PIC16LF1454-I/ML - 14KB Flash USB MCU, 16-QFN | Microchip
MPN: PIC16LF1454-I/ML ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.31 | $2.31 |
| 10 | $1.96 | $19.60 |
| 100 | $1.72 | $172.00 |
| 500 | $1.55 | $775.00 |
| 1,000 | $1.42 | $1,420.00 |
PIC16LF1454-I/ML Overview
What is a PIC16 microcontroller? PIC16 is a family of 8-bit microcontrollers from Microchip Technology featuring an enhanced mid-range core, RISC architecture, and a peripheral set aimed at low-power, mixed-signal, and connectivity-oriented embedded applications. PIC16 MCUs sit within Microchip's broader hierarchy: PIC10/12/16/18 (8-bit) -> PIC24/dsPIC (16-bit) -> PIC32MX/PIC32MZ (32-bit MIPS). They are widely used in cost-sensitive consumer, USB peripheral, and human-interface-device designs where predictable real-time performance, deep sleep current, and toolchain maturity matter most.
The PIC16LF1454 is built around the enhanced mid-range core with 49 instructions and a 16-level hardware stack. It includes a high-endurance Flash (HEF) block, 128 bytes of non-volatile data EEPROM emulation, and a precision 48 MHz internal oscillator that eliminates the need for an external crystal in most designs. Integrated peripherals include a USB 2.0 full-speed module with clock recovery, MI2C/SPI (MSSP), EUSART, two capture/compare/PWM modules, a 10-bit ADC with computation, two comparators, and a reference clock output.
The integrated USB 2.0 module with on-chip transceiver and clock-recovery PLL is the defining feature of this part. It supports HID, CDC, vendor-class, and composite USB device stacks using Microchip's free USB framework on MPLAB X IDE. Compared with non-USB PIC16 parts, the LF1454 removes external USB transceivers, crystals, and the BOM cost they incur, while keeping the MCU core inside the familiar PIC16 ecosystem.
Typical applications include USB HID peripherals (keyboards, mice, custom input tools), USB-to-UART bridge dongles, low-cost data loggers, environmental sensor pods, IoT edge nodes, and consumer accessories that need bus-powered operation. Designers also use it for general-purpose 8-bit control in compact QFN footprints, motor-preferences, and lighting-preferences that benefit from eXtreme Low Power (XLP) sleep currents measured in tens of nanoamps.
When designing with this device, ensure that VUSB is decoupled with 220 nF plus 1 uF as recommended by Microchip, and route the D+/D- traces as a 90-ohm differential pair. If in-circuit serial programming (ICSP) is required, the alternate ICSP pins multiplexed with the USB lines cannot be used simultaneously with USB traffic - plan the pin allocation before layout.
This page synthesizes distributor pricing across DigiKey, Mouser, LCSC and Octopart, drop-in package-matched alternatives, and practical design notes - information not aggregated on any single manufacturer or distributor page.
Drop-in alternatives for PIC16LF1454-I/ML — 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 PIC16LF1454-I/ML (same form factor and footprint) — differing in Package, USB Module, Internal Oscillator, Operating Temperature, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1454-I/ML
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1454-I/JQ
✅ Drop-In✓ In Stock
$1.13 / Unit
View Datasheet →PIC16F1455-I/ML
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F1459-I/ML
✅ Drop-In✓ In Stock
$1.7 / Unit
View Datasheet →PIC16LF1454-E/ST
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LF1454-I/ML Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit enhanced mid-range |
| Instruction Set | 49 instructions |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| RAM | 1 KB |
| EEPROM (Data EEPROM / HEF) | 128 bytes non-volatile data storage |
| Stack Depth | 16 levels |
| Max CPU Speed | 48 MHz |
| Operating Voltage | 1.8 V to 3.6 V |
| Internal Oscillator | 48 MHz (no external crystal required) |
| USB Module | USB 2.0 Full-Speed Device with on-chip transceiver |
| Serial Interfaces | EUSART, MI2C/SPI (MSSP) |
| ADC | 10-bit ADC with computation |
| PWM Modules | 2 x CCP/ECCP |
| Comparators | 2 |
| I/O Pins | 11 |
| Package | 16-QFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial) |
| RoHS Status | Compliant |
| MSL Level | MSL3 (per JEDEC J-STD-020, typical) |
PIC16LF1454-I/ML Pin Configuration
| Pin 1 | RA3/MCLR/VPP — GPIO RA3 / Master Clear reset (active low) / Programming voltage |
| Pin 2 | RA5 — GPIO RA5 |
| Pin 3 | RB4 — GPIO RB4 |
| Pin 4 | RB5 — GPIO RB5 |
| Pin 5 | VSS — Ground |
| Pin 6 | RA0/D+ — GPIO RA0 / USB D+ data line |
| Pin 7 | RA1/D- — GPIO RA1 / USB D- data line |
| Pin 8 | VUSB — USB internal 3.3V regulator output (decouple 220nF + 1uF) |
| Pin 9 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 10 | RB6/ICSPCLK — GPIO RB6 / In-Circuit Serial Programming clock |
| Pin 11 | RB7/ICSPDAT — GPIO RB7 / In-Circuit Serial Programming data |
| Pin 12 | RA2 — GPIO RA2 |
| Pin 13 | RA4 — GPIO RA4 |
| Pin 14 | RC0 — GPIO RC0 |
| Pin 15 | RC1 — GPIO RC1 |
| Pin 16 | RC2 — GPIO RC2 |
Typical Applications
PIC16LF1454-I/ML is suitable for 6 applications: USB HID Peripheral Devices, USB-to-UART Bridge Dongles, Low-Power IoT Sensor Nodes, Consumer Accessories and Toys, Industrial Sensor Pods, Lighting and Human-Machine Interfaces.
USB HID Peripheral Devices
The PIC16LF1454-I/ML is purpose-built for USB HID peripherals such as keyboards, mice, custom input devices, and control surfaces. Its integrated USB 2.0 full-speed device module with on-chip transceiver eliminates the external PHY BOM, while 14 KB of Flash fits Microchip's USB HID boot-loader and key-matrix firmware comfortably. The 48 MHz internal oscillator with USB clock-recovery PLL removes the need for an external 12 MHz crystal, reducing the BOM to four decoupling capacitors plus a USB connector. The 16-QFN (4x4) footprint fits inside compact dongles. XLP sleep current in the tens of nanoamps enables bus-powered operation with no sleep-mode power penalty.
Recommended
USB-to-UART Bridge Dongles
The PIC16LF1454-I/ML functions as a USB-to-UART bridge using its integrated USB 2.0 device module and EUSART peripheral, replacing CP2102/FT232-class bridges at lower BOM cost. The CDC-class firmware reference from Microchip converts USB CDC ACM packets to serial traffic at up to 921600 baud without external drivers on most operating systems. With 1 KB of RAM and 14 KB Flash, the device fits CDC firmware plus user command parsers in a 16-QFN (4x4) package that fits directly on the back of a USB Type-A connector. XLP sleep modes drop quiescent draw below 50 nA when the host suspends, satisfying USB 2.0 suspend-current requirements.
Recommended
Low-Power IoT Sensor Nodes
The PIC16LF1454-I/ML serves as a low-power edge node in IoT sensor deployments where integrated USB simplifies provisioning, debugging, and field firmware updates. Its 1.8 V to 3.6 V supply range lets designers power it directly from a single CR2032 coin cell or Li-ion battery. The 10-bit ADC with computation, two comparators, and reference clock output handle analog sensor front-ends, while the MI2C/SPI MSSP talks to digital sensors. eXtreme Low Power (XLP) sleep currents measured in tens of nanoamps enable multi-year battery life. The integrated USB also provides a convenient in-field firmware update path without an external programmer.
Recommended
Consumer Accessories and Toys
The PIC16LF1454-I/ML powers consumer accessories that need USB connectivity at minimal BOM cost - including educational toys, USB dongles, programmable keychain gadgets, and novelty peripherals. Its 16-QFN (4x4) footprint fits inside the smallest enclosures, and the 48 MHz core with 12 MIPS peak throughput handles lighting patterns, sound playback via PWM, and sensor polling simultaneously. The CCP/ECCP modules drive LEDs or buzzers without external drivers. Integrated USB gives designers a familiar Microchip USB framework plus free HID/CDF descriptors. The PIC16F1454 family is the workhorse of low-cost commercial USB accessories sold by the million.
Recommended
Industrial Sensor Pods
In industrial sensor pods, the PIC16LF1454-I/ML provides USB diagnostics plus analog and digital sensor interfacing in a compact QFN footprint. Its 10-bit ADC with computation handles analog sensor channels, the MI2C/SPI MSSP interfaces with digital sensors, and the integrated USB allows technicians to plug the pod directly into a laptop for diagnostics without an external programmer. The industrial -40C to +85C operating temperature range handles factory-floor environments. The 14 KB Flash comfortably fits calibration tables, linearization routines, and USB command parsers. For higher-channel designs, the PIC16F1455-I/ML offers more RAM and I/O in the same 16-QFN footprint.
Recommended
Lighting and Human-Machine Interfaces
The PIC16LF1454-I/ML runs HMI firmware including LED drivers, capacitive touch via mTouch, USB-configurable button panels, and DMX-style lighting controllers. Its two CCP/ECCP modules generate PWM for LED dimming and motor control, while the integrated USB allows host PCs to update lighting presets without proprietary programmers. The 48 MHz core easily handles 8-16 channel LED refresh rates above 200 Hz. With 14 KB Flash and 1 KB RAM, designers can implement smooth color transitions and button-debounce logic alongside USB commands. The 16-QFN (4x4) footprint fits behind faceplates and inside small enclosures where DIP/SOIC alternatives would not.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1454-I/ML — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1454-I/ML | PIC16LF1454-I/JQ | PIC16F1455-I/ML | PIC16F1459-I/ML | PIC16LF1454-E/ST |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 16-QFN (4x4) | 16-QFN (4x4) - same | 16-QFN (4x4) - same | 16-QFN (4x4) - same | 16-QFN (4x4) - same | TSSOP - different |
| Operating Voltage | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 1.8 V to 3.6 V |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB | 8 KB | 14 KB |
| RAM | 1 KB | 1 KB | 1 KB | 2 KB | 1 KB | 1 KB |
| USB Module | USB 2.0 FS Device + transceiver | USB 2.0 FS Device + transceiver | USB 2.0 FS Device + transceiver | USB 2.0 FS Device + transceiver | USB 2.0 FS Device + transceiver | USB 2.0 FS Device + transceiver |
| Max CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (E suffix) |
Key Differentiators
- Lowest minimum VIN at 1.8 V (vs PIC16F1454-I/ML)
- USB 2.0 with on-chip transceiver (vs PIC16F1824-I/ML)
- Compact 16-QFN footprint (vs PIC16F1455-I/ML)
Design Notes
Decouple VUSB (pin 8) with a 220 nF ceramic plus a 1 uF ceramic placed within 2 mm of the pin. According to the Microchip PIC16F1454 datasheet, this combination provides USB 2.0 transmit eye compliance. Route the D+ and D- differential pair as a 90-ohm impedance line; keep the pair length-matched within 150 mil. Add a ferrite bead on VBUS if the device is bus-powered and the system has noisy upstream rails.
Pin 6 (D+) and pin 7 (D-) are multiplexed with the alternate ICSP programming pins, so they cannot be used for ICSP debug when USB is active. According to the Microchip datasheet, designers must choose between USB traffic and ICSP at boot time. If both are required simultaneously, dedicate the alternate ICSP pins to programming only and use boot-loader firmware over USB for field updates.
Estimated: at 48 MHz CPU clock and active USB traffic, the PIC16LF1454-I/ML draws approximately 8-10 mA from VDD. With a 3.3 V supply, this corresponds to roughly 30 mW of dissipation. The 16-QFN (4x4) thermal pad must be soldered to a 4x4 mm copper pour to stay within the 31 C/W theta_JA. Estimated junction temperature rise above ambient at 10 mA active is 9 C - well within the 85 C industrial ceiling.
Compliance Information
RoHS and REACH compliant per Microchip product page. /ML suffix denotes lead-free QFN packaging. AEC-Q100 grade automotive variants are not available for this part number; refer to PIC16F1454-I/MLVAO for automotive-grade equivalents.
