PIC32MX450F256LT-V/TL - 80MHz 32-bit MCU 256KB Flash | Microchip
MPN: PIC32MX450F256LT-V/TL ✓ Hoạt độngPIC32MX450F256LT-V/TL Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX450F256LT-V/TL — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC32MX450F256LT-V/TL (cùng hình factor và footprint) — khác nhau ở ADC, Package, USB, Core Architecture, RTCC.
PIC32MX450F256L-V/TL
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX450F256LT-I/TL
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX450F256L-120/TL
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX450F256L-I/TL
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX450F256LT-V/PF
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX450F256LT-V/TL Tỷ lệ tối đa & tính chất điện
| 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 |
| Số chân | 124 |
| Hộp | 124-VTLA (Very Thin Leadless Array) with exposed pad |
| Nhiệt độ hoạt động | -40C to +105C (V-temp) |
| Điện áp cung cấp | 2.3V to 3.6V |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC32MX450F256LT-V/TL
| Chân 1 | RA0 — General purpose I/O / analog input / CTMU |
| Chân 2 | RA1 — General purpose I/O / analog input / CTMU |
| Chân 3 | RA2 — General purpose I/O / analog input |
| Chân 4 | RA3 — General purpose I/O / analog input |
| Chân 5 | RA4 — General purpose I/O / analog input |
| Chân 6 | RA5 — General purpose I/O / analog input |
| Chân 7 | RA6 — General purpose I/O |
| Chân 8 | RA7 — General purpose I/O |
| Chân 9 | RB0 — General purpose I/O / programming |
| Chân 10 | RB1 — General purpose I/O |
| Chân 11 | RB2 — General purpose I/O |
| Chân 12 | RB3 — General purpose I/O |
| Chân 13 | RB4 — General purpose I/O |
| Chân 14 | RB5 — General purpose I/O |
| Chân 15 | RB6 — General purpose I/O |
| Chân 16 | RB7 — General purpose I/O |
| Chân 17 | RC1 — General purpose I/O |
| Chân 18 | RC2 — General purpose I/O |
| Chân 19 | RC3 — General purpose I/O |
| Chân 20 | RC4 — General purpose I/O |
| Chân 21 | VSS — Ground |
| Chân 22 | VDD — Power supply 2.3V-3.6V |
| Chân 23 | RD0 — General purpose I/O |
| Chân 24 | RD1 — General purpose I/O |
| Chân 25 | RD2 — General purpose I/O |
| Chân 26 | RD3 — General purpose I/O |
| Chân 27 | RD4 — General purpose I/O |
| Chân 28 | RD5 — General purpose I/O |
| Chân 29 | RD6 — General purpose I/O |
| Chân 30 | RD7 — General purpose I/O |
| Chân 31 | RE0 — General purpose I/O |
| Chân 32 | RE1 — General purpose I/O |
| Chân 33 | RE2 — General purpose I/O |
| Chân 34 | RE3 — General purpose I/O |
| Chân 35 | RE4 — General purpose I/O |
| Chân 36 | RE5 — General purpose I/O |
| Chân 37 | RE6 — General purpose I/O |
| Chân 38 | RE7 — General purpose I/O |
| Chân 39 | RF0 — General purpose I/O |
| Chân 40 | RF1 — General purpose I/O |
| Chân 41 | RF2 — General purpose I/O |
| Chân 42 | RF3 — General purpose I/O |
| Chân 43 | RF4 — General purpose I/O |
| Chân 44 | RF5 — General purpose I/O |
| Chân 45 | RF6 — General purpose I/O |
| Chân 46 | RF7 — General purpose I/O |
| Chân 47 | RG0 — General purpose I/O |
| Chân 48 | RG1 — General purpose I/O |
| Chân 49 | RG2 — General purpose I/O |
| Chân 50 | RG3 — General purpose I/O |
| Chân 51 | RG6 — General purpose I/O |
| Chân 52 | RG7 — General purpose I/O |
| Chân 53 | RG8 — General purpose I/O |
| Chân 54 | RG9 — General purpose I/O |
| Chân 55 | VSS — Ground |
| Chân 56 | VDD — Power supply 2.3V-3.6V |
| Chân 57 | RH0 — General purpose I/O |
| Chân 58 | RH1 — General purpose I/O |
| Chân 59 | RH2 — General purpose I/O |
| Chân 60 | RH3 — General purpose I/O |
| Chân 61 | RH4 — General purpose I/O |
| Chân 62 | RH5 — General purpose I/O |
| Chân 63 | RH6 — General purpose I/O |
| Chân 64 | RH7 — General purpose I/O |
| Chân 65 | RJ0 — General purpose I/O |
| Chân 66 | RJ1 — General purpose I/O |
| Chân 67 | RJ2 — General purpose I/O |
| Chân 68 | RJ3 — General purpose I/O |
| Chân 69 | RJ4 — General purpose I/O |
| Chân 70 | RJ5 — General purpose I/O |
| Chân 71 | RJ6 — General purpose I/O |
| Chân 72 | RJ7 — General purpose I/O |
| Chân 73 | VSS — Ground |
| Chân 74 | VDD — Power supply 2.3V-3.6V |
| Chân 75 | RK0 — General purpose I/O |
| Chân 76 | RK1 — General purpose I/O |
| Chân 77 | RK2 — General purpose I/O |
| Chân 78 | RK3 — General purpose I/O |
| Chân 79 | RK4 — General purpose I/O |
| Chân 80 | RK5 — General purpose I/O |
| Chân 81 | RK6 — General purpose I/O |
| Chân 82 | RK7 — General purpose I/O |
| Chân 83 | RL0 — General purpose I/O |
| Chân 84 | RL1 — General purpose I/O |
| Chân 85 | RL2 — General purpose I/O |
| Chân 86 | RL3 — General purpose I/O |
| Chân 87 | RL4 — General purpose I/O |
| Chân 88 | RL5 — General purpose I/O |
| Chân 89 | RL6 — General purpose I/O |
| Chân 90 | RL7 — General purpose I/O |
| Chân 91 | VSS — Ground |
| Chân 92 | VDD — Power supply 2.3V-3.6V |
| Chân 93 | OSC1 — Crystal oscillator input |
| Chân 94 | OSC2 — Crystal oscillator output |
| Chân 95 | SOSC1 — Secondary low-power oscillator input |
| Chân 96 | SOSC2 — Secondary low-power oscillator output |
| Chân 97 | VREF- — ADC voltage reference negative |
| Chân 98 | VREF+ — ADC voltage reference positive |
| Chân 99 | AVDD — Analog power supply |
| Chân 100 | AVSS — Analog ground |
| Chân 101 | D+ — USB data plus |
| Chân 102 | D- — USB data minus |
| Chân 103 | VBUS — USB VBUS detect |
| Chân 104 | MCLR — Master clear reset |
| Chân 105 | PGEC1 — ICSP programming clock |
| Chân 106 | PGED1 — ICSP programming data |
| Chân 107 | PGEC2 — Trace/ICSP clock |
| Chân 108 | PGED2 — Trace/ICSP data |
| Chân 109 | RTCC — Real-time clock calendar alarm |
| Chân 110 | SDA1 — I2C1 data |
| Chân 111 | SCL1 — I2C1 clock |
| Chân 112 | SDA2 — I2C2 data |
| Chân 113 | SCL2 — I2C2 clock |
| Chân 114 | SDO1 — SPI1 data out |
| Chân 115 | SDI1 — SPI1 data in |
| Chân 116 | SCK1 — SPI1 clock |
| Chân 117 | SS1 — SPI1 slave select |
| Chân 118 | SDO2 — SPI2 data out |
| Chân 119 | SDI2 — SPI2 data in |
| Chân 120 | SCK2 — SPI2 clock |
| Chân 121 | SS2 — SPI2 slave select |
| Chân 122 | U1TX — UART1 transmit |
| Chân 123 | U1RX — UART1 receive |
| Chân 124 | EP — Exposed thermal pad - connect to VSS |
Ứng dụng tiêu biểu
PIC32MX450F256LT-V/TL phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX450F256LT-V/TL — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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) |
Bảo phân biệt quan trọng
- Integrated USB OTG PHY eliminates external transceiver (vsPIC32MX340F128H-80V/MR)
- Higher clock headroom with -120 sibling variants (vsPIC32MX450F256L-120/TL)
- Industrial-grade V-temp vs I-temp for cost-sensitive designs (vsPIC32MX450F256LT-I/TL)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
