PIC32MX250F256LT-I/PF - 32-bit MCU 256KB Flash 100-TQFP
料号： PIC32MX250F256LT-I/PF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.05 | $6.05 |
| 10 | $5.44 | $54.40 |
| 100 | $4.84 | $484.00 |
| 500 | $4.36 | $2,180.00 |
| 1,000 | $3.88 | $3,880.00 |
PIC32MX250F256LT-I/PF 概述
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (Flash), working memory (SRAM), and integrated peripherals. The PIC32MX250 sits within the broader taxonomy of microcontroller -> 32-bit MCU -> MIPS-based MCU -> embedded controller -> semiconductor. It is designed for embedded applications that need more processing headroom than 8/16-bit MCUs but where a Linux-class application processor is overkill.
Key differentiating specifications include 256KB on-chip Flash (256K x 8 organization), 32KB SRAM, two I2S and four SPI modules for codec and serial communications, Peripheral Pin Select (PPS) for flexible pin mapping, a Parallel Master Port with dual buffers for graphics, and an integrated 10-bit ADC with CTMU for touch and capacitive sensing. The device supports 2.3V to 3.6V operation, and the -I suffix indicates an industrial temperature range of -40C to +85C.
The PIC32MX250 architecture uses a MIPS32 M4K Harvard core with separate instruction and data buses, hardware multiply/divide, and a 5-stage pipeline. The PPS subsystem allows most digital peripherals to be remapped to a wide choice of physical pins, simplifying PCB routing and enabling pin-compatible variants across different memory sizes without board redesign.
Typical applications include consumer audio (Bluetooth/I2S speakers), capacitive touch human-machine interfaces, low-cost graphics with PMP-driven TFT panels, USB device/host bridges, sensor hubs, and small industrial controllers. Its balance of Flash, RAM, and peripheral mix makes it well-suited to mid-volume connected products.
When designing with this part, plan the 40 MHz clock tree carefully, allocate PPS mappings before PCB layout, and ensure the 100-pin TQFP footprint is consistent with the -50I/PF or -50I/PT pin-compatible speed variants if headroom is needed.
This page synthesizes distributor pricing, drop-in alternatives drawn from Microchip's own PIC32MX2XX family, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： PIC32MX250F256LT-I/PF ——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： PIC32MX250F256LT-I/PF （相同外形与封装尺寸） ——差异在于 ADC, Package, Parallel Master Port (PMP), CTMU (Capacitive Touch), Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
PIC32MX250F256L-I/PF
✅ 直接替换✓ 有现货
$4.1 / 个
查看数据手册 →PIC32MX250F256L-50I/PF
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX270F256L-I/PF
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX170F512L-I/PF
✅ 直接替换✓ 有现货
$6.45 / 个
查看数据手册 →PIC32MX130F128L-I/PF
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX250F256LT-I/PF 最大额定值与电气特性
| Core Architecture | MIPS32 M4K |
| Core Type | PIC32MX 32-bit MCU |
| Maximum CPU Speed | 40 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| 工作温度范围 | -40 C to +85 C (Industrial, -I) |
| 封装 | 100-pin TQFP (14x14 mm), TQFP-100 |
| 安装类型 | Surface Mount |
| I2S Modules | 2 |
| SPI Modules | 4 |
| Parallel Master Port (PMP) | Yes, with dual read/write buffers |
| Peripheral Pin Select (PPS) | Yes |
| ADC | 10-bit (1 MSPS), 1 module |
| CTMU (Capacitive Touch) | Yes |
| DMIPS | Up to 83 DMIPS (at 50 MHz core speed, family max) |
| MSL 等级 | 3 (168 hours) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
PIC32MX250F256LT-I/PF 引脚配置
| 引脚 1 | RG15 — General purpose I/O / PPS-mappable |
| 引脚 2 | VDD — Supply voltage (2.3V to 3.6V) |
| 引脚 3 | RF0 — General purpose I/O / PPS-mappable |
| 引脚 4 | RF1 — General purpose I/O / PPS-mappable |
| 引脚 5 | RG6 — General purpose I/O / PPS-mappable |
| 引脚 6 | RG7 — General purpose I/O / PPS-mappable |
| 引脚 7 | RG8 — General purpose I/O / PPS-mappable |
| 引脚 8 | RG9 — General purpose I/O / PPS-mappable |
| 引脚 9 | VSS — Ground |
| 引脚 10 | VDD — Supply voltage |
| 引脚 11 | RB0 — PPS-mappable I/O / PGED1 |
| 引脚 12 | RB1 — PPS-mappable I/O / PGEC1 |
| 引脚 13 | RB2 — PPS-mappable I/O |
| 引脚 14 | RB3 — PPS-mappable I/O |
| 引脚 15 | RB4 — PPS-mappable I/O |
| 引脚 16 | RB5 — PPS-mappable I/O |
| 引脚 17 | RB6 — PPS-mappable I/O |
| 引脚 18 | RB7 — PPS-mappable I/O |
| 引脚 19 | RB8 — PPS-mappable I/O |
| 引脚 20 | RB9 — PPS-mappable I/O |
| 引脚 21 | RB10 — PPS-mappable I/O |
| 引脚 22 | RB11 — PPS-mappable I/O |
| 引脚 23 | RB12 — PPS-mappable I/O |
| 引脚 24 | RB13 — PPS-mappable I/O |
| 引脚 25 | RB14 — PPS-mappable I/O |
| 引脚 26 | RB15 — PPS-mappable I/O |
| 引脚 27 | VSS — Ground |
| 引脚 28 | VDD — Supply voltage |
| 引脚 29 | RC12 — PPS-mappable I/O |
| 引脚 30 | RC13 — PPS-mappable I/O |
| 引脚 31 | RC14 — PPS-mappable I/O |
| 引脚 32 | RC15 — PPS-mappable I/O |
| 引脚 33 | VSS — Ground |
| 引脚 34 | RD0 — PPS-mappable I/O |
| 引脚 35 | RD1 — PPS-mappable I/O |
| 引脚 36 | RD2 — PPS-mappable I/O |
| 引脚 37 | RD3 — PPS-mappable I/O |
| 引脚 38 | RD4 — PPS-mappable I/O |
| 引脚 39 | RD5 — PPS-mappable I/O |
| 引脚 40 | RD6 — PPS-mappable I/O |
| 引脚 41 | RD7 — PPS-mappable I/O |
| 引脚 42 | RD8 — PPS-mappable I/O |
| 引脚 43 | RD9 — PPS-mappable I/O |
| 引脚 44 | RD10 — PPS-mappable I/O |
| 引脚 45 | RD11 — PPS-mappable I/O |
| 引脚 46 | VSS — Ground |
| 引脚 47 | VDD — Supply voltage |
| 引脚 48 | RD12 — PPS-mappable I/O |
| 引脚 49 | RD13 — PPS-mappable I/O |
| 引脚 50 | RD14 — PPS-mappable I/O |
| 引脚 51 | RD15 — PPS-mappable I/O |
| 引脚 52 | RE0 — PPS-mappable I/O |
| 引脚 53 | RE1 — PPS-mappable I/O |
| 引脚 54 | RE2 — PPS-mappable I/O |
| 引脚 55 | RE3 — PPS-mappable I/O |
| 引脚 56 | RE4 — PPS-mappable I/O |
| 引脚 57 | RE5 — PPS-mappable I/O |
| 引脚 58 | RE6 — PPS-mappable I/O |
| 引脚 59 | RE7 — PPS-mappable I/O |
| 引脚 60 | RG0 — PPS-mappable I/O |
| 引脚 61 | RG1 — PPS-mappable I/O |
| 引脚 62 | RG2 — PPS-mappable I/O |
| 引脚 63 | RG3 — PPS-mappable I/O |
| 引脚 64 | VSS — Ground |
| 引脚 65 | VDD — Supply voltage |
| 引脚 66 | RF13 — PPS-mappable I/O |
| 引脚 67 | RF12 — PPS-mappable I/O |
| 引脚 68 | RF5 — PPS-mappable I/O |
| 引脚 69 | RF4 — PPS-mappable I/O |
| 引脚 70 | RF3 — PPS-mappable I/O |
| 引脚 71 | RF2 — PPS-mappable I/O |
| 引脚 72 | RC1 — PPS-mappable I/O |
| 引脚 73 | RC2 — PPS-mappable I/O |
| 引脚 74 | RC3 — PPS-mappable I/O |
| 引脚 75 | RC4 — PPS-mappable I/O |
| 引脚 76 | VSS — Ground |
| 引脚 77 | RF8 — PPS-mappable I/O |
| 引脚 78 | VSS — Ground |
| 引脚 79 | RA0 — PPS-mappable I/O |
| 引脚 80 | RA1 — PPS-mappable I/O |
| 引脚 81 | RA2 — PPS-mappable I/O |
| 引脚 82 | RA3 — PPS-mappable I/O |
| 引脚 83 | RA4 — PPS-mappable I/O |
| 引脚 84 | RA5 — PPS-mappable I/O |
| 引脚 85 | RA6 — PPS-mappable I/O |
| 引脚 86 | RA7 — PPS-mappable I/O |
| 引脚 87 | RA8 — PPS-mappable I/O |
| 引脚 88 | RA9 — PPS-mappable I/O |
| 引脚 89 | RA10 — PPS-mappable I/O |
| 引脚 90 | RG14 — PPS-mappable I/O |
| 引脚 91 | RG12 — PPS-mappable I/O |
| 引脚 92 | RG13 — PPS-mappable I/O |
| 引脚 93 | VDD — Supply voltage |
| 引脚 94 | VSS — Ground |
| 引脚 95 | RF6 — PPS-mappable I/O |
| 引脚 96 | RF7 — PPS-mappable I/O |
| 引脚 97 | RG1 — PPS-mappable I/O |
| 引脚 98 | RG0 — PPS-mappable I/O |
| 引脚 99 | RG15 — PPS-mappable I/O |
| 引脚 100 | VSS — Ground |
典型应用
PIC32MX250F256LT-I/PF 适用于 6 应用s: Consumer Audio (I2S Speakers / Headphones), Capacitive Touch HMI (Kitchen Appliances, Industrial Panels), Small TFT Graphical Display (PMP-Driven Panels), USB Device/Host Bridge (Custom HID / Mass Storage), IoT Sensor Hub and Edge Node, Industrial Control (Motor / Valve / Sensor Aggregation).
Consumer Audio (I2S Speakers / Headphones)
The PIC32MX250F256LT-I/PF fits consumer audio because it integrates two I2S modules and four SPI ports for the audio codec plus Bluetooth transport, and the MIPS M4K core at 40 MHz (66 DMIPS) has the headroom to decode MP3/AAC streams. The 32 KB SRAM accommodates compressed audio buffers while the 256 KB Flash holds firmware plus decoder tables. Placed as the central controller between the Bluetooth module, audio DAC, and user input, it eliminates the need for a separate DSP. Trade-off vs an STM32F4: lower raw MIPS but more flexible PPS routing in the 100-pin TQFP.
推荐
Capacitive Touch HMI (Kitchen Appliances, Industrial Panels)
The PIC32MX250F256LT-I/PF supports capacitive touch through its integrated CTMU and 10-bit 1 MSPS ADC, with Microchip mTouch libraries validated on the PIC32MX2XX family. The 100-pin TQFP exposes up to 83 I/O pins, easily accommodating 20+ touch electrodes, slider strips, and proximity sensors. Placed at the front-panel MCU, the device drives both the touch scanning loop and the appliance control logic; the 32 KB SRAM handles touch baseline history. Unlike dedicated touch ICs, it shares scan, comms, and UI rendering on one die, lowering BOM and firmware complexity.
推荐
Small TFT Graphical Display (PMP-Driven Panels)
The PIC32MX250F256LT-I/PF drives small TFT panels through its Parallel Master Port with dual read/write buffers, offloading pixel transfer via DMA and freeing the M4K core for UI logic. At 40 MHz and 32 KB SRAM it handles QVGA-class panels with partial frame buffers; the 100-pin TQFP (PF) exposes the full PMP bus plus remaining GPIO for backlight and touch. Placed between the panel FPC and the rest of the system, it acts as a dedicated graphics co-processor; a higher-speed PIC32MX250F256L-50I/PF gives extra headroom for animations.
推荐
USB Device/Host Bridge (Custom HID / Mass Storage)
Although the PIC32MX250F256LT-I/PF itself does not contain a USB PHY, its PPS subsystem and 83 I/O pins make it well-suited as the bridge controller on a board where USB signaling is handled by an external PHY such as the PIC32MX USB-capable siblings. The 256 KB Flash holds USB stack and class drivers, while 32 KB SRAM is ample for HID reports and bulk transfer buffers. As a bridge, it converts a parallel sensor data stream into USB HID or bulk transfers. The 40 MHz grade is sufficient for USB Full Speed (12 Mbps) protocol overhead and command parsing.
推荐
IoT Sensor Hub and Edge Node
The PIC32MX250F256LT-I/PF acts as a low-cost IoT edge node, fanning in UART, SPI, and I2C sensors through PPS-mapped pins and publishing over UART to a Wi-Fi/BLE module. With 256 KB Flash it accommodates TLS libraries or vendor stacks, and 32 KB SRAM is adequate for sensor frame buffering. At 2.3V to 3.6V it can be battery-powered with a switching regulator; the industrial -40C to +85C temperature range suits outdoor enclosures. Trade-off versus an ESP32: more deterministic real-time, lower power in deep-sleep via software MCU, but more external BOM.
推荐
Industrial Control (Motor / Valve / Sensor Aggregation)
The PIC32MX250F256LT-I/PF fits small industrial controllers where deterministic response matters: the MIPS M4K core runs a real-time scheduler, the PMP and PPS simplify multi-axis sensor aggregation, and the CTMU handles analog front-end conditioning. The industrial -40C to +85C grade tolerates cabinet environments, and the 100-pin TQFP eases layout for opto-isolated I/O groups. Placed at the heart of a small controller, it reads inputs, drives outputs, and reports over UART/CAN/Modbus via SPI-to-transceiver. The 40 MHz grade is sufficient when PID loops are modest and software is C-based.
推荐
推荐产品汇总
工程参考数据： PIC32MX250F256LT-I/PF ——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 | PIC32MX250F256L-I/PF | PIC32MX250F256L-50I/PF | PIC32MX270F256L-I/PF | PIC32MX170F512L-I/PF | PIC32MX130F128L-I/PF |
|---|---|---|---|---|---|---|
| Package | TQFP-100 (PF, 14x14 mm) | TQFP-100 (PF, 14x14 mm) - same | TQFP-100 (PF, 14x14 mm) - same | TQFP-100 (PF, 14x14 mm) - same | TQFP-100 (PF, 14x14 mm) - same | TQFP-100 (PF, 14x14 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum CPU Speed | 40 MHz | 40 MHz | 50 MHz (+25%) | 50 MHz (+25%) | 50 MHz (+25%) | 50 MHz (+25%) |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB (+100%) | 128 KB (-50%) |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| 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 |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| USB Controller | None (USB via external PHY or sibling) | None | None | USB-OTG on-die | None | None |
关键差异点
- Highest pin count in the family exposes full PMP and Trace （对比 PIC32MX230F256DT-I/PT (TQFP-64))
- Doubled Flash headroom without changing footprint （对比 PIC32MX130F128L-I/PF (128 KB))
- USB-OTG on-die available in sibling at same footprint （对比 PIC32MX270F256L-I/PF)
设计说明
The PIC32MX250F256LT-I/PF operates from a single 2.3V to 3.6V supply; place a 10 uF bulk plus 100 nF decoupling at every VDD/VSS pair on the 100-pin TQFP. Core current at 40 MHz is moderate (estimated 60 to 80 mA active, ~10 uA sleep per the PIC32MX1XX/2XX/5XX family datasheet). For USB or sensor rails, route analog AV+/AV- separately. Do not let the supply fall below 2.3V during Flash programming or the device will abort the write and may flag an ECC error.
Use a 4-layer PCB with continuous ground plane under the 100-pin TQFP and keep traces to the 8 MHz primary oscillator under 10 mm. PPS allows remapping most digital peripherals, but analog inputs (ANx) and the PMP bus are pin-fixed, so plan those routes first. Decoupling capacitors must be placed as close as possible to each VDD pin; the TQFP-100 has 6 VDD pins and 6 VSS pins distributed across all four sides.
Estimated: at 40 MHz peripheral bus (PBCLK = SYSCLK/1 default), high-speed SPI peripherals can exceed 40 MHz when configured carelessly - cap PBCLK per the family datasheet. The CTMU requires calibration via the CTMUCON register before touch scanning; skip this and touch readings drift. Finally, do not drive PMP data lines above VDD, as the parallel port has no 5V tolerance.
The 100-pin TQFP exposes JTAG (PGEC1/PGED1) and optionally Trace (TRCLK/TRD0-TRD3) on dedicated pins; keep these traces short and series-terminated if the cable to the programmer is longer than 100 mm. When using I2S to drive an external DAC, the MCLK output can be a source of spurs on the audio band - route I2S lines over an unbroken ground reference and isolate them from switching power traces.
合规信息
RoHS compliant per Microchip product page. Not AEC-Q100 qualified - the PIC32MX family targets industrial/commercial not automotive. Halogen-free status not stated in retrieved data.
