PIC32MX270F256BT-50I/SS - 50MHz 256KB Flash 32-bit MCU | Microchip
Teilenummer: PIC32MX270F256BT-50I/SS ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $7.92 | $7,92 |
| 10 | $7.13 | $71,30 |
| 100 | $6.34 | $634,00 |
| 500 | $5.71 | $2.855,00 |
| 1.000 | $5.07 | $5.070,00 |
PIC32MX270F256BT-50I/SS Übersicht
A 32-bit microcontroller (MCU) is a single-chip processor that integrates CPU core, program Flash, data SRAM, and a rich peripheral set. PIC32MX2xx parts sit in the entry-tier of the PIC32MX family (PIC32MX1xx/2xx), offering the MIPS M4K core with single-cycle hardware multiply, 5-stage pipeline, and Peripheral Pin Select (PPS) for flexible signal routing. Within the broader taxonomy, PIC32MX2xx are general-purpose microcontrollers > 32-bit RISC microcontrollers > MIPS-based microcontrollers > Microchip PIC32 family.
Key features include 0.5 mA/MHz typical core current, 19 general-purpose I/O, Parallel Master Port (PMP) for graphics, mTouch capacitive touch via CTMU, on-chip temperature sensor, plus 5x I2C, 6x UART, 2x SPI/I2S, and a full-speed USB 2.0 device/host/OTG controller. The 28-SSOP footprint is a workhorse surface-mount package in the SSOP family, balancing compactness and hand-solderability for prototypes and small-batch production.
The M4K core, M5 draft wait, the M4K core executes most instructions in a single system clock cycle and includes a hardware multiply/divide unit plus DSP-like MAC operations, giving 83 DMIPS at 50 MHz. PPS remaps digital functions to any of several I/O pins, simplifying PCB layout. The CTMU provides 1 ns time measurement resolution for capacitive touch buttons and sliders, and the 10-bit ADC supports up to 1 Msps with multiple internal trigger options. The microcontroller implements USB 2.0 full-speed with internal transceiver, eliminating external PHY cost.
Typical applications include USB HID peripherals (keyboards, mice, custom input controllers), small TFT display modules driven through PMP, audio playback devices using I2S to external DACs, capacitive touch user interfaces for appliances, and sensor hubs with USB-CDC virtual COM port output. The -50I temperature grade covers -40C to +85C industrial environments. The 'T' suffix denotes Tape & Reel packaging for SMT production lines.
Design consideration: the USB D+/D- lines require careful PCB routing as a 90 ohm differential; place the series 27-33 ohm source resistors close to the device. PPS reflow per OFP PPS reflow per OFP, ensure PPS-remapped peripheral functions respect the underlying peripheral's timing constraints and that no two peripherals share the same physical pin without explicit software re-mapping at runtime.
This page synthesizes Microchip datasheet DS60001168L data, distributor stock signals, drop-in same-family alternatives, and practical design notes to help engineers select, source, and lay out the PIC32MX270F256BT-50I/SS faster.
Drop-in-Alternativen für PIC32MX270F256BT-50I/SS – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC32MX270F256BT-50I/SS (gleiche Bauform und Footprint) – abweichend in ADC, Package, SRAM, USB, Core.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC32MX270F256B-50I/SS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX270F256BT-50I/SO
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PIC32MX270F256BT-50I/ML
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PIC32MX170F256B-50I/SS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX250F256H-50I/PT
✅ Drop-In✓ Auf Lager
$4.55 / Stück
Datenblatt ansehen →PIC32MX130F256B-I/SS
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$3.15 / Stück
Datenblatt ansehen →PIC32MX270F256BT-50I/SS Grenzwerte & elektrische Eigenschaften
| Core | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 50 MHz |
| Performance | 83 DMIPS |
| Program Flash | 256 KB (256K x 8) |
| SRAM | 64 KB (64K x 8) |
| Supply Voltage Range | 2.3 V to 3.6 V |
| Typical Active Current | 0.5 mA / MHz |
| Betriebstemperaturbereich | -40C to +85C (Industrial) |
| GPIO Count | 19 |
| ADC | 10-bit, multi-channel |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| SPI / I2S Modules | 2 |
| Parallel Master Port (PMP) | Yes |
| CTMU / mTouch | Yes (1 ns time measurement) |
| Peripheral Pin Select (PPS) | Yes |
| On-chip Temperature Sensor | Yes |
| Gehäuse | 28-SSOP (0.209 in / 5.30 mm body width) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Packaging | Tape & Reel (T suffix) |
PIC32MX270F256BT-50I/SS Pin-Konfiguration
| Pin 1 | MCLR — Master Clear (reset) input, active-low |
| Pin 2 | RA0 — GPIO / PPS-capable / AN0 / VREF+ |
| Pin 3 | RA1 — GPIO / PPS-capable / AN1 / VREF- |
| Pin 4 | PGED3/RB4 — GPIO / Programming data / AN4 |
| Pin 5 | PGEC3/RB5 — GPIO / Programming clock / AN5 |
| Pin 6 | VSS — Ground reference |
| Pin 7 | VDD — Positive supply (2.3 V to 3.6 V) |
| Pin 8 | RB6 — GPIO / PPS-capable |
| Pin 9 | RB7 — GPIO / PPS-capable |
| Pin 10 | RB8 — GPIO / PPS-capable |
| Pin 11 | RB9 — GPIO / PPS-capable |
| Pin 12 | RB10 — GPIO / PPS-capable |
| Pin 13 | RB11 — GPIO / PPS-capable |
| Pin 14 | RB12 — GPIO / PPS-capable |
| Pin 15 | RB13 — GPIO / PPS-capable |
| Pin 16 | RA2 — GPIO / PPS-capable / AN2 / VREF+3 |
| Pin 17 | RA3 — GPIO / PPS-capable / AN3 |
| Pin 18 | RA4 — GPIO / PPS-capable / AN4 / SOSCO |
| Pin 19 | RA5 — GPIO / PPS-capable / AN5 / SOSCI |
| Pin 20 | VSS — Ground reference |
| Pin 21 | VDD — Positive supply (2.3 V to 3.6 V) |
| Pin 22 | OSC1/RC12 — Crystal oscillator input / GPIO |
| Pin 23 | OSC2/RC13 — Crystal oscillator output / GPIO |
| Pin 24 | D+/RC5 — USB D+ data line |
| Pin 25 | D-/RC4 — USB D- data line |
| Pin 26 | VBUS — USB VBUS sense input |
| Pin 27 | AVSS — Analog ground |
| Pin 28 | AVDD — Analog positive supply (2.3 V to 3.6 V) |
Typische Anwendungen
PIC32MX270F256BT-50I/SS ist geeignet für 7 Anwendungs: USB HID Peripherals, Audio Playback Devices with USB Streaming, TFT Display Controllers with PMP, Capacitive Touch User Interfaces (mTouch), Industrial Sensor Hubs with USB CDC, Home Automation IoT Devices, USB-to-UART/I2C/SPI Bridge.
USB HID Peripherals
The PIC32MX270F256BT-50I/SS is well suited to USB keyboard, mouse, game controller, and custom HID peripherals because of its integrated USB 2.0 full-speed controller with on-chip transceiver and 50 MHz MIPS M4K core. The 256 KB Flash hosts a full USB stack plus HID report descriptor logic, while 64 KB SRAM comfortably holds ping-pong endpoint buffers plus application state. Designers place 27 ohm source terminations on D+/D- near the IC and route the pair as a 90 ohm differential. The device's USB suspend current of less than 1 mA enables bus-powered designs compliant with USB 2.0 power budgets. Compared to MCUs requiring external USB PHYs, this single-chip integration cuts part count by 2-3 and reduces PCB area by approximately 25%.
Empfohlen
Audio Playback Devices with USB Streaming
For USB audio streaming, the PIC32MX270F256BT-50I/SS uses its integrated USB controller plus two I2S/SPI interfaces to an external audio DAC. The 50 MHz MIPS M4K core sustains 48 kHz 16-bit audio over USB isochronous endpoint with two channels, leaving 19.3 DMIPS for application logic and user interface handling. The 64 KB SRAM provides adequate buffering for USB isochronous packets plus a small audio delay line if needed. The CTMU peripheral supports capacitive touch volume and track-skip controls without additional components. Compared to dedicated USB audio MCUs, this device costs 30% less while providing programmable flexibility for product differentiation.
Empfohlen
TFT Display Controllers with PMP
The PIC32MX270F256BT-50I/SS drives small TFT panels through its Parallel Master Port (PMP) at up to 25 MHz pixel clock, suitable for 320x240 QVGA or smaller displays. The 50 MHz core pumps pixels with DMA-free software loop or PMP DMA, and 64 KB SRAM accommodates a small graphics framebuffer for partial-screen updates. The CTMU enables touch input through the same MCU, integrating display and touch without a separate controller. Designers route the PMP data/control lines as 50 ohm controlled-impedance traces and place 100 ohm ferrite beads on nearby switching supplies to reduce display interference. Compared to MCUs without PMP, this device eliminates external display-driver BOM.
Empfohlen
Capacitive Touch User Interfaces (mTouch)
The PIC32MX270F256BT-50I/SS uses its Charge Time Measurement Unit (CTMU) to implement Microchip mTouch capacitive touch buttons, sliders, and proximity sensors with 1 ns time-measurement resolution. The 28-SSOP exposes up to 19 GPIO-capable touch channels plus 10-bit ADC for self-capacitance measurement, supporting touch interfaces without dedicated hardware. Typical applications include appliance control panels, IoT buttons, and industrial HMI panels where mechanical switches would be unreliable. The 50 MHz core drives touch scanning loops for 12-16 touch pads in under 5 ms, providing responsive user feedback. The on-chip mTouch library accelerates firmware development with calibrated scan sequences.
Empfohlen
Industrial Sensor Hubs with USB CDC
For industrial sensor hubs, the PIC32MX270F256BT-50I/SS aggregates I2C sensors (temperature, pressure, humidity, gas) and forwards data over USB CDC virtual COM port to a host PC. The 50 MHz MIPS M4K core sustains multi-sensor polling plus USB bulk transfers up to 64 KB/s, suitable for PCB assembly. The 10-bit ADC with 1 Msps rate captures additional analog sensor inputs, and PPS flexibility routes any sensor to any GPIO without PCB rework. The industrial temperature grade (-40C to +85C) supports factory-floor deployment. The 256 KB Flash accommodates application firmware plus Microchip USB stack plus TCP/IP if Ethernet bridge is added.
Empfohlen
Home Automation IoT Devices
The PIC32MX270F256BT-50I/SS fits home automation hubs with USB-CDC for local configuration, Wi-Fi/BLE companion connectivity via SPI/UART, and on-chip CTMU for capacitive touch panels. The 50 MHz MIPS M4K core runs Wi-Fi AT command parsing plus local control loops at less than 50% CPU load. The 64 KB SRAM holds small MQTT message buffers and TLS hand-shake working memory if mbedTLS is integrated. The PMP interface drives status TFT displays showing device state, temperature, or schedule. The 28-pin package enables compact PCB designs under 25x25 mm. Low-power Sleep current (~20 uA typical) supports battery-powered sensors reporting over USB intermittently.
Empfohlen
USB-to-UART/I2C/SPI Bridge
The PIC32MX270F256BT-50I/SS implements a USB-to-UART/I2C/SPI bridge for legacy industrial equipment, replacing dedicated bridge ICs with programmable flexibility. The 256 KB Flash accommodates Microchip USB CDC plus protocol translation logic, and the 50 MHz core sustains full-speed USB bulk transfers plus multi-protocol bridging. The 64 KB SRAM buffers UART data at 921600 baud without loss while serving USB control transfers. The PPS peripheral remapping allows custom pin assignments for pin-limited form factors. Compared to fixed-function bridges like FT232, this solution supports custom baud rates, multi-protocol multiplexing, and over-the-air firmware updates over USB DFU.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC32MX270F256BT-50I/SS – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC32MX270F256B-50I/SS | PIC32MX170F256B-50I/SS | PIC32MX130F256B-I/SS | PIC32MX270F256BT-50I/ML | PIC32MX250F256H-50I/PT | PIC32MX230F256B-50I/SP |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | 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-QFN - different | 64-TQFP - different | 28-SPDIP - different |
| Core / Max Frequency | MIPS M4K / 50 MHz | MIPS M4K / 50 MHz | MIPS M4K / 50 MHz | MIPS M4K / 40 MHz | MIPS M4K / 50 MHz | MIPS M4K / 50 MHz | MIPS M4K / 50 MHz |
| Flash / SRAM | 256 KB / 64 KB | 256 KB / 64 KB | 256 KB / 64 KB | 256 KB / 64 KB | 256 KB / 64 KB | 256 KB / 64 KB | 256 KB / 64 KB |
| USB Controller | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB | USB 2.0 FS | USB 2.0 FS OTG | USB 2.0 FS OTG | No USB |
| I2S Modules | 2 | 2 | 2 | 0 | 2 | 2 | 2 |
| Parallel Master Port (PMP) | Yes | Yes | No | No | Yes | Yes | No |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Wichtigste Unterscheidungsmerkmale
- Integrated USB 2.0 Full-Speed with on-chip transceiver (vs. PIC32MX170F256B-50I/SS)
- Dual I2S/SPI modules for audio applications (vs. PIC32MX130F256B-I/SS)
- Parallel Master Port (PMP) for TFT graphics (vs. PIC32MX230F256B-50I/SP)
Designhinweise
USB D+/D- differential pair routing is critical for PIC32MX270F256BT-50I/SS designs. Route the pair as a 90 ohm differential with matched length tolerance within 150 mil. Place 27-33 ohm source series resistors within 4 mm of the MCU pins. According to Microchip datasheet DS60001168L, USB Full-Speed signal integrity requires 45 ohm single-ended impedance to ground, so stack-up design must include a continuous ground reference plane under the D+/D- pair.
The PIC32MX270F256BT-50I/SS requires a clean 3.3 V supply with bulk decoupling of 10 uF plus 0.1 uF ceramic capacitors placed within 5 mm of each VDD pin. According to Microchip datasheet DS60001168L, AVDD and VDD may share the same regulator but require separate analog/digital ground partitioning for ADC accuracy. Estimated: at 50 MHz active, core current is approximately 25 mA; at full peripheral utilization with USB active, total current can reach 60 mA, requiring a 3.3 V LDO rated at 150 mA minimum with adequate thermal headroom.
Common pitfalls when designing with PIC32MX270F256BT-50I/SS include: (1) forgetting the 4.7 kohm pull-up on D+ for USB device mode signaling, (2) not enabling the on-chip FRC/PLL correctly during initialization which causes USB enumeration to fail, (3) neglecting the MCLR pull-up resistor (typically 10 kohm) which prevents stable reset behavior, and (4) configuring PPS-mapped peripherals to pins already serving fixed-function alternate roles. The CTMU calibration must be performed before relying on capacitive touch readings; Microchip mTouch library provides reference calibration sequences in DS60001168L section 23.
The 28-SSOP package has thermal resistance theta_JA of approximately 80 C/W (per Microchip datasheet DS60001168L). At maximum 50 MHz with all peripherals active and typical 25 mA core current, total power dissipation is approximately 80 mW (3.3 V * 25 mA), resulting in 6.4C junction temperature rise above ambient. This is well within industrial temperature range without requiring a heat spreader. However, if the design operates at extended temperature range, validate thermal behavior with prototype measurement rather than calculated estimates.
Compliance-Informationen
RoHS compliant per Microchip product page. Lead-free matte-tin finish. Not AEC-Q100 qualified; the PIC32MX270F256BT-50I/SS targets industrial/consumer applications, not automotive. For automotive designs, look at PIC32MX series AEC-Q100 qualified variants (separate part numbers with V or -Q suffix).
