PIC16F1454-I/ST - 14KB Flash USB MCU, 48MHz | Microchip
MPN: PIC16F1454-I/ST β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.9 | $1.90 |
| 10 | $1.71 | $17.10 |
| 100 | $1.43 | $143.00 |
| 500 | $1.27 | $635.00 |
| 1,000 | $1.12 | $1,120.00 |
| 3,000 | $1.02 | $3,060.00 |
PIC16F1454-I/ST Overview
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path that combines a CPU, program memory, data RAM, peripherals, and I/O in one package. The PIC architecture is a RISC (Reduced Instruction Set Computer) design with separate program and data buses (Harvard architecture), giving it deterministic instruction timing and excellent code density in C and assembly. Within the broader product taxonomy, PIC16F1454 belongs to the 8-bit MCU > microcontroller > embedded controller > semiconductor family, and as an XLP (eXtreme Low Power) device it sits beside 16-bit PIC24 and 32-bit PIC32 families, targeting low-cost USB nodes that do not require 32-bit performance.
Key features include 12 MIPS peak throughput at 48 MHz, 14 I/O pins with interrupt-on-change, a 10-bit ADC with up to 9 channels, two PWM modules, two 8-bit timers and one 16-bit timer, a hardware master I2C/SPI block, and a configurable logic cell (CLC) peripheral. Integrated USB 2.0 full-speed support with on-chip 3.3V regulator and 1.5 kΞ© pull-up resistor allows direct USB bus connection without external transceiver or LDO. Sleep currents as low as 20 nA (Watchdog Timer off) make the part suitable for always-on USB devices powered from the bus.
Typical applications include USB Human Interface Devices (HID) such as keyboards, mice, and gamepads, USB-to-UART bridges, USB CDC virtual COM ports, low-cost logic analyzers, USB sensor nodes, industrial USB instrumentation, and consumer USB accessories. The combination of low pin count, integrated USB, and ultra-low standby current also makes it attractive for battery-powered accessories with a USB charging or data interface.
When designing with PIC16F1454-I/ST, place a 1 Β΅F decoupling capacitor adjacent to VDD and a 20 Β΅F bulk capacitor on the internal 3.3V regulator output (VDD3) for stable USB signaling. Route the USB DP/DM traces as a 90 Ξ© differential pair with length matching within 150 mil, and follow Microchip application note TB3068 layout guidelines for EMI and radiated emissions compliance. Verify the configured clock source (INTOSC, HS, or PLL) is enabled before USB transactions to prevent enumeration failures.
A firmware-only USB stack (Microchip MLA) plus on-chip USB peripherals typically fits in 4-6 KB of Flash, leaving 8-10 KB for application code. This page combines distributor pricing, drop-in alternative part numbers, and practical design notes not found in a single datasheet, supporting both prototype sourcing and high-volume procurement.
Drop-in alternatives for PIC16F1454-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 PIC16F1454-I/ST (same form factor and footprint) β differing in I/O Pins, Operating Temperature, Package, Program Memory (Flash), Communication Peripherals.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16LF1454-I/ST
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1455-I/ST
β Drop-Inβ In Stock
$1.31 / Unit
View Datasheet βPIC16F1454-I/ST Maximum Ratings & Electrical Characteristics
| Family | PIC16F145x/9 (XLP) |
| Core | Enhanced mid-range 8-bit PIC RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data SRAM | 1024 bytes |
| Maximum CPU Speed | 48 MHz |
| Instruction Cycle | 200 ns (4 Fosc cycles) |
| MIPS (Peak) | 12 MIPS |
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Internal 3.3V Regulator Output (VDD3) | 3.3 V (USB transceiver supply) |
| I/O Pins | 11 (14-pin package) |
| ADC | 10-bit, up to 9 channels |
| PWM Modules | 2 (10-bit) |
| Timers | 2 x 8-bit + 1 x 16-bit |
| USB Controller | USB 2.0 Full-Speed 12 Mbps with on-chip SIE, transceiver, pull-up |
| Communication Peripherals | I2C, SPI, UART, USB |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 14-pin TSSOP (4.4 mm body width) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16F1454-I/ST Pin Configuration
| Pin 1 | VDD β Positive supply voltage (2.3V to 5.5V) |
| Pin 2 | RA5 β Digital I/O / ICSPDAT / programming data |
| Pin 3 | RA4 β Digital I/O / CLKOUT / SOSCO |
| Pin 4 | RA3 β Digital I/O / MCLR (Master Clear reset, active low) |
| Pin 5 | RC5 β Digital I/O / CCP1 / PWM output |
| Pin 6 | RC4 β Digital I/O / C2OUT / PWM output |
| Pin 7 | RC3 β Digital I/O / SCL (I2C clock) / AN7 |
| Pin 8 | RC2 β Digital I/O / SDA (I2C data) / AN6 |
| Pin 9 | RC1 β Digital I/O / SOIC SP1 / AN5 |
| Pin 10 | RC0 β Digital I/O / SCL2 / AN4 |
| Pin 11 | RA1 β Digital I/O / ICSPCLK / programming clock |
| Pin 12 | RA0 β Digital I/O / ICSPDAT / D+ indicator |
| Pin 13 | VSS β Ground reference |
| Pin 14 | VDD3 β Internal 3.3V USB regulator output (requires 1uF cap) |
Typical Applications
PIC16F1454-I/ST is suitable for 6 applications: USB HID Keyboard/Mouse Controller, USB-to-UART Bridge / CDC Virtual COM Port, USB Battery Charger / Power Bank Controller, Low-Cost USB Sensor Node, USB LED Driver / Lighting Controller, USB Educational / Maker Board MCU.
USB HID Keyboard/Mouse Controller
The PIC16F1454-I/ST is purpose-built for low-cost USB Human Interface Devices such as keyboards, mice, numeric keypads, and game controllers. Its integrated USB 2.0 full-speed controller with on-chip transceiver and 3.3V regulator eliminates the external USB PHY and LDO typically required, while the 14 KB Flash fits a Microchip MLA HID bootloader plus scan-matrix firmware with room to spare. The 48 MHz internal oscillator maintains Β±1% accuracy across voltage and temperature, ensuring USB signaling stays within the Β±0.25% tolerance required by USB 2.0 spec.
Recommended
USB-to-UART Bridge / CDC Virtual COM Port
The PIC16F1454-I/ST is widely deployed as a CDC-class USB-to-UART bridge, providing a low-cost replacement for FTDI FT232 chips in debug consoles, industrial sensor nodes, and field-upgradable embedded firmware tools. The integrated USB controller and 1024-byte SRAM buffer handle full-speed 12 Mbps CDC transfers without host-side bottlenecks, while the hardware UART supports standard baud rates up to 1 Mbaud. Pair with Microchip MLA CDC stack to deliver a virtual COM port across USB with minimal firmware effort.
Recommended
USB Battery Charger / Power Bank Controller
In USB battery charger and power bank applications, the PIC16F1454-I/ST monitors bus voltage via its 10-bit ADC, drives status LEDs through PWM channels, and negotiates USB current modes via the integrated USB controller. The 20 nA sleep current extends shelf life when the device is unplugged, while the 2.3V to 5.5V VDD range supports direct Li-ion cell monitoring without additional voltage translation. The 14-pin TSSOP package keeps the PCB footprint under 30 mmΒ² for compact wearable power banks.
Recommended
Low-Cost USB Sensor Node
The PIC16F1454-I/ST is well suited to USB-attached sensor nodes for laboratory, environmental, or industrial data acquisition, where a 10-bit ADC with up to 9 analog channels provides adequate resolution for temperature, light, or pressure sensors. The internal 48 MHz oscillator and hardware USB stack let a single chip implement data logging at 1 kHz sample rates with bulk USB transfers, while interrupt-on-change GPIO simplifies wake-on-event operation. The 1024-byte SRAM accommodates 512-sample circular buffers.
Recommended
USB LED Driver / Lighting Controller
USB-driven LED controllers, stage lighting, and architectural dimmers benefit from the PIC16F1454-I/ST's two 10-bit PWM outputs and integrated USB control. The PIC can decode DMX-over-USB or vendor-specific lighting protocols, drive high-current LED strings via external MOSFETs, and offer firmware-upgradable personality through the USB bootloader. Low sleep current (20 nA) makes it viable for battery-powered decorative lighting that wakes on USB insert.
Recommended
USB Educational / Maker Board MCU
Educational platforms and open-source maker projects favor the PIC16F1454-I/ST for its integrated USB (no external crystal or LDO needed), 14 KB Flash for student projects, and free Microchip MPLAB X IDE plus XC8 compiler support. The Curiosity LP development board is built around this MCU, providing a low-cost entry point at under $20 for learning embedded USB development. The 14-pin TSSOP is also easy to hand-solder on custom PCBs, making it a popular choice for university labs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F1454-I/ST β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1454-I/ST | PIC16F1455-I/ST | PIC16F1454-I/SL |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same | 14-TSSOP - same | 14-SOIC (different footprint) |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB |
| SRAM | 1024 bytes | 1024 bytes | 1024 bytes | 1024 bytes |
| Maximum Frequency | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Supply Voltage | 2.3V to 5.5V | 1.8V to 3.6V (low-voltage F) | 2.3V to 5.5V | 2.3V to 5.5V |
| USB Controller | Integrated USB 2.0 FS + 3.3V LDO | Integrated USB 2.0 FS + 3.3V LDO | Integrated USB 2.0 FS + 3.3V LDO | Integrated USB 2.0 FS + 3.3V LDO |
| I2C/SPI Peripherals | 1 each (MSSP) | 1 each (MSSP) | 2 each (MSSP x2) | 1 each (MSSP) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Key Differentiators
- Lower-voltage supply option with same pinout (vs PIC16LF1454-I/ST)
- Additional I2C/SPI peripheral without changing footprint (vs PIC16F1455-I/ST)
- Wider 14-pin SOIC option available on same silicon (vs PIC16F1454-I/SL)
Design Notes
Place a 1 Β΅F X7R ceramic decoupling capacitor within 3 mm of the VDD pin (pin 1) and an additional 0.1 Β΅F capacitor adjacent to the IC for high-frequency noise suppression. The internal 3.3V regulator output on VDD3 (pin 14) requires a 1 Β΅F X5R or X7R capacitor with ESR below 200 mΞ© to meet USB 2.0 signaling specifications. According to Microchip datasheet Section 2.0, insufficient decoupling on VDD3 can cause USB enumeration failures and bus reset loops.
Route the USB D+ and D- lines as a 90 Ξ© differential pair with characteristic impedance maintained within Β±10% tolerance, length matching within 150 mil (3.8 mm), and no stubs. Place the common-mode choke and ESD protection array within 10 mm of the USB connector. The 14-pin TSSOP package's 0.65 mm pin pitch allows dual-layer PCB routing, but ground plane stitching vias every 5 mm along the D+/D- traces are recommended to maintain impedance continuity. Reference Microchip application note TB3068 for full USB-IF compliance layout.
Do not attempt to source more than 100 mA from the VDD3 internal regulator output - this is the supply for the USB transceiver only, not a general-purpose 3.3V rail. For designs needing a 3.3V system rail, add an external LDO such as MCP1700 or MIC5205. Also note that the MCLR pin (RA3, pin 4) must be tied to VDD through a 10 kΞ© pull-up resistor for normal operation; floating MCLR will cause intermittent resets. Verify that your debugger is configured for the PIC16F1454 device ID 0x3020 before programming.
Estimated: at 48 MHz CPU clock, the internal oscillator drives the USB SIE with a 48 MHz reference that must be enabled before USB transactions to avoid dropped packets. Configure the ACTIVE_TUNING register per Microchip errata DS80000496F if using the USB clock auto-tuning feature across temperature. For USB-IF compliance testing, add a 1.5 kΞ© pull-up resistor on D+ (internal pull-up is enabled by firmware but requires VDD3 present).
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified (industrial temperature grade only). Lead-free and halogen-free per Microchip packaging materials declaration.
