PIC32MX270F256BT-V/SS - 32-bit 256KB Flash MCU, AEC-Q100 | Microchip
MPN: PIC32MX270F256BT-V/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.61 | $2,610.00 |
PIC32MX270F256BT-V/SS Overview
A 32-bit microcontroller (MCU) is an integrated microprocessor core with on-chip Flash program memory, SRAM data memory, and a rich peripheral set designed for embedded control. The PIC32MX family uses the MIPS M4K 32-bit RISC core and occupies the mid-tier of Microchip's MCU portfolio between 8/16-bit PIC microcontrollers and the higher-end Cortex-M based SAM/PIC32MZ families. AEC-Q100 qualification means the silicon has been characterized for automotive electrical and environmental stress, distinguishing the -V variant from the industrial -I grade.
Key features of the PIC32MX270F256BT-V/SS include 256 KB Flash, 64 KB RAM, 50 MHz / 83 DMIPS core, 10-bit ADC, two I2S/SPI, two UART, two I2C, USB OTG, Parallel Master Port (PMP), mTouch capacitive touch support, Charge Time Measurement Unit (CTMU), 1 ns high-resolution timer, Peripheral Pin Select, and four DMA channels. The CTMU enables capacitive touch sensing by precisely measuring sub-picofarad capacitance changes, while PPS remaps digital peripherals to almost any I/O pin, simplifying PCB layout.
The PIC32MX270F256B die integrates dual PLL blocks - one for the system clock and one for the 48 MHz USB clock - which lets the CPU and USB run at independent optimal frequencies. The PIC32MX1XX/2XX family shares a single peripheral library, MPLAB Harmony framework support, and pin compatibility across most package footprints, allowing code reuse from PIC24/dsPIC33 designs.
Typical applications include automotive body controllers, HVAC interfaces, infotainment auxiliary MCUs, USB device/host peripherals, capacitive touch HMIs, and audio I/O modules using I2S. The AEC-Q100 grade makes this -V variant especially suited to under-hood and cabin modules subject to ISO 7637 transient stress.
When designing, place a 10 uF + 0.1 uF bulk/decoupling pair close to VDD pins and a separate 0.1 uF on VCAP to stabilize the internal 1.8 V LDO. For USB, route the D+/D- pair as a 90-ohm differential and place the 48 MHz crystal within 5 mm of the OSC pins.
This page synthesizes distributor pricing, AEC-Q100 -V vs -I selection guidance, drop-in PIC32MX1XX/2XX family alternatives, and practical decoupling layout notes not found in the standalone datasheet.
Drop-in alternatives for PIC32MX270F256BT-V/SS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC32MX270F256BT-V/SS (same form factor and footprint) — differing in Package, ADC, Timers, DMA Channels, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC32MX270F256BT-I/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.89 / Unit
View Datasheet →PIC32MX270F256BT-V/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.45 / Unit
View Datasheet →PIC32MX270F256BT-V/ML
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.38 / Unit
View Datasheet →PIC32MX170F256BT-V/SS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC32MX230F256BT-V/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.05 / Unit
View Datasheet →PIC32MX150F128BT-V/SS
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.69 / Unit
View Datasheet →PIC32MX270F256BT-V/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 50 MHz |
| DMIPS Performance | 83 DMIPS |
| Flash Program Memory | 256 KB (256K x 8) |
| SRAM Data Memory | 64 KB |
| Operating Voltage (VDD) | 2.5 V / 3.3 V |
| Active Current (Typical) | 0.5 mA / MHz |
| Operating Temperature | -40 C to +105 C (AEC-Q100 Grade 2) |
| ADC | 10-bit |
| USB | USB 2.0 Full-Speed OTG |
| UART | 2 |
| I2C | 2 |
| I2S / SPI | 2 I2S/SPI modules |
| DMA Channels | 4 |
| Peripheral Pin Select (PPS) | Yes |
| Parallel Master Port (PMP) | Yes |
| CTMU (Capacitive Touch) | Yes |
| mTouch Support | Yes |
| Package | 28-pin SSOP (5.30 mm width) |
| Mounting Type | Surface Mount (Tape and Reel) |
| AEC-Q100 | Qualified (automotive grade) |
| RoHS Status | Compliant |
PIC32MX270F256BT-V/SS Pin Configuration
| Pin 1 | SDA1/RA15 — I2C1 SDA / GPIO |
| Pin 2 | SCL1/RA14 — I2C1 SCL / GPIO |
| Pin 3 | MCLR — Master Clear (reset, active-low) |
| Pin 4 | VSS — Ground |
| Pin 5 | VDD — Digital supply 2.5-3.6 V |
| Pin 6 | OSC1/CLKI/RC12 — Crystal oscillator input / external clock |
| Pin 7 | OSC2/CLKO/RC15 — Crystal oscillator output |
| Pin 8 | VCAP — Internal LDO output - decouple with 10 uF + 0.1 uF |
| Pin 9 | VSS — Ground |
| Pin 10 | RB0/PGD — GPIO / ICD data |
| Pin 11 | RB1/PGC — GPIO / ICD clock |
| Pin 12 | RB2/RB8 — GPIO / USB-ID (PPS remappable) |
| Pin 13 | RB3/RB9 — GPIO / USB OC fault (PPS remappable) |
| Pin 14 | VUSB — USB internal transceiver supply - decouple with 0.1 uF |
| Pin 15 | D-/RB4 — USB D- / GPIO |
| Pin 16 | D+/RB5 — USB D+ / GPIO |
| Pin 17 | RB6 — GPIO / PMP / I2S |
| Pin 18 | RB7 — GPIO / PMP / I2S |
| Pin 19 | RC4 — GPIO / UART / SPI |
| Pin 20 | RC5 — GPIO / UART / SPI |
| Pin 21 | RC6 — GPIO / UART / SPI |
| Pin 22 | RC7 — GPIO / UART / SPI |
| Pin 23 | RC8 — GPIO / SPI / I2S |
| Pin 24 | RC9 — GPIO / SPI / I2S |
| Pin 25 | RA0 — GPIO / ADC |
| Pin 26 | RA1 — GPIO / ADC |
| Pin 27 | VSS — Ground |
| Pin 28 | VDD — Digital supply 2.5-3.6 V |
Typical Applications
PIC32MX270F256BT-V/SS is suitable for 7 applications: Automotive Body Control Module, USB Device/Host Peripheral, Capacitive Touch HMI, Audio I/O Module with I2S Codec, Industrial IoT Sensor Hub, Graphics Interface via PMP, Automotive Infotainment Auxiliary MCU.
Automotive Body Control Module
The PIC32MX270F256BT-V/SS is ideally suited for automotive body control modules due to its AEC-Q100 Grade 2 qualification and -40C to +105C operating range. Its 256 KB Flash and 64 KB SRAM easily handle CAN-style message routing, lighting control, and mirror/fold sequencing, while the dual PLBs allow the CPU and a downstream LIN bus to run at independent frequencies without jitter. The CTMU and mTouch peripherals enable capacitive touch buttons for door handles and overhead consoles without external touch ICs. Place 100 nF + 10 uF decoupling on each VDD pin and route the USB D+/D- pair as a 90-ohm differential if diagnostic USB is used.
Recommended
USB Device/Host Peripheral
The integrated USB 2.0 full-speed OTG controller with dedicated 48 MHz PLL makes the PIC32MX270F256BT-V/SS ideal for USB peripherals such as diagnostic tools, data loggers, and HID interfaces. The 256 KB Flash accommodates USB class driver stacks (CDC, HID, MSD) plus vendor-specific descriptors, while the 64 KB SRAM buffers USB packets without CPU intervention via the four DMA channels. The dedicated USB PLL eliminates the need for an external 48 MHz oscillator, reducing BOM. A 1.5 kohm pull-up on D+ selects full-speed and signals device attach to the host.
Recommended
Capacitive Touch HMI
The PIC32MX270F256BT-V/SS integrates the Charge Time Measurement Unit (CTMU) which provides 1 ns time measurement resolution, enabling reliable capacitive touch button and slider sensing even in noisy automotive environments. Combined with mTouch firmware libraries, designers can implement 12+ capacitive channels using just the ADC and CTMU without an external touch IC. The PPS block lets touch sensor pins be placed anywhere on the PCB for ergonomic layouts, while the 50 MHz core runs the touch scanning loop and the main application in a single thread.
Recommended
Audio I/O Module with I2S Codec
With two independent I2S/SPI modules, the PIC32MX270F256BT-V/SS can simultaneously interface to an audio CODEC (I2S) and a digital amplifier or external memory (SPI). The 50 MHz MIPS M4K core provides enough DMIPS to run sample-rate conversion and basic audio processing, while DMA offloads the I2S streams to keep CPU overhead below 5%. The 64 KB SRAM serves as a comfortable audio buffer for short effects chains. I2S MCLK is typically derived from the system PLL using PPS routing to any digital I/O pin.
Recommended
Industrial IoT Sensor Hub
The combination of 256 KB program space, 10-bit ADC, four DMA channels, and two UART/I2C ports makes the PIC32MX270F256BT-V/SS well suited as an industrial sensor aggregation hub that gathers data from multiple Modbus RTU slaves over UART or I2C, samples its analog inputs at high speed via DMA, and reports aggregated readings over USB or a wireless companion. The -V AEC-Q100 grade ensures operation up to +105C, which covers most industrial cabinet environments. PPS allows sensor buses to be remapped for layout flexibility, and CTMU can probe thermistor capacitance shifts for drift compensation.
Recommended
Graphics Interface via PMP
The Parallel Master Port (PMP) on the PIC32MX270F256BT-V/SS drives external graphics controllers or small parallel TFT displays directly from the MCU, eliminating an external graphics ASIC in low-cost HMIs. The 50 MHz bus and DMA support smooth panning through framebuffers stored in the 64 KB SRAM (sized for 320x240 8bpp pages). Combined with mTouch for on-screen input and USB for firmware updates, this part forms a complete low-cost HMI platform for appliances, exercise equipment, and instrumentation.
Recommended
Automotive Infotainment Auxiliary MCU
The PIC32MX270F256BT-V/SS serves as an auxiliary microcontroller in head units and rear-seat entertainment, offloading HVAC button scanning, ambient lighting PWM, and IR remote receive from the application processor. USB OTG supports direct media stick playback under MSC class, while dual I2S allows simultaneous Bluetooth audio CODEC and amplifier control. The AEC-Q100 grade and -40C to +105C range cover automotive cabin thermal stress without derating. Designers should reserve a VCAP 10 uF + 100 nF pair and route the 48 MHz USB crystal traces within 5 mm.
Recommended
Recommended Products Summary
Engineering reference data for PIC32MX270F256BT-V/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC32MX270F256BT-I/SS | PIC32MX170F256BT-V/SS | PIC32MX230F256BT-V/SS | PIC32MX150F128BT-V/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-pin SSOP | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same |
| Flash | 256 KB | 256 KB | 256 KB | 256 KB | 128 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 32 KB |
| Core Frequency | 50 MHz / 83 DMIPS | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| USB OTG | Yes (USB 2.0 FS) | Yes | No | Yes | No |
| I2S/SPI Modules | 2 | 2 | 2 | 1 | 2 |
| Temperature Grade | -40 C to +105 C (AEC-Q100) | -40 C to +85 C (industrial) | -40 C to +105 C (AEC-Q100) | -40 C to +105 C (AEC-Q100) | -40 C to +105 C (AEC-Q100) |
| DMA Channels | 4 | 4 | 4 | 4 | 4 |
Key Differentiators
- AEC-Q100 Grade 2 qualification (vs PIC32MX270F256BT-I/SS)
- Dual I2S/SPI modules (vs PIC32MX230F256BT-V/SS)
- Dedicated USB PLL (vs PIC32MX170F256BT-V/SS)
Design Notes
Place a 10 uF + 0.1 uF ceramic pair on each of the two VDD pins and a separate 0.1 uF on the VCAP pin to stabilize the internal 1.8 V LDO. The VCAP pin supplies the core logic; inadequate decoupling causes erratic operation under USB burst loading. Estimated: a 10 uF X5R 6.3 V 0805 ceramic per VDD plus 100 nF X7R is the minimum per the PIC32MX1XX/2XX family datasheet (DS60001168).
Route the USB D+ and D- traces as a 90-ohm differential pair with continuous ground reference on the layer below. Keep the pair matched within 150 mil of each other and place the 48 MHz USB crystal within 5 mm of the OSC1/OSC2 pins. Add a 1.5 kohm pull-up on D+ to declare full-speed device mode to the host. Do not route noisy digital signals across the differential pair.
Do not omit the MCLR pull-up; the PIC32MX270F256BT-V/SS will not start without it. Use a 10 mF + 100 nF pair on VCAP - values below 4.7 mF cause brownouts under USB load. Configure unused I/O as outputs low (not inputs floating) to avoid shoot-through and spurious interrupts. Estimated: VCAP ripple must stay below 50 mV pk-pk during USB suspend/resume.
For automotive CAN or USB-CB-2.0 designs, add a ferrite bead on VDD if the supply rail shares other noise sources. The PIC32MX270F256BT-V/SS AEC-Q100 grade does not replace its inputs with the use of proper input filtering. Estimated: a 600-ohm 0402 ferrite (e.g., BLM18PG471SN1) in series with VDD at the IC pin improves conducted immunity by 10-15 dB.
Use the PPS feature to remap digital peripherals away from analog-sensitive pins; this avoids cross-talk in mixed-signal layouts. Place the ICSP PGd/PGc pair (RB0/RB1) on a 0.1-inch header for PICkit programming without rework. Estimated: 10 mm trace stubs on the ICSP pair are tolerable; longer stubs violate the ICD timing specification.
Compliance Information
AEC-Q100 Grade 2 qualified per Microchip product page. RoHS and REACH compliant per datasheet. Halogen-free per Microchip environmental compliance disclosure.
