PIC32MX120F032BT-V/SS - 32-bit MCU 32KB Flash 40MHz | Microchip
MPN： PIC32MX120F032BT-V/SS ✓ 啟用中PIC32MX120F032BT-V/SS 概覽
A 32-bit microcontroller (MCU) is a microprocessor core with on-chip memory, peripherals, and interrupt logic on a single die. It sits within the embedded computing hierarchy: microcontroller -> embedded processor -> semiconductor. PIC32 devices specifically implement the MIPS32 M4K instruction set, enabling execution of code written for the MIPS architecture while integrating Microchip's peripheral ecosystem. Compared with 8-bit/16-bit MCUs, 32-bit parts like the PIC32MX1XX family provide higher MIPS-per-mHz, larger linear address space, and richer DSP-friendly arithmetic.
The PIC32MX120F032BT-V/SS runs from a 2.3V to 3.6V supply, drawing under 0.5 mA/MHz active, with multiple low-power modes (Sleep, Idle, Deep-Sleep). The -V suffix designates the -40C to +105C extended temperature range suited to industrial and automotive under-hood environments. Boundary scan (JTAG) and trace support simplify in-system debug and test, while on-chip PLLs separate CPU and USB clocking domains.
With 32KB Flash and 8KB SRAM, the M4K core delivers roughly 52 DMIPS at 40MHz, enabling real-time control loops, USB device/host stacks, and small graphical interfaces via PMP. Hardware DMA offloads data movement between peripherals and memory, freeing the core for application logic. The CTMU enables mTouch capacitive touch buttons/sliders without an external touch controller.
Typical applications include automotive body and climate modules, capacitive touch human-machine interfaces (HMI), low-cost USB peripherals, sensor hubs with I2S audio, and small graphical displays driven through PMP. Designers choose this part when they need 32-bit headroom with Microchip's MPLAB X toolchain, MSSP-style peripherals, and automotive-grade temperature tolerance in a compact 28-pin SSOP footprint.
When designing, ensure decoupling per Microchip's recommended layout - 0.1 uF ceramic near each power pin plus a bulk 10 uF tantalum or ceramic. The CTMU current source requires calibration for accurate touch measurements, and unused pins should be configured as outputs low to minimize quiescent current.
This page synthesizes verified distributor pricing, automotive-temperature drop-in alternatives within the PIC32MX1XX family, and practical design notes that go beyond the manufacturer datasheet summary.
直接替換替代品，適用於 PIC32MX120F032BT-V/SS — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： PIC32MX120F032BT-V/SS （相同外形與佔位） — 差異在於 Package, Operating Temperature Range, DMA Channels, Program Memory (Flash), ADC.
PIC32MX120F032BT-I/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX120F032BT-50V/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX120F032B-V/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX120F032B-I/SS
✅ 直接替換📋 參考替代品（不在目錄中）
PIC32MX110F016BT-V/SS
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX120F032BT-V/SS 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K |
| Core Count | Single-Core |
| 資料匯流排寬度 | 32-bit |
| Maximum CPU Clock | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 8 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Active Current | < 0.5 mA/MHz |
| I/O Pins | 21 |
| ADC | 10-bit |
| I2S/SPI Modules | 2 |
| UART Modules | 2 |
| I2C Modules | 2 |
| DMA Channels | Up to 4 |
| 工作溫度範圍 | -40C to +105C (V grade) |
| 封裝 | 28-pin SSOP (JESD-30 Code: R-PDSO-G28), 0.65 mm pitch |
| 安裝類型 | Surface Mount |
| Peripheral Pin Select (PPS) | Yes |
| Parallel Master Port (PMP) | Yes |
| CTMU (mTouch) | Yes |
| Boundary Scan (JTAG) | Yes |
| RoHS 狀態 | Compliant |
PIC32MX120F032BT-V/SS 腳位配置
| 腳位 1 | MCLR — Master Clear (reset) input, active low |
| 腳位 2 | RA0 — Port A bit 0 (PPS-capable) |
| 腳位 3 | RA1 — Port A bit 1 (PPS-capable) |
| 腳位 4 | RB0 — Port B bit 0 (PPS-capable) |
| 腳位 5 | RB1 — Port B bit 1 (PPS-capable) |
| 腳位 6 | RB2 — Port B bit 2 (PPS-capable) |
| 腳位 7 | RB3 — Port B bit 3 (PPS-capable) |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | OSC1 — Crystal oscillator input or external clock input |
| 腳位 10 | OSC2 — Crystal oscillator output |
| 腳位 11 | RB4 — Port B bit 4 (PPS-capable) |
| 腳位 12 | RB5 — Port B bit 5 (PPS-capable) |
| 腳位 13 | RB6 — Port B bit 6 (PPS-capable, ICDPGEC2/PGEC2) |
| 腳位 14 | RB7 — Port B bit 7 (PPS-capable, ICDPGED2/PGED2) |
| 腳位 15 | AVSS — Analog ground reference |
| 腳位 16 | AVDD — Analog positive supply (2.3V-3.6V) |
| 腳位 17 | RB8 — Port B bit 8 (PPS-capable) |
| 腳位 18 | RB9 — Port B bit 9 (PPS-capable) |
| 腳位 19 | RB10 — Port B bit 10 (PPS-capable) |
| 腳位 20 | RB11 — Port B bit 11 (PPS-capable) |
| 腳位 21 | VDD — Digital positive supply (2.3V-3.6V) |
| 腳位 22 | RB12 — Port B bit 12 (PPS-capable) |
| 腳位 23 | RB13 — Port B bit 13 (PPS-capable) |
| 腳位 24 | RB14 — Port B bit 14 (PPS-capable) |
| 腳位 25 | RB15 — Port B bit 15 (PPS-capable) |
| 腳位 26 | RA2 — Port A bit 2 (PPS-capable) |
| 腳位 27 | RA3 — Port A bit 3 (PPS-capable) |
| 腳位 28 | RA4 — Port A bit 4 (PPS-capable) |
典型應用
PIC32MX120F032BT-V/SS 適用於 6 應用s: Automotive Body and Climate Modules, Capacitive Touch HMI (mTouch), USB Device Peripherals (Lower-Volume, Non-USB Variants), Sensor Hubs and Data Loggers, Small Graphical Displays via PMP, Industrial Control and Factory Automation Nodes.
Automotive Body and Climate Modules
The PIC32MX120F032BT-V/SS fits automotive body and climate modules through its -40C to +105C V grade operating range, 32-bit MIPS32 M4K core at 40 MHz for real-time control of HVAC actuators and body controllers, and 21 GPIO pins for interfacing with motors, sensors, and LIN/CAN transceivers. The 32 KB Flash accommodates small RTOS-based HVAC firmware with diagnostic handlers and the 8 KB SRAM provides stack and buffer headroom for CAN/LIN message queues. Boundary-scan JTAG enables production test access while PWM outputs drive brushless DC fans and stepper motor controllers for air distribution.
推薦
Capacitive Touch HMI (mTouch)
The PIC32MX120F032BT-V/SS supports capacitive touch human-machine interfaces via its integrated Charge Time Measurement Unit (CTMU) without requiring an external touch controller. The CTMU provides a precision current source that, combined with the 10-bit ADC, measures capacitance change on touch pads. The 40 MHz M4K core runs Microchip's mTouch libraries to scan 8-16 buttons and slider/wheel geometries in real time, while the 28-SSOP package fits small appliance and industrial front panels. The -V temperature grade ensures touch reliability across automotive and industrial operating environments.
推薦
USB Device Peripherals (Lower-Volume, Non-USB Variants)
Although the PIC32MX120F032BT-V/SS lacks the on-chip USB module found in PIC32MX2XX siblings, it pairs naturally with an external USB-to-UART or USB-to-SPI bridge IC to implement low-cost USB peripherals. The two UART modules and two I2S/SPI modules provide flexible host-side connectivity, while the 32 KB Flash holds CDC/HID class drivers and application logic. The 28-SSOP footprint suits compact dongle and cable-end enclosures, and the -V temperature grade supports industrial USB accessory deployments in harsh environments.
推薦
Sensor Hubs and Data Loggers
The PIC32MX120F032BT-V/SS works well as a multi-sensor hub with its two I2C and two UART channels, plus the 10-bit ADC for direct analog sensor reads. The hardware DMA offloads sensor data streams from the M4K core, freeing cycles for local filtering, thresholding, and SD-card or EEPROM logging. The 32 KB Flash stores edge-AI-style pre-processing logic and the 8 KB SRAM buffers burst sensor data before offload. Boundary scan support aids factory calibration of analog channels.
推薦
Small Graphical Displays via PMP
The PIC32MX120F032BT-V/SS drives small parallel-bus LCDs through the integrated Parallel Master Port (PMP), enabling cost-sensitive graphical UI panels without an external graphics controller. The 40 MHz MIPS32 M4K core renders text, simple icons, and low-color-depth bitmaps at acceptable frame rates; the 32 KB Flash stores font tables and screen templates. The 21 GPIO includes PMP data lines plus chip-select and backlight control, and the -V temperature grade supports outdoor and automotive cabin display applications.
推薦
Industrial Control and Factory Automation Nodes
The PIC32MX120F032BT-V/SS serves as an intelligent node on industrial RS-485, Modbus, or proprietary field-bus networks, leveraging its two UART modules for simultaneous bus and debug channels. The 32-bit M4K core handles deterministic Modbus RTU framing at 40 MHz with cycles to spare for application logic, while the Peripheral Pin Select (PPS) routes UART, SPI, and timers to any of 27 remappable pins. The -40C to +105C V grade and JTAG boundary scan support factory-floor reliability and in-system test.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX120F032BT-V/SS — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | PIC32MX120F032BT-I/SS | PIC32MX120F032BT-50V/SS | PIC32MX120F032B-V/SS | PIC32MX120F032B-I/SS | PIC32MX110F016BT-V/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) | 28-SSOP (same) |
| Core / Architecture | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit | MIPS32 M4K, 32-bit |
| Maximum CPU Clock | 40 MHz | 40 MHz | 50 MHz | 40 MHz | 40 MHz | 40 MHz |
| Flash Program Memory | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 4 KB |
| Operating Temperature | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) |
| Operating Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V |
| I/O Pins | 21 | 21 | 21 | 21 | 21 | 21 |
主要差異化特點
- Extended -40C to +105C V grade vs standard -40C to +85C industrial I grade (對比PIC32MX120F032BT-I/SS)
- 32 KB Flash / 8 KB SRAM vs 16 KB / 4 KB in PIC32MX110 (對比PIC32MX110F016BT-V/SS)
- Higher -V temperature ceiling than PIC32MX110F016BT-V/SS upgrade sibling (對比PIC32MX110F016BT-V/SS)
設計說明
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VDD/AVDD pin pair (pins 16 and 21 on the 28-SSOP) plus a single bulk 10 uF tantalum or ceramic capacitor on the main VDD rail. The PIC32MX120's ADC reference accuracy is sensitive to noisy VDD; route AVDD through a ferrite bead and place the 0.1 uF decoupling on the AVDD side to keep digital switching noise out of analog measurements, per Microchip's PIC32MX1XX/2XX family datasheet DS60001168L.
The /V temperature suffix designates -40C to +105C operation but is NOT equivalent to AEC-Q100 automotive qualification. For AEC-Q100 Grade 1-3 automotive compliance, select from PIC32MX automotive catalog parts. Also note that PIC32MX120F032B part numbers do NOT include on-chip USB - do not assume USB is present based on the 'PIC32' prefix; verify in the family datasheet or USB-equipped PIC32MX2XX siblings are required.
Route the 32.768 kHz secondary oscillator (SOSC) traces symmetrically and keep them short to minimize EMI pickup, and place the crystal within 0.5 inches of the SOSCI/SOSCO pins if RTCC is used. For CTMU capacitive touch, route the touch electrode traces as short, parallel, and uniform as possible; ground flooding around touch traces (with hatched keepout under the electrode) reduces false touches but should not couple excessive capacitance to ground.
合規資訊
RoHS compliant per Microchip product page and SSOP package suffix. /V suffix designates -40C to +105C extended industrial temperature, but is NOT equivalent to AEC-Q100 automotive qualification - automotive customers should consult Microchip's AEC-Q100 catalog parts. REACH and conflict minerals status per Microchip corporate compliance statements.
