SHUTDOWN CURRENT (A) LTC1338 5V Low Power RS232 5-Driver/3-Receiver Transceiver DESCRIPTIO FEATURES n Low Supply Current: 500A The LTC1338 is a 5-driver/3-receiver RS232 trans- n 0.2A Supply Current in SHUTDOWN ceiver with very low supply current. In the no load n 50A Supply Current in RECEIVER ALIVE Mode condition, the supply current is only 500A. The charge n ESD Protection Over 10kV pump only requires four 0.1F capacitors. n Operates from a Single 5V Supply In SHUTDOWN mode, the supply current is further n Uses Small Capacitors: 0.1F reduced to 0.2A. In RECEIVER ALIVE mode, all three n Operates to 120k Baud receivers are kept alive and the supply current is 50A. n Three-State Outputs Are High Impedance When Off All RS232 outputs assume a high impedance state in n Output Overvoltage Does Not Force Current SHUTDOWN and with the power off. Back into Supplies n The LTC1338 is fully compliant with all data rate and RS232 I/O Lines Can Be Forced to 25V overvoltage RS232 specifications. The transceiver can Without Damage n operate up to 120k baud with a 2500pF, 3k load. Both Flowthrough Architecture driver outputs and receiver inputs can be forced to APPLICATI S 25V without damage, and can survive multiple 10kV ESD strikes. n Battery-Powered Modems n Battery-Powered DCE n Notebook Computers n Palmtop Computers TYPICAL APPLICATI 5-Drivers/3-Receivers with SHUTDOWN Supply Current 1.2 1200 + 1 28 V V LTC1338 C1 C4 2 27 V 1.0 0.1F 1000 CC 0.1F C3 3 26 0.1F C2 4 25 0.8 0.1F 800 DRIVER 1 IN 5 24 DRIVER 1 OUT DRIVER 2 IN QUIESCENT 6 23 0.6 600 DRIVER 2 OUT RX1 OUT CURRENT 7 22 RX1 IN DRIVER 3 IN 0.4 400 8 21 DRIVER 3 OUT RX2 OUT SHUTDOWN 9 20 CURRENT RX2 IN DRIVER 4 IN 0.2 200 10 19 DRIVER 4 OUT RX3 OUT 11 18 RX3 IN DRIVER 5 IN 0 0 12 17 40 20 0 20 40 60 80 100 DRIVER 5 OUT GND TEMPERATURE (C) 13 16 RX ENABLE DRIVER ENABLE TEST CONDITION: 14 15 LTC1338 TA02 NC NC V = 5V, ALL DRIVER INPUTS TIED TO V . CC CC LTC1338 TA01 1 QUIESCENT CURRENT (A) UO UO ULTC1338 ABSOLUTEXAI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) TOP VIEW Supply Voltage (V ) ................................................ 6V CC ORDER PART + V 1 28 V Input Voltage NUMBER + V 2 27 C2 CC Driver ....................................... 0.3V to V + 0.3V CC + C1 3 26 C2 Receiver ............................................... 25V to 25V C1 4 25 DR1 IN LTC1338CG Driver/Receiver Enable Pin ........ 0.3V to V + 0.3V CC DR1 OUT 5 24 DR2 IN LTC1338CN Output Voltage DR2 OUT 6 23 RX1 OUT LTC1338CS Driver .................................................... 25V to 25V RX1 IN 7 22 DR3 IN LTC1338IG DR3 OUT 8 21 RX2 OUT Receiver .................................... 0.3V to V + 0.3V CC LTC1338IN RX2 IN 9 20 DR4 IN Short Circuit Duration LTC1338IS DR4 OUT 10 19 RX3 OUT + V ................................................................... 30 sec RX3 IN 11 18 DR5 IN V ................................................................... 30 sec DR5 OUT 12 17 GND Driver Output .............................................. Indefinite RX ENABLE 13 16 DR ENABLE NC Receiver Output .......................................... Indefinite 14 15 NC Operating Temperature Range G PACKAGE N PACKAGE 28-LEAD SSOP 28-LEAD PLASTIC DIP Commercial (LTC1338C) ........................ 0C to 70C S PACKAGE Industrial (LTC1338I) ........................ 40C to 85C 28-LEAD PLASTIC SOL T = 125C, = 96C/W (G) JMAX JA Storage Temperature Range ................ 65C to 150C T = 125C, = 56C/W (N) JMAX JA Lead Temperature (Soldering, 10 sec)................. 300C T = 125C, = 85C/W (S) JMAX JA DC ELECTRICAL CHARACTERISTICS V = 5V, C1 = C2 = C3 = C4 = 0.1F, unless otherwise noted. CC PARAMETER CONDITIONS MIN TYP MAX UNITS Any Driver Output Voltage Swing 3k to GND Positive l 5.0 7.0 V Negative l 5.0 6.5 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 0 V V l 5 A IN CC Output Short-Circuit Current V = 0V 12 mA OUT Output Leakage Current SHUTDOWN, V = 20V (Note 3) l 10 500 A OUT Any Receiver Input Voltage Thresholds Input Low Threshold l 0.8 1.3 V Input High Threshold l 1.7 2.4 V Hysteresis l 0.1 0.4 1 V Input Resistance 10V V 10V 3 5 7 k IN Output Voltage Output Low, I = 1.6mA (V = 5V) l 0.2 0.4 V OUT CC Output High, I = 160A (V = 5V) l 3.5 4.8 V OUT CC Output Short-Circuit Current Sinking Current, V = V 15 40 mA OUT CC Output Leakage Current SHUTDOWN, 0 V V (Note 3) l 110 A OUT CC Power Supply Generator + V Output Voltage I = 0mA 8.0 V OUT I = 12mA 7.5 V OUT V Output Voltage I = 0mA 8.0 V OUT I = 12mA 7.0 V OUT Supply Rise Time SHUTDOWN to Turn-On 0.2 ms 2 U W W W U WU