PIC16LF1454-E/ST - 8-bit USB MCU 14KB Flash XLP 14-TSSOP
MPN: PIC16LF1454-E/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.77 | $1.77 |
| 10 | $1.6 | $16.00 |
| 100 | $1.42 | $142.00 |
| 500 | $1.25 | $625.00 |
| 1,000 | $1.1 | $1,100.00 |
PIC16LF1454-E/ST Overview
The PIC16F1454 family is an enhanced mid-range 8-bit CMOS microcontroller using Microchip's PIC RISC architecture, which delivers 200 ns instruction execution and balances powerful peripherals with a small footprint. Within the broader taxonomy it sits as a microcontroller -> 8-bit MCU -> PIC16 family -> power-managed USB device. PIC microcontrollers are widely recognized as low-power, easy-to-program embedded controllers that simplify USB connectivity in cost-sensitive designs.
Key differentiating features include 14 KB Flash with self read/write capability, 128 B of non-volatile data storage (HEF), 512 bytes of SRAM, a 48 MHz internal oscillator eliminating external crystals, a Universal Serial Bus 2.0 module with on-chip clock recovery from the USB host, a Master I2C/SPI module, and XLP (eXtreme Low Power) technology for sleep currents down to the nanoampere range. Twelve I/O pins give designers flexibility for human-interface, sensing, or communication side-channels alongside USB.
Typical applications cover USB HID peripherals such as keyboards, mice, and game controllers, USB-to-UART bridges and CDC virtual COM ports, low-power sensor nodes with USB debug, capacitive-touch human-interface devices, and industrial data-loggers that need bus-powered enumeration. The wide 2.0-3.6 V operating range is ideal for Li-ion or 3.3 V regulated rails.
When laying out a board, route the USB D+/D- differential pair with 90 ohm impedance and place the optional 27 ohm series resistors close to the MCU. Confirm that the ICSP/ICD pins are accessible for in-circuit programming and debugging. This page consolidates distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LF1454-E/ST — 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-E/ST (same form factor and footprint) — differing in Package, Operating Temperature, Instruction Set, Core, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1454-I/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.41 / Unit
View Datasheet →PIC16LF1454-E/JQ
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1454-E/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1454-I/ST
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16F1454-E/ST
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC16LF1455-E/ST
✅ Drop-In✓ In Stock
$0.99 / Unit
View Datasheet →PIC16LF1454-E/ST Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data EEPROM (HEF) | 128 B non-volatile |
| SRAM | 512 B |
| Maximum CPU Speed | 48 MHz |
| Instruction Execution | 200 ns (per instruction) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| I/O Pins | 12 |
| USB Module | USB 2.0 Full-Speed with on-chip clock recovery |
| Internal Oscillator | 48 MHz (no external crystal required) |
| Serial Interfaces | MI2C / SPI (Master) |
| Stack Levels | 16 |
| Operating Temperature | -40C to +125C (E grade) |
| Package | 14-TSSOP (0.173 in / 4.40 mm width) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (per Microchip packaging spec) |
| RoHS Status | Compliant |
| Lead-free | Yes |
PIC16LF1454-E/ST Pin Configuration
| Pin 1 | VDD — Positive supply voltage (2.0 V to 3.6 V) |
| Pin 2 | RA5 — Bidirectional I/O / ICSP data |
| Pin 3 | RA4 — Bidirectional I/O |
| Pin 4 | RA3/MCLR — Bidirectional I/O or Master Clear (reset) input |
| Pin 5 | RC5 — Bidirectional I/O |
| Pin 6 | RC4 — Bidirectional I/O |
| Pin 7 | RC3 — Bidirectional I/O |
| Pin 8 | RC2 — Bidirectional I/O |
| Pin 9 | RC1 — Bidirectional I/O |
| Pin 10 | RC0 — Bidirectional I/O |
| Pin 11 | D- — USB D- data line (also ICSP clock) |
| Pin 12 | D+ — USB D+ data line (also ICSP data) |
| Pin 13 | RB7 — Bidirectional I/O / ICSP data |
| Pin 14 | VSS — Ground reference |
Typical Applications
PIC16LF1454-E/ST is suitable for 7 applications: USB HID Peripherals, USB-to-UART CDC Bridge, Industrial Data Loggers, Capacitive-Touch User Interface, Portable Sensor Hubs, USB-Powered Lighting Controllers, Educational Development Boards.
USB HID Peripherals
The PIC16LF1454-E/ST is purpose-built for low-cost USB Human Interface Devices because its integrated USB 2.0 Full-Speed transceiver with on-chip clock recovery eliminates the external 12 MHz crystal traditionally required for USB. Operating from 2.0-3.6 V, the part runs directly from a 3.3 V regulator fed by the USB bus or a Li-ion cell. With 14 KB of Flash, designers can fit HID class descriptors plus application logic for keyboards, mice, gamepads, and consumer-control devices. The 48 MHz enhanced mid-range core delivers 200 ns instruction execution, leaving headroom for debounced key scanning, LED PWM, and capacitive-touch sensing using the on-chip peripherals.
Recommended
USB-to-UART CDC Bridge
The PIC16LF1454-E/ST is a strong fit for USB-to-UART bridges because its USB 2.0 Full-Speed device plus master I2C/SPI peripherals can implement a CDC virtual COM port without external crystals, reducing BOM cost. The 48 MHz core sustains 115200 baud reliably with the on-chip UART, and 512 B of SRAM buffers small command frames. The 2.0-3.6 V VDD matches common 3.3 V level translation needs, while the XLP nanoWatt sleep lowers standby draw when the host suspends the bus. Use it to add a debug console to industrial sensors or to retrofit legacy RS-232 equipment with a USB-C connector.
Recommended
Industrial Data Loggers
The PIC16LF1454-E/ST suits industrial data loggers because its -40C to +125C extended temperature grade and 2.0-3.6 V supply tolerate harsh factory floors and battery-backed operation. The 14 KB Flash and 128 B HEEP retain calibration constants and event records through power cycles, while the 512 B SRAM holds runtime measurements. The USB interface allows field technicians to offload logs via plug-and-play, and the on-chip 48 MHz oscillator eliminates mechanical crystals that would fail under vibration. XLP sleep current of ~20 nA extends multi-year deployments on a single coin cell when USB is detached.
Recommended
Capacitive-Touch User Interface
The PIC16LF1454-E/ST enables compact capacitive-touch interfaces because its 12 I/O pins, 48 MHz core, and on-chip mTouch peripheral can drive proximity buttons, sliders, and wheel gestures without an external touch controller. The integrated USB module streams HID digitizer reports to a host PC, while the XLP sleep mode idles between touches at nanowatt levels for battery-powered remotes. With 14 KB of Flash, designers can include gesture recognition, debounce logic, and LED feedback PWM in firmware. The 14-TSSOP package keeps the PCB under 1 square centimeter even with USB-C and a capacitive sensor pattern.
Recommended
Portable Sensor Hubs
The PIC16LF1454-E/ST is well-suited to portable sensor hubs because its master I2C/SPI interface aggregates sensors, its USB device port offers both charging input and data uplink, and its 2.0 V minimum VDD lets it run directly from a single-cell Li-ion or two AA batteries. With 14 KB Flash and 512 B SRAM, designers can implement BLE-style data forwarding via USB CDC, store factory calibration in the 128 B HEEP, and use the 48 MHz core for sensor fusion. The -40C to +125C operating range supports outdoor environmental, agricultural, and asset-tracking deployments.
Recommended
USB-Powered Lighting Controllers
The PIC16LF1454-E/ST fits USB-powered architectural and stage-lighting controllers because its USB interface enumerates as a DMX-512 or vendor-class device, its 48 MHz core generates PWM output for LED dimming, and its 2.0-3.6 V supply matches the LED string current. The XLP sleep mode lets controllers idle below 1 microamp when the host suspends the USB bus, complying with energy-starving standby requirements. The 14 KB Flash accommodates DMX personality tables, color-rendering macros, and bootloader code for field firmware updates.
Recommended
Educational Development Boards
The PIC16LF1454-E/ST is a popular MCU for entry-level USB development boards because its integrated USB eliminates the external crystal complexity that historically deterred beginners. With 14 KB Flash, students can compile, program, and debug USB HID, CDC, and vendor-class examples via the on-board ICSP header. The 14-TSSOP footprint is breadboard-friendly on carrier PCBs, and Microchip's free MPLAB X IDE plus XC8 compiler provides a complete tool chain. The wide operating voltage range allows experimentation with battery, USB-bus, and bench-supply power scenarios.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1454-E/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1454-I/ST | PIC16LF1454-E/JQ | PIC16F1454-I/ST | PIC16F1454-E/ST | PIC16LF1455-E/ST |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same |
| Operating Voltage (V) | 2.0 to 3.6 | 2.0 to 3.6 | 2.0 to 3.6 | 2.3 to 5.5 | 2.3 to 5.5 | 2.0 to 3.6 |
| Flash Memory | 14 KB | 14 KB | 14 KB | 14 KB | 14 KB | 16 KB |
| Temperature Grade | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) |
| USB 2.0 Module | Yes (with clock recovery) | Yes | Yes | Yes | Yes | Yes |
| Maximum CPU Speed | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| RoHS / Lead-free | Compliant / Yes | Compliant / Yes | Compliant / Yes | Compliant / Yes | Compliant / Yes | Compliant / Yes |
Key Differentiators
- Lowest minimum VDD in the PIC16F1454 family at 2.0 V (vs PIC16F1454-I/ST)
- Extended industrial -40C to +125C temperature grade (vs PIC16LF1454-I/ST)
- 14 KB Flash with self read/write plus 128 B HEEP data storage (vs PIC16LF1455-E/ST)
Design Notes
Route the USB D+ and D- pair as a 90 ohm differential pair with matched length and continuous reference plane, keeping series ferrite or 27 ohm resistors within 4 mm of the MCU pins. Place a 0.1 uF ceramic decoupling cap within 3 mm of VDD (pin 1) and a 10 uF bulk cap near the regulator output. Reserve a 5-pin ICSP header connected to MCLR, VDD, VSS, and the ICSP pins multiplexed with D+/D- to enable in-circuit programming without disabling USB communication.
The LF process draws only 20 nA in sleep mode with the Watchdog Timer disabled, but adding pull-ups or peripherals raises this figure quickly. Estimated: with the USB module active and 12 I/O pins configured as inputs, total idle current rises to approximately 1.5 mA. Use the on-chip voltage regulator's low-power sleep macro to drop below 1 microamp before long-term storage, and duty-cycle the USB attach in battery designs to extend runtime into the months range on a single CR2032.
The ICSP/ICD clock and data pins are multiplexed with USB D+ and D- per Northern Software's PIC16LF1454 device notes, so an in-circuit debugger can disturb USB enumeration if connected during bus traffic. Decouple MCLR with a 10 kohm pull-up to VDD to prevent spurious resets during USB hot-plug events. Do not exceed the absolute maximum VDD of 3.6 V - the LF process is not 5 V tolerant, so level-shift any 5 V signals externally. Finally, verify the LF1454 firmware configures the on-chip regulator to run from the USB 3.3 V rail rather than the internal low-power LDO when USB is active.
Compliance Information
RoHS compliant and lead-free per Microchip product page and Heisener spec sheet; -40C to +125C E grade satisfies industrial extended temperature requirements.
