PIC16LF1454-I/JQ - 8-bit 48MHz USB MCU 14KB Flash UQFN-16 | Microchip
MPN: PIC16LF1454-I/JQ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.78 | $1.78 |
| 10 | $1.6 | $16.00 |
| 100 | $1.42 | $142.00 |
| 500 | $1.27 | $635.00 |
| 1,000 | $1.13 | $1,130.00 |
PIC16LF1454-I/JQ Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash, RAM, EEPROM), and peripherals such as timers, ADC, communication interfaces, and I/O. The PIC16LF1454 belongs to the 8-bit PIC family, a RISC architecture with a small, deterministic instruction set (49 instructions, 16 stack levels) widely used in cost-sensitive embedded designs. Within the broader taxonomy, this part is a low-power (LF) USB-capable general-purpose MCU in the mid-range PIC16F1xxx line.
Key differentiating features include the integrated USB 2.0 module with clock recovery from the USB host (eliminating an external crystal for USB in many designs), a 48 MHz internal oscillator with 4x PLL for USB operation, 8 general-purpose I/O pins, 128 B of non-volatile data storage, MI2C, and high-endurance flash memory (HEF). XLP (eXtreme Low Power) technology delivers typical sleep currents below 1 uA, while the integrated 10-bit ADC and PWM outputs support sensor and motor-control sub-functions.
Architecturally, the device uses a Harvard-style RISC core with a 14-bit instruction word, self read/write capable flash, and a dedicated USB SIE that handles NRZI encoding/decoding, bit stuffing, and resume/reset signaling without CPU intervention. The 4x PLL allows the 48 MHz USB clock to be derived from a low-frequency internal source, reducing BOM cost and simplifying layout.
Typical applications include USB HID peripherals (mouse, keyboard, custom input devices), USB-to-UART bridge dongles, low-cost USB sensor interfaces, USB cable identification and charger emulators, USB LED controllers, and consumer accessories that must present as a USB device. The small 4x4 mm UQFN footprint suits space-constrained wearables and dongles.
When designing with this MCU, ensure the exposed pad is soldered to a sufficient ground copper pour for thermal dissipation and signal integrity, and follow Microchip AN463 "Layout Checklist for USB Operation" for D+/D- trace impedance. The internal 48 MHz oscillator eliminates one external crystal, but the USB bus-state pull-up resistor on D- still needs external provisioning.
Drop-in alternatives for PIC16LF1454-I/JQ — 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/JQ (same form factor and footprint) — differing in Core, Package, Program Memory (Flash), Operating Temperature, Internal Oscillator.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1455-I/JQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1459-I/JQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1454-I/JQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1454-I/ML
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →PIC16LF1454-I/PJHC
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1454T-I/JQ
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF1454-I/JQ Maximum Ratings & Electrical Characteristics
| Family | PIC16LF145x (PIC PIC® XLP™ 16F) |
| Core | Enhanced Mid-range 8-bit RISC, 49 instructions, 16 stack levels |
| Core Architecture | 8-bit Harvard (14-bit instruction word) |
| Maximum CPU Frequency | 48 MHz |
| Program Memory (Flash) | 14 KB (8K x 14) |
| Data Memory (RAM) | 1 KB (1K x 8) |
| Non-volatile Data Storage | 128 B EEPROM |
| Operating Voltage Range | 1.8 V to 3.6 V |
| General-Purpose I/O | 8 |
| USB Module | USB 2.0 full-speed device with clock recovery from USB host |
| Internal Oscillator | 48 MHz with 4x PLL |
| Package | 16-pin UQFN (4x4 mm) with exposed pad |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (industrial) |
| Temperature Grade | Industrial (I) |
PIC16LF1454-I/JQ Pin Configuration
| Pin 1 | RA5 — General-purpose I/O / ICSP data |
| Pin 2 | RA4 — General-purpose I/O |
| Pin 3 | RA3 — General-purpose I/O / MCLR (programming mode) |
| Pin 4 | RC5 — General-purpose I/O |
| Pin 5 | RC4 — General-purpose I/O |
| Pin 6 | RC3 — General-purpose I/O / AN7 |
| Pin 7 | RC2 — General-purpose I/O / AN6 |
| Pin 8 | RC1 — General-purpose I/O / AN5 / ICSPCLK |
| Pin 9 | RC0 — General-purpose I/O / AN4 |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply, 1.8 V to 3.6 V |
| Pin 12 | RA1 — General-purpose I/O / AN1 / ICSPCLK |
| Pin 13 | RA0 — General-purpose I/O / AN0 / ICSPDAT |
| Pin 14 | D+ — USB data plus (requires external series resistor and pull-up) |
| Pin 15 | D- — USB data minus |
| Pin 16 | EP — Exposed pad - thermal and ground connection |
Typical Applications
PIC16LF1454-I/JQ is suitable for 6 applications: USB HID Peripherals, USB-to-UART Bridge Dongle, USB Charger Emulator / Cable Identification, USB LED Controller Dongle, USB Sensor Interface, USB Wearable / Dongle Accessory.
USB HID Peripherals
The PIC16LF1454-I/JQ's integrated USB 2.0 full-speed SIE with clock recovery from the host and 14 KB Flash make it a fit for USB HID class devices such as keyboards, mice, game controllers, and custom input peripherals. The 48 MHz internal oscillator eliminates the external crystal that most USB MCUs require, while 1 KB RAM is sufficient for HID report buffers and a small USB stack. Sub-1 uA XLP sleep current enables battery-powered HID devices that wake on USB bus activity.
Recommended
USB-to-UART Bridge Dongle
In USB-to-UART bridge applications, the PIC16LF1454-I/JQ acts as a CDC-ACM device translating between USB and an asynchronous serial interface. The internal 48 MHz oscillator with 4x PLL provides the accurate baud-rate timing required for reliable serial communication at 115200 bps and beyond. The 16-pin UQFN footprint fits inside USB connector shells, and the 1.8 V minimum VDD allows the dongle to be powered directly from the USB 3.3 V rail without an additional LDO.
Recommended
USB Charger Emulator / Cable Identification
The PIC16LF1454-I/JQ is used in USB charger emulators that negotiate charging current with smartphones and tablets by presenting specific USB data line signatures. Its integrated USB peripheral handles the protocol states, and 8 GPIO are enough to drive LED status indicators and configuration switches. The 1.8 V minimum VDD allows direct Li-ion cell operation in portable charger packs, while 14 KB Flash accommodates protocol tables for multiple device vendors.
Recommended
USB LED Controller Dongle
USB-controlled LED strips and indicator lamps benefit from the PIC16LF1454-I/JQ's PWM peripherals combined with USB host control. The 48 MHz core generates multiple PWM channels at audio-friendly frequencies, while the integrated USB SIE receives DMX-like control packets from a host PC. The 16-pin UQFN keeps the dongle footprint below 4x4 mm, and the exposed thermal pad handles modest PWM drive currents without external heatsinking.
Recommended
USB Sensor Interface
The PIC16LF1454-I/JQ converts analog and digital sensors into USB devices, presenting measurements to a host PC via CDC or HID class. Its integrated 10-bit ADC samples sensors at sufficient rates for temperature, light, and pressure monitoring, while 14 KB Flash hosts a USB stack plus custom sensor drivers. The XLP sleep current below 1 uA extends battery life in intermittent-logging applications, and the UQFN-16 package fits inside compact sensor enclosures.
Recommended
USB Wearable / Dongle Accessory
Wearable USB accessories such as fitness dongles, security tokens, and portable data loggers use the PIC16LF1454-I/JQ for its tiny 4x4 mm footprint and sub-1 uA sleep current. The 1.8 V minimum VDD supports direct CR2032 coin-cell operation at the edge of useful life, and 14 KB Flash is enough for a USB stack plus application firmware. The exposed pad on the UQFN provides both thermal dissipation and a low-inductance ground reference for USB signaling.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1454-I/JQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1455-I/JQ | PIC16LF1459-I/JQ | PIC16F1454-I/JQ | PIC16LF1454-I/ML | PIC16LF1454T-I/JQ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | UQFN-16 (4x4 mm) | UQFN-16 (4x4 mm) - same | UQFN-16 (4x4 mm) - same | UQFN-16 (4x4 mm) - same | QFN-16 (4x4 mm) - same footprint | UQFN-16 (4x4 mm) - same |
| Flash Memory | 14 KB (8K x 14) | 16 KB (14% larger) | 16 KB | 14 KB - identical | 14 KB - identical | 14 KB - identical |
| RAM | 1 KB | 1.5 KB (+50%) | 1.5 KB | 1 KB - identical | 1 KB - identical | 1 KB - identical |
| Operating Voltage Range | 1.8 V to 3.6 V | 1.8 V to 3.6 V - identical | 1.8 V to 3.6 V - identical | 2.3 V to 5.5 V (wider, but higher min) | 1.8 V to 3.6 V - identical | 1.8 V to 3.6 V - identical |
| USB Module | USB 2.0 FS SIE with clock recovery | USB 2.0 FS SIE - identical | USB 2.0 FS SIE - identical | USB 2.0 FS SIE - identical | USB 2.0 FS SIE - identical | USB 2.0 FS SIE - identical |
| Maximum CPU Frequency | 48 MHz | 48 MHz - identical | 48 MHz - identical | 48 MHz - identical | 48 MHz - identical | 48 MHz - identical |
| GPIO Count | 8 | 8 - identical | 8 (2 extra ADC-capable) | 8 - identical | 8 - identical | 8 - identical |
| EEPROM | 128 B | 256 B (+100%) | 256 B | 128 B - identical | 128 B - identical | 128 B - identical |
Key Differentiators
- Internal 48 MHz oscillator with 4x PLL eliminates external USB crystal (vs PIC16LF1454-I/ML (same die, same family))
- Lower minimum operating voltage extends battery life on Li-ion cells (vs PIC16F1454-I/JQ)
- Larger flash headroom for richer USB stacks (vs PIC16LF1455-I/JQ)
Design Notes
The PIC16LF1454-I/JQ is a USB device, so PCB layout is critical. Place a 90 ohm differential impedance for the D+ and D- traces, route them as a matched pair with no stubs, and keep them short. Per Microchip AN463, the trace length matching should be within 150 mil. A common-mode choke is optional for EMI-sensitive designs.
Although the LF version supports 1.8 V minimum VDD, USB signaling requires a minimum 3.0 V at the D+/D- pins to meet USB-IF electrical specifications. Design with a 3.3 V nominal rail for USB operation; if running from a Li-ion cell (3.0-4.2 V), add a 3.3 V LDO such as MCP1700. Add 100 nF decoupling close to VDD plus a 4.7 uF bulk capacitor for USB transient loads.
At 48 MHz core clock with all peripherals active and 3.3 V VDD, the PIC16LF1454-I/JQ typically draws 7-9 mA, dissipating roughly 25 mW - well within the UQFN-16 thermal envelope. However, the exposed pad must be soldered to a ground copper pour of at least 10 mm^2 to provide the recommended thermal path; insufficient ground copper can lead to erratic USB operation due to ground bounce.
Do not omit the external pull-up resistor on the D- pin for full-speed USB enumeration; the internal weak pull-up is not strong enough to meet USB-IF timing. For bus-powered designs, ensure VBUS sense logic is correct so the device enumerates as a bus-powered device and stays within the 100 mA / 500 mA power budgets at suspend and configured states.
Compliance Information
RoHS compliant per DigiKey product detail. Not AEC-Q100 qualified (industrial grade only); for automotive USB applications, choose the PIC16F1454-I/JQ automotive variant or another AEC-Q100 MCU. Halogen-free status not explicitly listed in the verified data.
