PIC32MX250F128BT-V/SO - 32-bit MCU 128KB Flash 40MHz 28-SOIC | Microchip
料号： PIC32MX250F128BT-V/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.65 | $5.65 |
| 10 | $5.08 | $50.80 |
| 100 | $4.52 | $452.00 |
| 500 | $4.05 | $2,025.00 |
| 1,000 | $3.62 | $3,620.00 |
PIC32MX250F128BT-V/SO 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile working memory (SRAM), and a rich set of digital and analog peripherals. Within the broader taxonomy, this part belongs to the PIC32MX family of MIPS-based 32-bit microcontrollers, which sits inside the Microcontroller category, which itself falls under Integrated Circuits and finally Semiconductors. The M4K core implements a 32-bit load/store RISC architecture with hardware multiply/divide and a five-stage pipeline, giving PIC32MX parts a deterministic, interrupt-friendly execution model favored in real-time control.
Key differentiating features include Peripheral Pin Select (PPS), which remaps digital I/O functions to any compatible pin to ease PCB layout, two I2S/SPI modules for codec and serial communication, a Parallel Master Port (PMP) for graphics or external memory interfaces, and mTouch capacitive touch support. The 10-bit ADC and 1 ns input-capture resolution provide high-resolution analog and timing measurement for motor, sensor, and instrumentation designs. On-chip temperature measurement is also available.
Typical applications include industrial control panels, low-cost graphic HMIs via PMP, USB-enabled consumer devices, capacitive touch user interfaces, audio playback with I2S codecs, and sensor hubs in appliance or HVAC systems. The 28-SOIC footprint is friendly for hand-soldered prototypes and cost-optimized production lines where QFN reflow equipment is not required.
For designs that need additional USB or higher pin count, consider migrating within the PIC32MX family. A subtle design tip is to enable the JTAG disable fuse in production code to recover the I/O pins and protect firmware IP. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes beyond what is summarized in the manufacturer datasheet.
直接替换替代料： PIC32MX250F128BT-V/SO ——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： PIC32MX250F128BT-V/SO （相同外形与封装尺寸） ——差异在于 ADC, Package, Core Architecture, Timers, Program Memory (Flash).
快速对比工具——选择替代料号进行并排对比：
PIC32MX250F128BT-I/SO
✅ 直接替换✓ 有现货
$3.62 / 个
查看数据手册 →PIC32MX250F128B-I/SO
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX250F128BT-V/ML
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC32MX150F128BT-V/SO
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.81 / 个
查看数据手册 →PIC32MX220F032BT-I/SO
✅ 直接替换✓ 有现货
$1.62 / 个
查看数据手册 →PIC32MX250F128BT-V/SO 最大额定值与电气特性
| Core Architecture | MIPS32 M4K |
| Core Count | Single-Core 32-bit |
| Maximum CPU Frequency | 40 MHz |
| DMIPS Performance | 83 DMIPS |
| Program Memory (Flash) | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| ADC | 10-bit |
| I2S / SPI Modules | 2 |
| Parallel Master Port (PMP) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| mTouch Capacitive Touch | Supported |
| Input Capture Resolution | 1 ns |
| On-chip Temperature Sensor | Yes |
| Active Current Consumption | 0.5 mA/MHz typical |
| 工作温度范围 | -40 C to +105 C (V grade) |
| 封装 | 28-SOIC (SO) |
| 引脚数量 | 28 |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC32MX250F128BT-V/SO 引脚配置
| 引脚 1 | MCLR — Master Clear (reset) input, active-low |
| 引脚 2 | RA0 — Port A bit 0 / PPS-remappable I/O / analog input |
| 引脚 3 | RA1 — Port A bit 1 / PPS-remappable I/O / analog input |
| 引脚 4 | RB0 — Port B bit 0 / PPS-remappable I/O / analog input |
| 引脚 5 | RB1 — Port B bit 1 / PPS-remappable I/O / analog input |
| 引脚 6 | RB2 — Port B bit 2 / PPS-remappable I/O / analog input |
| 引脚 7 | RB3 — Port B bit 3 / PPS-remappable I/O / analog input |
| 引脚 8 | VSS — Ground reference |
| 引脚 9 | OSCI — Crystal oscillator input or external clock |
| 引脚 10 | OSCO — Crystal oscillator output |
| 引脚 11 | RB4 — Port B bit 4 / PPS-remappable I/O |
| 引脚 12 | RB5 — Port B bit 5 / PPS-remappable I/O |
| 引脚 13 | RB6 — Port B bit 6 / PPS-remappable I/O |
| 引脚 14 | RB7 — Port B bit 7 / PPS-remappable I/O |
| 引脚 15 | VDD — Positive supply 2.3 V to 3.6 V |
| 引脚 16 | RA2 — Port A bit 2 / PPS-remappable I/O / analog input |
| 引脚 17 | RA3 — Port A bit 3 / PPS-remappable I/O / analog input |
| 引脚 18 | RA4 — Port A bit 4 / PPS-remappable I/O / analog input |
| 引脚 19 | RA5 — Port A bit 5 / PPS-remappable I/O / analog input |
| 引脚 20 | RA6 — Port A bit 6 / PPS-remappable I/O |
| 引脚 21 | RA7 — Port A bit 7 / PPS-remappable I/O |
| 引脚 22 | VSS — Ground reference |
| 引脚 23 | RB8 — Port B bit 8 / PPS-remappable I/O |
| 引脚 24 | RB9 — Port B bit 9 / PPS-remappable I/O |
| 引脚 25 | RB10 — Port B bit 10 / PPS-remappable I/O |
| 引脚 26 | RB11 — Port B bit 11 / PPS-remappable I/O |
| 引脚 27 | RB12 — Port B bit 12 / PPS-remappable I/O |
| 引脚 28 | RB14 — Port B bit 14 / PPS-remappable I/O |
典型应用
PIC32MX250F128BT-V/SO 适用于 6 应用s: Industrial Control Panels, Capacitive Touch User Interfaces, Low-Cost Graphic HMI with PMP, USB Audio Playback Devices, Appliance Sensor Hubs, Battery-Connected IoT Edge Nodes.
Industrial Control Panels
The PIC32MX250F128BT-V/SO is well suited for industrial control panel designs thanks to its -40C to +105C operating range, 0.5 mA/MHz active current, and 83 DMIPS throughput at 40 MHz. The 128 KB Flash holds a full Modbus RTU master plus HMI state machine, while 32 KB SRAM buffers incoming UART frames. PMP drives character LCDs directly. PPS remaps any digital peripheral to convenient PCB pins.
推荐
Capacitive Touch User Interfaces
The PIC32MX250F128BT-V/SO integrates Microchip's mTouch capacitive touch library support, 1 ns input-capture resolution, and 32 KB SRAM for slider/wheel decoding in capacitive touch user interfaces. The 10-bit ADC samples a charge-transfer sensor array at high rate without taxing the CPU. Low 0.5 mA/MHz active current extends runtime on battery-powered appliances with touch panels.
推荐
Low-Cost Graphic HMI with PMP
The PIC32MX250F128BT-V/SO drives low-cost graphic HMI displays using its Parallel Master Port (PMP) at up to 40 MHz, with 128 KB Flash storing framebuffer helpers and the M4K core refreshing STN/QVGA panels without DMA. PPS lets the designer reserve more pins for touch scanning. The 28-SOIC footprint simplifies hand-rework of prototype HMIs.
推荐
USB Audio Playback Devices
The PIC32MX250F128BT-V/SO enables USB audio playback devices using its USB Full-Speed device controller and two I2S/SPI modules for external audio codecs such as the PIC32 audio DAC family. With 128 KB Flash and 32 KB SRAM, the part runs USB HID plus a small WAV decoder comfortably. On-chip temperature sensing helps thermal foldback in amplified outputs.
推荐
Appliance Sensor Hubs
The PIC32MX250F128BT-V/SO is a strong fit for appliance sensor hubs such as washing machines, dishwashers, and HVAC controls thanks to its -40C to +105C operating temperature and PPS-driven flexible I/O mapping. The 10-bit ADC with on-chip temperature sensor and 1 ns input-capture timer combine to monitor motor RPM, NTC thermistors, and capacitive water-level probes simultaneously with predictable interrupt latency.
推荐
Battery-Connected IoT Edge Nodes
The PIC32MX250F128BT-V/SO is well suited to battery-connected IoT edge nodes with its 0.5 mA/MHz active current, multiple low-power sleep modes, 32 KB SRAM for queued sensor samples, and 128 KB Flash storing TLS or LoRaWAN stacks. The 10-bit ADC plus PMP handle local pre-processing before wake-and-transmit, and the -40C to +105C grade supports outdoor enclosures.
推荐
推荐产品汇总
工程参考数据： PIC32MX250F128BT-V/SO ——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 | PIC32MX250F128BT-I/SO | PIC32MX250F128B-I/SO | PIC32MX150F128BT-V/SO | PIC32MX220F032BT-I/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (SO) | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same | 28-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 128 KB | 128 KB | 128 KB | 128 KB | 32 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 8 KB |
| Maximum CPU Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Temperature Range | -40 C to +105 C | -40 C to +105 C | -40 C to +85 C | -40 C to +105 C | -40 C to +85 C |
| Parallel Master Port (PMP) | Yes | Yes | Yes | No | Yes |
| Packaging Form | Tape & Reel (T suffix) | Tube (no T suffix) | Tube | Tape & Reel | Tube |
关键差异点
- Extended -40C to +105C temperature grade for harsh environments （对比 PIC32MX250F128B-I/SO)
- PMP graphic interface retained versus PIC32MX150 family （对比 PIC32MX150F128BT-V/SO)
- Eight times more Flash than the entry-level PIC32MX220 （对比 PIC32MX220F032BT-I/SO)
设计说明
Decouple VDD with a 10 uF bulk capacitor plus a 0.1 uF ceramic placed within 5 mm of each VDD/VSS pair, per the PIC32MX250 family datasheet. The internal PLL draws brief high-current pulses during frequency lock; insufficient decoupling causes core resets or analog ADC noise. Place a ferrite bead between the digital 3.3 V rail and the AVDD pin if the application uses the ADC at high sample rates.
Route the 40 MHz crystal traces on the top layer with short, symmetric traces and a guard ring tied to ground. Keep the OSCI/OSCO traces away from PWM or switching signals to avoid clock jitter. Place the crystal within 5 mm of the MCU. The 28-SOIC land pattern is generous, so pour copper on all spare area to improve heat spreading but stitch the pour with vias around the crystal traces.
The MCLR pin must be pulled high through a 10 kohm resistor and a 10 nF capacitor to ground for proper reset behavior. Floating MCLR is a common cause of intermittent start-up failures. Also configure unused I/O pins as outputs driven low, not as inputs, to avoid floating-pin current leakage that can exceed the datasheet sleep current by orders of magnitude.
合规信息
RoHS and REACH compliance per Microchip product declaration. Lead-free and halogen-free per the datasheet materials statement. AEC-Q100 not applicable for this general-market grade.
