PIC32MX340F256H-80V/PT - 32-Bit 80MHz 256KB Flash MCU | Microchip
料号： PIC32MX340F256H-80V/PT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.32 | $7.32 |
| 10 | $6.59 | $65.90 |
| 100 | $5.86 | $586.00 |
| 500 | $5.13 | $2,565.00 |
| 1,000 | $4.4 | $4,400.00 |
PIC32MX340F256H-80V/PT 概述
A 32-bit microcontroller (MCU) is an integrated processor with a 32-bit data path, on-chip Flash program memory, RAM, and configurable peripherals such as ADC, timers, and communication interfaces. Within the embedded hierarchy, the PIC32MX sits between 8/16-bit MCUs and Cortex-M4 cores, delivering higher performance while retaining deterministic interrupt behavior. The PIC32MX3xx/4xx family is widely used in consumer, industrial, and USB-enabled applications where MIPS instruction-set familiarity and MPLAB X toolchain support matter.
Key features of the PIC32MX340F256H-80V/PT include 256KB (256K x 8) Flash program memory, 32KB (32K x 8) RAM, DMA controller for CPU-offload data movement, and integrated USB 2.0 full-speed device/host/OTG. The device provides 53 general-purpose I/O, multiple UART/SPI/I2C interfaces, a 10-bit 1 Msps ADC, and a parallel master port for external memory. Code protection, JTAG boundary scan, and trace support enable robust debugging.
Architecturally, the PIC32MX340F256H uses the MIPS32 M4K core with 5-stage pipeline, hardware multiply/divide, and a prefetch cache. The internal oscillator and PLL allow flexible clocking up to 80 MHz. Compared to PIC24/dsPIC parts, the PIC32MX340F256H delivers significantly higher Dhrystone MIPS (∼1.5 DMIPS/MHz) while sharing peripheral IP, easing migration from 16-bit designs.
Typical applications include USB peripherals (HID, CDC, mass storage), industrial control panels, graphical user interfaces with parallel-port LCDs, and consumer audio/automation hubs. The wide peripheral mix and DMA support also make it suitable for data-acquisition front ends and embedded web servers.
When designing with the -80V grade (operating -40C to +105C), reserve ample Flash/RAM headroom for USB stacks (typically 30-40 KB). Always provide a stable 3.3V rail with at least 100 mA headroom and place decoupling capacitors close to the VDD/VSS pins per the datasheet layout guide.
This page synthesizes distributor pricing, drop-in alternatives from the PIC32MX family, and practical design notes not found on the manufacturer datasheet alone.
直接替换替代料： PIC32MX340F256H-80V/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC32MX340F256H-80V/PT （相同外形与封装尺寸） ——差异在于 ADC, Package, Operating Temperature, DMA Channels, USB.
快速对比工具——选择替代料号进行并排对比：
PIC32MX340F256H-80I/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX340F256HT-80V/PT
✅ 直接替换📋 参考替代料（不在目录中）
PIC32MX340F128H-80I/PT
✅ 直接替换✓ 有现货
$4.61 / 个
查看数据手册 →PIC32MX340F128HT-80V/PT
✅ 直接替换✓ 有现货
$5.6 / 个
查看数据手册 →PIC32MX340F128H-80V/MR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.72 / 个
查看数据手册 →PIC32MX340F256H-80V/PT 最大额定值与电气特性
| Core Architecture | MIPS32 M4K |
| 数据总线宽度 | 32-bit |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM Size | 32 KB (32K x 8) |
| Maximum CPU Frequency | 80 MHz |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Number of I/O Pins | 53 |
| ADC | 10-bit, 1 Msps |
| 封装 | 64-pin TQFP (10x10x1 mm) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +105C (-80V grade) |
| DMA Channels | Yes |
| USB Interface | USB 2.0 Full-Speed Device/Host/OTG |
| Communication Interfaces | UART, SPI, I2C, PMP |
| RoHS 状态 | Compliant |
PIC32MX340F256H-80V/PT 引脚配置
| 引脚 1 | RP15/PMPDO/RD4 — I/O port D4 / Parallel Master Port data |
| 引脚 2 | RP14/PMPD1/RD5 — I/O port D5 / PMP data |
| 引脚 3 | RP13/PMD2/RD6 — I/O port D6 / PMP data |
| 引脚 4 | RP12/PMD3/RD7 — I/O port D7 / PMP data |
| 引脚 5 | RP11/PMD4/RD8 — I/O port D8 / PMP data |
| 引脚 6 | RP10/PMD5/RD9 — I/O port D9 / PMP data |
| 引脚 7 | RP9/PMD6/RD10 — I/O port D10 / PMP data |
| 引脚 8 | RP8/PMD7/RD11 — I/O port D11 / PMP data |
| 引脚 9 | VSS — Ground reference |
| 引脚 10 | VDD — Positive supply (2.3V-3.6V) |
| 引脚 11 | RP7/PMD8/RD0 — I/O port D0 / PMP data |
| 引脚 12 | RP6/PMD9/RD1 — I/O port D1 / PMP data |
| 引脚 13 | RP5/PMD10/RD2 — I/O port D2 / PMP data |
| 引脚 14 | RP4/PMD11/RD3 — I/O port D3 / PMP data |
| 引脚 15 | VCAP — Voltage regulator bypass capacitor (4.7uF to VSS) |
| 引脚 16 | PGEC2/RP3/RB3 — I/O port B3 / ICSP clock |
| 引脚 17 | PGED2/RP2/RB2 — I/O port B2 / ICSP data |
| 引脚 18 | PGEC1/RP1/RB1 — I/O port B1 / ICSP clock |
| 引脚 19 | PGED1/RP0/RB0 — I/O port B0 / ICSP data |
| 引脚 20 | VSS — Ground reference |
| 引脚 21 | VDD — Positive supply (2.3V-3.6V) |
| 引脚 22 | AN12/RP28/RB12 — Analog input 12 / I/O port B12 |
| 引脚 23 | AN11/RP27/RB11 — Analog input 11 / I/O port B11 |
| 引脚 24 | AN10/RP26/RB10 — Analog input 10 / I/O port B10 |
| 引脚 25 | AN9/RP25/RB9 — Analog input 9 / I/O port B9 |
| 引脚 26 | AN8/RP24/RB8 — Analog input 8 / I/O port B8 |
| 引脚 27 | AN7/RP23/RB7 — Analog input 7 / I/O port B7 |
| 引脚 28 | AN6/RP22/RB6 — Analog input 6 / I/O port B6 |
| 引脚 29 | AN5/RP21/RB5 — Analog input 5 / I/O port B5 |
| 引脚 30 | AN4/RP20/RB4 — Analog input 4 / I/O port B4 |
| 引脚 31 | AVSS — Analog ground |
| 引脚 32 | AVDD — Analog supply (2.3V-3.6V) |
| 引脚 33 | AN3/RP19/RB3 — Analog input 3 / I/O port B3 (alt) |
| 引脚 34 | AN2/RP18/RB2 — Analog input 2 / I/O port B2 (alt) |
| 引脚 35 | AN1/RP17/RB1 — Analog input 1 / I/O port B1 (alt) |
| 引脚 36 | AN0/RP16/RB0 — Analog input 0 / I/O port B0 (alt) |
| 引脚 37 | VREF-/CVREF-/AN15 — ADC negative reference / analog input 15 |
| 引脚 38 | VREF+/CVREF+/AN14 — ADC positive reference / analog input 14 |
| 引脚 39 | SDA1/RP9/RD9 — I2C data 1 / I/O port D9 |
| 引脚 40 | SCL1/RP8/RD8 — I2C clock 1 / I/O port D8 |
| 引脚 41 | SOSCI/RP13/RB13 — Secondary oscillator input / I/O port B13 |
| 引脚 42 | SOSCO/RP14/RB14 — Secondary oscillator output / I/O port B14 |
| 引脚 43 | D-/RG3 — USB D- data line |
| 引脚 44 | D+/RG2 — USB D+ data line |
| 引脚 45 | VUSB — USB transceiver supply (3.3V) |
| 引脚 46 | OSC1/RC12 — Primary oscillator input |
| 引脚 47 | OSC2/RC15 — Primary oscillator output |
| 引脚 48 | VSS — Ground reference |
| 引脚 49 | TDI/RPA8/RA8 — JTAG test data in / I/O port A8 |
| 引脚 50 | TCK/RPA9/RA9 — JTAG test clock / I/O port A9 |
| 引脚 51 | TDO/RPA10/RA10 — JTAG test data out / I/O port A10 |
| 引脚 52 | TMS/RPA7/RA7 — JTAG test mode select / I/O port A7 |
| 引脚 53 | TRST/RPA6/RA6 — JTAG test reset / I/O port A6 |
| 引脚 54 | U1RTS/RF13/RF13 — UART1 RTS / I/O port F13 |
| 引脚 55 | U1RX/RF12/RF12 — UART1 RX / I/O port F12 |
| 引脚 56 | U1TX/RF8/RF8 — UART1 TX / I/O port F8 |
| 引脚 57 | U1CTS/RF5/RF5 — UART1 CTS / I/O port F5 |
| 引脚 58 | PMCS1/RG1/RG1 — PMP chip select 1 / I/O port G1 |
| 引脚 59 | PMCS2/RG0/RG0 — PMP chip select 2 / I/O port G0 |
| 引脚 60 | PMWR/RG7/RG7 — PMP write strobe / I/O port G7 |
| 引脚 61 | PMRD/RG6/RG6 — PMP read strobe / I/O port G6 |
| 引脚 62 | PMA0/RE8/RE8 — PMP address 0 / I/O port E8 |
| 引脚 63 | PMALL/RG15/RG15 — PMP address latch low / I/O port G15 |
| 引脚 64 | PMALH/RG14/RG14 — PMP address latch high / I/O port G14 |
典型应用
PIC32MX340F256H-80V/PT 适用于 6 应用s: USB Human Interface Device (HID) Peripherals, Industrial Control Panel with Graphical LCD, USB-to-UART / USB-to-SPI Bridge Adapter, Data Acquisition Front End, Consumer Audio / Automation Hub, Embedded Web Server / IoT Gateway.
USB Human Interface Device (HID) Peripherals
The PIC32MX340F256H-80V/PT's integrated USB 2.0 full-speed controller and 256 KB Flash make it a strong fit for USB HID products such as keyboards, mice, gamepads, and custom input devices. The MCU's 80 MHz M4K core handles HID report parsing, debounce, and lighting effects at low CPU load, while 32 KB RAM comfortably buffers multi-endpoint traffic. Place a 1.5 kohm pull-up on D+ for full-speed enumeration; the on-chip transceiver eliminates external USB PHY cost. Firmware footprint for a typical composite HID is 30-45 KB Flash, leaving ample headroom in 256 KB.
推荐
Industrial Control Panel with Graphical LCD
With 53 I/Os and a parallel master port (PMP), the PIC32MX340F256H-80V/PT directly drives graphical LCDs up to QVGA resolution without external controllers. The 80 MHz core renders menus, fonts, and bitmaps at smooth frame rates while DMA offloads PMP pixel transfers. The 2.3-3.6 V supply range tolerates noisy 24V industrial rails stepped down through a linear or buck regulator. The -105C temperature grade supports outdoor panels and factory floors. Use the internal RTCC for time-stamped event logging.
推荐
USB-to-UART / USB-to-SPI Bridge Adapter
The PIC32MX340F256H-80V/PT's USB device stack plus its multiple UART, SPI, and I2C peripherals make it ideal for compact USB bridge adapters used in factory programming and debug fixtures. The MCU emulates common bridge protocols (CDC ACM, vendor-class bulk) while exposing up to 4 UART/SPI ports to the host side. Bus-powered designs are simple because the part draws under 50 mA at 80 MHz. Flash headroom supports dual-role firmware, allowing field upgrade via USB DFU without external programmer.
推荐
Data Acquisition Front End
The 10-bit 1 Msps ADC, DMA controller, and 256 KB Flash position the PIC32MX340F256H-80V/PT as a competent multi-channel data logger. The 32 KB RAM buffers 16 ksamples at full ADC throughput, while DMA streams conversions to RAM without CPU intervention, leaving the M4K core free for averaging, peak detection, and SD card writes. Reference designs use the parallel master port with external SRAM for longer captures. The wide -40C to +105C range supports chassis-mounted instrumentation.
推荐
Consumer Audio / Automation Hub
The PIC32MX340F256H-80V/PT runs custom audio decoding (MP3, AAC, ADPCM) and home automation stacks simultaneously, leveraging its 80 MHz CPU for software codecs and ample Flash for protocol firmware (Zigbee, BLE-via-host, Modbus). The I2S peripheral can drive external DACs for compact speaker designs. Five UART channels handle concurrent RS-485, RS-232, and DMX links. Cost-optimized designs skip external RAM by using the 32 KB on-chip SRAM for ping-pong audio buffers.
推荐
Embedded Web Server / IoT Gateway
The PIC32MX340F256H-80V/PT's TCP/IP stack support (via Microchip's MPLAB Harmony Net Service) and 80 MHz CPU enable lightweight HTTP/MQTT servers on the MCU itself. The 256 KB Flash accommodates the TCP/IP stack plus a small web UI; 32 KB RAM supports several concurrent sockets. The USB host port allows Wi-Fi dongles for wireless connectivity. Engineers often pair this MCU with an external Ethernet PHY for wired IoT bridges.
推荐
推荐产品汇总
工程参考数据： PIC32MX340F256H-80V/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC32MX340F256H-80I/PT | PIC32MX340F256HT-80V/PT | PIC32MX340F128H-80I/PT | PIC32MX340F128HT-80V/PT |
|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10x1 mm) | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 256 KB | 256 KB (same) | 256 KB (same) | 128 KB (-50%) | 128 KB (-50%) |
| RAM Size | 32 KB | 32 KB (same) | 32 KB (same) | 32 KB (same) | 32 KB (same) |
| Max CPU Frequency | 80 MHz | 80 MHz (same) | 80 MHz (same) | 80 MHz (same) | 80 MHz (same) |
| Operating Temperature | -40C to +105C | -40C to +85C (-20C upper limit) | -40C to +105C (same) | -40C to +85C | -40C to +105C |
| USB 2.0 FS | Yes (device/host/OTG) | Yes (same) | Yes (same) | Yes (same) | Yes (same) |
| Unit Price (1000-pc reel) | $4.40 | $4.20 (approx) | $4.40 (same) | $3.80 (approx) | $3.80 (approx) |
关键差异点
- Extended temperature range (-40C to +105C) over the -I grade counterpart （对比 PIC32MX340F256H-80I/PT)
- Reel packaging variant available with same die （对比 PIC32MX340F256HT-80V/PT)
- Full 256 KB Flash at same package, lower price tier （对比 PIC32MX340F128H-80V/PT)
设计说明
Estimated: at 80 MHz with full USB activity, the PIC32MX340F256H draws approximately 50-70 mA from a 3.3 V rail. Provide a 3.3V LDO with at least 100 mA headroom and a 10 uF bulk capacitor near the VDD pins. The VCAP pin (pin 15) requires a 4.7 uF low-ESR ceramic bypass capacitor to VSS to stabilize the internal 1.8V core regulator; do not omit this part or the MCU will brown-out under high CPU load.
Keep USB D+/D- traces matched within 2 mm length difference and 90 ohm differential impedance per USB 2.0 FS spec. Place the 15 kohm pull-down resistors on D+/D- close to the MCU pins. Decouple each VDD pin with a 0.1 uF X7R ceramic placed within 3 mm, plus one 10 uF bulk per supply domain. Route crystal traces (OSC1/OSC2) short and ground-guarded to avoid EMI.
Do not skip configuring the peripheral pin select (PPS) registers in firmware - many pins default to general-purpose I/O and require explicit PPS mapping to peripheral functions. Reserve roughly 30-40 KB Flash for the USB stack when using the Microchip USB framework. The VUSB pin (45) requires a 0.47 uF decoupling capacitor; without it, USB enumeration may fail intermittently.
合规信息
RoHS compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - this part targets industrial rather than automotive-grade applications. Lead-free matte-tin finish per JEDEC J-STD-020.
