LTC1320

LTC1320 AppleTalk© Transceiver U Output Waveforms 5V/DIV 2V/DIV 1k 11 22Ω 10 22Ω 9 14 –5V 22Ω 100pF 22Ω LTC1320 TA01 FEATURES s s s s DESCRIPTIO s s s s Single Chip Provides Complete LocalTalk©/AppleTalk© Port Low Power: ICC = 1.2mA Typ Shutdown Pin Reduces ICC to 30µA Typ Drivers Maintain High Impedance in Three-State or with Power Off 30ns Driver Propagation Delay Typ 5ns Driver Skew Typ Thermal Shutdown Protection Drivers are Short-Circuit Protected The LTC1320 is an RS422/RS562 line transceiver designed to operate on LocalTalk networks. It provides one differential RS422 driver, one single-ended RS562 driver, two single-ended RS562 receivers, and one differential RS422 receiver. The LTC1320 draws only 1.2mA quiescent current when active and 30µA in shutdown, making it ideal for use in battery-powered devices and other systems where power consumption is a primary concern. The LTC1320 drivers are specified to drive ± 2V into 100Ω. Additionally, the driver outputs three-state when disabled, during shutdown, or when the power is off; they maintain high impedance even with output common-mode voltages beyond the power supply rails. Both the driver outputs and receiver inputs are protected against ESD damage to beyond 5kV. The LTC1320 is available in the 18-pin SOL package. APPLICATI s s s LocalTalk Peripherals Notebook/Palmtop Computers Battery-Powered Systems AppleTalk and LocalTalk are registered trademarks of Apple Computer, Inc. TYPICAL APPLICATI Typical LocalTa...