SHUTDOWN CURRENT ( A) LTC1385 3.3V Low Power EIA/TIA-562 Transceiver FEATURES DESCRIPTIO n Operates from a Single 3.3V Supply The LTC 1385 is an ultra-low power, 2-driver/2-receiver n Low Supply Current: I = 200m A EIA/TIA-562 transceiver which operates from a single CC n I = 35m A in Driver Disable Mode 3.3V supply. The charge pump requires only four space- CC n I = 0.2m A in Shutdown Mode saving 0.1m F capacitors. CC n ESD Protection Over 10kV The transceiver operates in one of three modes: Normal, n Uses Small Capacitors: 0.1m F Driver Disable or Shutdown. In the Normal mode, I is CC n Operates to 120kBaud only 200m A in the unloaded condition. In the Driver Disable n Output Overvoltage Does Not Force Current mode, the charge pump is turned off, the driver outputs Back into Supplies are forced into three-state, both receivers are kept active, n EIA/TIA-562 I/O Lines Can Be Forced to 25V and I drops to 35m A. In the Shutdown mode, everything CC Without Damage is turned off and I drops to 0.2m A. CC n Pin Compatible with LT1180A The LTC1385 is fully compliant with all data rate and U overvoltage EIA / TIA-562 specifications. The transceiver APPLICATIO S can operate up to 120kbaud with a 1000pF, 3kW load. n Notebook Computers Both driver outputs and receiver inputs can be forced to n Palmtop Computers 25V without damage, and can survive multiple 10kV ESD strikes. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO 2-Drivers/2-Receivers with Shutdown Quiescent and Shutdown Supply Current and Driver Disable vs Temperature 600 1.2 17 2 V = 3.3V CC LTC1385 0.1m F 3 4 500 1.0 7 5 m 0.1m F V 6 CC 0.1m F 0.1m F 400 0.8 300k 12 15 LOGIC INPUT 562 OUTPUT QUIESCENT 300 0.6 V CC CURRENT 300k 11 8 200 0.4 LOGIC INPUT 562 OUTPUT m 14 13 LOGIC OUTPUT 562 INPUT 100 0.2 SHUTDOWN 5k CURRENT 10 9 562 INPUT LOGIC OUTPUT 0 0 20 0 20 40 60 80 5k 16 18 TEMPERATURE (C) ON/OFF TEST CONDITION: V = 3.3V CC 1 LTC1385 TA02 LTC1385 TA01 DRIVER DISABLE sn1385 1385fas 1 QUIESCENT CURRENT ( A) U ULTC1385 ABSOLUTE AXI U RATI GS Supply Voltage (V ) ................................................ 5V Short-Circuit Duration CC + Input Voltage V ................................................................... 30 sec Driver ....................................... 0.3V to V + 0.3V V ................................................................... 30 sec CC Receiver ............................................... 25V to 25V Driver Output .............................................. Indefinite Digital Input ............................... 0.3V to V + 0.3V Receiver Output .......................................... Indefinite CC Output Voltage Operating Temperature Range Driver .................................................... 25V to 25V LTC1385C ............................................. 0 C to 70 C Receiver .................................... 0.3V to V + 0.3V LTC1385I........................................... 40 C to 85 C CC Storage Temperature Range ................ 65 C to 150 C Lead Temperature (Soldering, 10 sec)................. 300 C UUW PACKAGE/ORDER I FOR ATIO TOP VIEW ORDER PART ORDER PART TOP VIEW DRIVER NUMBER NUMBER 1 20 ON/OFF DISABLE DRIVER 1 18 ON/OFF + DISABLE C1 2 19 VCC + C1 2 17 V CC + V 3 18 GND LTC1385CG LTC1385CN + 3 V 16 GND C1 4 17 TR1 OUT LTC1385IG LTC1385CSW 4 C1 15 TR1 OUT + C2 5 16 RX1 IN + LTC1385IN 5 C2 14 RX1 IN C2 6 15 RX1 OUT LTC1385ISW 6 13 C2 RX1 OUT V 7 14 TR1 IN 7 12 V TR1 IN TR2 OUT 8 13 TR2 IN 8 11 TR2 OUT TR2 IN RX2 IN 9 12 RX2 OUT 9 10 RX2 IN RX2 OUT NC 10 11 NC N PACKAGE SW PACKAGE G PACKAGE 18-LEAD PDIP 18-LEAD PLASTIC SO 20-LEAD SSOP T = 125 C, q = 135 C/W T = 125 C, q = 85 C/W JMAX JA JMAX JA Consult LTC Marketing for parts specified with wider operating temperature ranges. DC ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature range. V = 3.3V, C1 = C2 = C3 = C4 = 0.1m F, V = V , Driver Disable = V , unless noted. CC ON/OFF CC CC PARAMETER CONDITIONS MIN TYP MAX UNITS Any Driver Output Voltage Swing 3k to GND Positive l 3.7 4.5 V Negative l 3.7 4.5 V Logic Input Voltage Level Input Low Level (V = High) l 1.4 0.8 V OUT Input High Level (V = Low) l 2.0 1.4 V OUT Logic Input Current V = V l 5 m A IN CC V = 0V l 20 40 m A IN Output Short-Circuit Current V = 0V 10 mA OUT Output Leakage Current Shutdown or Driver Disable or V = 0V (Note 3,4), l 10 500 m A CC V = 20V OUT sn1385 1385fas 2 U WWW