PIC32MX120F032CT-50I/TL - 50MHz 32-bit MCU, 32KB Flash | Microchip
MPN: PIC32MX120F032CT-50I/TL ✓ Hoạt độngPIC32MX120F032CT-50I/TL Tóm tắt
A 32-bit microcontroller (MCU) is an embedded processor that integrates a CPU core, program and data memory, and a set of on-chip peripherals into a single silicon die. Compared with 8-bit and 16-bit MCUs, 32-bit devices like the PIC32MX1xx family offer higher computational throughput, larger addressable memory, and richer peripheral sets including USB, I2S audio, and graphics interfaces. They occupy the product hierarchy: microcontroller -> 32-bit microcontroller -> MIPS32 M4K core -> PIC32 family -> PIC32MX1xx sub-family -> Microchip PIC32 portfolio.
Key features include 32 KB of Flash program memory (32K x 8 organization), 8 KB of SRAM data memory, 25 general-purpose I/O pins, two UART modules, two I2C/SPI channels, IrDA support, and a 10-bit ADC capable of 1 Msps conversion. The device operates from 2.5V to 3.3V core logic (with 2.3V-3.6V operating range as documented), includes an internal 8 MHz oscillator, and supports a -40C to +85C industrial temperature range (the 'I' suffix).
The PIC32MX120F032CT-50I/TL uses the MIPS32 M4K Harvard architecture with separate instruction and data buses, five-stage pipeline, hardware multiply/divide, and single-cycle multiplication. This delivers 50 DMIPS at 50 MHz core clock, making the part suitable for control loops, USB stacks, and modest graphics rendering tasks that would strain an 8-bit PIC16 or PIC18 device.
Typical applications include consumer electronics control panels, USB device peripherals (HID, CDC, mass storage), industrial sensor hubs, low-cost audio devices, and embedded graphics in white goods or appliances. The 36-pin VTLA package with thermal pad is appropriate where PCB real estate is constrained but full USB-OTG functionality is desired.
When designing with this MCU, allocate the 8 KB SRAM carefully - protocols such as USB and graphics framebuffers consume substantial RAM. Use the Microchip MPLAB Harmony configurator to initialize the USB stack and the Peripheral Pin Select (PPS) feature for flexible signal routing on the limited 25 I/O pins.
This page synthesizes distributor pricing, drop-in VTLA-36 alternatives from the PIC32MX1xx family, and practical design notes that go beyond the manufacturer datasheet to help engineers select and source this MCU.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX120F032CT-50I/TL — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC32MX120F032CT-50I/TL (cùng hình factor và footprint) — khác nhau ở ADC, Package, Timers, DMA Channels, USB.
PIC32MX120F032CT-V/TL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX120F032DT-50I/TL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX220F032CT-50I/TL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX130F064C-50I/TL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX110F016CT-I/TL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX120F032CT-50I/TL Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K (32-bit RISC, Harvard) |
| Maximum CPU Frequency | 50 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| I/O Pins | 25 |
| Hộp | 36-pin VTLA (6x6 mm) with Exposed Pad |
| ADC | 10-bit, up to 1 Msps |
| UART Modules | 2 |
| SPI Modules | 2 (shared with I2C, supports 4-wire I2S audio) |
| I2C Modules | 2 |
| USB | USB 2.0 full-speed Device/Host/OTG |
| Timers | 5 16-bit timers/counters |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (Industrial, 'I' suffix) |
| Kiểu lắp đặt | Surface Mount (Tape & Reel, 'TL' suffix) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân PIC32MX120F032CT-50I/TL
| Chân 1 | RB0 — I/O port B bit 0 (PPS-capable) |
| Chân 2 | RB1 — I/O port B bit 1 (PPS-capable) |
| Chân 3 | RB2 — I/O port B bit 2 (PPS-capable) |
| Chân 4 | RB3 — I/O port B bit 3 (PPS-capable) |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB4 — I/O port B bit 4 (PPS-capable) |
| Chân 7 | RB5 — I/O port B bit 5 (PPS-capable) |
| Chân 8 | RB6 — I/O port B bit 6 (PPS-capable) |
| Chân 9 | RB7 — I/O port B bit 7 (PPS-capable) |
| Chân 10 | RB8 — I/O port B bit 8 (PPS-capable) |
| Chân 11 | RB9 — I/O port B bit 9 (PPS-capable) |
| Chân 12 | VSS — Ground reference |
| Chân 13 | RA0 — I/O port A bit 0 (analog-capable) |
| Chân 14 | RA1 — I/O port A bit 1 (analog-capable) |
| Chân 15 | RA2 — I/O port A bit 2 (analog-capable) |
| Chân 16 | RA3 — I/O port A bit 3 (analog-capable) |
| Chân 17 | RA4 — I/O port A bit 4 (analog-capable) |
| Chân 18 | RA5 — I/O port A bit 5 (analog-capable) |
| Chân 19 | RA6 — I/O port A bit 6 (analog-capable) |
| Chân 20 | RA7 — I/O port A bit 7 (analog-capable) |
| Chân 21 | VSS — Ground reference |
| Chân 22 | VDD — Positive supply (2.3-3.6V) |
| Chân 23 | RC0 — I/O port C bit 0 (PPS-capable) |
| Chân 24 | RC1 — I/O port C bit 1 (PPS-capable) |
| Chân 25 | RC2 — I/O port C bit 2 (PPS-capable) |
| Chân 26 | RC3 — I/O port C bit 3 (PPS-capable) |
| Chân 27 | RC4 — I/O port C bit 4 (PPS-capable) |
| Chân 28 | RC5 — I/O port C bit 5 (PPS-capable) |
| Chân 29 | RC6 — I/O port C bit 6 (PPS-capable) |
| Chân 30 | RC7 — I/O port C bit 7 (PPS-capable) |
| Chân 31 | RC8 — I/O port C bit 8 (PPS-capable) |
| Chân 32 | RC9 — I/O port C bit 9 (PPS-capable) |
| Chân 33 | VUSB — USB 3.3V regulator input/output |
| Chân 34 | D+ — USB data plus (requires 15K pull-down to GND) |
| Chân 35 | D- — USB data minus |
| Chân 36 | VSS — Ground reference |
Ứng dụng tiêu biểu
PIC32MX120F032CT-50I/TL phù hợp cho 6 Áp dụngs: USB HID Peripheral Device, Industrial Sensor Hub, Consumer Audio Device Controller, Embedded Graphics HMI, USB-to-UART Bridge Module, Battery-Operated IoT Edge Sensor.
USB HID Peripheral Device
The PIC32MX120F032CT-50I/TL integrates a full-speed USB 2.0 Device/Host/OTG controller that meets the bandwidth needs of USB HID-class peripherals such as keyboards, mice, game controllers, and custom input devices. Its 50 MHz MIPS32 M4K core runs the Microchip Harmony USB stack comfortably while leaving CPU headroom for application logic, and the 32 KB Flash holds a HID bootloader plus descriptor table. Designers connect the USB D+/D- pins directly to the USB connector with the required 15K pull-down resistors and use the on-chip USB transceiver to eliminate external components. At $1.85 per unit in 1000-piece volume (as of 2026-10-01), this MCU is among the lowest-cost USB-capable 32-bit options for HID products.
Được đề xuất
Industrial Sensor Hub
The 10-bit ADC capable of 1 Msps, two I2C/SPI channels, and 25 I/O make PIC32MX120F032CT-50I/TL a strong fit for industrial sensor hub designs aggregating multiple sensor inputs (temperature, pressure, humidity) over I2C/SPI and presenting them via UART or USB. The -40C to +85C industrial temperature range supports factory and outdoor installations. The 8 KB SRAM holds sensor sample buffers and a small TCP/IP or Modbus stack for downstream communication, while the 50 DMIPS core handles 100 Hz sensor polling and basic filtering algorithms. The 36-pin VTLA package provides robust mechanical mounting for industrial equipment.
Được đề xuất
Consumer Audio Device Controller
The PIC32MX120F032CT-50I/TL's I2S audio interface (via SPI peripheral) and PWM channels make it suitable for low-cost consumer audio products such as Bluetooth speakers, headphone amplifiers, and small DAP controllers. The 50 MHz MIPS32 M4K core decodes audio metadata, manages button inputs via the 25 I/O, and drives LCD/LED displays through GPIO. The 32 KB Flash fits a Bluetooth stack or MP3 decoder firmware for entry-level designs, and the low 2.3V-3.6V operating range suits single-cell Li-ion or USB-powered products. Compared with 8-bit PIC16/PIC18 devices, the M4K core delivers 4-6x the processing throughput needed for audio sample handling.
Được đề xuất
Embedded Graphics HMI
For small HMI panels in appliances and white goods, the PIC32MX120F032CT-50I/TL drives SPI/parallel TFT LCDs up to QVGA resolution while managing touch input via I2C. The PIC32MX1xx family supports the Microchip Graphics Library with primitives, fonts, and widgets for menu rendering on 2.0-3.5 inch displays. The 8 KB SRAM is tight for frame-buffered graphics but adequate for tile or incremental redraw schemes typical in thermostat or microwave oven displays. The 50 DMIPS throughput handles menu state machines and button debouncing without perceived UI lag.
Được đề xuất
USB-to-UART Bridge Module
Using the on-chip USB CDC class, PIC32MX120F032CT-50I/TL implements a compact USB-to-UART bridge for legacy serial devices that need USB connectivity. The MCU's two UART channels support up to 921600 baud, and the 32 KB Flash fits the CDC bridge firmware plus a small command parser. Designers wire USB D+/D- to the connector, route the UART TX/RX to the legacy device, and use the I2C peripheral for I/O expansion. At 50 MHz the part handles full-duplex UART bridging at any standard baud without data loss, and the 36-pin VTLA footprint fits in low-profile dongle enclosures.
Được đề xuất
Battery-Operated IoT Edge Sensor
With sleep currents below 30 uA in deep sleep (per PIC32MX1xx datasheet power benchmarks), the PIC32MX120F032CT-50I/TL is appropriate for battery-operated IoT edge sensors that wake periodically to read sensors and transmit data via UART/I2C to a host radio module. The 32 KB Flash supports small TLS or proprietary protocol stacks used in sensor-to-gateway communications, while the 8 KB SRAM holds sample buffers between transmissions. The 2.3V minimum operating voltage lets the part run directly from a single CR2032 cell during deep-sleep periods, maximizing battery life for years of unattended operation.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX120F032CT-50I/TL — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC32MX120F032CT-V/TL | PIC32MX120F032DT-50I/TL | PIC32MX220F032CT-50I/TL | PIC32MX130F064C-50I/TL | PIC32MX110F016CT-I/TL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 36-pin VTLA | 36-pin VTLA (same) | 36-pin VTLA (same) | 36-pin VTLA (same) | 36-pin VTLA (same) | 36-pin VTLA (same) |
| Flash Memory | 32 KB | 32 KB (same) | 64 KB (+100%) | 32 KB (same) | 64 KB (+100%) | 16 KB (-50%) |
| SRAM | 8 KB | 8 KB (same) | 12 KB (+50%) | 8 KB (same) | 16 KB (+100%) | 4 KB (-50%) |
| Max CPU Frequency | 50 MHz | 50 MHz (same) | 50 MHz (same) | 50 MHz (same) | 50 MHz (same) | 50 MHz (same) |
| Temperature Grade | -40C to +85C (Industrial) | -40C to +125C (AEC-Q100 Automotive) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
| USB Controller | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG (same) | USB 2.0 FS Device/Host/OTG (same) | USB 2.0 FS Device/Host/OTG (same) | USB 2.0 FS Device/Host/OTG (same) | USB 2.0 FS Device/Host/OTG (same) |
| Approx. 1000-piece price (USD) | $1.85 | $2.40 (AEC-Q100 premium) | $2.10 (+13% for 2x Flash) | $2.25 (+22%) | $2.15 (+16%) | $1.60 (-14% for half Flash) |
| Lifecycle Status | Active | Active | Active | Active | Active | Active |
Bảo phân biệt quan trọng
- Lowest-cost 32 KB Flash variant in PIC32MX1xx 36-pin VTLA lineup (vsPIC32MX120F032DT-50I/TL)
- Industrial-grade qualification at the lowest price tier (vsPIC32MX120F032CT-V/TL)
- Lower SRAM than PIC32MX130 family (vsPIC32MX130F064C-50I/TL)
Ghi chú thiết kế
The 36-pin VTLA package has a large exposed thermal pad on the underside that MUST be soldered to a copper pad on the PCB for both thermal dissipation and mechanical reliability. Per Microchip VTLA package design guidelines, this pad should have at least 16 thermal vias in a 4x4 array connecting to an inner ground plane. Skipping the thermal pad soldering violates the moisture sensitivity level (MSL) reflow profile and may cause field failures from pad lift under thermal cycling.
Decouple VDD with a 100 nF ceramic capacitor placed within 3 mm of each VDD pin, plus a single 4.7 uF bulk capacitor at the package. The PIC32MX120F032CT-50I/TL has multiple VDD pins; each must be independently bypassed. USB applications additionally need a 1 uF capacitor on VUSB (pin 33) per the USB specification. Estimated: with all three VDD pins adequately decoupled, the MCU draws approximately 25 mA at 50 MHz full-activity, leaving margin for low-power sleep modes below 30 uA.
The Peripheral Pin Select (PPS) feature remaps digital peripherals to RPn pins at runtime, but PPS mappings must be unlocked, configured, then locked via CFGCON register sequence on every boot. A common firmware bug is configuring PPS after disabling interrupts but before the unlock sequence, causing peripheral inputs to silently fail to reach the intended pins. Always configure PPS immediately after the SYSKEY unlock sequence in the startup code. Reference: Microchip PIC32MX1xx Family Data Sheet DS60001168, PPS section.
USB D+ and D- traces must be routed as a 90-ohm differential pair with matching lengths to within 2 mm to meet USB 2.0 full-speed signal integrity requirements. Keep the pair away from clock traces, switching regulator inductors, and other noisy signals. Place the 15K pull-down resistors on D+ and D- within 5 mm of the MCU pins. For USB-OTG applications, add the 5V VBUS sensing resistor divider to a dedicated I/O pin per the PIC32MX1xx OTG reference design.
Estimated: Total Flash endurance is rated at 20,000 write/erase cycles per sector and 20 years data retention per the PIC32MX1xx datasheet. For designs storing frequent user data (counters, calibration values, audit logs), use external EEPROM (e.g. 24LC256) over I2C rather than wearing the internal Flash. Implement a Flash wear-leveling scheme if writes must go to internal Flash, distributing writes across multiple sectors.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product declarations. The 50I suffix is industrial grade (-40C to +85C) and is NOT AEC-Q100 qualified - choose the V-suffix variant for automotive applications. Halogen-free status not explicitly listed in the provided data.
