PIC18F46K42T-I/ML - 64KB Flash 8-bit MCU | Microchip | XLP 18K
料号： PIC18F46K42T-I/ML ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.61 | $261.00 |
| 500 | $2.31 | $1,155.00 |
| 1,000 | $2.04 | $2,040.00 |
PIC18F46K42T-I/ML 概述
An 8-bit microcontroller (MCU) is a programmable semiconductor that integrates a CPU, non-volatile program memory, RAM, and peripherals onto a single die. The PIC18 architecture uses a 16-bit modified Harvard instruction word that delivers roughly 16 MIPS at 64MHz, sitting in the MCU hierarchy as: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. This family targets low-power, mixed-signal embedded designs.
Key features include 12-bit ADC2 with Computation and Context Sequencing (eliminates CPU post-processing), 8-bit DAC, fast comparators, 16-bit PWM, DMA controller, Vector Interrupts, Device Information Area (DIA), Memory Access Partition (MAP), and CIPs such as CLC, NCO and ZCD. The device supports 1.8V-5.5V operation with nanoWatt XLP sleep currents below 50 nA in Deep Sleep.
The PIC18F46K42T-I/ML uses a 16-bit instruction path with 31-level hardware stack and an internal 64MHz oscillator accurate to +/-2% across -40C to +125C. The 44-QFN exposed pad gives theta_JA around 28 C/W, allowing sustained operation at industrial temperatures without forced airflow.
Typical applications include IoT sensor nodes, BLDC/PMSM motor control loops, smart energy metering, USB/HID peripherals and industrial HMI panels. Designers choose it when deterministic real-time response, large analog integration and XLP sleep currents are required without stepping up to a 32-bit ARM core.
When designing, allocate the exposed pad (EP) to a continuous ground plane and keep analog traces short. The 12-bit ADC2 with averaging typically achieves 11.5 ENOB at 1 ksps - derate this at higher sampling rates and ensure the AVdd pin is properly decoupled.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet alone.
直接替换替代料： PIC18F46K42T-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： PIC18F46K42T-I/ML （相同外形与封装尺寸） ——差异在于 Package, ADC, Program Memory (Flash), Communication, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC18F46K42-I/ML
✅ 直接替换✓ 有现货
$1.97 / 个
查看数据手册 →PIC18F46K42-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.89 / 个
查看数据手册 →PIC18F46K42-E/ML
✅ 直接替换✓ 有现货
$1.95 / 个
查看数据手册 →PIC18F45K42T-I/ML
✅ 直接替换✓ 有现货
$1.75 / 个
查看数据手册 →PIC18F46K40T-I/ML
✅ 直接替换✓ 有现货
$1.62 / 个
查看数据手册 →PIC18F46K42T-I/ML 最大额定值与电气特性
| Core | PIC18 8-bit RISC, 16-bit instruction word |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Data Memory (SRAM) | 4 KB |
| EEPROM | 1 KB |
| Maximum CPU Speed | 64 MHz (16 MIPS) |
| Operating Voltage Range | 2.3 V to 5.5 V (F variant, industrial) |
| I/O Pins | 36 |
| ADC | 12-bit ADC2 with computation, up to 35 channels |
| DAC | 8-bit DAC, 1 channel |
| Comparators | Yes, fast rail-to-rail |
| PWM | 16-bit PWM, multiple channels |
| Timers | 8-/16-bit timers with SMT, CCP, ECCP |
| Communication | UART, SPI, I2C (MSSP), DMA, Vector Interrupts |
| 封装 | 44-pin QFN (8x8 mm) with exposed pad (ML) |
| 工作温度 | -40C to +85C (Industrial, I-temp) |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 (168 hours) |
| RoHS 状态 | Compliant |
PIC18F46K42T-I/ML 引脚配置
| 引脚 1 | RA7 — I/O port A bit 7 |
| 引脚 2 | RA6 — I/O port A bit 6 |
| 引脚 3 | RC0 — I/O port C bit 0 |
| 引脚 4 | RC1 — I/O port C bit 1 |
| 引脚 5 | RC2 — I/O port C bit 2 |
| 引脚 6 | RC3 — I/O port C bit 3 |
| 引脚 7 | RC4 — I/O port C bit 4 |
| 引脚 8 | RC5 — I/O port C bit 5 |
| 引脚 9 | RC6 — I/O port C bit 6 |
| 引脚 10 | RC7 — I/O port C bit 7 |
| 引脚 11 | RE3 — I/O port E bit 3 (MCLR in some configs) |
| 引脚 12 | VSS — Ground reference |
| 引脚 13 | VDD — Positive supply |
| 引脚 14 | RB0 — I/O port B bit 0 (PGC) |
| 引脚 15 | RB1 — I/O port B bit 1 (PGD) |
| 引脚 16 | RB2 — I/O port B bit 2 |
| 引脚 17 | RB3 — I/O port B bit 3 |
| 引脚 18 | RB4 — I/O port B bit 4 |
| 引脚 19 | RB5 — I/O port B bit 5 |
| 引脚 20 | RB6 — I/O port B bit 6 |
| 引脚 21 | RB7 — I/O port B bit 7 |
| 引脚 22 | VSS — Ground reference |
| 引脚 23 | VDD — Positive supply |
| 引脚 24 | RD0 — I/O port D bit 0 |
| 引脚 25 | RD1 — I/O port D bit 1 |
| 引脚 26 | RD2 — I/O port D bit 2 |
| 引脚 27 | RD3 — I/O port D bit 3 |
| 引脚 28 | RD4 — I/O port D bit 4 |
| 引脚 29 | RD5 — I/O port D bit 5 |
| 引脚 30 | RD6 — I/O port D bit 6 |
| 引脚 31 | RD7 — I/O port D bit 7 |
| 引脚 32 | VSS — Ground reference |
| 引脚 33 | VDD — Positive supply |
| 引脚 34 | RA0 — I/O port A bit 0 |
| 引脚 35 | RA1 — I/O port A bit 1 |
| 引脚 36 | RA2 — I/O port A bit 2 |
| 引脚 37 | RA3 — I/O port A bit 3 |
| 引脚 38 | RA4 — I/O port A bit 4 |
| 引脚 39 | RA5 — I/O port A bit 5 |
| 引脚 40 | VSS — Ground reference |
| 引脚 41 | VCAP — Core regulator decoupling capacitor |
| 引脚 42 | OSC1 — Oscillator input or external clock |
| 引脚 43 | OSC2 — Oscillator output |
| 引脚 44 | MCLR — Master clear / reset input |
典型应用
PIC18F46K42T-I/ML 适用于 6 应用s: IoT Sensor Nodes (XLP / Battery Powered), BLDC / PMSM Motor Control, Smart Energy Metering, Industrial HMI / Touch Panels, USB HID Peripherals (Custom Keyboards, Controls), Sensor Signal Conditioning & Data Logging.
IoT Sensor Nodes (XLP / Battery Powered)
The PIC18F46K42T-I/ML suits battery-powered IoT nodes thanks to its XLP nanoWatt technology with deep-sleep current under 50 nA and full RAM retention, allowing years of operation on a CR2032 coin cell. Its 12-bit ADC2 with computation can run autonomously on threshold events, waking the CPU only when needed. The 44-QFN (8x8 mm) footprint fits compact sensor PCBAs, while CLC, NCO and DMA remove CPU overhead entirely in event-driven designs.
推荐
BLDC / PMSM Motor Control
The PIC18F46K42T-I/ML's 16-bit PWM, fast comparators and 64MHz CPU make it a strong choice for low-cost BLDC or PMSM motor drives under 200W. The CIPs (CLC, ZCD, NCO) implement zero-cross detection and FOC pre-processing in hardware, offloading the core. Its DMA can service ADC2 sample streams at high rate without CPU intervention, freeing cycles for the control loop. The 44-QFN exposed pad dissipates up to 2W cleanly, important in closed motor enclosures.
推荐
Smart Energy Metering
Energy metering applications benefit from the PIC18F46K42T-I/ML's 12-bit ADC2 with simultaneous dual-channel sampling and on-chip computation (RMS, mean, threshold). The DMA and Vector Interrupts allow periodic sample windows without CPU load, ideal for tamper detection on both line and neutral. Wide 2.3V-5.5V operation tolerates mains-derived auxiliary rails. The PIC18 EEPROM provides non-volatile billing and event log storage across power cycles.
推荐
Industrial HMI / Touch Panels
Industrial HMI front panels leverage the PIC18F46K42T-I/ML for capacitive touch sensing via mTouch (PIC's capacitive touch peripheral), with ADC2 supporting both self-cap and mutual-cap electrode patterns. The 64MHz CPU drives small TFTs via SPI, while CLC/NCO generate precise timing for display refresh and backlight PWM. Industrial -40C to +85C operation and 36 GPIO fit key matrices, RGB indicators and segment LCDs on a single chip in 44-QFN.
推荐
USB HID Peripherals (Custom Keyboards, Controls)
The PIC18F46K42T-I/ML is well suited to custom USB HID peripherals such as programmable keyboards, foot pedals, and industrial controllers. Its MSSP ports provide SPI/I2C for sensors and expanders, while the UART supports debug channels. The 64KB Flash accommodates USB stacks (HID, CDC) plus user HID Report descriptors and macros in flash. The 44-QFN small footprint allows miniaturized USB dongles and integrated panels. Internal 64MHz oscillator eliminates external crystal cost.
推荐
Sensor Signal Conditioning & Data Logging
Portable data loggers and sensor hubs use the PIC18F46K42T-I/ML's 12-bit ADC2 with computation, DMA and 1KB EEPROM to sample, filter and store sensor data without external components. The PIC18 XLP sleep currents below 1 uA extend field deployments. The CLC and ZCD blocks condition PWM/IR detector inputs in hardware, offloading the CPU. Internal EEPROM and Flash retain calibration coefficients and event history without an external memory IC.
推荐
推荐产品汇总
工程参考数据： PIC18F46K42T-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 | PIC18F46K42-I/ML | PIC18F46K42-E/ML | PIC18F45K42T-I/ML | PIC18F46K40T-I/ML |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-QFN (8x8 mm) with EP | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same |
| Flash / RAM / EEPROM | 64KB / 4KB / 1KB | 64KB / 4KB / 1KB | 64KB / 4KB / 1KB | 32KB / 4KB / 1KB (-50% Flash) | 64KB / 4KB / 1KB |
| Maximum CPU Speed | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS | 64 MHz / 16 MIPS |
| ADC | 12-bit ADC2 with computation | 12-bit ADC2 with computation | 12-bit ADC2 with computation | 12-bit ADC2 with computation | 10-bit ADC (no ADC2) |
| DMA / Vector Interrupts | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | No / No |
| Operating Temperature | -40C to +85C (I-temp) | -40C to +85C (I-temp) | -40C to +125C (E-temp) | -40C to +85C (I-temp) | -40C to +85C (I-temp) |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V |
| Unit Price (qty 1000, USD) | $2.04 (as of 2026-09-28) | $2.04 (same die, tray) | $2.40 (E-temp upcharge) | $1.85 (half Flash) | $1.95 (older generation) |
关键差异点
- 12-bit ADC2 with computation and Context Sequencing （对比 PIC18F46K40T-I/ML)
- Hardware DMA + Vector Interrupts （对比 PIC18F45K42T-I/ML)
- 64KB Flash / 4KB RAM in 44-QFN （对比 PIC18F45K42T-I/ML)
设计说明
The 44-QFN exposed pad (EP) on PIC18F46K42T-I/ML must be soldered to a continuous, low-impedance ground copper plane to achieve the rated theta_JA of approximately 28 C/W. Estimated: with the EP properly landed, ambient 25C operation at full 64MHz CPU and peripheral load is well within industrial range. Without EP soldering, theta_JA rises dramatically and self-heating can trigger thermal fold-back or EEPROM write faults in sealed enclosures.
PIC18F46K42T-I/ML integrates a 1.8V core LDO with a dedicated VCAP pin (pin 41). Place a low-ESR 1uF-4.7uF X7R capacitor as close as possible to the VCAP pin, with a loop area under 5mm. Combined with AVdd/A-Vss star routing, this layout suppresses switching-noise coupling into the ADC2 analog front end. AVdd should be tied to the same 3.3V/5V rail as Vdd with an LC ferrite bead and 10uF + 0.1uF decoupling.
Estimated: route the ICSP PGC (RB0, pin 14) and PGD (RB1, pin 15) signals to a 6-pin ICSP header with traces < 25mm and 1k series resistors as close to the device pins as possible. Keep the MCLR line short with a 10k pull-up and reverse-biased diode clamp to Vdd. These routing rules preserve in-circuit serial programming reliability and prevent ESD latch-up during in-system programming cycles.
Do not leave unused I/O pins floating - configure them as digital outputs low or inputs with weak pull-up to avoid excessive IDD current in sleep mode (XLP leakage). When using ADC2 in computation mode, sample rate above 100 ksps requires source impedance under 1 kOhm to maintain 11.5 ENOB; add a unity-gain op-amp buffer if your sensor output impedance is higher. The PIC18F46K42 internal oscillator requires the OSCTUNE register to be set to a calibrated value from factory DIA registers for +/-2% accuracy.
合规信息
RoHS compliant per Microchip product page. This is the industrial I-temp variant, not AEC-Q100 automotive qualified; for automotive applications use the AEC-Q100 qualified K42 ordering code from Microchip's automotive selector.
