LTC1346A 10Mbps DCE/DTE V.35 Transceiver FEATURES DESCRIPTIO Single Chip Provides Complete Differential Signal The LTC 1346A is a single chip transceiver that provides Interface for V.35 Port the differential clock and data signals for a V.35 interface Drivers and Receivers Will Withstand Repeated from 5V supplies. Combined with an external resistor 10kV ESD Pulses termination network and an LT 1134A RS232 transceiver Operates from 5V Supplies for the control signals, the LTC1346A forms a complete low 10Mbaud Transmission Rate power DTE or DCE V.35 interface port. Meets CCITT V.35 Specification The LTC1346A features three current output differential Shutdown Mode Reduces I to Below 1A CC transmitters and three differential receivers. The transceiver Selectable Transmitter and Receiver Configurations can be configured for DTE or DCE operation or shutdown Independent Driver/Receiver Enables using three Select pins. In the Shutdown mode, the supply Transmitter Maintains High Impedance When current is reduced to below 1A. Disabled, Shut Down or with Power Off The LTC1346A transceiver operates up to 10Mbaud. All Transmitters Are Short-Circuit Protected transmitters feature short-circuit protection. Both the U transmitter outputs and the receiver outputs can be forced APPLICATIO S into a high impedance state. The transmitter outputs and Modems receiver inputs feature 10kV ESD protection. Telecommunications Data Routers , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO Clock and Data Signals for V.35 Interface 1 1 V EE1 DTE DCE V EE2 5V + 5V 0.1 F 2 2 V 0.1 F V CC1 CC2 5V LTC1346A BI BI LTC1346A 5V 0.1 F + 627T500/1250 627T500/1250 0.1 F TXD (103) 24 1 12 16 4 10 DX T T RX 23 2 11 15 SCTE (113) 22 3 10 14 5 11 DX T T RX 21 4 9 13 TXC (114) 18 14 1 24 4 9 DX RX T T 17 13 2 23 RXC (115) 16 12 3 22 5 10 DX RX T T 15 11 4 21 RXD (104) 14 10 5 20 50 125 6 11 DX = RX T T T 13 9 6 19 7 7 50 V CC2 GND (102) 8 3 8 7 8 7 3 8 V BI TECHNOLOGIES CC1 627T500/1250 (SOIC) 12 12 LTC1346 TA01 1346afa 1 + + U ULTC1346A ABSOLUTEXAI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ORDER PART Supply Voltage TOP VIEW NUMBER V .................................................................... 6.5V CC V 1 24 Y1 EE V ................................................................... 6.5V EE V 2 23 Z1 CC LTC1346ACSW Input Voltage GND 3 22 Y2 Transmitters ........................... 0.3V to (V + 0.3V) T1 4 21 Z2 CC Receivers............................................... 18V to 18V T2 5 20 Y3 S0, S1, S2 ............................... 0.3V to (V + 0.3V) T3 6 19 Z3 CC S1 7 18 A3 Output Voltage S2 8 17 B3 Transmitters .......................................... 18V to 18V R3 9 16 A2 Receivers................................ 0.3V to (V + 0.3V) CC R2 10 15 B2 Short-Circuit Duration R1 11 14 A1 Transmitter Output ..................................... Indefinite S0 12 13 B1 Receiver Output .......................................... Indefinite SW PACKAGE Operating Temperature Range 24-LEAD PLASTIC SO WIDE LTC1346AC ............................................ 0C to 70C T = 150C, = 85C/W JMAX JA Storage Temperature Range ................ 65C to 150C Lead Temperature (Soldering, 10 sec)................. 300C Consult LTC Marketing for parts specified with wider operating temperature ranges. DC ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating temperature range. V = 5V 5%, V = 5V 5% (Note 2) CC EE SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V Transmitter Differential Output Voltage 4V V 4V (Figure 1) 0.44 0.55 0.66 V OD OS V Transmitter Common Mode Output Voltage V = 0V (Figure 1) 0.6 0 0.6 V OC OS I Transmitter Output High Current V = 0V 12.6 11 9.4 mA OH Y, Z I Transmitter Output Low Current V = 0V 9.4 11 12.6 mA OL Y, Z I Transmitter Output Leakage Current 5V V 5V, S1 = S2 = 0V 1 20 A OZ Y, Z 100 A R Transmitter Output Impedance 2V V 2V 100 k O Y, Z V Differential Receiver Input Threshold Voltage 7V (V + V )/2 12V 25 200 mV TH A B V Receiver Input Hysterisis 7V (V + V )/2 12V 50 mV TH A B I Receiver Input Current (A, B) 7V V 12V 0.7 mA IN A, B R Receiver Input Impedance 7V V 12V 17.5 30 k IN A, B V Receiver Output High Voltage I = 4mA, V = 0.2V 3 4.5 V OH O A, B V Receiver Output Low Voltage I = 4mA, V = 0.2V 0.2 0.4 V OL O A, B I Receiver Output Short-Circuit Current 0V V V 740 85 mA OSR O CC I Receiver Three-State Output Current S0 = V , 0V V V 10 A OZR CC O CC V Logic Input High Voltage T, S0, S1, S2 2V IH V Logic Input Low Voltage T, S0, S1, S2 0.8 V IL I Logic Input Current T, S0, S1, S2 10 A IN 1346afa 2 U W W W U WU