UR5HCFJL-FB Datasheet | SEMTECH

Green Coder TM UR5HCFJL Zero-Power TM Keyboard Encoder for Portable Systems HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODERTM FAMILY DESCRIPTION The Green Coder (UR5HCFJL) is a unique, Zero-Power TM keyboard encoder that provides an optimum performance level for both batteryoperated and desktop systems. Features - Optimized power-saving operation with idle consumption of less than 2 µA - Programmable LED dimming for further power savings - Ready to interface to Fujitsu's 7316, 7654,7656, and 1406 keyboards - 3, 3.3 and 5 Volt operation APPLICATIONS - Laptop/Notebook - Portable Equipment - Energy Star pliant - Medical Instruments - Palmtops/ PDAs - Wakes-up only to respond to an external event and for a minimum period of time (2 m A current consumption) - Provides interface for external keyboard/keypad or other 8042patible device - Custom versions available in small or large quantities The Green Coder TM scans, debounces and encodes an 8 X 16 keyboard matrix, and will provide direct drive for 3 LEDs and two bi-directional channels for munication with a BIOSpatible system as well as an additional keyboard-patible device. It fully supports all three PS/2 scan code sets and will implement up to three alternate keyboard layers for full 101/102 functionality. The Green Coder TM employs a unique Self-Power Management TM method that reduces the power consumption of the keyboard sub-system to an unprecedented minimum, transparently and without user intervention. In “Active” mode, the encoder consumes less than 2 m A (Typ @5V). In “Sleep” mode the encoder consumes less than 2 µA (Typ @5V) The encoder can even nap between keystrokes and therefore it is rarely active and rarely consumes significant levels of power. A "stand-by" mode (600 µA Typ @5V) is entered for as long as a periodic task is active. After a programmed period of user inactivity the Green Coder TM gradually dims the LEDs for further power savings. The Green Coder TM is ideal for use in battery laptop/notebook...