PIC32MX450F256LT-V/TL - 80MHz 32-bit MCU 256KB Flash | Microchip
料号： PIC32MX450F256LT-V/TL ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.87 | $6.87 |
| 10 | $6.18 | $61.80 |
| 100 | $5.49 | $549.00 |
| 500 | $4.94 | $2,470.00 |
| 1,000 | $4.39 | $4,390.00 |
PIC32MX450F256LT-V/TL 概述
A 32-bit microcontroller (MCU) is a programmable integrated circuit that combines a high-performance processor core, program memory (Flash), data memory (SRAM), and a rich set of on-chip peripherals in a single silicon die. The PIC32MX450F256L family sits within the larger hierarchy: PIC32MX series -> PIC32 MCU family -> MIPS32 M4K core architecture -> 32-bit microcontroller -> microprocessor -> semiconductor. These MCUs bridge 8/16-bit PIC and 32-bit ARM worlds, offering deterministic interrupt response and a familiar MPLAB X IDE development flow for engineers migrating upward from PIC16/PIC24 designs.
Key features include 256KB Flash (256K x 8), 64KB RAM, USB 2.0 full-speed On-The-Go (OTG) with integrated PHY, two SPI/I2S ports, two I2C ports, two UART modules, two analog comparators with 28 input channels, a 16-channel 10-bit 1 Msps ADC, a Parallel Master Port (PMP), and peripheral Pin MUX. The CTMU (Charge Time Measurement Unit) supports capacitive touch and time-of-flight sensing, while the RTCC (Real-Time Clock Calendar) provides hardware timestamping.
Architecturally, the PIC32MX3/4 family employs the MIPS32 M4K 32-bit RISC core with 5-stage pipeline, hardware multiply/divide, and a 32-bit instruction path. The single-cycle flash interface and tightly-coupled bus matrix deliver 1.62 DMIPS/MHz (approximately 130 DMIPS at 80MHz). The integrated USB 2.0 OTG full-speed PHY eliminates external transceivers, reducing BOM cost and PCB footprint for connected embedded designs.
Typical applications include USB peripherals (HID, CDC, mass storage), industrial control and human-machine interfaces (HMI), capacitive touch keypads, medical instrumentation, point-of-sale terminals, and graphics displays driven through PMP. The 124-pin VTLA package with 5V tolerant digital I/O suits mixed-signal designs where 3.3V logic meets 5V sensors or relays.
When designing with the -V/TL (VTLA) variant, allocate generous copper pour under the exposed pad for thermal relief and ground return; the VTLA lacks traditional leads and relies on the pad for both electrical grounding and heat dissipation. Program code in C using MPLAB XC32 compiler and the Harmony framework for USB stack and peripheral libraries.
直接替换替代料： PIC32MX450F256LT-V/TL ——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： PIC32MX450F256LT-V/TL （相同外形与封装尺寸） ——差异在于 ADC, Package, USB, Core Architecture, RTCC.
快速对比工具——选择替代料号进行并排对比：
PIC32MX450F256L-V/TL
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC32MX450F256LT-I/TL
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.78 / 个
查看数据手册 →PIC32MX450F256L-120/TL
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.48 / 个
查看数据手册 →PIC32MX450F256L-I/TL
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$6.2 / 个
查看数据手册 →PIC32MX450F256LT-V/PF
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.49 / 个
查看数据手册 →PIC32MX450F256LT-V/TL 最大额定值与电气特性
| Core | MIPS32 M4K 32-bit RISC |
| Max CPU Speed | 80 MHz |
| Flash Program Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| USB | USB 2.0 OTG Full-Speed with integrated PHY |
| SPI/I2S | 2 |
| I2C | 2 |
| UART | 2 |
| ADC | 10-bit, 1 Msps, 16 channels |
| Analog Comparators | 2 (28 input channels) |
| CTMU | Yes (Capacitive Touch, time-of-flight) |
| RTCC | Yes (Real-Time Clock Calendar) |
| PMP | Yes (Parallel Master Port) |
| DMA | Yes |
| 引脚数量 | 124 |
| 封装 | 124-VTLA (Very Thin Leadless Array) with exposed pad |
| 工作温度 | -40C to +105C (V-temp) |
| 电源电压 | 2.3V to 3.6V |
| 安装类型 | Surface Mount |
| MSL 等级 | 3 (168 hours) |
| RoHS 状态 | Compliant |
PIC32MX450F256LT-V/TL 引脚配置
| 引脚 1 | RA0 — General purpose I/O / analog input / CTMU |
| 引脚 2 | RA1 — General purpose I/O / analog input / CTMU |
| 引脚 3 | RA2 — General purpose I/O / analog input |
| 引脚 4 | RA3 — General purpose I/O / analog input |
| 引脚 5 | RA4 — General purpose I/O / analog input |
| 引脚 6 | RA5 — General purpose I/O / analog input |
| 引脚 7 | RA6 — General purpose I/O |
| 引脚 8 | RA7 — General purpose I/O |
| 引脚 9 | RB0 — General purpose I/O / programming |
| 引脚 10 | RB1 — General purpose I/O |
| 引脚 11 | RB2 — General purpose I/O |
| 引脚 12 | RB3 — General purpose I/O |
| 引脚 13 | RB4 — General purpose I/O |
| 引脚 14 | RB5 — General purpose I/O |
| 引脚 15 | RB6 — General purpose I/O |
| 引脚 16 | RB7 — General purpose I/O |
| 引脚 17 | RC1 — General purpose I/O |
| 引脚 18 | RC2 — General purpose I/O |
| 引脚 19 | RC3 — General purpose I/O |
| 引脚 20 | RC4 — General purpose I/O |
| 引脚 21 | VSS — Ground |
| 引脚 22 | VDD — Power supply 2.3V-3.6V |
| 引脚 23 | RD0 — General purpose I/O |
| 引脚 24 | RD1 — General purpose I/O |
| 引脚 25 | RD2 — General purpose I/O |
| 引脚 26 | RD3 — General purpose I/O |
| 引脚 27 | RD4 — General purpose I/O |
| 引脚 28 | RD5 — General purpose I/O |
| 引脚 29 | RD6 — General purpose I/O |
| 引脚 30 | RD7 — General purpose I/O |
| 引脚 31 | RE0 — General purpose I/O |
| 引脚 32 | RE1 — General purpose I/O |
| 引脚 33 | RE2 — General purpose I/O |
| 引脚 34 | RE3 — General purpose I/O |
| 引脚 35 | RE4 — General purpose I/O |
| 引脚 36 | RE5 — General purpose I/O |
| 引脚 37 | RE6 — General purpose I/O |
| 引脚 38 | RE7 — General purpose I/O |
| 引脚 39 | RF0 — General purpose I/O |
| 引脚 40 | RF1 — General purpose I/O |
| 引脚 41 | RF2 — General purpose I/O |
| 引脚 42 | RF3 — General purpose I/O |
| 引脚 43 | RF4 — General purpose I/O |
| 引脚 44 | RF5 — General purpose I/O |
| 引脚 45 | RF6 — General purpose I/O |
| 引脚 46 | RF7 — General purpose I/O |
| 引脚 47 | RG0 — General purpose I/O |
| 引脚 48 | RG1 — General purpose I/O |
| 引脚 49 | RG2 — General purpose I/O |
| 引脚 50 | RG3 — General purpose I/O |
| 引脚 51 | RG6 — General purpose I/O |
| 引脚 52 | RG7 — General purpose I/O |
| 引脚 53 | RG8 — General purpose I/O |
| 引脚 54 | RG9 — General purpose I/O |
| 引脚 55 | VSS — Ground |
| 引脚 56 | VDD — Power supply 2.3V-3.6V |
| 引脚 57 | RH0 — General purpose I/O |
| 引脚 58 | RH1 — General purpose I/O |
| 引脚 59 | RH2 — General purpose I/O |
| 引脚 60 | RH3 — General purpose I/O |
| 引脚 61 | RH4 — General purpose I/O |
| 引脚 62 | RH5 — General purpose I/O |
| 引脚 63 | RH6 — General purpose I/O |
| 引脚 64 | RH7 — General purpose I/O |
| 引脚 65 | RJ0 — General purpose I/O |
| 引脚 66 | RJ1 — General purpose I/O |
| 引脚 67 | RJ2 — General purpose I/O |
| 引脚 68 | RJ3 — General purpose I/O |
| 引脚 69 | RJ4 — General purpose I/O |
| 引脚 70 | RJ5 — General purpose I/O |
| 引脚 71 | RJ6 — General purpose I/O |
| 引脚 72 | RJ7 — General purpose I/O |
| 引脚 73 | VSS — Ground |
| 引脚 74 | VDD — Power supply 2.3V-3.6V |
| 引脚 75 | RK0 — General purpose I/O |
| 引脚 76 | RK1 — General purpose I/O |
| 引脚 77 | RK2 — General purpose I/O |
| 引脚 78 | RK3 — General purpose I/O |
| 引脚 79 | RK4 — General purpose I/O |
| 引脚 80 | RK5 — General purpose I/O |
| 引脚 81 | RK6 — General purpose I/O |
| 引脚 82 | RK7 — General purpose I/O |
| 引脚 83 | RL0 — General purpose I/O |
| 引脚 84 | RL1 — General purpose I/O |
| 引脚 85 | RL2 — General purpose I/O |
| 引脚 86 | RL3 — General purpose I/O |
| 引脚 87 | RL4 — General purpose I/O |
| 引脚 88 | RL5 — General purpose I/O |
| 引脚 89 | RL6 — General purpose I/O |
| 引脚 90 | RL7 — General purpose I/O |
| 引脚 91 | VSS — Ground |
| 引脚 92 | VDD — Power supply 2.3V-3.6V |
| 引脚 93 | OSC1 — Crystal oscillator input |
| 引脚 94 | OSC2 — Crystal oscillator output |
| 引脚 95 | SOSC1 — Secondary low-power oscillator input |
| 引脚 96 | SOSC2 — Secondary low-power oscillator output |
| 引脚 97 | VREF- — ADC voltage reference negative |
| 引脚 98 | VREF+ — ADC voltage reference positive |
| 引脚 99 | AVDD — Analog power supply |
| 引脚 100 | AVSS — Analog ground |
| 引脚 101 | D+ — USB data plus |
| 引脚 102 | D- — USB data minus |
| 引脚 103 | VBUS — USB VBUS detect |
| 引脚 104 | MCLR — Master clear reset |
| 引脚 105 | PGEC1 — ICSP programming clock |
| 引脚 106 | PGED1 — ICSP programming data |
| 引脚 107 | PGEC2 — Trace/ICSP clock |
| 引脚 108 | PGED2 — Trace/ICSP data |
| 引脚 109 | RTCC — Real-time clock calendar alarm |
| 引脚 110 | SDA1 — I2C1 data |
| 引脚 111 | SCL1 — I2C1 clock |
| 引脚 112 | SDA2 — I2C2 data |
| 引脚 113 | SCL2 — I2C2 clock |
| 引脚 114 | SDO1 — SPI1 data out |
| 引脚 115 | SDI1 — SPI1 data in |
| 引脚 116 | SCK1 — SPI1 clock |
| 引脚 117 | SS1 — SPI1 slave select |
| 引脚 118 | SDO2 — SPI2 data out |
| 引脚 119 | SDI2 — SPI2 data in |
| 引脚 120 | SCK2 — SPI2 clock |
| 引脚 121 | SS2 — SPI2 slave select |
| 引脚 122 | U1TX — UART1 transmit |
| 引脚 123 | U1RX — UART1 receive |
| 引脚 124 | EP — Exposed thermal pad - connect to VSS |
典型应用
PIC32MX450F256LT-V/TL 适用于 6 应用s: USB Peripherals and HID Devices, Capacitive Touch Keypads and HMI, Industrial Control and PLC Modules, Medical Instrumentation and Patient Monitors, Point-of-Sale (POS) Terminals and Printers, Graphics Displays with PMP Interface.
USB Peripherals and HID Devices
The PIC32MX450F256LT-V/TL is ideal for USB peripherals thanks to its integrated USB 2.0 OTG full-speed PHY, eliminating external transceivers and BOM cost. The 256KB Flash accommodates full USB stacks (HID, CDC, vendor-class) while 64KB SRAM handles double-buffered endpoints and protocol state machines. Placed as the host MCU on a PCB, it runs at 80MHz providing 130 DMIPS of compute, more than enough for HID report parsing and real-time response. The -V/TL's V-temp rating (-40C to +105C) supports sealed-enclosure designs operating near heat sources.
推荐
Capacitive Touch Keypads and HMI
The PIC32MX450F256LT-V/TL's integrated CTMU (Charge Time Measurement Unit) enables robust capacitive touch sensing without dedicated touch controllers. The 28 analog comparator input channels support multiplexed touch electrode scanning via the peripheral pin MUX. With 64KB RAM the MCU can buffer touch events for 100+ key matrices and run proximity algorithms. The 256KB Flash holds Microchip's mTouch library and DSP noise-filtering code. Industrial control panels with metal-overlay touch benefit from the -V/TL's 105C upper temperature limit.
推荐
Industrial Control and PLC Modules
The PIC32MX450F256LT-V/TL suits industrial PLC and remote I/O modules because of its 5V-tolerant digital I/O, RTCC for scheduled control tasks, and 16-channel 10-bit ADC for sensor readout. Operating from a 3.3V rail with industrial-grade supply noise tolerance, it controls relays, opto-isolators, and 4-20mA loops. The 80MHz MIPS M4K core executes PID loops deterministically. Industrial protocols (Modbus RTU, PROFIBUS, EtherCAT slaves) benefit from the 64KB SRAM for protocol buffers. The -V/TL temperature grade supports factory-floor enclosures.
推荐
Medical Instrumentation and Patient Monitors
The PIC32MX450F256LT-V/TL fits portable medical instrumentation such as pulse oximeters, blood pressure cuffs, and glucose meters. Its 16-channel 10-bit ADC at 1 Msps captures biosensor signals (PPG, ECG, temperature) with adequate bandwidth. The CTMU supports electrode impedance measurements. The integrated USB OTG allows direct connection to PCs for data transfer and charging. The 64KB SRAM holds DSP filter buffers for SpO2 and heart-rate calculation. The -V/TL V-temp grade covers typical medical operating environments.
推荐
Point-of-Sale (POS) Terminals and Printers
POS terminals benefit from the PIC32MX450F256LT-V/TL's integrated USB OTG, dual SPI for thermal printer heads, dual I2C for secure PIN pads, and PMP for character LCD or graphic displays. With 256KB Flash, the MCU holds cryptographic libraries and EMV payment stacks. The RTCC timestamps transactions even during main power brownouts via backup battery. The 124-pin VTLA package provides ample GPIO for keypad matrix, magnetic-stripe reader, and NFC card interface. The 64KB RAM supports full EMV transaction buffers.
推荐
Graphics Displays with PMP Interface
The PIC32MX450F256LT-V/TL drives small to mid-sized TFT LCD panels through its Parallel Master Port (PMP) at 80MHz, sufficient for QVGA (320x240) panels. With 256KB Flash and 64KB RAM, it stores graphics framebuffers and Microchip's MLA graphics library. The dual SPI/I2S ports support external flash for image storage. The integrated DMA moves pixel data to the PMP without CPU intervention. Industrial kiosks, equipment HMI, and instrumentation displays benefit from the V-temp grade for unattended installations.
推荐
推荐产品汇总
工程参考数据： PIC32MX450F256LT-V/TL ——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 | PIC32MX450F256L-V/TL | PIC32MX450F256LT-I/TL | PIC32MX450F256L-120/TL | PIC32MX450F256L-I/TL | PIC32MX450F256LT-V/PF |
|---|---|---|---|---|---|---|
| Package | 124-VTLA | 124-VTLA - same | 124-VTLA - same | 124-VTLA - same | 124-VTLA - same | 100-TQFP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Max CPU Speed | 80 MHz | 80 MHz | 80 MHz | 120 MHz (+50%) | 80 MHz | 80 MHz |
| Temperature Grade | V-temp -40C to +105C | V-temp -40C to +105C | I-temp -40C to +85C | V-temp -40C to +105C | I-temp -40C to +85C | V-temp -40C to +105C |
| USB OTG | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) |
| ADC | 10-bit, 16 ch, 1 Msps | 10-bit, 16 ch, 1 Msps | 10-bit, 16 ch, 1 Msps | 10-bit, 16 ch, 1 Msps | 10-bit, 16 ch, 1 Msps | 10-bit, 16 ch, 1 Msps |
| Unit Price (qty 1000) | $4.39 | Similar (T&R variant) | Lower (I-temp grade) | Higher (120MHz speed grade) | Lower (I-temp grade) | Similar (tray variant) |
关键差异点
- Integrated USB OTG PHY eliminates external transceiver （对比 PIC32MX340F128H-80V/MR)
- Higher clock headroom with -120 sibling variants （对比 PIC32MX450F256L-120/TL)
- Industrial-grade V-temp vs I-temp for cost-sensitive designs （对比 PIC32MX450F256LT-I/TL)
设计说明
The 124-VTLA package has no traditional leads; the central exposed pad (EP) MUST be soldered to a PCB land pattern for both electrical ground (VSS) and thermal dissipation. Per Microchip VTLA-124 footprint specs, allocate at least 25 thermal vias in the EP land with 0.3mm drill, stitched to a continuous ground plane on inner layers. Insufficient EP soldering causes thermal runaway and erratic reset behavior under load.
Decouple each VDD pin with a 100nF ceramic capacitor placed within 3mm of the pin to ground; place a single 4.7uF bulk capacitor near the package. Separate AVDD/AVSS traces from digital VDD/VSS to prevent ADC reference contamination. The USB VBUS pin requires a 5V-tolerant voltage divider (typically 22k/4.7k) for proper session detection.
Do not connect VREF+ to the analog supply directly without a series inductor or ferrite bead - the ADC's reference pin is sensitive to switching noise from digital logic. Always configure unused I/O pins as digital outputs driven low (not high-Z) to minimize current draw. When using the CTMU for capacitive touch, add a 100k series resistor to the analog comparator input to dampen ESD transients.
Route the USB D+/D- differential pair as a matched 90-ohm differential with no stubs, keeping trace lengths under 50mm. Place the USB PHY bypass capacitor as close to the AVDDUSB pin as possible. Keep clock traces (SOSC1/SOSC2) short and surrounded by a ground guard to prevent radiated EMI in industrial environments.
合规信息
RoHS and REACH compliance per Microchip product page. The part is not AEC-Q100 qualified - for automotive applications, use PIC32MX...Q parts or higher-tier PIC32MK automotive family.
