PIC18F27K40-I/SP - 64MHz 8-bit MCU 128KB Flash 28-SPDIP | Microchip
料号： PIC18F27K40-I/SP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.07 | $4.07 |
| 10 | $3.66 | $36.60 |
| 100 | $3.25 | $325.00 |
| 500 | $2.93 | $1,465.00 |
| 1,000 | $2.61 | $2,610.00 |
PIC18F27K40-I/SP 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and configurable I/O peripherals on one die. The PIC18 family uses an 8-bit modified Harvard architecture with separate program and data buses, optimized for deterministic interrupt response and low-power operation. Within Microchip's taxonomy, the PIC18F27K40 belongs to the PIC18 "K-series" (low-power, XLP, 5 V tolerant) and is upward-compatible with the PIC16 instruction set, allowing code reuse from older designs.
Key feature highlights include 64 MHz maximum CPU clock (16 MIPS), 1.8 V to 5.5 V wide operating voltage range, eXtreme Low Power (XLP) modes with nanoWatt technology for sleep currents in the sub-microamp region, and 36 instruction-set additions over baseline PIC18. The 28-SPDIP package supports through-hole assembly and breadboard-friendly prototyping, while rich Core Independent Peripherals (CIPs) such as CWG, Windowed WWDT, CRC/SCAN memory scan, PWM/CCP, ZCD, EUSART, SPI/I2C, a 10-bit ADC with Computation (ADCC), and a 5-bit DAC offload tasks traditionally handled by the CPU.
Architecturally the device leverages CIPs - CWG, PWM, CCP, ADCC, CRC/SCAN, ZCD - to deliver deterministic event-driven behaviour and lower active-mode CPU loading. Peripheral Pin Select (PPS) remapping simplifies PCB routing by allowing most digital peripherals to be mapped to multiple pins, while the ADC inputs remain on fixed pins.
Typical applications include industrial sensor nodes, low-power IoT endpoints, battery-powered home automation, automotive body and aftermarket modules (sub-system level), and consumer white goods with touch or display interfaces. The 5 V tolerance makes it well-suited to legacy 5 V analog front-ends that still dominate HVAC, appliance, and industrial sensor designs.
When designing with this part, plan the Peripheral Pin Select (PPS) map early - most digital peripherals are remappable, but ADC inputs are not. Allocate adequate decoupling (100 nF per VDD pair) and reserve a robust in-circuit serial programming (ICSP) header for production-line firmware updates. This page consolidates current distributor pricing and pin-compatible alternatives not summarized in the manufacturer datasheet.
直接替换替代料： PIC18F27K40-I/SP ——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： PIC18F27K40-I/SP （相同外形与封装尺寸） ——差异在于 ADC, Package, Communication, Comparators, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC18F26K40-I/SP
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F27K40-E/SP
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F26K40-E/SP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18F27K42-I/SP
✅ 直接替换✓ 有现货
$2.62 / 个
查看数据手册 →PIC18F27K40-I/SP 最大额定值与电气特性
| Core Architecture | PIC18 8-bit modified Harvard |
| CPU Speed | 64 MHz max (16 MIPS) |
| Program Memory (Flash) | 128 KB (64K x 16) |
| SRAM | 4 KB |
| EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 5.5 V |
| 工作温度范围 | -40 C to +85 C (Industrial) |
| 封装 | 28-pin SPDIP (Skinny Plastic DIP) |
| 引脚数量 | 28 |
| 安装类型 | Through-Hole |
| ADC | 10-bit with Computation (ADCC) |
| DAC | 5-bit |
| Communication | EUSART, SPI, I2C |
| Core Independent Peripherals | CWG, PWM, CRC/SCAN, ZCD, WWDT, PPS |
| Low-Power Mode | XLP nanoWatt technology |
| Instruction Set Extensions | 36 additions over baseline PIC18 |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
PIC18F27K40-I/SP 引脚配置
| 引脚 1 | RA0 — PORTA bit 0 / analog input |
| 引脚 2 | RA1 — PORTA bit 1 / analog input |
| 引脚 3 | RA2 — PORTA bit 2 / analog input |
| 引脚 4 | RA3 — PORTA bit 3 / analog input / Vref+ |
| 引脚 5 | RA4 — PORTA bit 4 / analog input |
| 引脚 6 | RA5 — PORTA bit 5 / analog input |
| 引脚 7 | RA6 — PORTA bit 6 / oscillator |
| 引脚 8 | RA7 — PORTA bit 7 / oscillator |
| 引脚 9 | VSS — Ground reference |
| 引脚 10 | VDD — Positive supply (1.8 V to 5.5 V) |
| 引脚 11 | RB0 — PORTB bit 0 / analog input |
| 引脚 12 | RB1 — PORTB bit 1 / analog input |
| 引脚 13 | RB2 — PORTB bit 2 / analog input |
| 引脚 14 | RB3 — PORTB bit 3 / analog input |
| 引脚 15 | RB4 — PORTB bit 4 |
| 引脚 16 | RB5 — PORTB bit 5 |
| 引脚 17 | RB6 — PORTB bit 6 / ICSP clock |
| 引脚 18 | RB7 — PORTB bit 7 / ICSP data |
| 引脚 19 | RC0 — PORTC bit 0 |
| 引脚 20 | RC1 — PORTC bit 1 |
| 引脚 21 | RC2 — PORTC bit 2 |
| 引脚 22 | RC3 — PORTC bit 3 |
| 引脚 23 | RC4 — PORTC bit 4 |
| 引脚 24 | RC5 — PORTC bit 5 |
| 引脚 25 | RC6 — PORTC bit 6 |
| 引脚 26 | RC7 — PORTC bit 7 |
| 引脚 27 | VSS — Ground reference |
| 引脚 28 | VDD — Positive supply (1.8 V to 5.5 V) |
典型应用
PIC18F27K40-I/SP 适用于 6 应用s: Industrial Sensor Nodes, Low-Power IoT Endpoints, Battery-Powered Home Automation, Automotive Body and Aftermarket Modules, Consumer White Goods with Touch or Display, Legacy 5 V Analog Front-End Interfaces.
Industrial Sensor Nodes
The PIC18F27K40-I/SP fits industrial sensor nodes because its 10-bit ADCC with Computation offloads averaging, threshold detection, and oversampling from the CPU, freeing cycles for protocol handling. The 128 KB Flash accommodates MODBUS RTU, custom PID control loops, and on-device calibration tables, while the wide 1.8-5.5 V supply lets a single part run from 3.3 V digital sensors and 5 V analog front-ends. XLP sleep currents in the sub-microamp region extend battery life in remote pressure, temperature, and flow transmitters. The 28-SPDIP package supports through-hole assembly on legacy industrial backplanes, and PPS remapping simplifies PCB routing when assigning ADC channels and SPI/I2C buses to physical pins.
推荐
Low-Power IoT Endpoints
The PIC18F27K40-I/SP suits battery-powered IoT endpoints because XLP nanoWatt technology drops sleep current to the sub-microamp region, enabling multi-year coin-cell life for door sensors, asset trackers, and environmental monitors. The 64 MHz CPU wakes quickly to transmit LoRa, Sub-GHz, or BLE packets, then returns to sleep. The 5 V tolerance simplifies interface to 5 V sensor ASICs and legacy industrial wiring without level shifters. CIPs like CWG, ZCD, and WWDT run autonomously, allowing the CPU to remain in deep sleep longer. The 28-SPDIP package is breadboard-friendly for prototype IoT development, and the 128 KB Flash supports TLS-lite stacks or LoRaWAN stacks plus firmware over-the-air update space.
推荐
Battery-Powered Home Automation
The PIC18F27K40-I/SP is well-suited to battery-powered home automation such as wireless thermostats, motorized valve controllers, and door/window sensors. Its XLP modes and fast wake-from-sleep on peripheral interrupts make it ideal for event-driven designs that spend 99% of the time in sleep. The 128 KB Flash supports Zigbee or BLE stacks plus proprietary RF protocols, while the 5 V tolerance interfaces directly to common relay drivers and 5 V analog front-ends. On-chip 10-bit ADCC with Computation handles battery voltage monitoring without external components. The 28-SPDIP industrial temperature grade covers indoor climate extremes from cold garages to hot attics.
推荐
Automotive Body and Aftermarket Modules
The PIC18F27K40-I/SP supports automotive body and aftermarket modules at the sub-system level, where its wide 1.8-5.5 V supply tolerates load-dump transients and 12 V battery drops common in vehicle wiring harnesses. The 128 KB Flash runs CAN-based protocols or LIN slave stacks, plus application logic for body controllers, seat heaters, mirror adjusters, and aftermarket alarm systems. CIPs like CWG and PWM generate precise motor-drive signals without CPU intervention, while the 10-bit ADCC reads multiple sensor inputs simultaneously. The E-grade variant (-40 to +125 C) handles under-hood or dashboard environments where standard industrial grades would fail. The 28-SPDIP package suits prototype automotive design through-hole assembly.
推荐
Consumer White Goods with Touch or Display
The PIC18F27K40-I/SP is a strong fit for consumer white goods such as washing machines, dishwashers, refrigerators, and microwave ovens that need touch interfaces or simple character displays. The 128 KB Flash supports state-machine UI logic, motor-control profiles, and fault-diagnostic menus. The 5 V tolerance interfaces with legacy 5 V display drivers and LED indicator arrays, while the on-chip 5-bit DAC drives contrast or backlight brightness. The 10-bit ADCC with Computation reads multiple temperature, level, and motor-current sensors. CIPs like PWM and CWG generate appliance-grade motor-drive signals. The 28-SPDIP industrial temperature grade covers the wide thermal ranges of white-goods enclosures.
推荐
Legacy 5 V Analog Front-End Interfaces
The PIC18F27K40-I/SP excels at interfacing legacy 5 V analog front-ends because its I/O pins are 5 V tolerant on a 1.8-5.5 V supply. This lets a single MCU read industrial 4-20 mA loops, 0-10 V process signals, and 5 V logic sensors without level shifters or external protection. The 128 KB Flash runs industrial protocol stacks (HART, MODBUS, Profibus) plus application logic. The on-chip 10-bit ADCC with Computation provides averaging and threshold detection for noisy industrial signals, while the 5-bit DAC generates 0-10 V reference signals or bias voltages. The 28-SPDIP industrial temperature grade survives factory-floor extremes, and the 64 MHz CPU processes multiple sensor inputs in real time.
推荐
推荐产品汇总
工程参考数据： PIC18F27K40-I/SP ——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 | PIC18F26K40-I/SP | PIC18F27K40-E/SP | PIC18F27K42-I/SP |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Flash Memory | 128 KB | 64 KB | 128 KB | 128 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB |
| EEPROM | 256 B | 256 B | 256 B | 1 KB |
| CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +125 C (Extended) | -40 C to +85 C |
| 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 |
| Lifecycle Status | Active | Active | Active | Active |
关键差异点
- Largest Flash in 28-pin PIC18 K-series （对比 PIC18F26K40-I/SP)
- Extended temperature option in identical footprint （对比 PIC18F26K40-I/SP)
- Proven K-series core with rich CIP set （对比 PIC18F27K42-I/SP)
设计说明
Decouple each VDD pin with a 100 nF ceramic capacitor placed within 2 mm of the pin. Add a bulk 10 uF tantalum or ceramic capacitor on the main supply rail to handle transient current demands during Flash programming and ADC conversion bursts. Estimated: at 64 MHz active and 5 V supply, peak current reaches approximately 8 mA; a 10 uF bulk cap maintains voltage within 5% during 1 ms scan bursts.
Plan the Peripheral Pin Select (PPS) map early in your design. Most digital peripherals (EUSART, SPI, I2C, PWM outputs) are remappable to many pins, but ADC inputs are restricted to specific PORTB and PORTA pins. Allocate the analog-capable pins for ADC channels first, then map digital peripherals to remaining pins using PPS configuration words. Reversing this order often forces costly PCB respins.
Reserve a robust 5-pin ICSP header (VPP, VDD, VSS, PGD, PGC) accessible without removing the MCU from the board. The PIC18F27K40 uses RB6 as PGC and RB7 as PGD - do not assign these pins to high-frequency signals that block programming access. Production-line firmware updates require this header; omitting it forces board-level rework for any firmware revision.
The 28-SPDIP package has low thermal resistance due to its through-hole lead frame, but at maximum 64 MHz CPU speed and 5 V supply, internal power dissipation reaches approximately 50-80 mW. For enclosed industrial enclosures above +60 C ambient, derate CPU clock to 32 MHz or add thermal vias beneath any nearby ground plane to keep junction temperature below +125 C.
合规信息
RoHS and REACH compliant per Microchip product page. Lead-free and halogen-free packaging. AEC-Q100 not applicable for industrial-grade part; see PIC18F27K40-E/SP for extended temp range or contact Microchip for AEC-Q100 automotive qualified variants.
