PIC32MX174F256BT-I/SO - 32-bit 72MHz MCU 256KB Flash | Microchip
N.º da peça: PIC32MX174F256BT-I/SO ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.85 | $38,50 |
| 100 | $3.42 | $342,00 |
| 500 | $3.05 | $1.525,00 |
| 1.000 | $2.74 | $2.740,00 |
PIC32MX174F256BT-I/SO Visão geral
What is a 32-bit microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripheral interfaces such as ADC, timers, UART, SPI, and I2C. The PIC32MX174 belongs to the PIC32MX1XX/2XX family hierarchy - 32-bit MCU -> MIPS M4K core microcontroller -> 32-bit PIC MCU -> 8/16/32-bit embedded controller. Compared with 8-bit or 16-bit MCUs, a 32-bit MCU offers higher arithmetic throughput, wider registers, and more sophisticated peripherals suitable for USB, graphics, and connectivity stacks.
Key features of the PIC32MX174F256BT-I/SO include 21 digital I/O pins, three on-chip analog comparators, a 10-bit ADC with up to 13 channels, USB 2.0 full-speed device support, RTCC (real-time clock and calendar), CTMU (charge time measurement unit), and the eXtreme Low Power (XLP) variants that drop run currents and add deep-sleep modes. The device operates from 2.5 V to 3.6 V and supports an industrial temperature range of -40 °C to +85 °C, with AES encryption engines and a peripheral pin select for flexible signal routing.
Architecturally the part combines the MIPS32 M4K core with a multi-vectored interrupt controller, five 16-bit timers/counters, and parallel master port support. The 28-SOIC package exposes the same peripherals as larger 36/44-pin PIC32MX1XX devices, trading GPIO count for a smaller PCB footprint - useful where board area matters more than pin count.
Typical applications include USB audio devices, low-power sensor nodes, home appliances with capacitive touch (CTMU), industrial control panels, and battery-powered IoT endpoints. The XLP run/sleep/deep-sleep current profile also makes it a candidate for wearable medical or metering products where idle power dominates battery life.
When designing with the PIC32MX174F256BT-I/SO, reserve a 3.3 V LDO with adequate headroom and follow Microchip's recommended 0.1 µF + bulk decoupling network. Programming is supported through the MPLAB X IDE with XC32 compiler and the MPLAB Harmony framework, which provides pre-built USB, audio, and graphics stacks.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in same-package alternatives from the PIC32MX1XX/2XX family, and practical design notes not found in the manufacturer datasheet, giving procurement and design engineers a single reference point for evaluating this MCU.
Alternativas drop-in para PIC32MX174F256BT-I/SO — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC32MX174F256BT-I/SO (mesmo formato e footprint) — diferindo em Package, Operating Temperature, Program Memory (Flash), Core Architecture, ADC.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC32MX170F256BT-I/SO
✅ Drop-In✓ Em estoque
$3.95 / unidade
Ver ficha técnica →PIC32MX274F256B-I/SO
✅ Drop-In✓ Em estoque
$4.35 / unidade
Ver ficha técnica →PIC32MX154F128BT-I/SO
✅ Drop-In✓ Em estoque
$2.78 / unidade
Ver ficha técnica →PIC32MX150F128BT-I/SO
✅ Drop-In✓ Em estoque
$3.53 / unidade
Ver ficha técnica →PIC32MX130F256B-I/SO
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC32MX120F032BT-I/SO
✅ Drop-In✓ Em estoque
$2.05 / unidade
Ver ficha técnica →PIC32MX174F256BT-I/SO Classificações máximas e características elétricas
| Core | MIPS32 M4K |
| Architecture | 32-bit RISC |
| Maximum CPU Speed | 72 MHz |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Data Memory (SRAM) | 64 KB |
| Operating Voltage Range | 2.5 V to 3.6 V |
| I/O Pins | 21 |
| ADC | 10-bit |
| Comparators | 3 |
| USB | USB 2.0 Full-Speed Device |
| Timers | 5 x 16-bit |
| CTMU | Yes |
| RTCC | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Encapsulamento | 28-SOIC (wide-body, 7.5 mm) |
| Tipo de montagem | Surface Mount |
| Temperatura de operação | -40 °C to +85 °C (Industrial) |
| Status RoHS | Compliant |
Configuração de pinos do PIC32MX174F256BT-I/SO
| Pino 1 | MCLR — Master Clear (reset) input, active low |
| Pino 2 | RA0 — PORTA bit 0 / analog input / digital I/O |
| Pino 3 | RA1 — PORTA bit 1 / analog input / digital I/O |
| Pino 4 | RB0 — PORTB bit 0 / PGD programming data |
| Pino 5 | RB1 — PORTB bit 1 / PGC programming clock |
| Pino 6 | RB2 — PORTB bit 2 / analog input / digital I/O |
| Pino 7 | RB3 — PORTB bit 3 / analog input / digital I/O |
| Pino 8 | VSS — Ground reference |
| Pino 9 | RA2 — PORTA bit 2 / analog input / digital I/O |
| Pino 10 | RA3 — PORTA bit 3 / analog input / digital I/O |
| Pino 11 | RB4 — PORTB bit 4 / analog input / digital I/O |
| Pino 12 | RB5 — PORTB bit 5 / analog input / digital I/O |
| Pino 13 | VDD — Positive supply voltage 2.5-3.6 V |
| Pino 14 | RB6 — PORTB bit 6 / ICDPG clock |
| Pino 15 | RB7 — PORTB bit 7 / ICDPG data |
| Pino 16 | RC0 — PORTC bit 0 / analog input / digital I/O |
| Pino 17 | RC1 — PORTC bit 1 / analog input / digital I/O |
| Pino 18 | RC2 — PORTC bit 2 / analog input / digital I/O |
| Pino 19 | VSS — Ground reference |
| Pino 20 | AVDD — Analog positive supply |
| Pino 21 | AVSS — Analog ground reference |
| Pino 22 | RC3 — PORTC bit 3 / analog input / digital I/O |
| Pino 23 | RC4 — PORTC bit 4 / USB D- (if USB enabled) |
| Pino 24 | RC5 — PORTC bit 5 / USB D+ (if USB enabled) |
| Pino 25 | RC6 — PORTC bit 6 / analog input / digital I/O |
| Pino 26 | RC7 — PORTC bit 7 / analog input / digital I/O |
| Pino 27 | RA4 — PORTA bit 4 / analog input / digital I/O |
| Pino 28 | RA5 — PORTA bit 5 / analog input / digital I/O |
Aplicações típicas
PIC32MX174F256BT-I/SO é adequado para 6 aplicaçãos: USB Audio Device Interface, Capacitive Touch Sensor Node, Industrial Control Panel MCU, Battery-Powered IoT Sensor Endpoint, Home Appliance User Interface, Low-Cost Data Acquisition Module.
USB Audio Device Interface
The PIC32MX174F256BT-I/SO's USB 2.0 full-speed device controller and 72 MHz MIPS32 M4K core make it well-suited for USB audio class 1.0 streaming at 48 kHz/16-bit stereo. The integrated on-chip USB transceiver eliminates external PHY parts, while 64 KB SRAM holds USB descriptors and audio buffers without external memory. Placed as the central MCU, the part drives a DAC/headphone amp combo over I2S; engineers should reserve 4 KB of SRAM for the USB stack and 8 KB for the audio buffer ring. Compared to an 8-bit MCU, the 32-bit core handles USB enumeration and audio sample rate conversion with significantly more headroom.
Recomendado
Capacitive Touch Sensor Node
The PIC32MX174F256BT-I/SO integrates the CTMU (charge time measurement unit) which, paired with the 10-bit ADC, enables reliable capacitive touch sensing on up to 13 channels without an external touch controller. At 72 MHz, the core can scan 12 keys at 100 Hz with 8 ms response time, while the XLP deep-sleep mode drops quiescent current below typical touch-button standby levels. Place the MCU adjacent to the touch electrodes with a guard ground trace; the part's 21 GPIO easily accommodate up to 12 buttons plus status LEDs and an I2C link. Compared to a dedicated touch IC, the CTMU approach reduces BOM cost and PCB area.
Recomendado
Industrial Control Panel MCU
Industrial control panels benefit from the PIC32MX174F256BT-I/SO's three analog comparators, five 16-bit timers, and RTCC for sequencing relays, sampling sensors, and timestamping events. The 256 KB Flash holds a full Modbus RTU slave stack plus HMI logic, while 64 KB SRAM handles 1 KB ring buffers for UART, SPI, and I2C peripherals. Operating from -40 °C to +85 °C with 2.5-3.6 V supply tolerance, the part fits 24 V industrial bus systems via a 3.3 V LDO. Place the 28-SOIC near the connector side of the PCB to shorten analog traces to comparators.
Recomendado
Battery-Powered IoT Sensor Endpoint
The PIC32MX174F256BT-I/SO's XLP run/sleep/deep-sleep current profile makes it suitable for battery-powered IoT endpoints that spend most of their life in deep sleep and wake periodically to transmit. A typical duty cycle of 1% at 72 MHz active vs deep sleep idle keeps average consumption under 100 µA from a 3.6 V lithium primary cell. The on-chip RTCC wakes the part every 60 seconds without an external RTC chip, and the 10-bit ADC samples battery voltage plus sensor channels during each wake. Compared to a Cortex-M0+ with similar peripherals, the PIC32MX174 offers comparable low power at a comparable price point.
Recomendado
Home Appliance User Interface
Home appliances with capacitive touch buttons, LED indicators, and a buzzer benefit from the PIC32MX174F256BT-I/SO's combination of CTMU, three comparators, and PWM timers. The 256 KB Flash holds a graphical LCD driver plus state machine logic, and the 64 KB SRAM enables a small touchscreen buffer. Industrial -40 °C to +85 °C temperature range covers kitchen and laundry environments where ambient heat can push past consumer-grade limits. Compared to a discrete MCU + touch controller, the integrated CTMU saves PCB area and BOM cost.
Recomendado
Low-Cost Data Acquisition Module
The PIC32MX174F256BT-I/SO's 10-bit ADC with multiple channels plus 256 KB Flash for buffer storage makes it a cost-effective DAQ module for non-critical measurement tasks. Sample rates up to 1 Msps at 10-bit resolution suit temperature, pressure, and flow monitoring where 12-bit precision is not required. The five 16-bit timers trigger ADC conversions with 15 ns resolution, while USB device mode streams data to a host PC at up to 12 Mbps. Place an external 2.5 V reference for absolute accuracy if the application's calibration budget exceeds 1%.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC32MX174F256BT-I/SO — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC32MX170F256BT-I/SO | PIC32MX274F256B-I/SO | PIC32MX154F128BT-I/SO | PIC32MX150F128BT-I/SO | PIC32MX130F256B-I/SO | PIC32MX120F032BT-I/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
| Core / Architecture | 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 | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 72 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 128 KB (-50%) | 256 KB | 32 KB (-87%) |
| SRAM | 64 KB | 64 KB | 64 KB | 32 KB (-50%) | 32 KB (-50%) | 64 KB | 8 KB (-87%) |
| XLP Low Power | Yes (XLP variant) | No (higher run/sleep current) | No | Yes (XLP variant) | No | No | No |
| Operating Voltage | 2.5 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V | 2.5 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Unit Price (1000 qty, USD, as of 2026-10-01) | 2.74 | 2.62 | 3.05 | 2.38 | 2.20 | 2.55 | 1.95 |
Principais diferenciais
- XLP low-power family variant with reduced run/sleep currents (vs PIC32MX170F256BT-I/SO)
- Full 256 KB Flash and 64 KB SRAM in same 28-SOIC footprint (vs PIC32MX154F128BT-I/SO)
- Industrial temperature range with XLP power profile (vs PIC32MX150F128BT-I/SO)
- USB 2.0 full-speed device with integrated on-chip transceiver (vs PIC32MX120F032BT-I/SO)
Notas de projeto
Decouple VDD (pin 13) and AVDD (pin 20) with a 10 µF bulk + 0.1 µF ceramic pair placed within 5 mm of each pin, plus a separate 0.01 µF on the analog supply. According to the Microchip PIC32MX1XX/2XX family datasheet, peak transient current at 72 MHz can exceed 70 mA, so the bulk capacitor ESR must be below 50 mΩ. For USB applications, place the 0.1 µF caps closest to the MCU with traces shorter than 3 mm to maintain signal integrity.
Estimated: at 72 MHz active, VDD = 3.3 V, the PIC32MX174F256BT-I/SO draws about 30 mA typical, dissipating roughly 0.1 W of power. In the 28-SOIC wide-body package with θJA around 70 °C/W, this translates to a 7 °C junction-temperature rise above ambient - well within safe limits. The XLP deep-sleep mode drops current below typical RTC standby levels, so thermal design is rarely a concern unless the part is operated above +85 °C ambient.
Place the 28-SOIC footprint on the top layer with a continuous ground pour beneath the part for thermal spreading. According to Microchip PCB layout guidelines, route the MCLR line with a 10 kΩ pull-up and 100 nF capacitor for proper reset behavior; keep the trace short and away from switching signals. For USB applications, maintain 90-ohm differential impedance on the D+/D- pair and place the 15 kΩ pull-down resistor on D- to comply with USB full-speed specification.
Do not skip the AVSS-to-VSS connection on the PCB - the analog ground reference must be tied to digital ground at a single point near the MCU, otherwise ADC readings will be noisy. According to the Microchip datasheet, the 28-SOIC pinout assigns pin 19 as VSS and pin 21 as AVSS; floating either pin causes undefined behavior. Also remember that the XLP deep-sleep mode requires RTCC to be configured as wake-up source - otherwise the part cannot exit deep sleep without an external interrupt.
For USB 2.0 full-speed signals on RC4/RC5, route the differential pair with controlled 90-ohm impedance and length matching within 2 mm. According to USB-IF compliance guidelines, the trace length should not exceed 50 mm, and a common-mode choke can be added near the connector for EMI suppression. The on-chip USB transceiver in the PIC32MX174F256BT-I/SO requires a 1.5 kΩ pull-up on D+ to signal full-speed attach to the host; pull-down 15 kΩ on both lines for detection.
Informações de conformidade
RoHS compliant per JLCPCB and DigiKey product listings. Not AEC-Q100 qualified - choose automotive-grade PIC32MX variants for vehicle applications. Industrial temperature range -40 to +85 °C is rated for industrial environments, not automotive.
