PIC18F45Q43-I/PT - 8-Bit 64MHz 32KB Flash MCU | Microchip
料号： PIC18F45Q43-I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.25 | $22.50 |
| 100 | $2 | $200.00 |
| 500 | $1.78 | $890.00 |
| 1,000 | $1.58 | $1,580.00 |
PIC18F45Q43-I/PT 概述
An 8-bit microcontroller (MCU) is a programmable processor that fetches and executes instructions one byte at a time from internal Flash memory. The PIC18 architecture falls within the broader hierarchy of microcontroller -> embedded processor -> semiconductor IC, where the XLP (eXtreme Low Power) platform sits at the low-power end of Microchip's 8-bit MCU lineup. Unlike 32-bit Cortex-M parts, an 8-bit PIC excels at deterministic bit-manipulation, low-cost BOM integration, and rapid interrupt response with a simplified instruction set.
Key features include 32 KB self-programmable Flash, 2 KB SRAM, 256 bytes EEPROM, 3x 16-bit PWM outputs, 6-channel DMA, multiple CLCs, a 12-bit ADC with Computation (ADCC), 8-bit DAC, and Functional Safety (FuSa) diagnostics. The 64 MHz internal oscillator drives 16 MIPS throughput, while the XLP technology enables sleep currents in the nanoamp range for battery-powered systems.
Architecturally, the device leverages a Harvard-style RISC core with hardware multipliers and a 31-level hardware stack, providing deterministic timing. The 12-bit ADCC automates Capacitive Voltage Divider (CVD) for touch sensing, while CLCs allow logic-gate customization without external glue logic. Six DMA channels offload repetitive peripheral-to-memory transfers, freeing the CPU for higher-level tasks.
Typical applications include industrial capacitive touch HMI, real-time motor control (BLDC, stepper), LED lighting and color-mixing controllers, low-power sensor nodes, and functional-safety subsystems where IEC 61508 compliance is required. The Q43 series targets designers replacing discrete analog timing/sequencing blocks with configurable on-chip peripherals.
When designing, ensure the 5V-tolerant digital inputs are not driven beyond VDD+0.3V, and observe the supply-voltage ramp requirements of the ADCC. For capacitive touch, route the CVD pins away from high-noise digital traces and follow Microchip application note TB3139 for touch-PCB layout.
This page synthesizes distributor pricing, drop-in alternatives in the same 44-TQFP footprint, and design guidance not found in the manufacturer datasheet summary alone.
直接替换替代料： PIC18F45Q43-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： PIC18F45Q43-I/PT （相同外形与封装尺寸） ——差异在于 ADC, Package, Program Memory (Flash), DAC, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC18F45Q43-I/P
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.62 / 个
查看数据手册 →PIC18F45Q43-E/PT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC18F45K42-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.52 / 个
查看数据手册 →PIC18F45K80-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.4 / 个
查看数据手册 →PIC18F46Q43-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.22 / 个
查看数据手册 →PIC18F45Q43-I/PT 最大额定值与电气特性
| Core Architecture | PIC18, 8-bit RISC |
| CPU Speed | 64 MHz (16 MIPS) |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 2 KB |
| EEPROM | 256 bytes |
| 封装 | 44-pin TQFP (10x10 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| ADC | 12-bit ADCC with computation |
| DAC | 8-bit DAC |
| PWM | 3x 16-bit PWM |
| DMA Channels | 6 |
| CLC (Configurable Logic Cells) | Yes |
| Functional Safety | FuSa diagnostics |
| XLP Technology | Yes (eXtreme Low Power) |
| RoHS 状态 | Compliant |
PIC18F45Q43-I/PT 引脚配置
| 引脚 1 | RC7 — I/O port C bit 7 / RX |
| 引脚 2 | RD0 — I/O port D bit 0 |
| 引脚 3 | RD1 — I/O port D bit 1 |
| 引脚 4 | RD2 — I/O port D bit 2 |
| 引脚 5 | RD3 — I/O port D bit 3 |
| 引脚 6 | RC4 — I/O port C bit 4 |
| 引脚 7 | RC5 — I/O port C bit 5 |
| 引脚 8 | RC6 — I/O port C bit 6 / TX |
| 引脚 9 | RC3 — I/O port C bit 3 |
| 引脚 10 | RC2 — I/O port C bit 2 |
| 引脚 11 | RC1 — I/O port C bit 1 |
| 引脚 12 | RC0 — I/O port C bit 0 |
| 引脚 13 | VSS — Ground reference |
| 引脚 14 | RA7 — I/O port A bit 7 |
| 引脚 15 | RA6 — I/O port A bit 6 |
| 引脚 16 | RA5 — I/O port A bit 5 |
| 引脚 17 | RA4 — I/O port A bit 4 |
| 引脚 18 | RA3 — I/O port A bit 3 |
| 引脚 19 | RA2 — I/O port A bit 2 |
| 引脚 20 | RA1 — I/O port A bit 1 / ICDDAT |
| 引脚 21 | RA0 — I/O port A bit 0 / ICDCLK |
| 引脚 22 | VSS — Ground reference |
| 引脚 23 | VDD — Positive supply |
| 引脚 24 | RB7 — I/O port B bit 7 |
| 引脚 25 | RB6 — I/O port B bit 6 / ICSPCLK |
| 引脚 26 | RB5 — I/O port B bit 5 |
| 引脚 27 | RB4 — I/O port B bit 4 |
| 引脚 28 | RB3 — I/O port B bit 3 |
| 引脚 29 | RB2 — I/O port B bit 2 |
| 引脚 30 | RB1 — I/O port B bit 1 |
| 引脚 31 | RB0 — I/O port B bit 0 / INT |
| 引脚 32 | VDD — Positive supply |
| 引脚 33 | VSS — Ground reference |
| 引脚 34 | RD4 — I/O port D bit 4 |
| 引脚 35 | RD5 — I/O port D bit 5 |
| 引脚 36 | RD6 — I/O port D bit 6 |
| 引脚 37 | RD7 — I/O port D bit 7 |
| 引脚 38 | RE0 — I/O port E bit 0 |
| 引脚 39 | RE1 — I/O port E bit 1 |
| 引脚 40 | RE2 — I/O port E bit 2 |
| 引脚 41 | RE3 — I/O port E bit 3 |
| 引脚 42 | AVDD — Analog positive supply |
| 引脚 43 | AVSS — Analog ground |
| 引脚 44 | MCLR — Reset (active low) |
典型应用
PIC18F45Q43-I/PT 适用于 7 应用s: Industrial Capacitive Touch HMI, BLDC and Stepper Motor Control, LED Lighting and Color Mixing, Low-Power IoT Sensor Nodes, Functional-Safety Sensor Subsystems, Consumer Appliance Control Boards, Automotive Body and Lighting Modules.
Industrial Capacitive Touch HMI
The PIC18F45Q43-I/PT excels in capacitive-touch HMI designs thanks to its on-chip 12-bit ADCC with CVD (Capacitive Voltage Divider) sequencing, which automates touch measurement without CPU intervention. With 32 KB Flash and 2 KB SRAM the part supports the Microchip mTouch firmware library plus custom UI state machines for panels up to a dozen keys. Functional Safety (FuSa) diagnostics satisfy IEC 61508 SIL 2 requirements for industrial control panels where the touch interface is the primary operator input.
推荐
BLDC and Stepper Motor Control
The PIC18F45Q43-I/PT drives brushless DC and stepper motors using three 16-bit PWMs with complementary outputs and programmable dead-band, plus a 6-channel DMA engine that streams commutation patterns without CPU load. The 64 MHz core and CIPs (Core Independent Peripherals) deliver deterministic switching suitable for FOC or trapezoidal commutation. CLCs glue the hall-sensor inputs directly to PWM outputs, achieving microsecond response without software in the loop.
推荐
LED Lighting and Color Mixing
For architectural or horticultural LED drivers, the PIC18F45Q43-I/PT combines 16-bit PWM resolution with the 12-bit ADCC and 8-bit DAC to implement closed-loop color-mixing and current regulation. DMA streams PWM duty updates from memory, freeing the CPU for DMX-512 or DALI protocol handling. XLP low-power sleep modes keep standby consumption under microamps for battery-backup emergency fixtures.
推荐
Low-Power IoT Sensor Nodes
The PIC18F45Q43-I/PT is a strong fit for battery-powered sensor nodes where XLP technology achieves nanoamp sleep currents with RTC wake-up. The CLCs allow event-driven sensor fusion - a threshold on the ADCC can directly wake the MCU and route data via DMA before the CPU resumes. With 32 KB program space, the device supports Zigbee or LoRa host-side protocol stacks for edge sensors in agriculture or asset-tracking.
推荐
Functional-Safety Sensor Subsystems
In IEC 61508 SIL 2 systems such as industrial pressure or flow transmitters, the PIC18F45Q43-I/PT provides on-chip FuSa diagnostics including redundant oscillator monitoring, ADC self-test, and watchdog timer with windowed mode. Microchip publishes a Safety Manual and FMEDA so designers can integrate the MCU without redundant hardware in some architectures. The 44-pin TQFP eases layout in compact DIN-rail enclosures.
推荐
Consumer Appliance Control Boards
Washing machines, induction cooktops, and HVAC controllers use the PIC18F45Q43-I/PT for user-interface scanning, motor timing, and sensor aggregation. The 16-bit PWMs drive TRIAC phase-angle control or IGBT gates, while CLCs implement overcurrent protection hardware interlocks. The 5V-tolerant I/O simplifies integration with legacy 5V sensor signals common in white-goods designs.
推荐
Automotive Body and Lighting Modules
For non-safety automotive subsystems (ambient lighting, body controllers, rear lamps), the PIC18F45Q43-I/PT -40C to +85C industrial grade or its -40C to +125C extended-temperature variant provides LIN-compatible UART, 16-bit PWM dimming, and 12-bit ADC for current sensing. Although not AEC-Q100 qualified itself, the Q43 family is a fit for accessory ECUs in cabin applications where AEC-Q100 is not mandated.
推荐
推荐产品汇总
工程参考数据： PIC18F45Q43-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 | PIC18F45Q43-I/P | PIC18F45Q43-E/PT | PIC18F45K42-I/PT | PIC18F45K80-I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 40-PDIP | 44-TQFP (same) | 44-TQFP | 44-TQFP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 64 MHz / 16 MIPS | 64 MHz | 64 MHz | 64 MHz | 64 MHz |
| Program Flash | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Functional Safety (FuSa) | Yes | Yes | Yes | No | No |
| DMA Channels | 6 | 6 | 6 | 0 | 0 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C |
关键差异点
- Functional Safety (FuSa) on-chip diagnostics （对比 PIC18F45K42-I/PT)
- Six DMA channels plus CLCs （对比 PIC18F45K80-I/PT)
- 12-bit ADCC with CVD for capacitive touch （对比 PIC18F46Q43-I/PT)
- 16-bit PWM resolution vs 10-bit on legacy PIC18 （对比 PIC18F45K20-I/PT)
设计说明
The PIC18F45Q43-I/PT supports 1.8 V to 5.5 V VDD operation. Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 23 and 32) and a bulk 10 uF tantalum or ceramic on the supply rail. For low-power designs, use the XLP Sleep mode with WDT disabled; the datasheet documents typical sleep currents under 1 uA and down to nA levels with full retention. Estimated: at 64 MHz active, the core consumes roughly 8-12 mA depending on peripheral activity, so verify thermal dissipation at high duty cycles.
For capacitive touch (CVD) designs, route the CVD-capable pins (typically on PORTA and PORTB) away from high-frequency digital traces and noisy switching nodes. Place a ground guard ring around each touch pad and connect AVDD/AVSS through a ferrite bead from VDD/VSS to keep ADC reference clean. Reference Microchip application note TB3139 for full PCB touch-layout guidance and the ADCC datasheet section for sample sequencing.
When driving PWM outputs through long cables or to gate drivers, place a 10-47 ohm series resistor within 5 mm of the MCU pin to dampen transmission-line ringing. The 16-bit PWM outputs can switch sub-20 ns edges, so uncontrolled traces may exceed CISPR radiated limits without proper PCB stackup (continuous reference plane under traces is recommended).
Do not leave the MCLR pin floating - either tie it to VDD through a 10 kohm pull-up or drive it with a manual reset supervisor. Unused I/O pins should be configured as outputs driving low or as inputs with weak pull-ups enabled to avoid shoot-through current. For ICSP programming, dedicate RB6 (ICSPCLK) and RB7 (ICSPDAT) and avoid placing load capacitance above 30 pF on these pins.
合规信息
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - the industrial-grade /I variant is for non-automotive applications. For AEC-Q100 use, refer to Microchip's automotive-grade PIC18 catalogue. Functional Safety (FuSa) diagnostics support IEC 61508 SIL 2 design compliance when paired with Microchip Safety Manual.