PIC32MX270F256B-V/SP - 256KB Flash MCU 28-SPDIP | Microchip
Teilenummer: PIC32MX270F256B-V/SP ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.32 | $6,32 |
| 10 | $5.71 | $57,10 |
| 100 | $4.95 | $495,00 |
| 500 | $4.27 | $2.135,00 |
| 1.000 | $3.74 | $3.740,00 |
PIC32MX270F256B-V/SP Übersicht
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable peripherals, used as the brain of embedded systems. The PIC32MX270 series specifically targets cost-sensitive 32-bit applications with USB and audio interfaces, fitting the hierarchy MCU -> 32-bit MCU -> MIPS-based MCU -> PIC32 family -> PIC32MX2xx sub-family. Its MIPS32 M4K core bridges 8-bit PIC and 32-bit MIPS architectures, simplifying migration from legacy PIC16/PIC24 designs.
Key differentiating features include two I2S/SPI modules for audio codecs, a Parallel Master Port (PMP) for graphics LCD interfaces, Peripheral Pin Select (PPS) for flexible pin assignment, an integrated USB 2.0 Full-Speed device/host/OTG controller, a Charge Time Measurement Unit (CTMU) for mTouch capacitive touch and 1 ns time measurement, and an on-chip temperature indicator. The 10-bit ADC runs up to 1 Msps with 28 analog inputs.
Architecture-wise, the device integrates Harvard-bus flash with prefetch, hardware multiply/divide, single-cycle bit manipulation, and 5-stage pipeline. Five 16-bit timers/captures, five compare/PWM outputs, two I2C, two UART, and a 16-bit parallel PMP give rich peripheral integration. The integrated USB PHY and on-chip transceiver eliminate external components, reducing BOM cost in USB-enabled designs.
Typical applications include USB peripherals (HID, CDC, mass storage), audio playback with I2S DACs, low-cost graphics interfaces with PMP-driven TFT displays, capacitive touch human-machine interfaces (HMIs), industrial control with USB diagnostics, and consumer appliances requiring 32-bit performance with PIC ecosystem familiarity. Its 28-SPDIP package suits through-hole prototyping, educational development, and legacy PCB designs.
Design consideration: PPS remapping must be configured in software before peripheral use, otherwise peripherals default to legacy pin assignments. For USB applications, the VBUS pin requires 5V tolerance handling per the datasheet. Place a 100 nF decoupling capacitor on each VDD pin and a bulk capacitor near the MCU power pins.
This page synthesizes distributor pricing, SPDIP pinout, and drop-in alternatives within the PIC32MX family that share the 28-pin SPDIP footprint, not found in the manufacturer datasheet alone.
Drop-in-Alternativen für PIC32MX270F256B-V/SP – 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 PIC32MX270F256B-V/SP (gleiche Bauform und Footprint) – abweichend in ADC, Package, SRAM, Maximum CPU Speed, Operating Temperature Range.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC32MX270F256B-I/SP
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX230F256B-V/SP
✅ Drop-In✓ Auf Lager
$4.1 / Stück
Datenblatt ansehen →PIC32MX250F256B-V/SP
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC32MX170F256B-V/SP
✅ Drop-In✓ Auf Lager
$3.05 / Stück
Datenblatt ansehen →PIC32MX270F256B-V/SP Grenzwerte & elektrische Eigenschaften
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Speed | 50 MHz |
| DMIPS Performance | 83 DMIPS |
| Program Flash Memory | 256 KB |
| SRAM | 64 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Typical Active Current | 0.5 mA/MHz |
| ADC | 10-bit, up to 1 Msps |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| I2S/SPI Modules | 2 |
| UART Modules | 2 |
| I2C Modules | 2 |
| 16-bit Timers | 5 |
| Input Capture / Output Compare | 5 / 5 |
| Parallel Master Port (PMP) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Charge Time Measurement Unit (CTMU) | Yes |
| mTouch Capacitive Touch Support | Yes |
| On-chip Temperature Sensor | Yes |
| Betriebstemperaturbereich | -40C to +105C (V grade) |
| Gehäuse | 28-pin SPDIP (Skinny Plastic DIP), through-hole |
| RoHS-Status | Compliant |
| Montageart | Through-Hole (DIP) |
PIC32MX270F256B-V/SP Pin-Konfiguration
| Pin 1 | RA0 — General I/O / AN0 / VREF+ / CVREF+ |
| Pin 2 | RA1 — General I/O / AN1 / VREF- / CVREF- |
| Pin 3 | RA2 — General I/O / AN2 / CVREF+ / VBUS sense input |
| Pin 4 | RA3 — General I/O / AN3 / CVREF+ |
| Pin 5 | RA4 — General I/O / AN4 / CTMUI / PMS |
| Pin 6 | AVDD — Analog VDD (2.3V to 3.6V) |
| Pin 7 | AVSS — Analog ground |
| Pin 8 | VDD — Digital VDD (2.3V to 3.6V) |
| Pin 9 | OSC1/CLKI/RC0 — Crystal oscillator input or external clock input |
| Pin 10 | OSC2/CLKO/RC1 — Crystal oscillator output |
| Pin 11 | RC2 — General I/O / OC1 / U1TX |
| Pin 12 | RC3 — General I/O / OC2 / U1RX |
| Pin 13 | RC4 — General I/O / OC3 / SDA1 |
| Pin 14 | RC5 — General I/O / OC4 / SCL1 |
| Pin 15 | RC6 — General I/O / OC5 / U2TX |
| Pin 16 | RC7 — General I/O / OC6 / U2RX |
| Pin 17 | RC8 — General I/O / U1CTS |
| Pin 18 | RC9 — General I/O / U1RTS |
| Pin 19 | VSS — Digital ground |
| Pin 20 | VDD — Digital VDD (2.3V to 3.6V) |
| Pin 21 | RB0 — General I/O / AN5 / PGED1 / ICSP data |
| Pin 22 | RB1 — General I/O / AN6 / PGEC1 / ICSP clock |
| Pin 23 | RB2 — General I/O / AN7 / OC1 |
| Pin 24 | RB3 — General I/O / AN8 / OC2 |
| Pin 25 | RB4 — General I/O / AN9 / OC3 |
| Pin 26 | RB5 — General I/O / AN10 / OC4 / VBUS sense |
| Pin 27 | RB6 — General I/O / AN11 / OC5 / PGED2 |
| Pin 28 | RB7 — General I/O / AN12 / OC6 / PGEC2 |
Typische Anwendungen
PIC32MX270F256B-V/SP ist geeignet für 6 Anwendungs: USB Human Interface Device (HID), Audio Playback with I2S DAC, Capacitive Touch HMI, Graphics LCD with Parallel Master Port, Industrial Control with USB Diagnostics, Consumer Appliance with USB Charging.
USB Human Interface Device (HID)
The PIC32MX270F256B-V/SP's integrated USB 2.0 Full-Speed controller with on-chip transceiver and 1 KB dedicated buffer makes it ideal for USB HID peripherals such as keyboards, mice, gamepads, and custom input devices. Its 50 MHz MIPS M4K core provides 83 DMIPS, sufficient to handle HID class drivers, descriptor parsing, and host polling at the standard 1 ms interval without CPU saturation. The 256 KB Flash accommodates USB stacks (e.g., Microchip Harmony) plus application code, while 64 KB SRAM supports HID report buffers and runtime stack. Compared to external-USB-MCU solutions, the integrated transceiver eliminates 2 to 3 passive components and reduces BOM cost. Design tip: route the USB D+/D- traces as a 90-ohm differential pair and place the 15 kohm pull-up on D+ only for full-speed device mode. The VBUS pin tolerates 5V directly per datasheet, simplifying bus-powered designs.
Empfohlen
Audio Playback with I2S DAC
The PIC32MX270F256B-V/SP's two I2S/SPI modules and 50 MHz MIPS core support audio streaming at up to 192 kHz sample rates when paired with an external I2S DAC like the PCM5102A or CS4344. With DMA-driven I2S transfer, the CPU is freed for decoding MP3, FLAC, or AAC codecs from SD card or USB mass storage. The 64 KB SRAM buffers 2-3 seconds of 44.1 kHz/16-bit audio, and 256 KB Flash stores lookup tables and small audio assets. CTMU enables volume control via capacitive-touch sliders. Unlike USB-only MCUs, the dual I2S module allows simultaneous DAC output and ADC input for echo/effects. Design tip: use 24.576 MHz or 22.5792 MHz external crystal to derive standard audio sample rates (44.1/48/96/192 kHz) without PLL jitter artifacts.
Empfohlen
Capacitive Touch HMI
The PIC32MX270F256B-V/SP's on-chip Charge Time Measurement Unit (CTMU) provides 1 ns time measurement resolution, enabling Microchip's mTouch capacitive touch sensing library to detect button presses, sliders, and wheels through glass or plastic overlays up to 10 mm thick. This eliminates dedicated touch ICs like the AT42QT1010 or CY8C401xx, reducing BOM cost by $0.50 to $1.50 per HMI. The 256 KB Flash stores touch algorithms plus user-interface state machines, and the 10-bit ADC reads the CTMU charge-time ratios without external analog components. Compared to mechanical buttons, mTouch provides IP65 sealing and 100 million-cycle reliability. Design tip: route touch sensor traces with ground guarding on both sides and avoid ground-plane fill under sensor pads to maximize sensitivity.
Empfohlen
Graphics LCD with Parallel Master Port
The PIC32MX270F256B-V/SP's Parallel Master Port (PMP) interface can drive small TFT LCDs up to 320x240 (QVGA) with 8-bit or 16-bit parallel data bus, supporting graphics displays without external controller ICs. Combined with the I2S module for touch-screen audio feedback and CTMU for resistive touch sensing, the MCU delivers complete HMI graphics with a single chip. At 50 MHz, the PMP can refresh QVGA panels at 30 fps using DMA-driven framebuffer updates. The 64 KB SRAM accommodates a 1-bpp 320x240 monochrome framebuffer (9.6 KB) with room for graphics libraries. Compared to SPI-only displays, PMP delivers 8x faster update rates. Design tip: place 100 ohm series resistors on PMP data lines near the MCU to dampen ringing on long LCD flex-cable traces.
Empfohlen
Industrial Control with USB Diagnostics
The PIC32MX270F256B-V/SP's USB Device mode and 50 MHz core make it suitable for industrial controllers requiring USB diagnostic logging, configuration, or firmware update. The 256 KB Flash stores Modbus RTU stacks plus USB CDC virtual COM port firmware, enabling the same MCU to run fieldbus protocols and connect to a PC for diagnostics. The -40C to +105C -V grade tolerates factory-floor temperatures near motors and power supplies. Five 16-bit timers handle PWM motor control up to 25 kHz switching frequency, while 5 compare/PWM outputs drive H-bridge drivers. Compared to PLCs, the integrated USB eliminates the need for RS-232 to USB bridge chips. Design tip: enable the watchdog timer with a 1-2 second timeout to recover from industrial EMI events.
Empfohlen
Consumer Appliance with USB Charging
The PIC32MX270F256B-V/SP's USB Host mode with battery-charging detection (BC1.2) makes it suitable for consumer appliances that read USB flash drives, charge phones, or interface with USB peripherals. With 256 KB Flash and 64 KB SRAM, the MCU runs file-system libraries (FAT32/exFAT) plus application code for media playback, data logging, or appliance control. The -V temperature grade suits appliances like coffee machines, kitchen hoods, and HVAC controllers where internal temperatures exceed 85C. The 10-bit ADC monitors thermistor inputs for safety cutoffs. Compared to 8-bit PIC16 alternatives, the 32-bit MIPS core delivers 10x the performance for the same power budget. Design tip: add 8 kV ESD protection on the USB VBUS pin to survive appliance-level surge events.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC32MX270F256B-V/SP – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC32MX270F256B-I/SP | PIC32MX230F256B-V/SP | PIC32MX250F256B-V/SP |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SPDIP (through-hole) | 28-SPDIP - same | 28-SPDIP - same | 28-SPDIP - same |
| Core / Speed | MIPS M4K / 50 MHz / 83 DMIPS | MIPS M4K / 50 MHz / 83 DMIPS | MIPS M4K / 50 MHz / 83 DMIPS | MIPS M4K / 50 MHz / 83 DMIPS |
| Flash / SRAM | 256 KB / 64 KB | 256 KB / 64 KB | 256 KB / 64 KB | 256 KB / 64 KB |
| USB Controller | Yes (FS Device/Host/OTG) | Yes (FS Device/Host/OTG) | No | No |
| CTMU (Capacitive Touch) | Yes | Yes | No | No |
| I2S Modules | 2 | 2 | 2 | 0 (SPI only) |
| Operating Temperature | -40C to +105C (V grade) | -40C to +85C (I grade) | -40C to +105C (V grade) | -40C to +105C (V grade) |
Wichtigste Unterscheidungsmerkmale
- Integrated USB 2.0 Full-Speed with on-chip transceiver and OTG support (vs. PIC32MX230F256B-V/SP)
- On-chip CTMU for capacitive touch and 1 ns time measurement (vs. PIC32MX250F256B-V/SP)
- Industrial/automotive -40C to +105C temperature grade (vs. PIC32MX270F256B-I/SP)
Designhinweise
The PIC32MX270F256B-V/SP requires two decoupling capacitors per VDD/AVDD pin pair: a 100 nF ceramic placed within 5 mm of each VDD pin (pins 8 and 20) for high-frequency noise, plus a 4.7 uF bulk capacitor near the MCU power pins for low-frequency transients. AVSS (pin 7) and VSS (pin 19) must connect directly to a low-impedance ground plane. Avoid sharing ground return paths with switching regulators or USB ESD diodes. Place a ferrite bead on VUSB (pin 18) if USB Host mode is used with significant inrush current.
Route the 50 MHz system clock trace from the crystal (pins 9-10) symmetrically with trace lengths matched within 1 mm, and surround it with a ground guard ring. Place the 8 MHz or 10 MHz crystal within 8 mm of pins 9 and 10 to minimize parasitic capacitance. The PGECx/PGEDx ICSP pins (RB0/RB1 or RB6/RB7) must remain accessible on the PCB for in-circuit programming - do not route them exclusively to BGA-style hidden balls or under connectors. Add a 4.7 kohm pull-up on MCLR if not actively driven.
Three common pitfalls when designing with this MCU: (1) Forgetting to configure Peripheral Pin Select (PPS) registers before using remapped peripherals - by default, peripherals remain on their legacy pin assignments; (2) Exceeding 3.6V on any I/O pin including VBUS - the USB VBUS pin tolerates 5V only when the internal USB regulator is enabled; (3) Using the CTMU without calibrating the reference current - the CTMU requires per-device trim values stored in the device's calibration flash area, accessed via the CFGCON register. Always read the latest errata document before production ramp.
Compliance-Informationen
RoHS and REACH compliant per Microchip product page. AEC-Q100 not explicitly qualified - the -V grade covers industrial/automotive temperature range but is not full automotive qualification. Lead-free and halogen-free per Microchip packaging specifications.
