PIC18F47K42-I/ML - 128KB Flash 8-bit MCU | Microchip QFN-44
料号： PIC18F47K42-I/ML ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.16 | $416.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.32 | $3,320.00 |
PIC18F47K42-I/ML 概述
An 8-bit microcontroller (MCU) is a single-chip processor that combines a CPU, program memory (Flash), data memory (RAM), non-volatile storage (EEPROM), and multiple peripherals (timers, ADC, communication ports) onto one silicon die. The PIC18F47K42 belongs to the Microchip PIC18 family, which sits in the wider hierarchy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The 'F' prefix denotes Flash program memory; the '47' identifies the 128 KB memory tier and 44-pin logic; the 'K42' family adds Core Independent Peripherals (CIPs) such as CLC, NCO, PWM with DMA trigger and intelligent analog features for mixed-signal embedded designs.
Key features include XLP (eXtra Low Power) sleep currents in the nanoamp range, 36 MIPS performance, vectored interrupts with priority levels, four 16-bit timers, four CCP/ECCP modules, two I2C, two SPI, two UART/A/EART, up to 36 GPIO, and on-chip debug via ICD. The 12-bit ADC2 supports up to 35 channels with automated accumulation, averaging, threshold comparison, and hardware Capacitive Voltage Divider (CVD) touch support, simplifying sensor and human-interface designs.
Typical applications include consumer white goods, IoT sensor nodes, low-power industrial controllers, automotive body and interior modules (non-safety), and USB/HID bridges via the UART/USB-capable PPS pin mapping. The wide 2.3V-5.5V VDD range and nanoWatt XLP sleep modes also suit battery-powered remote controls, wearables, and metering equipment.
When designing with this part, populate the PPS (Peripheral Pin Select) registers early in firmware to lock GPIO mapping before peripheral bring-up. Always decouple VDD with a 100 nF X7R cap within 2 mm of each power pin, plus a bulk 10 uF tantalum or ceramic, and keep the QFN-44 EP (exposed pad) soldered to a 4 mm x 4 mm minimum thermal pad with at least eight thermal vias for thermal and ground integrity.
直接替换替代料： PIC18F47K42-I/ML ——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： PIC18F47K42-I/ML （相同外形与封装尺寸） ——差异在于 Package, Comparators, ADC, DAC, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC18F47K42-E/ML
✅ 直接替换✓ 有现货
$2.54 / 个
查看数据手册 →PIC18F47K42-I/PT
✅ 直接替换✓ 有现货
$2.04 / 个
查看数据手册 →PIC18F46K42-I/ML
✅ 直接替换✓ 有现货
$1.97 / 个
查看数据手册 →PIC18F47K40-I/ML
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F45K42-I/ML
✅ 直接替换✓ 有现货
$2.45 / 个
查看数据手册 →PIC18F47K42-I/ML 最大额定值与电气特性
| Program Memory Type | Flash |
| Program Memory Size | 128 KB (64K x 16 words) |
| SRAM | 8 KB |
| EEPROM | 1 KB |
| CPU Core | PIC18 enhanced mid-range 8-bit |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Operating Voltage Range | 2.3 V to 5.5 V |
| ADC | 12-bit ADC2 with computation, up to 35 channels |
| DAC | 5-bit and 8-bit DAC outputs |
| Comparators | 3 analog comparators with selectable reference |
| DMA | Multi-channel DMA controller |
| Timers | 4 x 16-bit and 2 x 8-bit timers |
| PWM / CCP | 4 CCP/ECCP modules (16-bit resolution) |
| Communication | 2x UART, 2x I2C, 2x SPI |
| GPIO | Up to 36 programmable I/O with PPS |
| 封装 | 44-lead QFN (ML) with wettable flanks, 8x8 mm |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial, 'I' suffix) |
| RoHS 状态 | Compliant |
PIC18F47K42-I/ML 引脚配置
| 引脚 1 | RA0/AN0/C1IN0+/DAC5OUT — Analog/Digital I/O with ADC2 ch0, Comparator 1 input, DAC5 output |
| 引脚 2 | RA1/AN1/C1IN1-/DAC6OUT — Analog/Digital I/O, comparator input, DAC6 output |
| 引脚 3 | RA2/AN2/C1IN2+/VREF+ — Analog/Digital I/O, ADC2 ch2, external VREF+ |
| 引脚 4 | RA3/AN3/C1IN3- — Analog/Digital I/O, comparator reference |
| 引脚 5 | RA4/AN4/C2IN-/T0CKI — Analog/Digital I/O, Timer0 clock input |
| 引脚 6 | RA5/AN5/C2IN+/T1CKI — Analog/Digital I/O, Timer1 clock input |
| 引脚 7 | RA6/AN6/C3IN+/OSC1 — Oscillator input / Analog/Digital I/O |
| 引脚 8 | RA7/AN7/C3OUT/OSC2 — Oscillator output / Analog/Digital I/O |
| 引脚 9 | GND — Ground reference |
| 引脚 10 | RD0/INT0/CCP1 — Digital I/O, external interrupt 0, CCP1 |
| 引脚 11 | RD1/INT1 — Digital I/O, external interrupt 1 |
| 引脚 12 | RD2/INT2 — Digital I/O, external interrupt 2 |
| 引脚 13 | RD3/INT3 — Digital I/O, external interrupt 3 |
| 引脚 14 | RD4/RX1/DT1/SDI1 — UART1 RX, SPI1 data in (PPS) |
| 引脚 15 | RD5/TX1/CK1/SDO1 — UART1 TX, SPI1 clock / data out (PPS) |
| 引脚 16 | RD6/SS1 — SPI1 slave select |
| 引脚 17 | RD7 — Digital I/O |
| 引脚 18 | VSS — Digital ground |
| 引脚 19 | VDD — Digital supply voltage 2.3-5.5 V |
| 引脚 20 | RB0/AN12/CCP2 — Analog/Digital I/O, ADC2 ch12, CCP2 |
| 引脚 21 | RB1/AN10/C3IN1+ — Analog/Digital I/O, comparator input |
| 引脚 22 | RB2/AN8/C3IN2-/SDA2 — Analog/Digital I/O, I2C2 data |
| 引脚 23 | RB3/AN9/C3IN3-/SCL2 — Analog/Digital I/O, I2C2 clock |
| 引脚 24 | RB4/AN11/CTS1/C3OUT/SDO2 — Analog/Digital I/O, UART1 CTS, SPI2 data out |
| 引脚 25 | RB5/AN13/RTS1/C2OUT/SDI2 — Analog/Digital I/O, UART1 RTS, SPI2 data in |
| 引脚 26 | RB6/ICSPCLK — In-Circuit Serial Programming clock |
| 引脚 27 | RB7/ICSPDAT — In-Circuit Serial Programming data |
| 引脚 28 | RC0/AN16/SOSC1 — Analog/Digital I/O, secondary oscillator in |
| 引脚 29 | RC1/AN17/SOSC2 — Analog/Digital I/O, secondary oscillator out |
| 引脚 30 | RC2/AN14/CMP3IN2- — Analog/Digital I/O |
| 引脚 31 | RC3/AN15 — Analog/Digital I/O |
| 引脚 32 | RC4/RX2/SDA1/SDI1 — UART2 RX, I2C1 data (PPS) |
| 引脚 33 | RC5/TX2/SCL1/SCK1 — UART2 TX, I2C1 clock (PPS) |
| 引脚 34 | RC6/RX1 — Default UART1 RX mapping (also PPS) |
| 引脚 35 | RC7/TX1 — Default UART1 TX mapping (also PPS) |
| 引脚 36 | RE0/AN18/PWM5 — Analog/Digital I/O, PWM5 output |
| 引脚 37 | RE1/AN19/PWM6 — Analog/Digital I/O, PWM6 output |
| 引脚 38 | RE2/AN20/PWM7 — Analog/Digital I/O, PWM7 output |
| 引脚 39 | RE3/AN21/PWM8 — Analog/Digital I/O, PWM8 output |
| 引脚 40 | AVDD — Analog supply voltage (must equal VDD) |
| 引脚 41 | AVSS — Analog ground reference |
| 引脚 42 | RB0 (alt) — [DATA_NEEDED: package-specific pin function verification] |
| 引脚 43 | RB1 (alt) — [DATA_NEEDED: package-specific pin function verification] |
| 引脚 44 | EP — Exposed thermal pad - connect to ground for thermal and ground integrity |
典型应用
PIC18F47K42-I/ML 适用于 6 应用s: Low-Power IoT Sensor Nodes, Consumer White Goods and Home Appliances, Industrial Control and Sensor Hubs, Capacitive Touch and HMI Front Panels, Automotive Body and Interior Modules, USB HID and Bridge Adapters.
Low-Power IoT Sensor Nodes
The PIC18F47K42-I/ML fits battery-powered IoT sensor hubs because its 64 MHz PIC18 core delivers 16 MIPS so the MCU can wake, sample and transmit in microamps, not just microseconds, while its XLP (eXtra Low Power) nanoWatt sleep modes drop quiescent current under 100 nA with RTC running. With 8 KB SRAM the part can buffer ADC2 double-buffered sensor reads while the DMA controller autonomously moves them to UART TX - the CPU stays in sleep until transmission completes. The 2.3 V-5.5 V range covers both single-cell Li-ION and 3.3 V regulated supplies, making it a strong default for Zigbee, LoRa or Sub-GHz sensor front-ends in a QFN-44 8x8 mm footprint that fits 4-layer coin-cell sensor PCBs.
推荐
Consumer White Goods and Home Appliances
The PIC18F47K42-I/ML suits dishwasher, washing-machine and induction-cooktop HMIs where 128 KB Flash fits a graphical UI with capacitive touch. The 12-bit ADC2 with hardware accumulation oversamples touch sensors 16x automatically, freeing CPU bandwidth for motor-control loops. Up to 36 GPIO via PPS lets designers route UI key-scan, UART, I2C sensor, and 4 PWM outputs (CCP/ECCP) on any pin without PCB re-spin, and the 44-pin QFN (ML) wettable flanks guarantee IPC-A-610 inspection on high-volume SMT lines. The +85C industrial grade supports cabinet-mounted designs with ambient up to 70C.
推荐
Industrial Control and Sensor Hubs
Factory automation uses the PIC18F47K42-I/ML because the vectored-interrupt controller combined with DMA lets ADC2, comparators and PWM trigger each other without firmware latency, perfect for sub-millisecond control loops in valve drivers, conveyor sorters and HVAC actuators. Three analog comparators with selectable internal reference handle 4-20 mA loop thresholds or over-current trips in hardware, so the firmware stays simple. The PPS peripheral pin select allows the same QFN-44 board to be re-targeted for digital, analog or mixed-signal daughter-cards, reducing the SKU count and BOM cost for industrial customers needing per-channel interface variants.
推荐
Capacitive Touch and HMI Front Panels
The PIC18F47K42-I/ML offers hardware CVD (Capacitive Voltage Divider) touch support in the 12-bit ADC2, allowing a single MCU to scan a 12-key or 24-key projected-capacitive panel without an external touch controller, reducing BOM by 30-50 cents per board. The DMA controller scans each key in the background, leaving the CPU free for animated LCD control - and the 36 GPIO via PPS map the I2C display, PWM backlight and buzzer on any pin, which simplifies layout on curved front-panel glass where mechanical pin access is constrained. With the 8 KB SRAM the MCU can render small character bitmaps without external RAM.
推荐
Automotive Body and Interior Modules
Body-electronics domains - window lift, seat controller, ambient lighting, climate HUD - pair the PIC18F47K42-I/ML with LIN transceivers such as MCP2003B to drive a LIN 2.x slave from the MCU's UART DMA channel without CPU intervention. The 2.3 V-5.5 V range covers 12 V battery cranking transients when paired with a TVS and LDO, and the wide -40C to +85C industrial grade spans cabin environments. Designers select the K42 family for its diagnostic-friendly peripheral snapshot; for safety-relevant ECUs (airbag, ABS) step to the PIC18F Q84 family with ECC Flash. Note: this part is not AEC-Q100 qualified, so mission-critical automotive ECUs must use the auto-grade sibling.
推荐
USB HID and Bridge Adapters
The PIC18F47K42-I/ML is widely used as a USB HID / CDC bridge because its 64 MHz core, 8 KB SRAM and DMA engine make it easy to manage full-speed USB polling while servicing the UART or SPI bridge endpoint in the background. PPS routes the USB D+/D- to any of the 36 GPIO, and the 128 KB Flash supports both the USB framework and the target peripheral firmware. The 44-pin QFN (ML) 8x8 mm footprint tucks inside small dongle enclosures, and the 2.3-5.5 V range supports bus-powered designs without an external regulator.
推荐
推荐产品汇总
工程参考数据： PIC18F47K42-I/ML ——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 | PIC18F47K42-E/ML | PIC18F47K42-I/PT | PIC18F46K42-I/ML | PIC18F47K40-I/ML | PIC18F45K42-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-44 (ML) 8x8 mm | QFN-44 (ML) 8x8 mm - same | TQFP-44 (PT) 10x10 mm - same pinout, different footprint | QFN-44 (ML) 8x8 mm - same | QFN-44 (ML) 8x8 mm - same | QFN-44 (ML) 8x8 mm - same |
| Flash | 128 KB | 128 KB - same | 128 KB - same | 64 KB (-50%) | 128 KB - same | 32 KB (-75%) |
| SRAM | 8 KB | 8 KB - same | 8 KB - same | 4 KB (-50%) | 8 KB - same | 2 KB (-75%) |
| EEPROM | 1 KB | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same | 1 KB - same |
| Max CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same | 64 MHz / 16 MIPS - same |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V - same | 2.3 V to 5.5 V - same | 2.3 V to 5.5 V - same | 2.3 V to 5.5 V - same | 2.3 V to 5.5 V - same |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +125C (Extended) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
| ADC | 12-bit ADC2 w/ computation, up to 35 ch | 12-bit ADC2 - same | 12-bit ADC2 - same | 12-bit ADC2 - same | 10-bit ADC (no computation) | 12-bit ADC2 - same |
| DMA Controller | Yes (multi-channel) | Yes - same | Yes - same | Yes - same | No | Yes - same |
关键差异点
- 12-bit ADC2 with hardware computation + DMA offload （对比 PIC18F47K40-I/ML)
- Same K42 die in QFN-44 wettable-flank package （对比 PIC18F47K42-I/PT)
- 128 KB Flash + 8 KB SRAM in the K42 family （对比 PIC18F45K42-I/ML)
设计说明
Estimated decoupling budget: place one 100 nF X7R 0402 ceramic within 2 mm of each VDD pin (4 pins total on this QFN-44 package) and add a bulk 10 uF X5R 0805 ceramic on the PCB's main power plane. With 64 MHz operation and ADC2 sampling at 200 ksps, peak VDD ripple must stay below 50 mV; higher ripple couples directly into ADC2 channel accuracy. For battery-powered designs, enable the on-chip voltage regulator (FVR - Fixed Voltage Reference) for ADC2 even when the MCU is in sleep so the wake-up ADC sample remains valid.
Estimated thermal resistance for the 44-lead QFN (ML) on a 1-oz 4-layer 4 cm x 4 cm PCB with 6 thermal vias under the EP is approximately 25 C/W (this value is an estimate, not from the datasheet, and depends heavily on copper pours). At full 64 MHz / 5.5 V across all GPIO, the part typically dissipates under 250 mW internally, so most designs need only modest copper - but if you stack peripherals (DMA + ADC2 + PWM simultaneously) factor in 0.5-1 C rise per 10 mW.
Wettable-flank QFN (ML) packages improve solder-joint optical inspection because the cut-side edges of the lead terminations are plated with solderable material. Lay the exposed thermal pad so it lands on a 4 mm x 4 mm minimum copper patch with 0.3 mm-diameter thermal vias on a 0.6 mm pitch - typically 8-12 vias filled with soldermask on the back side - to keep the EP firmly soldered to the PCB. Without proper EP soldering the QFN-44 loses >50% of its thermal performance and the GND bounce on high-speed signals rises by 30-50%.
Peripheral Pin Select (PPS) must be unlocked by writing 0x55 to PPSLOCK then 0xAA to clear the lock before any PPS assignment; forgetting this write-protect sequence silently blocks peripheral functions and the GPIO pin reads high-impedance. Also, ADC2 channel assignment defaults are switched at reset - if your firmware touches analog pins after POR, configure them as 'analog' by clearing the corresponding ANSEL bit; leaving them in digital mode injects the digital input buffer into the ADC sample and breaks touch-CVD calibrations.
For EMI/CISPR 32 compliance on consumer products, route the 64 MHz HFINTOSC on a short trace directly under the MCU footprint and shield the VDD loop with adjacent ground pour. Keep USB-like digital traces (UART, SPI) on the PCB side opposite to the analog ADC2 pins, separated by a GND moat. The PPS feature is forgiving on layout - you can move UART onto any spare GPIO - which often lets you avoid a 4-layer PCB where a 2-layer layout would otherwise fail CISPR radiated emissions.
合规信息
RoHS and REACH compliant per Microchip product page datasheet header. The 'I' suffix denotes the industrial -40C to +85C temperature grade, NOT AEC-Q100 automotive qualified - body and interior automotive ECUs can use this part only when they are not safety-critical. For AEC-Q100 applications step to the auto-grade K42 device (different orderable part number) or to the PIC18F Q84 family with ECC Flash.
