PIC16F1454T-I/ST - 8-bit USB MCU 14KB Flash 48MHz TSSOP-14 | Microchip
MPN: PIC16F1454T-I/ST β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.34 | $2.34 |
| 10 | $2.11 | $21.10 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.41 | $1,410.00 |
PIC16F1454T-I/ST Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program memory (flash/ROM), working memory (RAM), and programmable peripherals into a single chip. The PIC16F1454 belongs to the 8-bit PIC16 family of microcontrollers, which sit at the entry-level of Microchip's product hierarchy (PIC16F -> 8-bit MCU -> MCU -> semiconductor). The 'XLP' (eXtreme Low Power) branding signals sleep currents in the microamp range, which is critical for battery-powered USB HID, sensor, and remote-control designs.
Key features include 128 B of non-volatile data storage (EEPROM-like), a Universal Serial Bus 2.0 module with clock recovery from the USB host (eliminating an external crystal for many USB applications), an MI2C/SPI master module, and 8 general-purpose I/O pins. The internal 48MHz oscillator supports USB full-speed operation without an external resonator, simplifying the BOM and shrinking the PCB footprint.
Typical applications include USB HID peripherals (keyboards, mice, custom HID devices), USB-to-UART bridges, sensor hubs, low-cost capacitive touch interfaces, lighting controls, and consumer products that need a single-chip USB solution at minimum external component count. The wide 2.3V-5.5V operating range also suits direct USB bus-powered designs.
When designing with this part, leverage the internal 48MHz oscillator for USB to avoid external crystal cost, but add a 0.1uF decoupling capacitor near every VDD pin and route the USB D+/D- lines as a 90-ohm differential pair. The 14-pin TSSOP leaves only 8 usable GPIO, so plan pin allocation early.
This page consolidates verified distributor pricing, drop-in TSSOP-14 alternatives, and practical USB design guidance that goes beyond what the manufacturer datasheet alone provides.
Drop-in alternatives for PIC16F1454T-I/ST β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F1454T-I/ST (same form factor and footprint) β differing in Package, Internal Oscillator, USB Module, RoHS Status, I/O Pins.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F1454-I/ST
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1455-I/ST
β Drop-Inβ In Stock
$1.31 / Unit
View Datasheet βPIC16F1454-E/P
β Drop-Inβ In Stock
$1.32 / Unit
View Datasheet βPIC16F1454T-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 enhanced mid-range 8-bit RISC |
| Instruction Set | 49 instructions, 16 stack levels |
| Instruction Execution Time | 200 ns at 48 MHz (1 instruction per Tcy) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| RAM | 1 KB (1K x 8) |
| Non-volatile Data EEPROM | 128 B |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Internal Oscillator | 48 MHz (USB-capable) |
| USB Module | USB 2.0 Full-Speed with clock recovery from host |
| Serial Interfaces | MI2C/SPI (Master I2C/SPI) |
| General-Purpose I/O Pins | 8 |
| Operating Temperature | -40 C to +85 C (industrial grade) |
| Package | 14-pin TSSOP (4.40 mm width) |
| Mounting Type | Surface Mount, Tape and Reel (T suffix) |
| MSL Level | 1 (unlimited floor life at <=30C/85% RH) |
| RoHS Status | Compliant |
PIC16F1454T-I/ST Pin Configuration
| Pin 1 | RA3 β Digital I/O / AN3 |
| Pin 2 | RA4 β Digital I/O / AN4 |
| Pin 3 | RA5/MCLR/VPP β Digital I/O / Master Clear (reset) / Programming voltage |
| Pin 4 | VSS β Ground reference |
| Pin 5 | VDD β Positive supply voltage (2.3 V to 5.5 V) |
| Pin 6 | RA1/D-/ICSPCLK β Digital I/O / USB D- / ICSP clock |
| Pin 7 | RA0/D+/ICSPDAT β Digital I/O / USB D+ / ICSP data |
| Pin 8 | RA2 β Digital I/O |
| Pin 9 | RC0 β Digital I/O |
| Pin 10 | RC1 β Digital I/O |
| Pin 11 | RC2 β Digital I/O |
| Pin 12 | RC3 β Digital I/O |
| Pin 13 | RC4 β Digital I/O |
| Pin 14 | RC5 β Digital I/O |
Typical Applications
PIC16F1454T-I/ST is suitable for 6 applications: USB HID Peripheral (Keyboard / Mouse / Custom HID), USB CDC Virtual COM Port Bridge, Capacitive Touch Interface with USB, Sensor Hub / Data Logger, Lighting Control (DMX / Custom USB), USB-Based Firmware Update / Bootloader Target.
USB HID Peripheral (Keyboard / Mouse / Custom HID)
The PIC16F1454T-I/ST integrates a USB 2.0 full-speed device controller with on-chip clock recovery from the USB host, eliminating the need for an external 4 MHz crystal in keyboard, mouse, or custom HID designs. The 14 KB flash fits Microchip's USB HID class stack plus matrix-scanning firmware for typical 8x8 or 10x8 key matrices, while the 1 KB RAM supports HID report buffering. The internal 48 MHz oscillator drives the USB 48 MHz clock directly, minimizing BOM cost and shrinking PCB footprint to the 14-pin TSSOP. At typical HID polling rates of 125 Hz, the XLP idle current stays in the microamp range, making it suitable for battery-powered wireless HID dongles.
Recommended
USB CDC Virtual COM Port Bridge
For low-cost USB-to-UART bridges, the PIC16F1454T-I/ST runs a CDC ACM class stack on its USB 2.0 module and uses the MI2C/SPI master to interface with an external UART transceiver or to expose a serial console via direct bit-banging on the GPIO. The 48 MHz internal oscillator delivers clean USB packet timing without an external resonator, while the 2.3 V-5.5 V VDD range lets the part run directly off USB VBUS (5 V) without a separate regulator. The 128-byte EEPROM provides storage for VID/PID or user configuration, and the 8 GPIO pins remain available for handshaking signals (RTS, CTS) when needed.
Recommended
Capacitive Touch Interface with USB
The PIC16F1454T-I/ST's MI2C/SPI master module interfaces directly with Microchip's MTCH10xx capacitive-touch front-end ICs, while the USB 2.0 module reports touch events to a host PC as HID digitizer or vendor-class reports. The XLP low-power modes keep idle current under 1 uA, and the 8 GPIO pins accommodate wake-from-touch logic. This combination enables single-chip USB touch-pad, slider, and button interfaces for consumer peripherals, kitchen appliances, and industrial control panels where the small 14-pin TSSOP fits into space-constrained enclosures.
Recommended
Sensor Hub / Data Logger
The PIC16F1454T-I/ST operates as a USB-tethered sensor hub by polling I2C sensors through its MI2C/SPI master and streaming readings to a host over USB CDC. The 1 KB RAM buffers incoming sensor data while the 14 KB flash holds USB stack and sensor parsing routines. The wide 2.3 V-5.5 V supply range lets the device run from a single 18650 cell, and the XLP sleep modes drop quiescent current to ~20 nA between samples. The 128-byte EEPROM stores calibration constants, and the 8 GPIO pins provide interrupt wake-up lines from external sensors.
Recommended
Lighting Control (DMX / Custom USB)
For USB-controlled LED lighting, the PIC16F1454T-I/ST receives DMX-over-USB frames via its USB 2.0 module and generates PWM or constant-current drive signals on the GPIO to control LED strings. The 14 KB flash fits a full DMX512 receiver stack plus color-mixing firmware, while the 48 MHz internal oscillator provides accurate 8-bit PWM at typical 1 kHz refresh rates. The industrial -40 C to +85 C temperature grade supports indoor architectural and stage-lighting enclosures, and the small TSSOP-14 footprint enables placement inside dimmer packs and inline controllers.
Recommended
USB-Based Firmware Update / Bootloader Target
The PIC16F1454T-I/ST can serve as the host-side microcontroller in a USB DFU (Device Firmware Upgrade) bootloader target, leveraging its on-chip USB module to receive new firmware images over USB and self-program its 14 KB flash via the high-endurance Flash (HEF) feature. The 128-byte non-volatile data EEPROM stores bootloader flags and revision counters. The internal 48 MHz oscillator ensures USB timing compliance without external crystals, and the 14-pin TSSOP allows the part to be placed on small accessory boards that only need USB-CDC for firmware updates.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1454T-I/ST β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1454-I/ST | PIC16F1455-I/ST | PIC16F1454-E/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TSSOP-14 (Tape & Reel) | TSSOP-14 (Tube) - same | TSSOP-14 - same | PDIP-14 - through-hole |
| Flash Memory | 14 KB (8K x 14) | 14 KB (same) | 16 KB (+14%) | 14 KB (same) |
| RAM | 1 KB | 1 KB (same) | 1.4 KB (+40%) | 1 KB (same) |
| EEPROM | 128 B | 128 B (same) | 128 B (same) | 128 B (same) |
| CPU Frequency | 48 MHz | 48 MHz (same) | 48 MHz (same) | 48 MHz (same) |
| USB Module | USB 2.0 FS with clock recovery | USB 2.0 FS with clock recovery (same) | USB 2.0 FS with clock recovery (same) | USB 2.0 FS with clock recovery (same) |
| Operating Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V (same) | 2.3 V to 5.5 V (same) | 2.3 V to 5.5 V (same) |
| Temperature Grade | Industrial -40 C to +85 C | Industrial -40 C to +85 C (same) | Industrial -40 C to +85 C (same) | Extended -40 C to +125 C |
| GPIO Count | 8 | 8 (same) | 8 (same) | 8 (same) |
Key Differentiators
- On-chip USB 2.0 full-speed with clock recovery (vs PIC16F1454-I/ST)
- Lowest-pin-count USB MCU in PIC16F145x family (vs PIC16F1455-I/ST)
- Tape-and-reel packaging for production assembly (vs PIC16F1454-I/ST)
Design Notes
Route the USB D+ (RA0/ICSPDAT) and D- (RA1/ICSPCLK) traces as a 90 ohm differential pair with continuous ground reference underneath, kept under 50 mm in length to meet USB 2.0 signal-integrity masks. Place a 0.1 uF decoupling capacitor within 5 mm of the VDD pin and a bulk 10 uF tantalum or ceramic capacitor near the device. The internal 48 MHz oscillator eliminates an external crystal, but still requires clean analog-style layout: keep noisy digital traces (PWM, switching regulators) more than 10 mm away from the oscillator pins and D+/D- pair.
The PIC16F1454T-I/ST draws ~5 mA at full 48 MHz operation and drops to ~20 nA in XLP sleep with peripherals off. For USB bus-powered designs, add a 10 uF bulk capacitor on VBUS to absorb inrush current during enumeration and prevent VBUS sag that can reset the device. The internal regulator derived from VDD supports the 2.3 V-5.5 V range; no separate core voltage rail is needed, simplifying the power tree for 2xAA or single-cell Li-ion battery designs.
Common pitfalls when using PIC16F1454T-I/ST: (1) The ICSPDAT and ICSPCLK pins RA0/RA1 are multiplexed with USB D+/D-, so ICSP programming over the same pins during firmware bring-up requires disconnecting the USB bus to avoid driver conflict. (2) The MCLR pin (RA5) is shared with the MCLR reset; leaving it floating causes erratic resets - always tie RA5 to VDD via a 10 kohm pull-up for normal operation. (3) The 14-pin TSSOP has only 8 usable GPIO, so plan pin allocation early - do not assume all peripherals can coexist simultaneously.
Compliance Information
RoHS and REACH compliant per Microchip product page. Lead-free matte-tin finish rated for reflow soldering at peak 260 C for 30 seconds. Not AEC-Q100 qualified - choose a different part for automotive applications. Industrial temperature grade -40 C to +85 C.
