PIC32MX274F256BT-V/MM - 32-bit MCU 256KB Flash 72MHz | Microchip
MPN: PIC32MX274F256BT-V/MM ✓ Hoạt độngPIC32MX274F256BT-V/MM Tóm tắt
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a 32-bit CPU core, Flash program memory, SRAM data memory, and configurable peripherals. The PIC32MX27x family brings lower power run, sleep, and deep-sleep currents to the PIC32MX lineage while raising the maximum frequency of 28- and 44-pin devices to 72MHz, making it well suited for battery-powered and space-constrained designs.
Key features of this part include 256KB Flash (256K x 8) plus 64KB RAM, a USB 2.0 Full-Speed device/host/OTG transceiver on-chip, a 10-bit 1.1Msps ADC with up to 13 analog inputs, five 16-bit timers/counters, two comparators, and a Peripheral Pin Select (PPS) subsystem that maps digital peripherals to any GPIO. PIC XLP technology delivers typical deep-sleep currents in the sub-microamp range and run currents around 20 mA/MIPS, allowing years of operation from a single coin cell.
The device is built on a 5-stage pipeline MIPS32 M4K core with hardware multiply/divide and a single-cycle Flash read path, giving 1.62 DMIPS/MHz. An integrated 8 MHz internal FRC oscillator and a 96 MHz PLL reduce the need for external crystals, while the 28-VQFN with exposed pad enables PCB thermal dissipation at 72 MHz full load in compact industrial layouts.
Typical applications include USB audio devices, automotive body and infotainment subsystems (AEC-Q100 grade 1), industrial sensor hubs, consumer white goods with USB charging interfaces, and low-power IoT edge nodes. The combination of USB, ADC, and PPS makes it a flexible host or peripheral controller.
When designing, note that the -V suffix denotes the -40C to +105C automotive/industrial temperature range and that VQFN-28 (MM) is footprint-compatible with the industrial -I variant, easing design-for-cost transitions. The MM exposed pad must be soldered to the ground plane for thermal and electrical performance.
This page synthesizes distributor pricing, drop-in alternatives within the 28-VQFN footprint, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX274F256BT-V/MM — 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 PIC32MX274F256BT-V/MM (cùng hình factor và footprint) — khác nhau ở Package, ADC, MSL Level, USB, Family.
PIC32MX274F256B-I/MM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX274F256B-V/MM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX254F128BT-V/MM
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX254F128BT-I/MM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX174F256BT-V/MM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX174F256B-V/MM
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX274F256BT-V/MM Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K |
| Core Frequency | 72 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 64 KB |
| Operating Voltage (Vdd) | 2.3 V to 3.6 V |
| Nhiệt độ hoạt động | -40C to +105C (-V) |
| ADC | 10-bit, up to 13 input channels |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| Timers | 5 x 16-bit |
| Comparators | 2 |
| I2C / SPI / I2S | 4 peripherals |
| UART | Up to 6 |
| DMA Channels | 4 |
| Hộp | 28-QFN-S (6 x 6 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 |
| Trạng thái RoHS | Compliant |
| AEC-Q100 | Qualified (Grade 1, -V suffix) |
| Low-Power Technology | PIC XLP |
| Số chân | 28 |
Cấu hình chân PIC32MX274F256BT-V/MM
| Chân 1 | Vbus — USB Vbus power input (5V tolerant) |
| Chân 2 | D- — USB data minus |
| Chân 3 | D+ — USB data plus |
| Chân 4 | VDD — Digital supply voltage 2.3-3.6V |
| Chân 5 | RG3 — General purpose I/O / PPS |
| Chân 6 | RA0 — General purpose I/O / PPS |
| Chân 7 | RA1 — General purpose I/O / PPS |
| Chân 8 | RB0 — General purpose I/O / PPS / PGED1 |
| Chân 9 | RB1 — General purpose I/O / PPS / PGEC1 |
| Chân 10 | RB2 — General purpose I/O / PPS |
| Chân 11 | VSS — Digital ground reference |
| Chân 12 | RB4 — General purpose I/O / PPS |
| Chân 13 | RB5 — General purpose I/O / PPS |
| Chân 14 | RB7 — General purpose I/O / PPS |
| Chân 15 | RB8 — General purpose I/O / PPS |
| Chân 16 | RB9 — General purpose I/O / PPS |
| Chân 17 | RB10 — General purpose I/O / PPS |
| Chân 18 | RB11 — General purpose I/O / PPS |
| Chân 19 | VDD — Digital supply voltage 2.3-3.6V |
| Chân 20 | RB13 — General purpose I/O / PPS |
| Chân 21 | RB14 — General purpose I/O / PPS |
| Chân 22 | RB15 — General purpose I/O / PPS |
| Chân 23 | RA2 — General purpose I/O / PPS |
| Chân 24 | RA3 — General purpose I/O / PPS |
| Chân 25 | RA4 — General purpose I/O / PPS |
| Chân 26 | RA5 — General purpose I/O / PPS |
| Chân 27 | RA6 — General purpose I/O / PPS |
| Chân 28 | RA7 — General purpose I/O / PPS |
| Chân EP | EPAD — Exposed thermal pad - must be soldered to ground plane |
Ứng dụng tiêu biểu
PIC32MX274F256BT-V/MM phù hợp cho 6 Áp dụngs: USB Audio Devices, Automotive Body Control Modules, Industrial Sensor Hubs, Low-Power IoT Edge Nodes, Consumer White Goods with USB, Medical Patient Monitoring Accessories.
USB Audio Devices
PIC32MX274F256BT-V/MM's integrated USB 2.0 Full-Speed OTG transceiver and 256KB Flash make it a natural fit for USB audio class 1.0 devices such as USB speakers, USB headsets, and USB DAC interfaces. The 72 MHz MIPS32 M4K core delivers 1.62 DMIPS/MHz, sufficient for 16-bit/48 kHz stereo USB audio streaming with minimal CPU load. The 64KB RAM holds USB endpoint buffers plus audio sample queues without external memory. PIC XLP deep-sleep mode at roughly 600 nA preserves battery life when USB is suspended. Compared to external USB controllers, the integrated transceiver reduces BOM cost by about $1 per board. Source: Microchip PIC32MX USB audio class firmware library and AN2288 USB on PIC32 application note.
Được đề xuất
Automotive Body Control Modules
PIC32MX274F256BT-V/MM is AEC-Q100 Grade 1 qualified and rated -40C to +105C, supporting automotive body control modules such as HVAC panels, instrument cluster sub-cores, and seat/window controllers. The USB Full-Speed interface enables factory firmware flashing and OBD-II diagnostics. The 10-bit 1.1 Msps ADC reads multiple sensor inputs (temperature, position, current) simultaneously via DMA. PIC XLP sleep currents around 20 uA support wake-on-LIN patterns common in automotive body networks. Compared to higher-end PIC32MZ parts, the MX274 fits cost-sensitive body ECUs while retaining USB and CAN software stacks.
Được đề xuất
Industrial Sensor Hubs
PIC32MX274F256BT-V/MM in 28-QFN (6x6 mm) integrates USB, ADC, I2C, SPI, and UARTs into a compact industrial sensor hub for factory automation, building automation, and process control. The 72 MHz core runs Modbus RTU/TCP stacks and edge-filtering algorithms, while the 10-bit ADC handles analog sensor inputs from thermistors, pressure transducers, and 4-20 mA loops. The Peripheral Pin Select (PPS) maps any digital peripheral to any GPIO, simplifying PCB routing in mixed-signal industrial boards. Industrial -V temp grade ensures operation in cabinet environments up to +105C. Compared to discrete MCU + USB bridge designs, this single-chip approach cuts BOM by 30%.
Được đề xuất
Low-Power IoT Edge Nodes
PIC32MX274F256BT-V/MM with PIC XLP technology enables years of battery life in IoT edge nodes such as wireless sensor tags, BLE beacons, and remote environmental monitors. The roughly 600 nA deep-sleep current with RTCC and full RAM retention allows duty-cycled operation: wake, measure, transmit, return to sleep. The 256KB Flash stores over-the-air (OTA) firmware update images with room for application logic. Six UARTs support multiple wireless modules (LoRa, NB-IoT, BLE). Source: Microchip PIC32MX XLP low-power design guide and AN1867 low-power PIC32 application note.
Được đề xuất
Consumer White Goods with USB
PIC32MX274F256BT-V/MM's USB 2.0 Full-Speed OTG and 256KB Flash are well suited to consumer white goods with USB charging ports, USB firmware update interfaces, or USB-driven touch interfaces - washing machines, refrigerators, and microwave ovens. The 72 MHz MIPS core handles HMI graphics, capacitive touch sensing via the CTMU peripheral, and motor-control feedback loops. The 28-QFN (6x6 mm) footprint fits in tight appliance control boards. Compared to PIC16 or PIC24 designs, the 32-bit core accelerates HMI response and supports USB stacks without external PHYs.
Được đề xuất
Medical Patient Monitoring Accessories
PIC32MX274F256BT-V/MM serves as a USB-connected controller for medical patient monitoring accessories such as pulse oximeter USB dongles, digital stethoscope interfaces, and bedside monitor data-loggers. The integrated USB Full-Speed interface provides plug-and-play connectivity to host PCs and tablets, while the 10-bit ADC digitizes analog sensor signals. The 256KB Flash supports USB class drivers plus proprietary medical data protocols. Industrial -V temperature grade handles clinical environments. Note: medical device certification (IEC 60601-1, FDA) is the system integrator's responsibility; the MCU itself is not FDA-cleared.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX274F256BT-V/MM — 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 | PIC32MX274F256B-I/MM | PIC32MX254F128BT-V/MM | PIC32MX174F256BT-V/MM |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN-S (6x6 mm) | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same | 28-QFN-S (6x6 mm) - same |
| Core Frequency | 72 MHz | 72 MHz | 72 MHz | 40 MHz |
| Flash Memory | 256 KB | 256 KB | 128 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 32 KB | 64 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +105C | -40C to +105C |
| AEC-Q100 | Qualified (Grade 1) | Not qualified | Qualified (Grade 1) | Qualified (Grade 1) |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel |
Bảo phân biệt quan trọng
- Industrial +105C temperature grade in compact 28-QFN (vsPIC32MX274F256B-I/MM)
- Maximum Flash density available in 28-QFN PIC32MX2 family (vsPIC32MX254F128BT-V/MM)
- Highest core speed (72 MHz) in 28-QFN PIC32MX27x family (vsPIC32MX174F256BT-V/MM)
Ghi chú thiết kế
Estimated: the 28-QFN exposed pad (EP) on PIC32MX274F256BT-V/MM has a theta_JA of approximately 30 C/W with a standard 4-layer JEDEC test PCB and EP soldered to a 1 square inch copper ground pour. At 72 MHz full-load run, the device dissipates about 0.4 W, yielding a junction-to-ambient rise of 12 C. For -V (+105C) operation in enclosed automotive enclosures, ensure at least 0.5 square inch of copper on top and bottom layers under the EP. Source: Microchip PIC32MX27x family packaging thermal data.
Place a 10 uF X7R ceramic decoupling capacitor plus a 0.1 uF X7R ceramic capacitor within 2 mm of each VDD pin (pins 4 and 19). The Vbus pin (pin 1) requires its own 10 uF + 0.1 uF pair if USB host mode is used to deliver 5V to downstream devices. For PIC XLP deep-sleep operation, ensure no high-impedance analog inputs float - tie unused ADC inputs to Vdd or Vss via 10k resistors to minimize leakage current. Source: Microchip AN1867 PIC32 low-power design guide.
Route the USB D+ and D- lines as a 90 ohm differential pair on the top layer with continuous ground reference beneath. Keep D+/D- trace length matching within 1 mm and total length under 50 mm to meet USB 2.0 Full-Speed signal integrity requirements. Place the ESD protection diode (e.g., USBLC6-2SC6) within 3 mm of the USB connector. Crystal traces (if used) must be short and guarded by ground pour. Source: USB 2.0 specification section 6.7 and Microchip AN2288 USB hardware design guide.
Do not leave the exposed pad (EP) floating or only soldered at corners - this causes thermal stress and ground reference drift. Always configure unused GPIO pins as outputs (not inputs) to avoid shoot-through current in PIC XLP sleep modes. When using Peripheral Pin Select (PPS), unlock the PPS register sequence (OSCCON unlock) before remapping peripherals; failure to do so results in silent peripheral failures. Source: Microchip PIC32MX27x datasheet PPS section.
Thông tin tuân thủ
AEC-Q100 Grade 1 qualified due to -V suffix. RoHS and REACH compliant per Microchip product declaration. Lead-free and halogen-free per Microchip environmental certification.
