PIC16F1455-I/JQ
PIC16F1455-I/JQ - 14KB Flash USB MCU 48MHz | Microchip
The Microchip PIC16F1455-I/JQ is an 8-bit PIC16F microcontroller with 14KB Flash, 1KB RAM, integrated USB 2.0 full-speed transceiver, and a 48MHz internal oscillator, housed in a 16-pin UQFN (4x4 mm) package with exposed pad. It belongs to the eXtreme Low Power (XLP) family, delivering 49 instructions across 16 stack levels and supporting self read/write Flash memory with High Endurance Flash (HEF) technology.
A microcontroller (MCU) is a single-chip computer containing a CPU, Flash program memory, SRAM data memory, EEPROM, and a rich set of peripherals such as timers, ADC, communication interfaces, and I/O ports. PIC microcontrollers use a modified Harvard RISC architecture that executes one instruction per clock cycle (except branches), enabling deterministic timing and high code efficiency. The PIC16F1455 sits at the intersection of mainstream 8-bit PIC MCUs and USB-enabled devices, making it a popular choice for low-cost USB peripherals, HID-class devices, and embedded sensors. Within Microchip's taxonomy, the PIC16F1455 belongs to the enhanced mid-range PIC16F1xxx family, which extends the classic PIC16F baseline with linear program memory and more peripherals.
Key features include 14KB (8K x 14) self-programmable Flash with 128 bytes of non-volatile data storage, 1KB RAM, 8 general-purpose I/O pins, an integrated 48MHz precision internal oscillator, an on-chip USB 2.0 full-speed module with clock recovery from host, two standalone 10-bit PWM modules, a 10-bit ADC with up to 8 channels, and an operating voltage range of 2.3V to 5.5V (industrial temperature range -40C to +85C). The UQFN-16 (4x4 mm) package with exposed thermal pad supports very compact PCB designs and provides excellent thermal performance for the small package footprint.
The USB module includes a dedicated 3.3V internal regulator and on-chip transceiver, eliminating the need for external crystals for low-speed and full-speed USB. Combined with the 48MHz internal oscillator and a peripheral pin select (PPS) system, the PIC16F1455 reduces BOM cost for USB HID, CDC, and custom-class devices. The HEF Flash supports 100K erase/write cycles, suitable for data logging and parameter storage.
Typical applications include USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges, LED lighting controllers, low-power sensor nodes, consumer electronics with USB charging monitoring, and industrial control panels requiring USB diagnostics. The XLP feature set enables sleep currents below 1 uA, making the part attractive for battery-powered devices.
When designing with this part, place a 0.1 uF decoupling capacitor as close as possible to the VDD pin and connect the exposed thermal pad to the ground plane for thermal and electrical performance. The USB D+/D- traces should be routed as a 90-ohm differential pair and kept as short as possible. For bus-powered designs, the internal 3.3V regulator can supply up to ~50 mA to external circuitry, but verify against USB inrush current limits.
This page synthesizes distributor pricing, drop-in alternatives within the PIC16F1xxx family, USB design notes, and practical engineering guidance that goes beyond what the manufacturer datasheet alone provides.
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