DESCRIPTION
The LTC®1323 is a multi-protocol line transceiver designed to operate on AppleTalk or EIA562-compatible single-ended networks while operating from a single 5V supply. There are two versions of the LTC1323 available: a 16-pin version designed to connect to an AppleTalk network, and a 24-pin version which also includes the additional single-ended drivers and receivers necessary to create an Apple-compatible serial port. An on-board charge pump generates a – 5V supply which can be used to power external devices. Additionally, the 24-pin LTC1323 features a micropower keep-alive mode during which one of the single-ended receivers is kept active to monitor external wake-up signals. The LTC1323 draws only 2.4mA quiescent current when active, 65µA in receiver keepalive mode, and 0.5µA in shutdown, making it ideal for use in battery-powered systems.

FEATURES
■ Single Chip Provides Complete LocalTalk®/AppleTalk Port
■ Operates From a Single 5V Supply
■ ESD Protection to ±10kV on Receiver Inputs and Driver Outputs
■ Low Power: ICC = 2.4mA Typ
■ Shutdown Pin Reduces ICC to 0.5µA Typ
■ Receiver Keep-Alive Function: ICC = 65µA Typ
■ Differential Driver Drives Either Differential AppleTalk or Single-Ended EIA562 Loads
■ Drivers Maintain High Impedance in Three-State or with Power Off
■ Thermal Shutdown Protection
■ Drivers are Short-Circuit Protected

APPLICATIONS
■ LocalTalk Peripherals
■ Notebook/Palmtop Computers
■ Battery-Powered Systems