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LT1039AISW16 Datasheet(PDF) 6 Page - Linear Technology |
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LT1039AISW16 Datasheet(HTML) 6 Page - Linear Technology |
6 / 12 page 6 LT1039A/LT1039A-16 APPLICATIONS INFORMATION The driver output stage of the LT1039A offers signifi- cantly improved protection over older bipolar and CMOS designs. In addition to current limiting, the driver output can be externally forced to ±30V with no damage or excessive current flow. LT1039A Driver – 30V 30V LT1039A OUTPUT CAN BE FORCED EXTERNALLY 1039A AI01 The driver outputs utilize high impedance overvoltage protection, eliminating the flow of fault currents into supplies, as will happen with conventional diode clamp configurations. WITH SOME DRIVERS, EXTERNALLY APPLIED VOLTAGE CAN FORCE THE SUPPLIES 1039A AI02 V + V – Older RS232 Drivers and Other CMOS Drivers Placing the LT1039A in the shutdown mode (Pin 17 low) puts both the driver and receiver outputs in a high imped- ance state. This allows data line sharing and transceiver applications. Sharing a Transmitter Line LT1039A #1 DRIVER LT1039A #2 DRIVER LOGIC INPUT A LOGIC INPUT B 1039A AI03 ON/OFF (CHANNEL SELECT) INPUT LOGIC INVERTER RS232 TRANSMISSION LINE LT1039A #1 DRIVER LOGIC TRANSMIT/RECEIVE LINE RS232 TRANSMIT/RECEIVE LINE 1039A AI05 ON/OFF (TRANSMIT/RECEIVE) INPUT LOGIC INVERTER LT1039A #2 RECEIVER Transceiver Sharing a Receiver Line LT1039A #1 RECEIVER RS232 INPUT A RS232 INPUT B 1039A AI04 ON/OFF (CHANNEL SELECT) INPUT LOGIC INVERTER LOGIC OUTPUT LT1039A #2 RECEIVER The shutdown mode also drops all supply currents (VCC, V +, V –) to zero for power conscious systems. |
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