PIC18F46K42-I/PT - 64KB Flash XLP 8-bit MCU | Microchip
料号： PIC18F46K42-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.21 | $3.21 |
| 10 | $2.88 | $28.80 |
| 100 | $2.49 | $249.00 |
| 500 | $2.18 | $1,090.00 |
| 1,000 | $1.89 | $1,890.00 |
PIC18F46K42-I/PT 概述
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path that integrates a CPU, non-volatile program memory, working RAM, EEPROM, timers, communication peripherals, and I/O on one die. PIC18F-series MCUs sit in the product hierarchy: PIC18F -> 8-bit PIC -> PIC microcontroller -> microcontroller -> embedded system-on-chip. They are widely used where deterministic code execution, low power, and rich analog integration are required.
Key features of the PIC18F46K42-I/PT include a 12-bit Differential ADC2 with up to 35 channels and hardware averaging, a 5-bit DAC, multiple 16-bit PWMs with complementary outputs, configurable logic cells (CLC), DMA controllers that move data without CPU intervention, and vectored interrupts with priority levels. The 44-pin TQFP (PT) package offers up to 36 general-purpose I/O pins with 5V tolerance on most digital I/O.
The PIC18F46K42 architecture combines a modified Harvard bus, a hardware multiplier, an 8-level hardware stack, vectored interrupts with priority levels, and XLP nanoWatt sleep modes for battery-powered designs. ADC2 includes built-in accumulators and averaging, while CLC blocks allow glue logic implementation in hardware without discrete gates.
Typical applications include IoT sensor nodes, motor control (BLDC, stepper, brushed DC), industrial automation, low-power wireless sensor platforms, USB-CDC peripherals, and consumer appliances. The 12-bit ADC2, op-amps, and DAC simplify analog front-end designs without external components.
When designing with this device, verify that the supply voltage and oscillator configuration match the application's power profile. The MSSP, CCP/PWM, CWG, and DMA blocks should be planned early to leverage core-independent operation and minimize active current. For low-power battery designs, use the deep-sleep modes combined with RTCC and peripheral wake sources.
This page synthesizes distributor pricing, drop-in PIC18FxxK42 family alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： PIC18F46K42-I/PT ——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： PIC18F46K42-I/PT （相同外形与封装尺寸） ——差异在于 ADC, Package, Core, Core Architecture, DAC.
快速对比工具——选择替代料号进行并排对比：
PIC18F47K42-I/PT
✅ 直接替换✓ 有现货
$2.04 / 个
查看数据手册 →PIC18F46K22-I/PT
✅ 直接替换✓ 有现货
$2.32 / 个
查看数据手册 →PIC18F46K40-I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC18F4685T-I/PT
✅ 直接替换✓ 有现货
$6.89 / 个
查看数据手册 →DSPIC33EV64GM106-I/PT
✅ 直接替换✓ 有现货
$3.3 / 个
查看数据手册 →PIC18F46K42-I/PT 最大额定值与电气特性
| Core | PIC18 8-bit RISC |
| Series | PIC18FxxK42 (XLP) |
| Program Memory (Flash) | 64 KB (32K x 16) |
| SRAM | 4 KB |
| EEPROM | 1 KB |
| Maximum CPU Speed | 64 MHz |
| Operating Voltage | 2.3 V to 5.5 V |
| ADC | 12-bit ADC2 with computation, up to 35 channels |
| DAC | 5-bit DAC |
| PWM | Multiple 16-bit PWM channels with complementary outputs |
| Comparators | Yes |
| Communication | UART, SPI, I2C (MSSP) |
| DMA | Yes |
| CLC | Configurable Logic Cells |
| 封装 | 44-pin TQFP (10x10 mm) |
| I/O Pins | Up to 36 |
| 工作温度 | -40 C to +85 C (Industrial) |
| 安装类型 | Surface Mount |
| RoHS | Compliant |
PIC18F46K42-I/PT 引脚配置
| 引脚 1 | MCLR/ICSPCLK — Master Clear (reset) input / In-Circuit Serial Programming clock |
| 引脚 2 | RA0 — Port A bit 0 (analog/digital I/O) |
| 引脚 3 | RA1 — Port A bit 1 (analog/digital I/O) |
| 引脚 4 | RA2 — Port A bit 2 (analog/digital I/O) |
| 引脚 5 | RA3 — Port A bit 3 (analog/digital I/O) |
| 引脚 6 | RA4 — Port A bit 4 (analog/digital I/O) |
| 引脚 7 | RA5 — Port A bit 5 (analog/digital I/O) |
| 引脚 8 | RA6 — Port A bit 6 (analog/digital I/O) |
| 引脚 9 | RA7 — Port A bit 7 (analog/digital I/O) |
| 引脚 10 | VSS — Ground reference |
| 引脚 11 | VDD — Positive supply voltage |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | OSCI/CLKIN — External oscillator input / clock input |
| 引脚 14 | OSCO/CLKOUT — External oscillator output / clock output |
| 引脚 15 | RC0 — Port C bit 0 (analog/digital I/O) |
| 引脚 16 | RC1 — Port C bit 1 (analog/digital I/O) |
| 引脚 17 | RC2 — Port C bit 2 (analog/digital I/O) |
| 引脚 18 | RC3 — Port C bit 3 (analog/digital I/O) |
| 引脚 19 | RD0 — Port D bit 0 (digital I/O) |
| 引脚 20 | RD1 — Port D bit 1 (digital I/O) |
| 引脚 21 | RD2 — Port D bit 2 (digital I/O) |
| 引脚 22 | RD3 — Port D bit 3 (digital I/O) |
| 引脚 23 | RC4 — Port C bit 4 (analog/digital I/O) |
| 引脚 24 | RC5 — Port C bit 5 (analog/digital I/O) |
| 引脚 25 | RC6 — Port C bit 6 (analog/digital I/O) |
| 引脚 26 | RC7 — Port C bit 7 (analog/digital I/O) |
| 引脚 27 | RD4 — Port D bit 4 (digital I/O) |
| 引脚 28 | RD5 — Port D bit 5 (digital I/O) |
| 引脚 29 | RD6 — Port D bit 6 (digital I/O) |
| 引脚 30 | RD7 — Port D bit 7 (digital I/O) |
| 引脚 31 | VSS — Ground reference |
| 引脚 32 | VDD — Positive supply voltage |
| 引脚 33 | RB0 — Port B bit 0 (analog/digital I/O, interrupt-on-change) |
| 引脚 34 | RB1 — Port B bit 1 (analog/digital I/O, interrupt-on-change) |
| 引脚 35 | RB2 — Port B bit 2 (analog/digital I/O, interrupt-on-change) |
| 引脚 36 | RB3 — Port B bit 3 (analog/digital I/O, interrupt-on-change) |
| 引脚 37 | RB4 — Port B bit 4 (analog/digital I/O, interrupt-on-change) |
| 引脚 38 | RB5 — Port B bit 5 (analog/digital I/O, interrupt-on-change) |
| 引脚 39 | RB6 — Port B bit 6 (ICSPSIM programming data, I/O) |
| 引脚 40 | RB7 — Port B bit 7 (ICSPSIM programming data, I/O) |
| 引脚 41 | RE0 — Port E bit 0 (analog/digital I/O) |
| 引脚 42 | RE1 — Port E bit 1 (analog/digital I/O) |
| 引脚 43 | RE2 — Port E bit 2 (analog/digital I/O) |
| 引脚 44 | RE3 — Port E bit 3 (analog/digital I/O) |
典型应用
PIC18F46K42-I/PT 适用于 6 应用s: IoT Sensor Node Controller, BLDC and Stepper Motor Control, Industrial Automation and HMI, Battery-Powered Wireless Sensor Platform, USB-CDC Communication Peripherals, Consumer Appliance Control.
IoT Sensor Node Controller
The PIC18F46K42-I/PT is well-suited for IoT sensor nodes because its XLP nanoWatt sleep currents extend battery life to years on a single coin cell, while the 64 KB Flash and 4 KB SRAM host a real-time OS or LoRaWAN/Wi-Fi stack. The 12-bit ADC2 with up to 35 channels digitizes sensor arrays without external analog components. DMA offloads data movement from the CPU, allowing the core to remain in sleep while peripherals sample and buffer. At 16 MIPS (64 MHz), the device can process FFTs and on-sensor edge analytics between sleep cycles.
推荐
BLDC and Stepper Motor Control
The PIC18F46K42-I/PT drives BLDC, stepper, and brushed-DC motors using its multiple 16-bit PWMs with complementary outputs and dead-band control, plus the CWG (Complementary Waveform Generator) for high-side/low-side FET timing. The 12-bit ADC2 with computation samples back-EMF and phase current at the PWM rate, while DMA streams samples without CPU load. The 64 MHz CPU executes Field-Oriented Control (FOC) loops within 16 microseconds, leaving headroom for housekeeping and commutation logic.
推荐
Industrial Automation and HMI
The PIC18F46K42-I/PT serves industrial PLCs and HMI panels thanks to its 5V-tolerant I/O, robust ADC2 for sensor conditioning, and CIPs that handle deterministic timing without CPU intervention. Vector interrupts with hardware priority guarantee low-latency responses to safety-critical events such as limit-switch or emergency-stop inputs. UART, SPI, and I2C peripherals connect to Modbus, RS-485 transceivers, and local displays. The 44-pin TQFP package exposes 36 GPIO for keypad, LED, and relay matrix interfaces.
推荐
Battery-Powered Wireless Sensor Platform
The PIC18F46K42-I/PT anchors battery-powered wireless sensor platforms where its XLP technology reduces sleep current below 100 nA while peripherals (RTCC, CLC, comparator) continue to monitor wake sources. The 12-bit ADC2 with hardware averaging provides high-accuracy battery-voltage and sensor readings without active CPU intervention. DMA moves ADC samples into RAM buffers autonomously, allowing the core to wake only after a complete sample window. Operating voltage down to 2.3V supports single-cell Li-ion or two-AA-cell supplies.
推荐
USB-CDC Communication Peripherals
The PIC18F46K42-I/PT implements USB-CDC virtual COM-port peripherals when paired with a USB-to-UART bridge such as the MCP2200 or FT232. The on-chip UART handles bridging at full speed, while the 64 KB Flash accommodates CDC stack plus application code. Vector interrupts and DMA enable responsive data transfer without missing packets. The 12-bit ADC2 digitizes analog signals concurrently with USB traffic. Industrial-grade temperature rating and 5V tolerance simplify integration with legacy USB hosts.
推荐
Consumer Appliance Control
The PIC18F46K42-I/PT runs consumer appliance control boards such as coffee machines, washing machines, and HVAC thermostats thanks to its robust ADC2, multi-channel PWM for motor/valve control, and integrated comparators for safety monitoring. The 5V tolerance and 2.3-5.5 V operating range tolerate noisy rectified mains-derived rails. CLC blocks implement state-machine logic in hardware, reducing firmware complexity and improving EMC immunity. The 64 KB Flash stores both the application and a fail-safe bootloader for field updates.
推荐
推荐产品汇总
工程参考数据： PIC18F46K42-I/PT ——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-I/PT | PIC18F46K22-I/PT | PIC18F46K40-I/PT | PIC18F4685T-I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (PT, 10x10 mm) | 44-TQFP (PT, 10x10 mm) - same | 44-TQFP (PT, 10x10 mm) - same | 44-TQFP (PT, 10x10 mm) - same | 44-TQFP (PT, 10x10 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 64 KB | 128 KB | 64 KB | 64 KB | 80 KB |
| RAM | 4 KB | 8 KB | 3.8 KB | 3.7 KB | 3.3 KB |
| EEPROM | 1 KB | 1 KB | 1 KB | 1 KB | 1 KB |
| Maximum CPU Speed | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 64 MHz (16 MIPS) | 40 MHz (10 MIPS) |
| ADC | 12-bit ADC2 (35 ch) | 12-bit ADC2 (35 ch) | 10-bit ADC | 10-bit ADC | 10-bit ADC |
| DMA / CLC / CWG | Yes (full CIP set) | Yes (full CIP set) | No | No | No |
关键差异点
- Core-independent peripherals with DMA and vector interrupts （对比 PIC18F46K40-I/PT)
- 12-bit ADC2 with computation and up to 35 channels （对比 PIC18F46K22-I/PT)
- XLP nanoWatt sleep current technology （对比 PIC18F4685T-I/PT)
- 64 KB Flash vs older 64 KB K22 architecture （对比 PIC18F46K22-I/PT)
设计说明
Estimated: at VDD=5 V with the CPU running at 64 MHz, active current is approximately 14 mA typical; sleep current with peripherals disabled is below 1 uA. For battery-powered designs, use the device's deep-sleep modes combined with RTCC and peripheral wake sources to extend battery life into the year range. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of each VDD pin, plus a 10 uF bulk capacitor at the regulator output.
Place decoupling capacitors (100 nF) as close as possible to every VDD pin (11 and 32) and route VSS directly to a low-impedance ground plane. The 44-TQFP package has a center thermal pad that should be soldered to a copper pour and thermally tied to the ground plane for heat spreading. Avoid routing high-frequency signals (PWM, SPI clock) directly under the MCU to minimize crosstalk. Keep analog input traces short and guarded with ground to preserve ADC2 accuracy.
Do not assume the default oscillator configuration; verify HFINTOSC, PLL, and clock-divider settings match the application's power profile. The MCLR pin (pin 1) must have a 10 kohm pull-up and a 100 nF capacitor for reliable reset; leaving it floating causes spurious resets. When using the ADC2, allow adequate acquisition time (set ACQT bits) for high-impedance sources to avoid ADC noise. The PPS (Peripheral Pin Select) feature requires explicit configuration before using remapped peripherals.
For motor-control designs using the CWG and PWMs, route the high-side/low-side gate-drive signals with matched trace lengths (within 5 mm) to prevent timing skew. Place the current-sense amplifier close to the low-side FET source resistor and use a Kelvin connection. Isolate analog ground (AGND) from digital ground (DGND) at a single star point near the MCU's VSS pins to avoid ground-loop noise coupling into the ADC.
合规信息
RoHS and REACH compliant per Microchip product page. Industrial temperature grade (-40 C to +85 C). Not AEC-Q100 qualified; for automotive applications, see the PIC18F46K42-I/PTVAO automotive-grade variant.