PIC32MX250F256L-50I/PT - 50MHz 256KB Flash 32-bit MCU | Microchip
MPN: PIC32MX250F256L-50I/PT ✓ Hoạt độngPIC32MX250F256L-50I/PT Tóm tắt
A 32-bit microcontroller (MCU) is a microprocessor core with on-chip Flash program memory, SRAM data memory, and integrated peripherals such as timers, ADC, communication controllers, and I/O. Within the system hierarchy, an MCU sits at the top of the embedded control stack: MCU -> microcontroller -> embedded processor -> semiconductor. The PIC32MX family uses the MIPS32 M4K Harvard architecture, which separates instruction and data paths and provides single-cycle multiply, hardware divide, and a deterministic interrupt response tailored to real-time embedded control.
Key differentiating features include a USB 2.0-compliant Full-Speed On-The-Go (OTG) controller, four SPI/I2S modules for codec and serial communication, a Parallel Master Port (PMP) with dual buffers for graphics interfaces, two I2C modules, and a 10-bit 1 Msps ADC with up to 28 channels. The PPS function allows digital peripheral pin assignments to be remapped in software, decoupling peripheral selection from physical pinout and simplifying PCB layout.
Architecturally, the PIC32MX250 family is built on a 5-stage pipeline MIPS32 M4K core and integrates a dedicated DMA controller, a crypto engine, and a CTMU for capacitive touch sensing. The 256 KB Flash is arranged as 256K x 8, supporting self-programming under firmware control and IEC 60730 Class B support via the Flash Error Correction Code (ECC) and supporting libraries.
Typical applications include USB peripherals and embedded hosts (HID, CDC, mass storage), audio playback with I2S DACs, low-cost graphical HMI with PMP-driven LCDs, capacitive-touch user interfaces, and industrial control nodes. The combination of USB OTG, large SRAM, and PPS makes the PIC32MX250F256L-50I/PT a flexible general-purpose 32-bit platform for both consumer and industrial designs.
Design tip: place 0.1 µF decoupling capacitors as close as possible to every VDD/VSS pin pair and add a bulk 10 µF tantalum or ceramic capacitor near the IC. For USB designs, the 90 Ω differential D+/D- trace impedance must be controlled and the VBUS line should include ESD protection rated at IEC 61000-4-2 Level 4.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes beyond what the manufacturer datasheet provides, giving engineers a single reference for sourcing and design-in.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX250F256L-50I/PT — 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 PIC32MX250F256L-50I/PT (cùng hình factor và footprint) — khác nhau ở ADC, Package, Core Architecture, USB, SRAM.
PIC32MX250F256HT-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX250F256L-50I/PF
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX250F256H-50I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX230F256D-50I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX170F512L-50I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX274F256D-I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX250F256L-50I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K 32-bit |
| Maximum CPU Speed | 50 MHz / 83 DMIPS |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Hộp | 100-pin TQFP (PT) 12x12 mm |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Number of I/O Pins | 81 |
| USB | USB 2.0 Full-Speed OTG |
| ADC | 10-bit, up to 1 Msps |
| SPI / I2S Modules | 4 (SPI/I2S configurable) |
| I2C Modules | 2 |
| Parallel Master Port (PMP) | Yes, with dual buffers |
| DMA Channels | 4 (with FIFOs) |
| Peripheral Pin Select (PPS) | Yes |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Cấp MSL | 3 (168 hours) |
Cấu hình chân PIC32MX250F256L-50I/PT
| Chân 1 | RG15 — General purpose I/O / SDA2 (PPS) |
| Chân 2 | VDD — Positive supply (2.3 V to 3.6 V) |
| Chân 3 | RP10/RD0 — Remappable peripheral I/O |
| Chân 4 | RP11/RD1 — Remappable peripheral I/O |
| Chân 5 | RP4/PMD4/RD2 — Remappable peripheral I/O / PMP data |
| Chân 6 | RP5/PMD5/RD3 — Remappable peripheral I/O / PMP data |
| Chân 7 | VDD — Positive supply |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RP6/PMD6/RD4 — Remappable peripheral I/O / PMP data |
| Chân 10 | RP7/PMD7/RD5 — Remappable peripheral I/O / PMP data |
| Chân 11 | RP8/PMD8/RD6 — Remappable peripheral I/O / PMP data |
| Chân 12 | RP9/PMD9/RD7 — Remappable peripheral I/O / PMP data |
| Chân 13 | VSS — Ground reference |
| Chân 14 | PGEC2 — ICSP clock / debugging |
| Chân 15 | PGED2 — ICSP data / debugging |
| Chân 16 | RG6 — General purpose I/O |
| Chân 17 | RG7 — General purpose I/O |
| Chân 18 | RG8 — General purpose I/O |
| Chân 19 | RG9 — General purpose I/O |
| Chân 20 | VSS — Ground reference |
| Chân 21 | RG0 — General purpose I/O |
| Chân 22 | RG1 — General purpose I/O |
| Chân 23 | VUSB — USB internal 3.3 V regulator output (decouple 1uF) |
| Chân 24 | D+ — USB D+ data line |
| Chân 25 | D- — USB D- data line |
| Chân 26 | VSS — Ground reference |
| Chân 27 | PGEC3 — ICSP clock / debugging (alternate) |
| Chân 28 | PGED3 — ICSP data / debugging (alternate) |
| Chân 29 | RF0 — General purpose I/O |
| Chân 30 | RF1 — General purpose I/O |
| Chân 31 | RF2 — General purpose I/O |
| Chân 32 | RF3 — General purpose I/O |
| Chân 33 | RF4 — General purpose I/O |
| Chân 34 | RF5 — General purpose I/O |
| Chân 35 | VSS — Ground reference |
| Chân 36 | RF6 — General purpose I/O |
| Chân 37 | RF7 — General purpose I/O |
| Chân 38 | RF8 — General purpose I/O |
| Chân 39 | VSS — Ground reference |
| Chân 40 | OSC1/CLKI/RC13 — Crystal oscillator input or external clock input |
| Chân 41 | OSC2/CLKO/RC14 — Crystal oscillator output or clock output |
| Chân 42 | SOSCI/RPC13/RC13 — Secondary oscillator input |
| Chân 43 | SOSCO/RPC14/RC14 — Secondary oscillator output |
| Chân 44 | VDD — Positive supply |
| Chân 45 | RA0 — General purpose I/O / analog input AN0 |
| Chân 46 | RA1 — General purpose I/O / analog input AN1 |
| Chân 47 | RA2 — General purpose I/O / analog input AN2 |
| Chân 48 | RA3 — General purpose I/O / analog input AN3 |
| Chân 49 | RA4 — General purpose I/O / analog input AN4 |
| Chân 50 | RA5 — General purpose I/O / analog input AN5 |
| Chân 51 | RA6 — General purpose I/O / analog input AN6 |
| Chân 52 | RA7 — General purpose I/O / analog input AN7 |
| Chân 53 | VSS — Ground reference |
| Chân 54 | RB0 — General purpose I/O / AN8 / PGED1 |
| Chân 55 | RB1 — General purpose I/O / AN9 / PGEC1 |
| Chân 56 | RB2 — General purpose I/O / AN10 / CVREF+ |
| Chân 57 | RB3 — General purpose I/O / AN11 / CVREF- |
| Chân 58 | RB4 — General purpose I/O / AN12 |
| Chân 59 | RB5 — General purpose I/O / AN13 |
| Chân 60 | RB6 — General purpose I/O / AN14 |
| Chân 61 | RB7 — General purpose I/O / AN15 |
| Chân 62 | RB8 — General purpose I/O / AN16 |
| Chân 63 | RB9 — General purpose I/O / AN17 |
| Chân 64 | RB10 — General purpose I/O / AN18 |
| Chân 65 | RB11 — General purpose I/O / AN19 |
| Chân 66 | VSS — Ground reference |
| Chân 67 | RB12 — General purpose I/O / AN20 |
| Chân 68 | RB13 — General purpose I/O / AN21 |
| Chân 69 | RB14 — General purpose I/O / AN22 |
| Chân 70 | RB15 — General purpose I/O / AN23 |
| Chân 71 | RC1 — General purpose I/O |
| Chân 72 | RC2 — General purpose I/O |
| Chân 73 | RC3 — General purpose I/O |
| Chân 74 | RC4 — General purpose I/O |
| Chân 75 | VDD — Positive supply |
| Chân 76 | RD8/RTCC/PMRD — Remappable / RTCC output / PMP read strobe |
| Chân 77 | RD9/PMWR — Remappable / PMP write strobe |
| Chân 78 | RD10/PMCS1 — Remappable / PMP chip select 1 |
| Chân 79 | RD11/PMCS2 — Remappable / PMP chip select 2 |
| Chân 80 | RD12 — General purpose I/O |
| Chân 81 | RD13 — General purpose I/O |
| Chân 82 | RD14 — General purpose I/O |
| Chân 83 | RD15 — General purpose I/O |
| Chân 84 | VSS — Ground reference |
| Chân 85 | RE0 — General purpose I/O / PMD0 |
| Chân 86 | RE1 — General purpose I/O / PMD1 |
| Chân 87 | RE2 — General purpose I/O / PMD2 |
| Chân 88 | RE3 — General purpose I/O / PMD3 |
| Chân 89 | RE4 — General purpose I/O / PMD4 (alt) |
| Chân 90 | RE5 — General purpose I/O / PMD5 (alt) |
| Chân 91 | RE6 — General purpose I/O / PMD6 (alt) |
| Chân 92 | RE7 — General purpose I/O / PMD7 (alt) |
| Chân 93 | RG2 — General purpose I/O |
| Chân 94 | RG3 — General purpose I/O |
| Chân 95 | MCLR — Master Clear (reset) input |
| Chân 96 | RG12 — General purpose I/O |
| Chân 97 | RG13 — General purpose I/O |
| Chân 98 | RG14 — General purpose I/O |
| Chân 99 | VDD — Positive supply |
| Chân 100 | RG15 — General purpose I/O (alt location) |
Ứng dụng tiêu biểu
PIC32MX250F256L-50I/PT phù hợp cho 6 Áp dụngs: USB Audio Class (UAC) DAC Peripheral, Graphical HMI with Parallel LCD, Industrial Sensor Hub with USB Diagnostics, Capacitive Touch Control Panel, Portable Data Logger with USB Mass Storage, Embedded Web Server (Lightweight HTTP).
USB Audio Class (UAC) DAC Peripheral
The PIC32MX250F256L-50I/PT is well matched to USB audio class peripherals because it combines an on-chip USB 2.0 Full-Speed OTG controller, four I2S-capable SPI modules for connecting external DACs, and 32 KB SRAM for sample buffering at 48 kHz/16-bit stereo. The PIC32MX250F256L-50I/PT can sustain 50 MHz core operation while servicing the USB interrupt, leaving cycles for audio rendering. The on-chip DMA controller moves samples between the USB endpoint FIFO and the I2S transmit buffer without CPU intervention. Recommended companion: AKM AK4452 I2S DAC and TI TPS2051B USB power switch.
Được đề xuất
Graphical HMI with Parallel LCD
The Parallel Master Port (PMP) on the PIC32MX250F256L-50I/PT supports 8-bit and 16-bit data widths with dual read/write buffers, enabling the PIC32MX250F256L-50I/PT to drive small QVGA (320x240) TFT LCDs without an external controller. With 256 KB Flash, full-frame graphical firmware libraries fit on-chip, and the 81 I/O pins provide ample signal lines for touch, backlight, and SD card interfaces. The 50 MHz core refreshes the display from internal SRAM without DMA bottlenecks.
Được đề xuất
Industrial Sensor Hub with USB Diagnostics
For industrial sensor aggregation, the PIC32MX250F256L-50I/PT provides two I2C buses, four SPI ports, and a 10-bit 1 Msps ADC with up to 28 input channels. Engineers use the USB OTG controller as a service port for diagnostics and firmware update, while the 32 KB SRAM buffers sensor frames before uploading to a host. The -40C to +85C industrial temperature range covers most factory-floor enclosures without derating.
Được đề xuất
Capacitive Touch Control Panel
The PIC32MX250F256L-50I/PT integrates the Charge Time Measurement Unit (CTMU), which combined with the on-chip 10-bit ADC and PPS-mappable I/O enables up to 16 capacitive touch buttons or a 4x4 matrix. Designers use the PPS function to route CTMU channels to any spare I/O pin, simplifying PCB layout for irregular-shaped touch pads. The 256 KB Flash accommodates Microchip's mTouch library plus a custom UI state machine.
Được đề xuất
Portable Data Logger with USB Mass Storage
Battery-powered data loggers benefit from the PIC32MX250F256L-50I/PT because it runs from a single Li-Ion cell (2.3 V to 3.6 V), integrates USB Full-Speed for direct connection to a host PC, and provides 256 KB Flash plus 32 KB SRAM for circular log buffers. The PIC32MX250F256L-50I/PT implements USB Mass Storage Class using the on-chip Flash or an external SPI Flash as the backing store. Power-down current with the on-chip RTCC is microampere-class, extending battery life during idle logging intervals.
Được đề xuất
Embedded Web Server (Lightweight HTTP)
Although the PIC32MX250F256L-50I/PT lacks Ethernet, it can implement a lightweight HTTP service over USB RNDIS or an external SPI-based Wi-Fi module such as the MRF24WG0MA. The PIC32MX250F256L-50I/PT runs Microchip's TCP/IP stack (MLA) in 256 KB Flash, and the 81 I/O pins provide a generous connection count to controlled devices. For secure deployments, the on-chip crypto engine accelerates AES-128/256 blocks used by TLS handshake acceleration.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX250F256L-50I/PT — 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 | PIC32MX250F256HT-I/PT | PIC32MX250F256L-50I/PF | PIC32MX250F256H-50I/PT | PIC32MX230F256D-50I/PT | PIC32MX170F512L-50I/PT | PIC32MX274F256D-I/PT |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (PT) 12x12 mm | 100-pin TQFP (PT) 12x12 mm - same | 100-pin TFBGA (PF) - same die, different package | 100-pin TQFP (PT) 12x12 mm - same | 100-pin TQFP (PT) 12x12 mm - same | 100-pin TQFP (PT) 12x12 mm - same | 100-pin TQFP (PT) 12x12 mm - same |
| Core | MIPS32 M4K 32-bit | 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 Speed | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 40 MHz / 52 DMIPS | 50 MHz / 83 DMIPS | 72 MHz / 117 DMIPS |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 16 KB | 64 KB | 32 KB |
| USB OTG | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | No | Yes (Full-Speed) | No | Yes (Full-Speed) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +105C (AEC-Q100 Grade 2) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Approx. Unit Price (qty-1) | $9.20 (as of 2026-10-02) | Higher (extended temp) | Similar | Slightly lower (no USB) | Lower (less SRAM) | Higher (more Flash) | Slightly higher (newer family) |
Bảo phân biệt quan trọng
- Integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver (vsPIC32MX170F512L-50I/PT)
- 50 MHz / 83 DMIPS core speed for the same Flash/SRAM capacity (vsPIC32MX230F256D-50I/PT)
- Full Peripheral Pin Select (PPS) remapping on all digital peripherals (vsPIC32MX250F256H-50I/PT)
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor on every VDD/VSS pin pair as close to the package as physically possible (within 2 mm). Add a single 10 uF bulk ceramic or tantalum capacitor near the IC to handle transient load steps from the USB transceiver and ADC. The VUSB pin (pin 23) requires a 1 uF ceramic decoupling capacitor to ground per the Microchip PIC32MX2XX family datasheet, and this capacitor must be present even when USB is unused because the internal 3.3 V LDO remains active.
For USB designs, the D+ and D- traces must be routed as a 90 ohm differential pair with controlled impedance, using a continuous reference ground plane beneath. Length matching should hold within 150 mil between D+ and D- per the USB 2.0 specification. Place a common-mode choke or ferrite bead in series with VBUS if the design is susceptible to conducted EMI, and add ESD protection diodes (USBLC6-2SC6 or equivalent) rated at IEC 61000-4-2 Level 4 directly at the USB connector.
Use the Peripheral Pin Select (PPS) feature to remap digital peripherals (UART, SPI, I2C, timers) to any available I/O pin, but group high-speed SPI signals (SCK, MOSI, MISO) on adjacent pins to minimize loop area. Estimated: keep SCK trace length below 50 mm and route it on the top layer with a continuous ground plane on layer 2 to avoid EMI. Place the 8 MHz or 12 MHz crystal within 5 mm of the OSC1/OSC2 pins and guard the traces with a ground pour on both sides.
Do not skip the MCLR pull-up resistor; the MCLR pin (pin 95) requires a 10 kohm pull-up to VDD for reliable reset behavior, especially in noisy environments. Do not leave any VDD pin floating; the PIC32MX250F256L has multiple VDD pins (2, 7, 44, 75, 99) and all must be connected. Programming the device via ICSP requires both PGECx/PGEDx pairs to be accessible - if a pair is used exclusively for peripherals, keep the alternate pair (PGEC3/PGED3 on pins 27/28) free for in-circuit debugging.
When driving large parallel LCDs through the PMP, add 22 ohm series damping resistors on the PMD[15:0], PMRD, PMWR, and PMCS lines if the bus length exceeds 50 mm. The PMP can sustain up to 50 MHz operation but the actual throughput depends on the load capacitance of the LCD connector and cable. Estimated: total bus capacitance should be held below 50 pF to maintain 25 MHz PMP operation without bus errors.
Thông tin tuân thủ
Standard -50I part is industrial-grade (-40C to +85C). For AEC-Q100 qualified parts, choose the -HT variant. RoHS and REACH compliance per Microchip product declarations.