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LTC1346ACSW
LTC1346A 10Mbps DCE/DTE V.35 Transceiver U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Single Chip Provides Complete Differential Signal Interface for V.35 Port Drivers and Receivers Will Withstand Repeated ±10kV ESD Pulses Operates from ±5V Supplies 10Mbaud Transmission Rate Meets CCITT V.35 Specification Shutdown Mode Reduces ICC to Below 1µA Selectable Transmitter and Receiver Configurations Independent Driver/Receiver Enables Transmitter Maintains High Impedance When Disabled, Shut Down or with Power Off Transmitters Are Short-Circuit Protected U APPLICATIO S ■ ■ ■ Modems Telecommunications Data Routers The LTC®1346A is a single chip transceiver that provides the differential clock and data signals for a V.35 interface from ±5V supplies. Combined with an external resistor termination network and an LT ®1134A RS232 transceiver for the control signals, the LTC1346A forms a complete low power DTE or DCE V.35 interface port. The LTC1346A features three current output differential transmitters and three differential receivers. The transceiver can be configured for DTE or DCE operation or shutdown using three Select pins. In the Shutdown mode, the supply current is reduced to below 1µA. The LTC1346A transceiver operates up to 10Mbaud. All transmitters feature short-circuit protection. Both the transmitter outputs and the receiver outputs can be forced into a high impedance state. The transmitter outputs and receiver inputs feature ±10kV ESD protection. , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO Clock and Data Signals for V.35 Interface 1 DTE DCE 1 2 2 VCC1 5V 0.1mF LTC1346A BI 627T500/1250 24 5 23 DX 2 3 21 DX TXD (103) 1 22 4 4 RX RX 17 13 T 15 11 T RXD (104) RX 7 VCC1 8 13 3 12 T 9 8 T 7 GND (102) 8 22 21 5 RXC (115) 23 4 T 24 3 T 13 2 TXC (114) 14 10 11 9 T 14 1 T 16 12 10 10 SCTE (113) 15 20 6 7 0.1mF VEE2 0.1mF –5V 16 11 T + LTC1346A 12 T 18 14 9 BI 627T500/1250 VCC2 5V + + VEE1 – 5V + 0.1mF 19 10 RX 11 RX DX DX DX 4 5 7 3 8 12 50W 6 T VCC2 = 125W 50W BI TECHNOLOGIES 627T500/1250 (SOIC) LTC1346 • TA01 1346afa 1
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