PIC16LF1455-I/ST - 14KB Flash 48MHz USB MCU 14-TSSOP | Microchip
MPN: PIC16LF1455-I/ST ✓ Hoạt độngPIC16LF1455-I/ST Tóm tắt
What is a PIC16F1455? It is a member of Microchip's enhanced mid-range 8-bit PIC16 microcontroller family, which bridges legacy baseline PIC cores and modern XLP (eXtreme Low Power) products. PIC16 microcontrollers use a Harvard RISC architecture optimized for deterministic interrupt latency and ultra-low power consumption; the 'LF' prefix denotes the low-voltage/foundry variant that supports lower Vdd operation, while the integrated USB 2.0 Full-Speed peripheral with on-chip clock recovery eliminates the external 12/24 MHz crystal typically required for USB.
Key features that distinguish this part include the integrated USB 2.0 module (rare in this pin-count and price tier), self-read/write Flash with high-endurance HEF (High Endurance Flash) for data EEPROM emulation, 12-bit ADC with computation, multiple communication peripherals (I2C/SPI/EUSART), and the nanoWatt XLP sleep modes that allow battery-powered designs. The 14-pin TSSOP gives designers 12 usable I/O lines while keeping the board footprint compact.
Architecturally, the PIC16F1455 uses a 14-bit instruction word, a single-cycle ALU with hardware multiply, and a 49-instruction set; the integrated USB SIE (Serial Interface Engine) handles packet framing and NRZI encoding without CPU intervention. The internal 48 MHz oscillator with 0.25% calibration supports USB Full-Speed operation directly, while a PLL derives the 48 MHz USB clock from lower-frequency sources.
Typical applications include low-cost USB HID/CDC devices, USB-to-UART bridges, battery-powered sensor nodes with USB charging/diagnostic interfaces, LED lighting controllers, and consumer peripherals. The combination of USB, ADC, and PWM makes it a frequent choice for human-interface and connectivity products.
Design consideration: USB designs must follow USB-IF signal-integrity guidelines - place the 0.1 uF Vbus decoupling capacitor within 2 mm of the VUSB pin and ensure the D+/D- traces are 90 ohm differential with no stubs. The internal 48 MHz oscillator eliminates one external component but does not allow fine-tuning for non-USB timings.
This page synthesizes distributor stock levels, drop-in alternatives, and applied design notes that go beyond the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF1455-I/ST — 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 PIC16LF1455-I/ST (cùng hình factor và footprint) — khác nhau ở USB Module, I/O Pins, Package, Operating Temperature, Communication Peripherals.
PIC16F1455-I/ST
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F1454-I/ST
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1454-I/ST
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1455-I/SL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF1455-I/P
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Xem tài liệu →PIC16LF1455-I/ST Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 enhanced mid-range 8-bit RISC |
| Instruction Set Size | 49 instructions |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data RAM | 1024 bytes |
| Non-volatile Data Storage (HEF) | 128 bytes |
| Stack Depth | 16 levels |
| Maximum CPU Speed | 48 MHz |
| Operating Voltage (LF suffix) | 2.3 V to 5.5 V |
| USB Module | USB 2.0 Full-Speed with on-chip clock recovery |
| I/O Pins | 12 |
| Communication Peripherals | I2C, SPI, EUSART, USB |
| Operating Temperature (I suffix) | -40 C to +85 C industrial |
| Hộp | 14-pin TSSOP (ST) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (per JEDEC J-STD-020) |
| Trạng thái RoHS | Compliant |
| Lead-Free (Pb-free) | Yes |
| AEC-Q100 Automotive | Not qualified (industrial grade) |
Cấu hình chân PIC16LF1455-I/ST
| Chân 1 | VDD — Positive supply voltage (2.3 V to 5.5 V) |
| Chân 2 | RA5 — Bidirectional I/O pin, digital only on this device |
| Chân 3 | RA4 — Bidirectional I/O / analog channel |
| Chân 4 | RA3/MCLR/VPP — Input only / Master Clear (reset, active low) / programming voltage |
| Chân 5 | RC5 — Bidirectional I/O / analog channel |
| Chân 6 | RC4/D- — Bidirectional I/O / USB D- (differential data line) |
| Chân 7 | RB5/D+ — Bidirectional I/O / USB D+ (differential data line) |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RA2/OSC1/CLKI — Bidirectional I/O / external clock input / crystal oscillator input |
| Chân 10 | RA1/OSC2/CLKO — Bidirectional I/O / crystal oscillator output / clock output |
| Chân 11 | RC0 — Bidirectional I/O / analog channel |
| Chân 12 | RC1 — Bidirectional I/O / analog channel |
| Chân 13 | RC2 — Bidirectional I/O / analog channel |
| Chân 14 | RC3 — Bidirectional I/O / analog channel |
Ứng dụng tiêu biểu
PIC16LF1455-I/ST phù hợp cho 6 Áp dụngs: USB HID Device / USB Keyboard / Mouse, USB-to-UART Bridge / Virtual COM Port, Battery-Powered Sensor Node with USB Diagnostic, USB LED Lighting Controller / WS2812 Strip Driver, USB Bootloader / Firmware Update Dongle, Consumer USB Peripheral / Toy Interface.
USB HID Device / USB Keyboard / Mouse
The PIC16LF1455-I/ST is ideal for low-cost USB HID devices because its integrated USB 2.0 Full-Speed Serial Interface Engine (SIE) handles NRZI encoding, bit stuffing, and packet framing entirely in hardware, freeing the 8-bit CPU to service the human-interface application. The internal 48 MHz HFINTOSC with on-chip clock recovery from USB host eliminates the 12/24 MHz crystal typically required, reducing BOM cost by $0.30+ and PCB area. The 14 KB Flash comfortably fits USB HID class descriptors, scan-matrix handling, and Caps Lock / Num Lock LED drive firmware. Combined with 12 I/O pins and nanoWatt XLP sleep modes below 50 nA, this part is a frequent choice for USB keyboards, mice, game controllers, and consumer HID peripherals in the 2.3-5.5 V supply range. Unlike VBUS-powered designs that need a regulator, the LF1455 can run directly from VBUS at 5 V while drawing milliwatts.
Được đề xuất
USB-to-UART Bridge / Virtual COM Port
The PIC16LF1455-I/ST is widely used as a USB-to-UART bridge (CDC class device) because the integrated USB module plus on-chip EUSART create a turnkey virtual COM port without external components. The 49-instruction PIC16 core handles USB CDC enumeration and EUSART baud-rate generation with cycle-accurate timing, while 1024 B RAM is sufficient for line-edit buffers and 128 B HEF holds persistent baud-rate and protocol settings. The TSSOP-14 footprint and 2.3 V VDD minimum allow operation from USB VBUS (5 V) or a 3.3 V regulator rail, giving designers flexibility for industrial adapter dongles. Designers should add 90 ohm differential routing on D+/D- lines and a 0.1 uF VUSB bypass capacitor within 2 mm of the pin, per Microchip USB design guidelines.
Được đề xuất
Battery-Powered Sensor Node with USB Diagnostic
The PIC16LF1455-I/ST suits battery-powered sensor nodes that occasionally connect via USB for diagnostics or charging because the nanoWatt XLP technology delivers sub-50 nA sleep current with watchdog disabled, and the integrated USB module provides diagnostic connectivity without a separate interface IC. The 12-bit ADC (computation-averaging capable) handles analog sensor channels while 14 KB Flash holds sensor-fusion and USB stack firmware. At 3.3 V operation the LF1455 draws only a few milliamps during active USB enumeration, allowing direct battery connection. Pin-count of 12 I/O is sufficient for typical 4-8 sensor channels plus status LEDs.
Được đề xuất
USB LED Lighting Controller / WS2812 Strip Driver
The PIC16LF1455-I/ST is a common choice for USB-controlled LED lighting because the integrated USB allows PC-based color and pattern control, while the 48 MHz CPU clock provides the precise 800 kbps / 400 kbps WS2812 / WS2811 timing required for addressable RGB LED strips. The 14 KB Flash fits USB class stacks plus WS2812 driver libraries, and 12 I/O can drive multiple LED data lines simultaneously. The 2.3 V VDD minimum supports direct 3.3 V or 5 V operation, allowing the MCU to share the LED strip's power rail without a separate regulator.
Được đề xuất
USB Bootloader / Firmware Update Dongle
The PIC16LF1455-I/ST is well-suited as a USB bootloader host that re-flashes downstream PIC microcontrollers in production because the integrated USB device interface enumerates as a HID or vendor-class bootloader, while the on-chip EUSART or ICSP pins drive target MCU programming. The 14 KB Flash holds the bootloader application plus a small command interpreter, and the HEF (high-endurance Flash) 128-byte area stores last-known-good firmware pointers across bootloader updates. The TSSOP-14 industrial temperature range (-40C to +85C) covers field deployment scenarios.
Được đề xuất
Consumer USB Peripheral / Toy Interface
The PIC16LF1455-I/ST is frequently selected for consumer USB peripherals and electronic toys because of its sub-$2 unit pricing, integrated USB 2.0 Full-Speed, and 14-pin TSSOP that fits inside compact enclosures. The PIC16 enhanced mid-range core runs deterministic 8-bit code at 48 MHz, sufficient for sensor polling, button debouncing, and USB HID reports. The 128-byte HEF storage area holds user preferences or game-state data across power cycles, and the XLP sleep mode extends battery life in portable toys. Designers use the LF1455 for USB-connected learning devices, game controllers, and PC peripherals.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF1455-I/ST — 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 | PIC16F1455-I/ST | PIC16F1454-I/ST | PIC16LF1454-I/ST | PIC16LF1455-I/SL | PIC16LF1455-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP (ST) | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-SOIC (different footprint, same pin count) | 14-PDIP through-hole (different footprint, same pin count) |
| Flash Memory | 14 KB | 14 KB | 8 KB (-43%) | 8 KB (-43%) | 14 KB | 14 KB |
| Data RAM | 1024 bytes | 1024 bytes | 512 bytes (-50%) | 512 bytes (-50%) | 1024 bytes | 1024 bytes |
| Minimum VDD | 2.3 V (LF) | 1.8 V (lower) | 1.8 V (lower) | 2.3 V (same) | 2.3 V (same) | 2.3 V (same) |
| USB Module | USB 2.0 Full-Speed with clock recovery | USB 2.0 Full-Speed with clock recovery | USB 2.0 Full-Speed with clock recovery | USB 2.0 Full-Speed with clock recovery | USB 2.0 Full-Speed with clock recovery | USB 2.0 Full-Speed with clock recovery |
| Maximum CPU Speed | 48 MHz (12 MIPS) | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Temperature (I suffix) | -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 |
| Qty-1 Price (USD, 2026-09-22) | $2.07 | $2.07 (approx) | $1.80 (approx, lower) | $1.80 (approx, lower) | $2.10 (approx, similar) | $2.20 (approx, similar) |
Bảo phân biệt quan trọng
- Lower 2.3 V minimum VDD operation (vsPIC16F1455-I/ST)
- Higher Flash density at this pin-count tier (vsPIC16F1454-I/ST)
- TSSOP-14 surface-mount footprint for compact designs (vsPIC16LF1455-I/P (PDIP-14))
Ghi chú thiết kế
USB Full-Speed design requires careful PCB layout: route the D+ and D- lines as a 90 ohm differential pair with no stubs, keep them on the same layer, and place the 0.1 uF VUSB decoupling capacitor within 2 mm of the VUSB pin. Place a ferrite bead or 10 ohm resistor in series with VBUS to suppress ESD transients, and avoid routing D+/D- near clock traces or switching regulator nodes that could inject common-mode noise exceeding USB-IF masks.
The PIC16LF1455 needs a 1 kohm pull-up resistor on D+ (or D- for low-speed) to signal USB host connection - omitting this is the #1 cause of 'device not recognized' errors. The MCLR/RA3 pin defaults to MCLR mode after reset; to use it as a digital input, program the MCLRE configuration bit to 0 in CONFIG1. Do not exceed the absolute maximum VDD of 6.5 V, and ensure VDD rise time is < 300 ms to avoid incomplete Flash program cycles.
The 14-pin TSSOP package has a typical thermal resistance (theta_JA) of approximately 100 C/W when mounted on a JEDEC EIA/JESD51 4-layer test board; under typical USB enumeration loads (around 30 mA peak), self-heating is negligible. In enclosed USB dongle designs without airflow, derate to 70% of maximum temperature rise to account for thermal coupling to the USB connector and housing.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial grade (-40C to +85C) only - automotive grade variants have an -E or -F suffix and would require a separate part number. Halogen-free status not confirmed in this data set.
