to +125C, suitable for industrial and automotive under-hood environments. The 'P' package suffix specifies the 40-pin PDIP through-hole package for prototyping, breadboarding, and legacy manufacturing lines.
Architecturally, the PIC18F45K22 uses a RISC instruction set with 16-bit instructions and an 8-bit data path, featuring hardware multiplier and 31-level hardware stack. The integrated nanoWatt XLP technology provides sleep currents below 100 nA typical, while active current consumption at 1 MHz is approximately 220 uA/MHz.
Typical applications include industrial sensor interfaces, building automation controllers, low-power wireless sensor nodes, HVAC control panels, and battery-powered data loggers. The wide temperature range and XLP technology make it suitable for remote telemetry units and IoT edge devices operating from coin-cell or energy-harvested power sources.
Design consideration: when migrating from PDIP to surface-mount QFN/TQFP variants (e.g., PIC18F45K22-E/ML or PIC18F45K22-E/MV), verify peripheral pin-out mapping because QFN/TQFP pin assignments differ from PDIP. The 'E/P' combination specifically denotes extended temperature, PDIP-40 packaging.
This page synthesizes distributor pricing, drop-in replacement options, and practical design notes not found in a single manufacturer datasheet, with alternatives sourced from the verified Microchip PIC18F45K22 family and validated cross-references.
直接替换替代料： PIC18F45K22-E/P ——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： PIC18F45K22-E/P （相同外形与封装尺寸） ——差异在于 Package, Timers, ADC, Program Memory (Flash), Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC18F45K22-I/P
✅ 直接替换✓ 有现货
$2.1 / 个
查看数据手册 →PIC18F44K22-E/P
✅ 直接替换✓ 有现货
$2.32 / 个
查看数据手册 →PIC18F45K22-E/P 最大额定值与电气特性
| Architecture | 8-bit PIC18 (Harvard RISC) |
| Program Memory (Flash) | 32 KB |
| Data Memory (SRAM) | 1536 bytes |
| EEPROM Data Memory | 256 bytes |
| Maximum Clock Speed | 40 MHz (64 MHz instruction) |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| ADC Resolution | 12-bit |
| ADC Channels | Up to 30 analog inputs |
| PWM Modules | Two CCP/ECCP modules, up to 14-bit resolution |
| Communication Peripherals | 2x Enhanced USART, 2x MSSP (SPI/I2C) |
| Timers | Four 16-bit timers, one 8-bit timer |
| 工作温度范围 | -40C to +125C (Extended 'E' grade) |
| 封装 | PDIP-40 (P) |
| Low-Power Technology | nanoWatt XLP |
| RoHS 状态 | Compliant |
| 安装类型 | Through-Hole (DIP) |
PIC18F45K22-E/P 引脚配置
| 引脚 1 | MCLR/VPP/RE3 — Master Clear (reset) input / RE3 digital input |
| 引脚 2 | RA0/AN0/C1INA — PORTA bit 0 / ADC input 0 / comparator input |
| 引脚 3 | RA1/AN1/C2INA — PORTA bit 1 / ADC input 1 |
| 引脚 4 | RA2/AN2/VREF- — PORTA bit 2 / ADC input 2 / negative reference |
| 引脚 5 | RA3/AN3/VREF+ — PORTA bit 3 / ADC input 3 / positive reference |
| 引脚 6 | RA4/T0CKI/C1OUT — PORTA bit 4 / Timer0 clock input |
| 引脚 7 | RA5/AN4/SS1/C2OUT — PORTA bit 5 / ADC input 4 / SPI slave select |
| 引脚 8 | RE0/AN5 — PORTE bit 0 / ADC input 5 |
| 引脚 9 | RE1/AN6 — PORTE bit 1 / ADC input 6 |
| 引脚 10 | RE2/AN7 — PORTE bit 2 / ADC input 7 |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | VSS — Ground |
| 引脚 13 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock |
| 引脚 14 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output |
| 引脚 15 | RC0/SOSCO — PORTC bit 0 / secondary oscillator output |
| 引脚 16 | RC1/SOSCI — PORTC bit 1 / secondary oscillator input |
| 引脚 17 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 引脚 18 | RC3/SCL1/SCK1 — PORTC bit 3 / I2C clock / SPI clock |
| 引脚 19 | RD0/PSP0/AN8 — PORTD bit 0 / ADC input 8 |
| 引脚 20 | RD1/PSP1/AN9 — PORTD bit 1 / ADC input 9 |
| 引脚 21 | RD2/PSP2/AN10 — PORTD bit 2 / ADC input 10 |
| 引脚 22 | RD3/PSP3/AN11 — PORTD bit 3 / ADC input 11 |
| 引脚 23 | RC4/SDA1/SDI1 — PORTC bit 4 / I2C data / SPI data in |
| 引脚 24 | RC5/SDO1 — PORTC bit 5 / SPI data out |
| 引脚 25 | RC6/TX1/CK1 — PORTC bit 6 / USART1 TX / clock |
| 引脚 26 | RC7/RX1/DT1 — PORTC bit 7 / USART1 RX / data |
| 引脚 27 | RD4/PSP4/AN12 — PORTD bit 4 / ADC input 12 |
| 引脚 28 | RD5/PSP5/AN13 — PORTD bit 5 / ADC input 13 |
| 引脚 29 | RD6/PSP6/AN14 — PORTD bit 6 / ADC input 14 |
| 引脚 30 | RD7/PSP7/AN15 — PORTD bit 7 / ADC input 15 |
| 引脚 31 | VSS — Ground |
| 引脚 32 | VDD — Positive supply voltage |
| 引脚 33 | RB0/AN12/INT0 — PORTB bit 0 / external interrupt 0 |
| 引脚 34 | RB1/AN8/INT1 — PORTB bit 1 / external interrupt 1 |
| 引脚 35 | RB2/AN9/INT2 — PORTB bit 2 / external interrupt 2 |
| 引脚 36 | RB3/AN10/INT3 — PORTB bit 3 / external interrupt 3 |
| 引脚 37 | RB4/AN11 — PORTB bit 4 |
| 引脚 38 | RB5/AN13 — PORTB bit 5 |
| 引脚 39 | RB6/PGC/ICSPCLK — PORTB bit 6 / ICSP clock / programming |
| 引脚 40 | RB7/PGD/ICSPDAT — PORTB bit 7 / ICSP data / programming |
典型应用
PIC18F45K22-E/P 适用于 6 应用s: Industrial Sensor Interface Module, Building Automation Controller, Battery-Powered Data Logger, Automotive Under-Dash Module, Low-Power Wireless Sensor Node, HVAC Control Panel.
Industrial Sensor Interface Module
The PIC18F45K22-E/P is well suited for industrial sensor interface modules that aggregate 4-20 mA analog inputs, RTD thermocouples, and digital switch signals into a unified data stream. Its 12-bit ADC with up to 30 analog channels provides 4096-step resolution per measurement, while the 32 KB Flash comfortably holds protocol stacks for Modbus RTU, CAN, or RS-485 firmware plus application logic. The extended -40C to +125C temperature grade ensures operation in unconditioned factory cabinets, and the 36 I/O pins handle multiple sensor channels plus an RS-485 transceiver. At 40 MHz the device achieves 10 MIPS throughput, sufficient for 1 kHz control loop updates.
推荐
Building Automation Controller
For building automation controllers handling HVAC, lighting, and access control, the PIC18F45K22-E/P provides the right balance of memory, peripherals, and cost. The two Enhanced USARTs support simultaneous Modbus master and slave communication to field devices, while the MSSP modules drive I2C sensors and SPI displays. Its nanoWatt XLP sleep currents below 100 nA typical allow battery-backed wireless sensor nodes that run for years on a single lithium cell. The PDIP-40 package simplifies prototyping on perforated boards before transitioning to surface-mount for production, and the extended temperature grade handles equipment-room environments.
推荐
Battery-Powered Data Logger
Battery-powered data loggers benefit from the PIC18F45K22-E/P's nanoWatt XLP technology and 256 bytes of on-chip EEPROM for non-volatile parameter storage. The deep-sleep current draws under 100 nA typical, allowing multi-year operation on two AA alkaline cells when wake intervals are minutes apart. The 32 KB Flash stores logging firmware and lookup tables, while the 1536 bytes SRAM buffers sensor samples between writes. The 12-bit ADC digitizes analog channels at up to 100 ksps, and the CCP modules generate precise wake-up timing using the low-power Timer1 oscillator. Extended temperature grade supports outdoor environmental monitoring.
推荐
Automotive Under-Dash Module
The PIC18F45K22-E/P's extended -40C to +125C temperature rating qualifies it for under-dash automotive modules such as body controllers, climate interfaces, and accessory multiplexers. The 36 I/O pins drive multiple relays, read button matrices, and interface with LIN or CAN transceivers. The 32 KB Flash accommodates AUTOSAR-lite or proprietary automotive stacks, while the 12-bit ADC reads battery voltage and analog sensor channels with 4.2-5.5V supply tolerance matching 5V regulated vehicle rails. For AEC-Q100-qualified automotive designs, Microchip recommends PIC18F 'Q' or 'K42' variants instead, as this part is not formally automotive-qualified.
推荐
Low-Power Wireless Sensor Node
Low-power wireless sensor nodes based on PIC18F45K22-E/P leverage the nanoWatt XLP technology to minimize sleep current between transmissions. A typical design pairs the MCU with a sub-GHz transceiver (e.g., MRF89XA) over SPI, waking periodically to read sensors and transmit readings before returning to deep sleep. The 1536 bytes SRAM holds a packet buffer plus sensor history, while the 256-byte EEPROM retains calibration constants and node IDs across power cycles. The MSSP/SPI interface runs the wireless module, the Enhanced USART runs a debug console, and the ADC reads environmental sensors.
推荐
HVAC Control Panel
HVAC control panels integrate temperature, humidity, and pressure sensing with relay-driven fan, compressor, and damper control - a workload well matched to the PIC18F45K22-E/P. The 12-bit ADC with 30 channels reads multiple analog sensors simultaneously, while the two CCP/ECCP modules generate the PWM outputs that drive variable-speed fans and dampers. The Enhanced USARTs interface with Wi-Fi or Modbus modules for building management integration. With 32 KB Flash the device stores the user-interface state machine, scheduling logic, and fault diagnostics without external memory.
推荐
推荐产品汇总
工程参考数据： PIC18F45K22-E/P ——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 | PIC18F45K22-I/P | PIC18F44K22-E/P | PIC18F45K22-E/ML | PIC18F43K22-E/PT |
|---|---|---|---|---|---|
| Package | PDIP-40 | PDIP-40 (same) | PDIP-40 (same) | QFN-44 (different) | TQFP-44 (different) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 32 KB | 32 KB | 16 KB | 32 KB | 8 KB |
| RAM | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 1024 bytes |
| Maximum Clock Speed | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| Temperature Grade | Extended -40C to +125C | Industrial -40C to +85C | Extended -40C to +125C | Extended -40C to +125C | Extended -40C to +125C |
| I/O Pins | 36 | 36 | 36 | 36 | 36 |
关键差异点
- Extended -40C to +125C temperature grade on through-hole PDIP package （对比 PIC18F45K22-I/P)
- Highest Flash density in the K22 DIP-40 family （对比 PIC18F44K22-E/P)
- Through-hole PDIP-40 simplifies prototyping and hand assembly （对比 PIC18F45K22-E/ML (QFN-44))
设计说明
Estimated: At 40 MHz, 5V operation with all peripherals active, the PIC18F45K22-E/P typically draws ~12 mA. Add a 100 nF decoupling capacitor adjacent to each VDD/VSS pair (pins 11/12 and 31/32) and a bulk 10 uF tantalum at the board supply input. For battery applications, configure the nanoWatt XLP sleep modes (Sleep, Deep Sleep, Doze) to drop idle current below 100 nA typical.
Do not confuse the PIC18F45K22 (4.2-5.5V) with the PIC18LF45K22 (1.8-3.6V) - applying 5V to an LF part will damage it. The 'F' (Flash) suffix denotes 5V operation; 'LF' denotes 3.3V operation. Also note that migrating from the legacy PIC18F452 to PIC18F45K22 requires firmware updates because the K22 family has different register mappings and added peripherals like the ECCP and CWG modules.
For the 40-pin PDIP footprint use a 0.6 inch row spacing with 0.1 inch pin pitch (2.54 mm). Keep traces to OSC1/OSC2 short and surround them with a ground pour to reduce EMI. Place the ICSP programming header (MCLR, PGC, PGD, VDD, VSS) at the board edge for production programming access. The MCLR pin requires a 10 kohm pull-up to VDD and a 100 nF capacitor to ground for in-circuit programming reliability.
合规信息
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified; choose PIC18F 'Q' or 'K42' variants for automotive applications requiring formal qualification. Lead-free (Pb-free) reflow-compatible per Microchip packaging specifications.
