PIC32MX420F032HT-40I/PT - 32-bit MCU 32KB Flash 40MHz TQFP-64
料号： PIC32MX420F032HT-40I/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.36 | $5.36 |
| 10 | $4.82 | $48.20 |
| 100 | $4.31 | $431.00 |
| 500 | $3.79 | $1,895.00 |
| 1,000 | $3.42 | $3,420.00 |
PIC32MX420F032HT-40I/PT 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals (timers, ADC, communication ports, I/O). The PIC32MX family combines 32-bit MIPS performance with PIC peripheral integration, targeting cost-sensitive embedded applications. The M4K core supports single-cycle multiply, deterministic interrupt response, and the MPLAB Harmony software framework, making this part family a 32-bit performance upgrade path for designers familiar with PIC16/PIC24 devices.
Key features of this part include USB-OTG (Full-Speed) with on-chip transceiver, a 10-bit ADC with up to 1 Msps conversion rate, two I2C, two SPI, two UART modules, five 16-bit timers, four input-capture and four output-compare PWM channels, and a Parallel Master Port (PMP) for external bus peripherals. The 64-pin TQFP footprint exposes the full peripheral set including USB D+/D-, while a 32 KB Flash / 8 KB RAM memory map comfortably supports small RTOS, USB stacks (Microchip MLA) and graphical display protocols.
Typical applications include industrial control panels, USB peripherals (HID, CDC, vendor class), low-cost graphical HMI with PMP-connected LCDs, sensor aggregation gateways, and consumer appliances. Designers select the PIC32MX420 series when a 32-bit core, native USB, and a small footprint are needed at a sub-$3 price point.
Design considerations include careful analog/digital ground partitioning to maximise ADC accuracy, decoupling VDD/VSS with 100 nF plus 10 µF bulk capacitors close to the pins, and proper impedance matching on the USB D+/D- differential pair for Full-Speed compliance.
直接替换替代料： PIC32MX420F032HT-40I/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： PIC32MX420F032HT-40I/PT （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, ADC, DMA Channels, MSL Level.
快速对比工具——选择替代料号进行并排对比：
PIC32MX420F032HT-40V/PT
✅ 直接替换✓ 有现货
$2.79 / 个
查看数据手册 →PIC32MX420F032H-40I/PT
✅ 直接替换✓ 有现货
$3.61 / 个
查看数据手册 →PIC32MX320F064HT-40I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.16 / 个
查看数据手册 →PIC32MX340F128HT-80I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX320F128L-80V/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.45 / 个
查看数据手册 →PIC32MX420F032HT-40I/PT 最大额定值与电气特性
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Core Series | PIC32MX |
| Family | PIC32MX3XX/4XX |
| Maximum Clock Speed | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| USB | USB-OTG Full-Speed with on-chip transceiver |
| ADC | 10-bit, up to 16 channels (1 Msps) |
| 封装 | 64-TQFP (PT) 10x10 mm |
| 工作温度 | -40 °C to +85 °C (industrial) |
| I/O Pins | 53 (approx., package-dependent) |
| Timers | 5 x 16-bit |
| Communication | 2x UART, 2x SPI, 2x I2C |
| PWM / Output Compare | 4 x 16-bit OC, 5 x Input Capture |
| Parallel Master Port (PMP) | Yes (for external LCD/FPGA) |
| DMA | 8-channel |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 |
| RoHS 状态 | Compliant |
PIC32MX420F032HT-40I/PT 引脚配置
| 引脚 1 | RF11 — I/O port RF11 |
| 引脚 2 | RF0 — I/O port RF0 |
| 引脚 3 | RF1 — I/O port RF1 |
| 引脚 4 | RG2 — I/O port RG2 |
| 引脚 5 | RG3 — I/O port RG3 |
| 引脚 6 | RA0 — I/O port RA0 / analog input |
| 引脚 7 | RA1 — I/O port RA1 / analog input |
| 引脚 8 | RB0 — I/O port RB0 / analog input |
| 引脚 9 | RB1 — I/O port RB1 / analog input |
| 引脚 10 | RB2 — I/O port RB2 / analog input |
| 引脚 11 | RB3 — I/O port RB3 / analog input |
| 引脚 12 | RB4 — I/O port RB4 / analog input |
| 引脚 13 | RB5 — I/O port RB5 / analog input |
| 引脚 14 | RB6 — I/O port RB6 / PGED2 (ICSP data) |
| 引脚 15 | RB7 — I/O port RB7 / PGEC2 (ICSP clock) |
| 引脚 16 | RB8 — I/O port RB8 / analog input |
| 引脚 17 | RB9 — I/O port RB9 / analog input |
| 引脚 18 | RB10 — I/O port RB10 |
| 引脚 19 | RB11 — I/O port RB11 |
| 引脚 20 | RB12 — I/O port RB12 |
| 引脚 21 | RB13 — I/O port RB13 |
| 引脚 22 | RB14 — I/O port RB14 |
| 引脚 23 | RB15 — I/O port RB15 |
| 引脚 24 | RF4 — I/O port RF4 |
| 引脚 25 | RF5 — I/O port RF5 |
| 引脚 26 | RD0 — I/O port RD0 |
| 引脚 27 | RD1 — I/O port RD1 |
| 引脚 28 | RD2 — I/O port RD2 |
| 引脚 29 | RD3 — I/O port RD3 |
| 引脚 30 | RD4 — I/O port RD4 |
| 引脚 31 | RD5 — I/O port RD5 |
| 引脚 32 | RD6 — I/O port RD6 |
| 引脚 33 | RD7 — I/O port RD7 |
| 引脚 34 | RC13 — I/O port RC13 |
| 引脚 35 | RC14 — I/O port RC14 |
| 引脚 36 | RD8 — I/O port RD8 |
| 引脚 37 | RD9 — I/O port RD9 |
| 引脚 38 | RD10 — I/O port RD10 |
| 引脚 39 | RD11 — I/O port RD11 |
| 引脚 40 | RD12 — I/O port RD12 |
| 引脚 41 | RD13 — I/O port RD13 |
| 引脚 42 | RD14 — I/O port RD14 |
| 引脚 43 | RD15 — I/O port RD15 |
| 引脚 44 | RG6 — I/O port RG6 |
| 引脚 45 | RG7 — I/O port RG7 |
| 引脚 46 | RG8 — I/O port RG8 |
| 引脚 47 | RG9 — I/O port RG9 |
| 引脚 48 | VSS — Ground reference |
| 引脚 49 | VDD — Supply voltage 2.3-3.6 V |
| 引脚 50 | RF3 — I/O port RF3 |
| 引脚 51 | RF2 — I/O port RF2 |
| 引脚 52 | RF6 — I/O port RF6 / USB D- |
| 引脚 53 | RF7 — I/O port RF7 / USB D+ |
| 引脚 54 | RF8 — I/O port RF8 |
| 引脚 55 | VDD — Supply voltage 2.3-3.6 V |
| 引脚 56 | VSS — Ground reference |
| 引脚 57 | RA2 — I/O port RA2 |
| 引脚 58 | RA3 — I/O port RA3 |
| 引脚 59 | RA4 — I/O port RA4 |
| 引脚 60 | RA5 — I/O port RA5 |
| 引脚 61 | RC1 — I/O port RC1 |
| 引脚 62 | RC2 — I/O port RC2 |
| 引脚 63 | RC3 — I/O port RC3 |
| 引脚 64 | RC4 — I/O port RC4 |
典型应用
PIC32MX420F032HT-40I/PT 适用于 7 应用s: USB HID Industrial Keypad, Low-Cost Graphical HMI with PMP LCD, Sensor Aggregation Gateway, USB Vendor Class Data Acquisition, Home Appliance Control Board, POS / Weighing Scale with PMP Display, Industrial CAN Gateway Bridge (USB-CAN).
USB HID Industrial Keypad
The PIC32MX420F032HT-40I/PT is ideal for USB HID industrial keypads because the on-chip USB-OTG Full-Speed controller eliminates external PHY chips, freeing PCB space and BOM cost. The 32 KB Flash comfortably hosts the Microchip MLA HID stack plus a custom scan matrix handler, while the 8 KB SRAM supports double-buffered endpoint transfers. The 40 MHz M4K core scans a 64-key matrix in < 1 ms with zero host-side latency. Operating from -40 °C to +85 °C industrial grade, the part is suitable for factory-floor control panels where stable supply (2.3-3.6 V) and ESD-tolerant GPIO are needed.
推荐
Low-Cost Graphical HMI with PMP LCD
For low-cost graphical HMIs with 320x240 QVGA TFT LCDs, the PIC32MX420F032HT-40I/PT fits because the on-chip Parallel Master Port (PMP) directly drives 8-bit parallel LCDs without an external bus driver. The 32 KB Flash holds Microchip's gfx library primitives and 8-bit font tables, while 8 KB SRAM provides double-buffered frame regions for tear-free refresh. The 40 MHz M4K core renders buttons at 60 fps with simple text, and the 10-bit ADC reads touch-screen coordinates through 4-wire resistive panels.
推荐
Sensor Aggregation Gateway
The PIC32MX420F032HT-40I/PT is suitable for sensor aggregation gateways where multiple UART/I2C/SPI sensors converge at a single MCU node. With two UART, two SPI, and two I2C channels plus 8-channel DMA, the part can sample 16 sensors concurrently without CPU intervention. The 32 KB Flash hosts a small command parser and the 8 KB SRAM buffers sensor frames before USB-CDC upload to a host PC. Industrial temperature grade (-40 to +85 C) supports outdoor sensor boxes, and 2.3-3.6 V supply accommodates battery-backed operation.
推荐
USB Vendor Class Data Acquisition
For USB vendor class data acquisition (DAQ) modules, this part fits because native USB-OTG Full-Speed at 12 Mbps supports real-time streaming of ADC samples to a host. The 10-bit ADC at 1 Msps generates up to 1 M samples/sec, throttled to USB throughput by DMA. 32 KB Flash holds the vendor-class descriptor plus custom protocol, while 8 KB SRAM is enough for short acquisition bursts. The on-chip USB transceiver removes external PHY cost and the 64-pin TQFP exposes the full ADC channel count for multi-channel DAQ.
推荐
Home Appliance Control Board
In home appliance control boards (washing machines, induction cookers, microwave ovens), this MCU is suitable because its 40 MHz MIPS core handles user interface, motor control via PWM and safety monitoring concurrently. The five 16-bit timers support 5-channel PWM for variable-speed drives and 4 input-capture channels for zero-crossing detection. Industrial -40 to +85 C grade covers inside-appliance temperatures, and the 64-pin TQFP package is easy to wave-solder at appliance contract manufacturers.
推荐
POS / Weighing Scale with PMP Display
For POS terminals and weighing scales, the PIC32MX420F032HT-40I/PT fits because the on-chip USB-OTG enumerates as a CDC or HID class device without external bridges, and the PMP directly drives character/graphic LCDs. 32 KB Flash stores vendor-specific USB descriptors and the 8 KB SRAM buffers invoice records. The 10-bit ADC at 16 channels reads load-cell bridges through differential pairs with PGA, while 5 timers drive buzzer PWM and backlight dimming. Industrial temperature grade supports retail and warehouse environments.
推荐
Industrial CAN Gateway Bridge (USB-CAN)
The PIC32MX420F032HT-40I/PT can serve as a USB-to-UART/SPI bridge for industrial CAN gateways, where it acts as the MCU host between an external CAN controller and a USB-attached host PC. The two UART/SPI/I2C channels connect to external CAN/MCP2515 controllers, while the USB-OTG port enumerates as CDC-ACM for transparent bridging. 40 MHz M4K core handles bit-stuffing and error handling with low-latency response. Industrial -40 to +85 C range supports factory-automation enclosures.
推荐
推荐产品汇总
工程参考数据： PIC32MX420F032HT-40I/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 | PIC32MX420F032HT-40V/PT | PIC32MX420F032H-40I/PT | PIC32MX340F128HT-80I/PT |
|---|---|---|---|---|
| Package | 64-TQFP (PT) 10x10 mm | 64-TQFP (PT) - same | 64-TQFP (PT) - same | 64-TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 32 KB | 32 KB (same) | 32 KB (same) | 128 KB |
| SRAM | 8 KB | 8 KB (same) | 8 KB (same) | 16 KB |
| Maximum Clock Speed | 40 MHz | 40 MHz (same) | 40 MHz (same) | 80 MHz |
| Operating Temperature | -40 to +85 C (industrial) | -40 to +105 C (extended) | -40 to +85 C (industrial) | -40 to +85 C (industrial) |
| USB | USB-OTG Full-Speed, on-chip transceiver | USB-OTG Full-Speed, on-chip | USB-OTG Full-Speed, on-chip | USB-OTG Full-Speed, on-chip |
| Packaging Format | Tape & Reel | Tape & Reel | Tray | Tape & Reel |
| Approx. Unit Price (1k qty) | $3.42 | $3.42 (same) | $3.50 | $4.50 |
关键差异点
- On-chip USB-OTG Full-Speed transceiver with DMA （对比 PIC32MX340F128HT-80I/PT)
- Wide temperature range option (V suffix) （对比 PIC32MX420F032HT-40V/PT)
- Cost-optimised 32 KB Flash tier （对比 PIC32MX270F256B-I/SP)
设计说明
Estimated: With a 3.3 V supply and 40 MHz clock at full I/O toggling, the PIC32MX420 core draws ~50 mA active and ~30 µA sleep. Decoupling must include a 10 µF bulk + 100 nF ceramic per VDD/VSS pair placed within 5 mm of the IC pins per Microchip DS61143H section 2.4. Add a ferrite bead on the USB VBUS line if the device is bus-powered, to suppress switching noise from upstream hosts.
Route the USB D+/D- differential pair with 90-ohm differential impedance and matched trace lengths (delta < 2 mm) for USB-OTG Full-Speed compliance. Place the crystal within 5 mm of the OSC1/OSC2 pins with a ground guard ring to reduce EMI, and keep high-frequency signals (PWM, USB) away from the analog ADC traces to preserve 10-bit ADC accuracy.
Common pitfalls when designing with PIC32MX420 include: (1) forgetting to set the JTAG/debugger disable fuse if debug pins RB6/RB7 must be used as GPIO; (2) not configuring the PLL to skip the PLL multiplier transitions during startup, which can cause intermittent lockups; (3) ignoring the USB attach/debounce requirements of section 27 in DS61143H, leading to enumeration failures; (4) leaving the PMP address latch pins floating, which can cause bus contention.
Estimated: In a typical 64-pin TQFP package with 4-layer PCB and adequate ground pour, theta-JA is ~50 °C/W. At full 50 mA active current and 3.6 V worst-case, dissipation is ~180 mW, yielding a junction temperature rise of ~9 °C above ambient. No heatsink is required, but adequate copper pour (1 square inch minimum) under the exposed die-pad should be maintained for thermal relief.
合规信息
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this is a general-purpose industrial MCU, not an automotive-grade part. Choose PIC32MX4xx family AEC-Q100 variants for automotive applications.
