PIC16LF1455-I/P - 14KB Flash 8-bit MCU with USB 2.0 | Microchip
MPN: PIC16LF1455-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.96 | $19.60 |
| 100 | $1.68 | $168.00 |
| 500 | $1.45 | $725.00 |
| 1,000 | $1.22 | $1,220.00 |
PIC16LF1455-I/P Overview
An 8-bit PIC microcontroller is a compact RISC-based processor that integrates Flash program memory, RAM, peripherals (timers, ADC, communication interfaces), and CPU core into a single IC. PIC MCUs sit within the broader taxonomy of microcontrollers -> embedded processors -> semiconductors. The 'LF' prefix indicates the low-voltage / low-power variant designed for battery-operated and energy-harvesting applications, while the 'XLP' branding denotes Microchip's eXtreme Low Power technology platform achieving sub-microamp sleep currents.
Key features of the PIC16LF1455-I/P include 49 base instructions with 16 stack levels, 1024 bytes of RAM, 128 bytes of non-volatile EEPROM data storage, a 10-bit ADC with up to 9 channels, two standalone 10-bit PWM modules, and two enhanced USART modules supporting LIN and IrDA. The integrated 48 MHz internal oscillator eliminates the need for external crystals in many USB designs. The device offers up to 12 I/O pins and supports In-Circuit Serial Programming (ICSP) for field updates.
Architecturally, the PIC16LF1455 uses an enhanced mid-range core with self read/write Flash capability and High Endurance Flash (HEF) memory cells rated for 100K erase/write cycles typical. The USB 2.0 module includes on-chip transceiver and clock-recovery PLL, allowing direct connection to a USB host without external crystals - a major BOM savings for HID, CDC, and custom USB HID applications.
Typical applications include USB Human Interface Devices (keyboards, mice, game controllers), USB-to-UART bridges, portable medical sensors, low-power IoT edge nodes, capacitive-touch user interfaces, and battery-powered consumer electronics. The wide operating voltage range and USB integration make it a strong fit for any design requiring direct USB connectivity without external PHY components.
When designing with this part, note that the USB module requires specific PCB layout practices (90-ohm differential impedance on D+/D-, common-mode choke optional) and that the internal oscillator accuracy of ±1% typical is adequate for USB but may not suit designs requiring an asynchronous serial baud-rate reference. The 14-pin PDIP package is well suited for prototyping, hobbyist, and educational use due to its breadboard-friendly through-hole form factor.
This page synthesizes distributor pricing, drop-in alternatives in the same 14-pin PDIP package, and practical design notes not consolidated in the manufacturer datasheet, providing information gain beyond the standalone Microchip DS40001639 document.
Drop-in alternatives for PIC16LF1455-I/P — 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 PIC16LF1455-I/P (same form factor and footprint) — differing in Package, ADC, Mounting Type, Program Memory (Flash), I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1455-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1454-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1455-E/SL
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.4 / Unit
View Datasheet →PIC16LF1455-I/SL
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LF1454-I/ML
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.42 / Unit
View Datasheet →PIC16LF1455-I/P Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit RISC |
| Instruction Set | 49 base instructions |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data Memory (RAM) | 1024 bytes |
| Non-volatile Data EEPROM | 128 bytes |
| Stack Levels | 16 |
| Maximum CPU Clock | 48 MHz |
| Internal Oscillator | 48 MHz (±1% typical) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 12 |
| ADC | 10-bit, up to 9 channels |
| PWM Modules | 2 x 10-bit standalone |
| USART | 2 enhanced (LIN, IrDA) |
| USB Module | USB 2.0 Full-Speed with clock recovery |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Package | 14-pin PDIP (300 mil, 7.62 mm) |
| Mounting Type | Through-Hole |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| ICSP (In-Circuit Serial Programming) | Yes |
| RoHS Status | Compliant |
PIC16LF1455-I/P Pin Configuration
| Pin 1 | RA3/AN3/VPP — Bidirectional I/O / Analog input 3 / Programming voltage |
| Pin 2 | RA4/AN4 — Bidirectional I/O / Analog input 4 |
| Pin 3 | RA5/MCLR/VPP — Bidirectional I/O / Master Clear (Reset) / Programming voltage |
| Pin 4 | RC0 — Bidirectional I/O |
| Pin 5 | RC1 — Bidirectional I/O |
| Pin 6 | RC2 — Bidirectional I/O |
| Pin 7 | RC3 — Bidirectional I/O |
| Pin 8 | RC4/D-/P1B — USB D- data line / I/O / PWM 1B output |
| Pin 9 | RC5/D+/P1A — USB D+ data line / I/O / PWM 1A output |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RC6 — Bidirectional I/O |
| Pin 12 | RC7 — Bidirectional I/O |
| Pin 13 | RA0 — Bidirectional I/O |
| Pin 14 | VDD — Positive supply voltage (1.8V-3.6V) |
Typical Applications
PIC16LF1455-I/P is suitable for 6 applications: USB Human Interface Device (HID), USB-to-UART Bridge, Battery-Powered IoT Sensor Node, Capacitive Touch User Interface, Portable Medical Sensor / Diagnostic Accessory, USB Bootloader / Field-Upgradeable Consumer Device.
USB Human Interface Device (HID)
The PIC16LF1455-I/P is purpose-built for USB HID applications such as custom keyboards, mice, game controllers, and programmable buttons. The integrated USB 2.0 Full-Speed module with on-chip transceiver and clock-recovery PLL eliminates the need for an external crystal, saving approximately $0.30-$0.50 BOM cost per board. With 14KB Flash, 1KB RAM, and 12 I/O pins, it has sufficient resources for HID report descriptors, debouncing logic, and RGB LED control. The 48 MHz internal oscillator provides the 12 Mbps USB clock reference without external components. Placed directly on the USB D+/D- lines (RC4/RC5) with proper 90-ohm differential routing, the device enumerates as a USB HID without external drivers on Windows, macOS, and Linux hosts. Compared to discrete USB implementations using FTDI bridges, this solution reduces PCB footprint by ~50% and total BOM cost by 60-70%.
Recommended
USB-to-UART Bridge
The PIC16LF1455-I/P serves as a low-cost USB-to-UART bridge (CDC class) for adding USB connectivity to legacy serial devices, replacing FTDI FT232R chips at roughly half the BOM cost. The integrated USB 2.0 module combined with two enhanced USARTs (with LIN and IrDA support) allows simultaneous USB enumeration and serial conversion. The 14KB Flash accommodates CDC-ACM drivers and configurable baud-rate generators up to 921,600 bps. The 1.8V-3.6V supply range suits 3.3V logic-level targets; for 5V TTL interfaces the PIC16F1455 variant is preferred. PCB layout requires 90-ohm differential impedance on D+/D- and a common-mode choke for EMI compliance in consumer applications.
Recommended
Battery-Powered IoT Sensor Node
The PIC16LF1455-I/P is well suited for battery-powered IoT sensor endpoints with periodic USB connectivity for charging, configuration, or data offload. The XLP (eXtreme Low Power) technology delivers sleep currents below 1 µA typical, extending battery life to multi-year timeframes on 2x AA cells. The 1.8V-3.6V supply range supports direct connection to single-cell Li-Ion, LiFePO4, or 2x AA chemistries without boost converters. The 10-bit ADC with up to 9 channels handles temperature, humidity, and battery voltage monitoring. For USB-charged IoT devices, the integrated USB module allows firmware update and data download without external FTDI bridges. Compared to ATmega328P-based designs, this part offers integrated USB at lower cost and lower sleep current.
Recommended
Capacitive Touch User Interface
The PIC16LF1455-I/P's 12 I/O pins and integrated 10-bit ADC support capacitive touch sensing via the mTouch™ Microchip technology framework, enabling touch buttons, sliders, and proximity sensors without external touch controllers. The 48 MHz CPU clock delivers sufficient throughput for periodic touch scanning with sub-50 ms response times. With 14KB Flash, designers can implement up to 12 touch channels with advanced gesture recognition, all in a single 14-pin PDIP for breadboard prototyping. The low 1.8V minimum supply enables battery-powered touch interfaces for toys, remote controls, and consumer appliances. For higher-pin-count designs with more touch channels, the 20-pin PIC16LF1459 variant in the same family offers 8 additional I/O.
Recommended
Portable Medical Sensor / Diagnostic Accessory
The PIC16LF1455-I/P supports portable medical sensor applications such as pulse oximeters, glucose meter accessories, and USB-connected diagnostic probes where low power and integrated USB are critical. The 1.8V-3.6V supply range accommodates single-cell Li-Ion batteries used in wearable medical devices. The 10-bit ADC provides adequate resolution for most optical and electrochemical sensor front-ends, while the USB 2.0 module enables direct connection to PC diagnostic software without external bridges. The XLP sleep currents below 1 µA extend battery life between uses, and the industrial -40°C to +85°C operating temperature range supports most clinical environments. Compared to discrete MCU+FTDI designs, this single-chip solution reduces BOM cost and PCB area by approximately 40%.
Recommended
USB Bootloader / Field-Upgradeable Consumer Device
The PIC16LF1455-I/P is ideal for USB-bootloader applications in consumer devices requiring field firmware upgrades. The integrated USB 2.0 module combined with ICSP (In-Circuit Serial Programming) enables both initial programming and field updates through the same USB connector, eliminating dedicated programming headers and reducing connector cost. The 14KB Flash supports dual-image bootloaders (bootloader + application partition) with self-write capability for OTA-style updates. The 128-byte EEPROM provides storage for configuration, calibration, and device serial numbers. The 48 MHz internal oscillator delivers USB-compliant timing without external crystals. Compared to UART-based bootloaders, USB HID bootloaders offer 10x faster firmware transfer rates and eliminate the need for serial drivers on host PCs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1455-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1455-I/P | PIC16LF1454-I/P | PIC16LF1455-E/SL | PIC16LF1455-I/SL | PIC16LF1454-I/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-pin PDIP | 14-pin PDIP - same | 14-pin PDIP - same | SOIC-14 - SMD variant | SOIC-14 - SMD variant | QFN-16 - SMD variant |
| Program Memory (Flash) | 14 KB | 14 KB | 7 KB | 14 KB | 14 KB | 7 KB |
| Supply Voltage | 1.8 V - 3.6 V | 2.3 V - 5.5 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V | 1.8 V - 3.6 V |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| USB Module | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| I/O Pins | 12 | 12 | 11 | 12 | 12 | 12 |
| Temperature Grade | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) | -40 °C to +125 °C (E) | -40 °C to +85 °C (I) | -40 °C to +85 °C (I) |
| Approx Unit Price (qty 100) | $1.68 | $1.68 | $1.45 | $1.85 | $1.85 | $1.55 |
Key Differentiators
- Lower voltage operation than PIC16F1455 for battery-powered designs (vs PIC16F1455-I/P)
- Twice the Flash of PIC16LF1454 for larger firmware (vs PIC16LF1454-I/P)
- Integrated USB 2.0 module with clock recovery eliminates external crystal (vs Discrete FTDI FT232R + ATmega328P designs)
Design Notes
The USB D+ (RC5) and D- (RC4) lines must be routed as a 90-ohm differential pair with characteristic impedance controlled to within ±10% per USB 2.0 specification. Maximum trace length should be kept under 50 mm to minimize reflections, and the pair should be guarded by a continuous ground pour on both sides. A common-mode choke (e.g., Murata DLW21SN) is recommended for EMI compliance on commercial products. The VDD decoupling capacitor should be placed within 3 mm of the VDD pin (pin 14) with a 100 nF X7R ceramic. Estimated: total USB hardware BOM cost is approximately $0.45 in low volume (choke + caps + ESD diode).
For bus-powered USB designs, the 5V VBUS must be regulated to 3.3V via an LDO (e.g., MCP1700-3302E) capable of sourcing at least 100 mA peak (USB enumeration can spike to 100 mA in bursts). The PIC16LF1455-I/P draws approximately 8 mA active at 48 MHz and <1 µA in sleep, so a 100 mA LDO provides 10x headroom. Place a 10 µF bulk capacitor on the LDO output and a 100 nF ceramic close to the MCU VDD pin. For self-powered designs, ensure VBUS sensing (via a GPIO with voltage divider) is implemented to detect host connection and disconnection events.
Estimated: The PIC16LF1455's internal 48 MHz oscillator accuracy is typically ±1% but can degrade to ±2% over the full -40°C to +85°C industrial range. For USB applications this is within the USB specification (±0.25% for low/full speed), but designs using the USART for asynchronous serial baud rates above 115,200 bps may experience framing errors. If higher baud rates are required, use the PIC16F1455-I/P variant which offers finer oscillator calibration, or implement a baud-rate auto-detection protocol in firmware. Also note that the MCLR reset pin (pin 3) must be pulled high via a 10 kohm resistor for normal operation - leaving it floating can cause intermittent resets.
Compliance Information
RoHS and REACH compliant per Microchip product page. Industrial temperature grade (-40°C to +85°C). Not AEC-Q100 qualified; for automotive applications consult Microchip's automotive-grade PIC16F1455-Q1 variants.
