PIC16F1459-I/SO
PIC16F1459-I/SO - 8-Bit 48MHz 14KB Flash USB MCU | Microchip
The Microchip Technology PIC16F1459-I/SO is an 8-bit enhanced mid-range PIC microcontroller with integrated USB 2.0 full-speed support, 14KB Flash program memory, 1KB RAM, and a 48MHz internal oscillator, housed in a 20-pin SOIC package. Key specifications include 14-bit instruction word architecture, 49 base instructions, 16 stack levels, 128 bytes of non-volatile data EEPROM, and 18 I/O pins. The device operates from 2.5V to 5.5V and is built on Microchip's XLP (eXtreme Low Power) process.
What is a PIC microcontroller? A PIC (Peripheral Interface Controller) is a family of Harvard-architecture microcontrollers made by Microchip Technology. PIC MCUs combine a CPU core, Flash program memory, RAM, EEPROM, and configurable peripherals (ADC, PWM, timers, communication modules) on a single die. The PIC16F series is the enhanced mid-range family that sits between the baseline PIC10/12/16 and the high-performance PIC18 and dsPIC lines - it offers USB connectivity, C-friendly peripherals, and XLP sleep currents below 1 µA in the right configuration. PIC microcontrollers dominate 8-bit embedded designs because of the free MPLAB X toolchain, the vast library of application notes, and the XC8 C compiler.
Key differentiating features of the PIC16F1459 include the on-chip USB 2.0 module with clock recovery from the USB host (no external crystal required for USB), a 48MHz high-speed internal oscillator accurate to within ±0.25% over voltage and temperature after calibration, a 10-bit ADC with up to 12 channels, two standalone PWM modules, and two analog comparators. The high-endurance Flash (HEF) supports 100K erase/write cycles for data logging, and the 128-byte EEPROM adds non-volatile storage for user parameters. XLP technology keeps the active current around 1.8 mA at 4 MHz and deep sleep currents below 1 µA.
Architecturally, the PIC16F1459 uses a 14-bit wide instruction word, an 8-bit data path, two hardware stack levels (16 entries), and a vectored interrupt controller. The USB SIE (Serial Interface Engine) handles NRZI encoding, bit stuffing, and CRC in hardware, freeing the core from real-time USB traffic. The 48 MHz HFINTOSC is phase-locked to the USB Start-of-Frame packets when USB is active, which is what enables crystal-less USB operation. The device also exposes the configurable logic cell (CLC) and numerically controlled oscillator (NCO) peripherals that allow small custom logic functions in hardware.
Typical applications include low-cost USB HID peripherals (keyboards, mice, custom input devices), USB-to-UART bridges, LED lighting controllers, capacitive-touch user interfaces, small sensor hubs with USB diagnostics, and consumer toys. The 20-pin SOIC footprint makes it easy to hand-solder prototypes and drop onto a 4-layer or 2-layer consumer board.
When designing with this device, plan the VUSB pin carefully - it requires an internal 3.3V regulator that can source up to 50 mA, and decoupling must follow the datasheet reference layout. For non-USB applications, the PIC16F1454 and PIC16F1455 are smaller siblings in the same package family, while the PIC16F1509 and PIC16F1512 are drop-in upgrades when more RAM, more Flash, or more peripherals are needed.
This page synthesizes distributor stock, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
見積もり
お問い合わせ