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LTC1320 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1320 Datasheet(HTML) 1 Page - Linear Technology |
1 / 8 page 1 LTC1320 DESCRIPTIO S FEATURE AppleTalk© Transceiver I Single Chip Provides Complete LocalTalk©/AppleTalk© Port I Low Power: ICC = 1.2mA Typ I Shutdown Pin Reduces ICC to 30µA Typ I Drivers Maintain High Impedance in Three-State or with Power Off I 30ns Driver Propagation Delay Typ I 5ns Driver Skew Typ I Thermal Shutdown Protection I Drivers are Short-Circuit Protected The LTC1320 is an RS422/RS562 line transceiver de- signed 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 quies- cent current when active and 30 µA 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 volt- ages 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. S APPLICATI I LocalTalk Peripherals I Notebook/Palmtop Computers I Battery-Powered Systems Typical LocalTalk Connection Output Waveforms 2V/DIV 2V/DIV 5V/DIV 5V/DIV DATA IN SIGNALS ON LINE DATA OUT (REMOTE RECEIVER) 50ns/DIV APPLICATI TYPICAL 17 22Ω 100pF 22 Ω 16 22Ω 22 Ω 11 10 1 3 8 18 5V –5V 9 14 LTC1320 #1 LTC1320 • TA01 100pF 120 Ω LocalTalk TRANSFORMER DATA IN 5 4 22 Ω 22 Ω 22 Ω 100pF 22 Ω 100pF 1k 1k DATA OUT SHUTDOWN TX ENABLE RX ENABLE AppleTalk and LocalTalk are registered trademarks of Apple Computer, Inc. FOR INFORMATION PURPOSES ONLY OBSOLETE: Contact Linear Technology for Potential Replacement |
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