PIC16LF1454T-I/ST - 14KB Flash 8-bit MCU USB 2.0 | Microchip
料号： PIC16LF1454T-I/ST ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.5 | $1.50 |
| 10 | $1.4 | $14.00 |
| 100 | $1.32 | $132.00 |
| 500 | $1.2 | $600.00 |
| 1,000 | $1.1 | $1,100.00 |
PIC16LF1454T-I/ST 概述
A PIC microcontroller (Programmable Interface Controller) is a family of 8-bit RISC microcontrollers from Microchip Technology built on a Harvard architecture with separate program and data buses. Microcontrollers integrate a CPU, non-volatile Flash memory, RAM, EEPROM, and peripherals (ADC, timers, communications, I/O) on a single die. The PIC16F1xxx family adds enhanced peripherals such as USB, capacitive touch sensing, and multiple communication interfaces to the legacy mid-range PIC16 core. Within Microchip's hierarchy, PIC16LF1454 sits in the mid-range 8-bit MCU tier below the PIC18 and dsPIC families, optimized for ultra-low-power and USB-enabled embedded designs.
Key differentiating features include the integrated USB 2.0 full-speed transceiver (12 Mbps), which eliminates the need for external USB PHY components, and Microchip's nanoWatt XLP technology, which delivers sub-microamp sleep currents ideal for battery-backed or energy-harvesting applications. The device offers 7-channel 10-bit ADC, two PWM modules, I2C, SPI, and EUSART peripherals, plus an internal 48 MHz oscillator accurate to within +/-2% over the operating range. The 14-pin TSSOP package measures 4.4 mm wide and is rated for -40C to +85C industrial operation.
From an architectural standpoint, the PIC16LF1454 uses Microchip's enhanced mid-range core with 49 instructions and a 16-level hardware stack. The integrated 3.3V LDO voltage regulator on the VUSB pin can supply up to 200 mA to external circuitry when USB bus power is present, simplifying USB-powered designs. The device supports in-circuit serial programming (ICSP) via two pins, enabling in-field firmware updates without removing the MCU from the board.
Typical applications include USB human-interface devices (HID keyboards, mice, game controllers), USB-to-UART bridge dongles, low-power sensor nodes with USB diagnostics, and consumer peripherals such as programmable LEDs and cable adapters. The combination of USB 2.0, XLP sleep modes, and 14-pin TSSOP footprint also makes it well-suited for medical and industrial accessories where board area is constrained.
When designing with this device, note that the USB D+/D- pins are shared with general-purpose I/O, so PCB layout must keep the USB differential pair impedance-controlled (90 ohm differential) and route it as close to the connector as possible. The internal voltage regulator on VUSB requires a 1uF decoupling capacitor; omitting it causes USB enumeration failures on some hosts. Industrial-grade temperature parts (-40C to +85C) carry the 'I' suffix, and tape-and-reel packaging adds the 'T' suffix as in this MPN.
This page synthesizes distributor pricing across DigiKey, Mouser, LCSC, and Heisener, drop-in alternatives from the PIC16F1454 family, and practical design notes not found in the manufacturer datasheet summary. Cross-brand drop-in equivalents are limited because the integrated USB 2.0 transceiver in this footprint is unique to Microchip's PIC16F145x series.
直接替换替代料： PIC16LF1454T-I/ST ——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： PIC16LF1454T-I/ST （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Core Architecture, RAM, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
PIC16F1454T-I/ST
✅ 直接替换✓ 有现货
$1.41 / 个
查看数据手册 →PIC16LF1454-I/ST
✅ 直接替换✓ 有现货
$1.41 / 个
查看数据手册 →PIC16LF1454T-I/ST 最大额定值与电气特性
| Core | PIC 8-bit enhanced mid-range |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| RAM | 512 bytes |
| Maximum CPU Speed | 48 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 12 |
| USB | USB 2.0 Full-Speed (Device/Host/OTG) |
| Internal Oscillator | 48 MHz (factory calibrated) |
| 封装 | 14-TSSOP (0.173 in / 4.40 mm width) |
| 工作温度范围 | -40 C to +85 C (Industrial) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| Programming Interface | ICSP (In-Circuit Serial Programming) |
PIC16LF1454T-I/ST 引脚配置
| 引脚 1 | VPP/RE3/MCLR — Programming voltage / Master Clear / digital I/O |
| 引脚 2 | RA0 — Digital I/O / analog input |
| 引脚 3 | RA1 — Digital I/O / analog input |
| 引脚 4 | RA2 — Digital I/O / analog input |
| 引脚 5 | RA3 — Digital I/O / analog input |
| 引脚 6 | RA4 — Digital I/O / analog input |
| 引脚 7 | RA5 — Digital I/O / analog input |
| 引脚 8 | VSS — Ground reference |
| 引脚 9 | RA7/OSC1/CLKIN — Crystal oscillator input / digital I/O |
| 引脚 10 | RA6/OSC2/CLKOUT — Crystal oscillator output / digital I/O |
| 引脚 11 | RC0 — Digital I/O |
| 引脚 12 | RC1 — Digital I/O |
| 引脚 13 | RC2 — Digital I/O |
| 引脚 14 | VDD — Positive power supply (1.8V to 3.6V) |
典型应用
PIC16LF1454T-I/ST 适用于 6 应用s: USB HID Peripheral (Keyboard/Mouse/Gamepad), USB-to-UART Bridge Dongle, Low-Power USB Sensor Node, Consumer USB LED Controller, USB Cable Adapter / Protocol Translator, USB-Connected Medical Accessory.
USB HID Peripheral (Keyboard/Mouse/Gamepad)
The PIC16LF1454T-I/ST is a strong fit for USB Human Interface Devices because it integrates a USB 2.0 Full-Speed transceiver supporting device mode without an external PHY. Its 14KB Flash is sufficient for HID class descriptors, scan-matrix firmware, and basic macro logic, while 512 bytes of RAM accommodates USB endpoint buffers and HID report data. The 12 I/O pins are adequate for a small scan matrix (8x12) or 12 direct-switch inputs. The 1.8V-3.6V operating range enables a single-cell lithium or two-AAA design. Estimated suspend current under XLP sleep mode is below 1 uA, which preserves battery life in wireless dongles that wake on USB resume.
推荐
USB-to-UART Bridge Dongle
A common application for the PIC16LF1454T-I/ST is as a USB-to-UART bridge using the CDC (Communications Device Class) driver that ships with Windows, macOS, and Linux. The integrated USB 2.0 FS engine handles enumeration, while the EUSART peripheral transmits and receives serial data at standard baud rates up to 115.2 kbps and beyond. The 512-byte RAM buffer is sufficient for short data bursts. With XLP sleep modes, the dongle draws under 1 mA when idle. The TSSOP-14 footprint keeps the dongle PCB under 10x15 mm, and the 1.8V-3.6V range allows direct USB 3.3V rail operation when VBUS is regulated externally.
推荐
Low-Power USB Sensor Node
For battery-powered sensor nodes that occasionally attach to a USB host for diagnostics, the PIC16LF1454T-I/ST provides an XLP sleep current of approximately 20 nA in deep sleep, rising only when USB enumeration is required. Its 7-channel 10-bit ADC can sample analog sensors (temperature, battery voltage) before USB transmission, and the 14KB Flash supports protocol stacks and calibration tables. The integrated 3.3V LDO on VUSB can power external sensors when attached, eliminating an external regulator. This makes the part well-suited for environmental loggers, BLE-to-USB gateways, and industrial field instruments that prioritize multi-year battery life.
推荐
Consumer USB LED Controller
The PIC16LF1454T-I/ST drives addressable LED strips via USB for consumer lighting controllers. The 48 MHz core provides sufficient bandwidth for WS2812B/SK6812 timing-critical bit-banging at 800 kbps, and the 14KB Flash stores several lighting modes and effect sequences. USB enumeration allows the host to enumerate as a vendor-specific device, sending color and brightness data over bulk or interrupt endpoints. The 1.8V-3.6V range suits battery-powered wearables, and the TSSOP-14 footprint fits inside small form-factor controllers. The integrated USB transceiver eliminates external USB chips, reducing BOM cost by approximately $0.30-$0.50.
推荐
USB Cable Adapter / Protocol Translator
The PIC16LF1454T-I/ST can translate between USB and I2C, SPI, or GPIO for cable adapter applications such as USB-to-I2C debug probes or USB-to-SPI flash programmers. With 14KB Flash, the firmware fits Microchip's CDC or vendor-class driver plus a configurable protocol translator state machine. The 48 MHz internal oscillator eliminates an external crystal, and ICSP allows in-field firmware updates via a 2-pin programming header. The 14-pin TSSOP footprint enables integration into USB Type-A plug housings or small inline dongles. According to Microchip's datasheet, USB suspend/resume signaling is fully supported through the integrated transceiver.
推荐
USB-Connected Medical Accessory
For medical accessories that stream sensor data over USB (e.g., spirometers, pulse oximeters, hearing-aid programming tools), the PIC16LF1454T-I/ST provides a reliable 8-bit platform with USB 2.0 FS connectivity and low-power modes. The integrated USB 2.0 FS device controller and 3.3V LDO on VUSB simplify host-powered designs and eliminate the need for an external PHY chip. The 14KB Flash fits standard CDC or vendor-class drivers plus protocol stacks. Industrial temperature rating (-40C to +85C) supports a range of clinical environments, and the TSSOP-14 footprint allows integration into small handheld housings. Compliance with IEC 60601-1 EMI/EMC limits requires careful PCB layout for the USB differential pair.
推荐
推荐产品汇总
工程参考数据： PIC16LF1454T-I/ST ——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 | PIC16F1454T-I/ST | PIC16LF1454-I/ST | PIC16LF1454T-I/ML | PIC16LF1454-I/JQ |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP (same) | 14-TSSOP (same) | 16-QFN (different package, NOT pin-compatible) | 16-UQFN (different package, NOT pin-compatible) |
| Operating Voltage | 1.8 V to 3.6 V | 2.0 V to 5.5 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB |
| RAM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| USB 2.0 Full-Speed | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) | Yes (integrated) |
| I/O Pins | 12 | 12 | 12 | 11 | 11 |
| 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 |
| Packaging | Tape & Reel (T suffix) | Tape & Reel | Tube (no T suffix) | Tape & Reel | Tube |
关键差异点
- Integrated USB 2.0 FS transceiver with 3.3V LDO （对比 PIC16F1825-I/ST)
- Lowest operating voltage for battery-powered designs （对比 PIC16F1454T-I/ST)
- Tape-and-reel packaging for production volumes （对比 PIC16LF1454-I/ST)
- Compact TSSOP-14 footprint for hand-soldering （对比 PIC16LF1454T-I/ML (QFN-16))
设计说明
The USB D+ and D- pins (shared with RC4 and RC5 in larger pin-count variants) require 90-ohm differential impedance routing per USB 2.0 specification. Keep the trace length under 50 mm and route as close to the USB connector as possible. Place the VUSB decoupling capacitor (1uF ceramic X7R) within 2 mm of the VUSB pin. Estimated trace impedance for a 4-layer FR4 stack with 0.2 mm dielectric: 90 ohms differential with 0.15 mm trace width and 0.2 mm spacing.
The PIC16LF1454T-I/ST's VUSB pin provides a regulated 3.3V output capable of sourcing up to 200 mA when USB bus power is present. However, this LDO is disabled when VDD is above 3.6V (host-powered scenarios), so designs that switch between USB and battery must include a power-mux circuit (e.g., TI TPS2115A) to prevent backfeed. Estimated quiescent current in XLP sleep mode is below 1 uA, suitable for multi-year battery life in sleep-dominant applications.
Do not omit the 1uF VUSB bypass capacitor; without it, USB enumeration fails intermittently on some hosts. The MCLR/VPP pin requires a 10 kohm pull-up to VDD for normal operation; leaving it floating prevents code execution. The internal 48 MHz oscillator accuracy is +/-2% over the full industrial temperature range, which is sufficient for USB Full-Speed but inadequate for USB High-Speed or precision timing applications.
Route the ICSP programming signals (PGC/PGD) away from switching noise sources and keep them under 50 mm to ensure reliable in-circuit programming. The TSSOP-14 thermal pad is not present, so all dissipation occurs through the 14 leads; for high-current USB applications, use a copper pour on the top layer to enhance thermal dissipation. Decoupling: place 100 nF X7R ceramic as close as possible to VDD (pin 14) and VSS (pin 8).
合规信息
RoHS compliant per Microchip product page. Industrial temperature grade (-40C to +85C). Not AEC-Q100 qualified - AEC-Q100 variants in the PIC16F1xxx family are typically offered in larger QFN or LQFP packages. Lead-free and halogen-free per Microchip environmental compliance documents.
