PIC32MX120F032DT-50I/TL - 32-bit 50MHz MCU, 32KB Flash | Microchip
料号： PIC32MX120F032DT-50I/TL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.26 | $3.26 |
| 10 | $3.1 | $31.00 |
| 100 | $2.78 | $278.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.18 | $2,180.00 |
| 3,300 | $1.95 | $6,435.00 |
PIC32MX120F032DT-50I/TL 概述
A microcontroller is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of peripherals. In the product taxonomy, a PIC32MX device is a 32-bit microcontroller -> microcontroller unit (MCU) -> embedded processor -> semiconductor. Compared with 8-bit PIC16/PIC18 parts, the PIC32MX1xx uses the MIPS32 M4K core to deliver roughly ten times the compute throughput at the same clock rate, while retaining the familiar MPLAB X IDE and Harmony ecosystem. Compared with higher-end PIC32MX3/4/5/6/7 parts, the PIC32MX1xx family omits USB-OTG, Ethernet, and graphics HMI blocks to reduce cost.
Key features include 32 KB Flash (32K x 8), 8 KB SRAM, a 10-bit ADC with up to 13 input channels, four 16-bit timers/counters, two I2C, two SPI, two UART, one Parallel Master Port (PMP), 5-bit parallel I/O, and a CTMU for capacitive touch. The integrated 8 MHz internal RC oscillator can be combined with the PLL to derive the 50 MHz system clock, eliminating external crystals in cost-sensitive designs. The -50I speed grade guarantees 50 MHz across the -40C to +85C industrial range.
Architecturally, the PIC32MX120 combines a 5-stage pipeline MIPS32 M4K core with a tightly-coupled 32 KB Flash controller and dual-bank Flash memory for live-update applications. Prefetch buffers hide Flash latency, allowing zero-wait-state execution at 50 MHz. Separate peripheral buses keep ADC, USB (FS), and I/O traffic off the CPU bus for predictable interrupt response.
Typical applications include consumer electronics user interfaces, USB device peripherals (the device integrates a USB Full-Speed controller), industrial control panels with capacitive touch, low-cost audio processing front-ends, and educational/hobbyist platforms. The compact 6x6 mm VTLA footprint is especially attractive for space-constrained wearable and IoT designs.
When designing with this MCU, ensure the VDD/AVDD/VBAT pins each receive a 0.1 uF plus 10 uF decoupling pair and that the VREF+/VREF- pins are bypassed when the internal ADC reference is used. Programming and debug are handled through Microchip's standard 4-wire ICSP interface, fully supported by MPLAB X IDE and the PICkit 3/4 and ICD 4/5 tools.
This page synthesizes distributor pricing as of 2026-10-01, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet alone, giving engineers an actionable single-page reference for sourcing and implementing this PIC32MX1xx part.
直接替换替代料： PIC32MX120F032DT-50I/TL ——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： PIC32MX120F032DT-50I/TL （相同外形与封装尺寸） ——差异在于 Package, ADC, Core Architecture, Mounting Type, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC32MX120F032D-I/TL
✅ 直接替换✓ 有现货
$2.55 / 个
查看数据手册 →PIC32MX120F032DT-I/TL
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX110F016DT-V/TL
✅ 直接替换✓ 有现货
$2.07 / 个
查看数据手册 →PIC32MX120F032DT-50I/TL 最大额定值与电气特性
| Core | MIPS32 M4K |
| Core Architecture | 32-bit RISC |
| Series | PIC32MX1xx |
| Family | PIC32MX120 |
| Maximum CPU Clock | 50 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| 封装 | 44-VTLA (6x6 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| ADC | 10-bit, up to 13 channels |
| I2C | 2 |
| SPI | 2 |
| UART | 2 |
| Parallel Master Port (PMP) | Yes |
| USB | USB Full-Speed Device |
| Timers | 5 x 16-bit |
| CTMU (Capacitive Touch) | Yes |
| ICSP Programming | Yes (4-wire) |
| Speed Grade | 50 MHz industrial (-50I) |
| RoHS | Compliant |
PIC32MX120F032DT-50I/TL 引脚配置
| 引脚 1 | VDD — Digital supply voltage |
| 引脚 2 | MCLR — Master Clear (reset, active-low) |
| 引脚 3 | PGEC1 — ICSP programming clock |
| 引脚 4 | PGED1 — ICSP programming data |
| 引脚 5 | VSS — Digital ground |
| 引脚 6 | OSC1 — Crystal oscillator input or external clock |
| 引脚 7 | OSC2 — Crystal oscillator output |
| 引脚 8 | RA0 — Port A bit 0 / AN0 |
| 引脚 9 | RA1 — Port A bit 1 / AN1 |
| 引脚 10 | RB0 — Port B bit 0 / AN2 |
| 引脚 11 | RB1 — Port B bit 1 / AN3 |
| 引脚 12 | RB2 — Port B bit 2 / AN4 |
| 引脚 13 | RB3 — Port B bit 3 / AN5 |
| 引脚 14 | RB4 — Port B bit 4 / AN6 |
| 引脚 15 | RB5 — Port B bit 5 / AN7 |
| 引脚 16 | RB6 — Port B bit 6 / AN8 |
| 引脚 17 | RB7 — Port B bit 7 / AN9 |
| 引脚 18 | RC1 — Port C bit 1 |
| 引脚 19 | RC2 — Port C bit 2 |
| 引脚 20 | RC3 — Port C bit 3 |
| 引脚 21 | RC4 — Port C bit 4 |
| 引脚 22 | AVDD — Analog supply voltage |
| 引脚 23 | AVSS — Analog ground |
| 引脚 24 | VREF+ — ADC voltage reference positive |
| 引脚 25 | VREF- — ADC voltage reference negative |
| 引脚 26 | RB8 — Port B bit 8 / AN10 |
| 引脚 27 | RB9 — Port B bit 9 / AN11 |
| 引脚 28 | RB10 — Port B bit 10 / AN12 |
| 引脚 29 | RB11 — Port B bit 11 / AN13 |
| 引脚 30 | RB12 — Port B bit 12 |
| 引脚 31 | RB13 — Port B bit 13 |
| 引脚 32 | RB14 — Port B bit 14 |
| 引脚 33 | RB15 — Port B bit 15 |
| 引脚 34 | RC0 — Port C bit 0 |
| 引脚 35 | RC5 — Port C bit 5 |
| 引脚 36 | RC6 — Port C bit 6 |
| 引脚 37 | RC7 — Port C bit 7 |
| 引脚 38 | RC8 — Port C bit 8 |
| 引脚 39 | RC9 — Port C bit 9 |
| 引脚 40 | D+ — USB Full-Speed D+ |
| 引脚 41 | D- — USB Full-Speed D- |
| 引脚 42 | VUSB — USB 3.3V regulator input |
| 引脚 43 | VDD — Digital supply voltage |
| 引脚 44 | VSS — Digital ground (exposed pad) |
典型应用
PIC32MX120F032DT-50I/TL 适用于 6 应用s: USB HID / CDC Peripherals, Capacitive Touch Control Panels, Industrial Sensor Hubs, Low-Cost Educational / Maker Platforms, Audio Bitstream Decode / USB Audio DACs, Wearable / IoT Edge Nodes.
USB HID / CDC Peripherals
The PIC32MX120F032DT-50I/TL is well-suited for USB Human Interface Device (HID) and Communication Device Class (CDC) peripherals thanks to its integrated USB Full-Speed (12 Mbps) Device controller and dedicated endpoint RAM. The 50 MHz MIPS32 M4K core gives comfortable headroom for HID report processing and CDC serial-data handling, while 8 KB SRAM provides buffer space for USB descriptors and IN/OUT endpoint data. The Microchip Harmony USB Device Stack provides certified class drivers, eliminating the need for custom USB firmware. Typical implementations include USB-to-UART bridges, programmable keypads, and custom HID control surfaces.
推荐
Capacitive Touch Control Panels
The integrated Charge Time Measurement Unit (CTMU) combined with the 10-bit ADC enables robust capacitive touch sensing on up to 13 channels, making the PIC32MX120F032DT-50I/TL ideal for control panels in appliances, audio equipment, and consumer electronics. The 50 MHz MIPS core handles mTouch firmware decoding and debounce in real time, while the 32 KB Flash comfortably fits the mTouch reference library with room for application code. Compared with a discrete touch controller plus MCU solution, the integrated approach reduces BOM cost by roughly USD 0.50 and PCB area by 30-40%.
推荐
Industrial Sensor Hubs
With 13 ADC channels, two UART, two I2C, and two SPI peripherals, the PIC32MX120F032DT-50I/TL is a capable sensor hub for industrial monitoring nodes that aggregate temperature, pressure, and flow measurements. The industrial -40C to +85C operating range matches harsh factory-floor requirements, while the 50 MHz MIPS core executes Modbus RTU frame parsing and sensor linearization in real time. The Parallel Master Port (PMP) enables direct connection to external parallel ADCs or LCD displays without additional bus switches. Reference designs in the Microchip application note library demonstrate complete sensor-to-Ethernet gateway implementations.
推荐
Low-Cost Educational / Maker Platforms
The PIC32MX120F032DT-50I/TL is widely adopted in hobbyist boards and University curricula because the MIPS32 M4K instruction set is straightforward to teach, MPLAB X IDE runs on all major OSes for free, and the PICkit 4 debugger is under USD 50. The 32 KB Flash supports meaningful C-based labs, while 8 KB SRAM is sufficient for buffer-heavy algorithms. The USB Full-Speed interface enables easy connection to host PCs as a CDC serial or HID device for lab data exchange. The 50 MHz speed provides a meaningful step up from PIC16/PIC18 8-bit parts for teaching embedded C and real-time scheduling.
推荐
Audio Bitstream Decode / USB Audio DACs
The PIC32MX120F032DT-50I/TL is suitable for USB audio class 1.0 DAC front-ends, decoding USB isochronous audio packets into I2S data streams for an external DAC chip. The 50 MHz MIPS core handles the USB isochronous endpoint protocol and I2S transmission simultaneously, while the 8 KB SRAM acts as a small audio FIFO between USB and I2S. This frees the external DAC IC (e.g., a PCM5102A) to focus on analog reconstruction. The integrated PMP and DMA engine reduce CPU interrupt load, leaving enough headroom for tone-control DSP if required.
推荐
Wearable / IoT Edge Nodes
The 6x6 mm VTLA footprint of the PIC32MX120F032DT-50I/TL is small enough for wearable and IoT edge node form factors where every mm counts, while the 50 MHz MIPS core executes sensor-fusion loops within tight latency budgets. Low-power sleep modes combined with the Real-Time Clock/Calendar and Wake-on-touch interrupt allow battery-powered designs to achieve months of standby runtime. The CTMU-based touch wake-up avoids continuous polling, and the USB port can be used both for data exchange and for battery charging via a companion power path controller. The Microchip LoRaWAN / Sigfox libraries run on this part.
推荐
推荐产品汇总
工程参考数据： PIC32MX120F032DT-50I/TL ——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 | PIC32MX120F032D-I/TL | PIC32MX120F032DT-I/TL | PIC32MX110F016DT-V/TL | STM32F050C8T6 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | STMicroelectronics |
| Package | 44-VTLA (6x6) | 44-VTLA (6x6) - same | 44-VTLA (6x6) - same | 44-VTLA (6x6) - same | LQFP-48 - not pin-compatible |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | ARM Cortex-M0 |
| Max Clock | 50 MHz | 40 MHz | 40 MHz | 50 MHz | 50 MHz |
| Flash | 32 KB | 32 KB | 32 KB | 16 KB | 64 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 4 KB | 8 KB |
| USB | USB FS Device | USB FS Device | USB FS Device | USB FS Device | USB FS Device |
| ADC | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 10-bit, 13 channels | 12-bit, 10 channels |
关键差异点
- Lowest-cost 32-bit USB MCU in Microchip's PIC32 portfolio （对比 STM32F050C8T6)
- 50 MHz speed grade for compute headroom vs the -I/TL 40 MHz variant （对比 PIC32MX120F032D-I/TL)
- More memory and USB-OTG vs the PIC32MX110 （对比 PIC32MX110F016DT-V/TL)
设计说明
Decouple every VDD/AVDD/VBAT pin with a 0.1 uF ceramic plus a bulk 10 uF ceramic placed within 5 mm of the pin. The PIC32MX120's USB D+/D- pins require a 0.1 uF + 10 uF pair on VUSB to provide a clean 3.3V for the internal USB transceiver, otherwise USB eye-pattern compliance testing may fail. Add a ferrite bead between VDD and AVDD when the ADC reads high-impedance analog signals at full scale to suppress digital switching noise coupling into the analog reference.
Estimated: At 50 MHz with all peripherals active and 1.05V core voltage, the typical active current is approximately 30 mA from VDD, dissipating ~95 mW internally. The 44-pin VTLA package exposed pad must be soldered to a continuous ground copper pour of at least 25 mm^2 to stay within the 31.4 C/W junction-to-ambient thermal resistance. For industrial designs with continuous USB activity, expect a 25-30 C junction temperature rise above ambient, well within the 125 C maximum.
Route the USB D+/D- traces as a 90 ohm differential pair, length-matched within 2 mm, with no via stubs. Keep the traces over a continuous ground plane and avoid routing them parallel to switching power or PWM signals. Place the ICSP programming pins PGEC1/PGED1 near an accessible header or test pad; the 4-wire ICSP interface is required for in-circuit debugging with MPLAB X IDE and PICkit 4. Ensure MCLR has a 10 kohm pull-up to VDD and a 100 nF cap to ground for reset noise immunity.
Do not confuse the 50I speed grade (-50I/TL) with the 40 MHz grade (-I/TL): both are industrial temperature range but have different fmax. Programming voltage on MCLR must NOT exceed VDD + 0.3V or the ICSP interface may latch-up. When using the internal 8 MHz FRC with PLL, configure the PLL multiplier and divider registers exactly per the datasheet's PLL configuration tables; values outside the specified range will fail to lock or produce out-of-spec system clocks.
合规信息
RoHS and lead-free status per Microchip product page. Not AEC-Q100 qualified - use PIC32MX1xx AEC variants for automotive.
