LT1330 5V RS232 Transceiver with 3V Logic Interface and One Receiver Active in Shutdown FEATURES DESCRIPTION n 3V Logic Interface The LT 1330 is a three driver, ve receiver RS232 trans- n ESD Protection over 10kV ceiver with low supply current. Designed to interface n Uses Small Capacitors: 0.1F, 0.2F, 1.0F with new 3V logic, the LT1330 operates with both a 5V n One Low Power Receiver Remains Active While in power supply and a 3V logic power supply. The chip may Shutdown be shut down to micropower operation with one receiver n Pin Compatible with LT1137A and LT1237 remaining active to monitor RS232 inputs such as ring n 120kBaud Operation for R = 3k, C = 2500pF detect from a modem. L L n 250kBaud Operation for R = 3k, C = 1000pF L L The LT1330 is fully compliant with all EIA RS232 spec- n CMOS Comparable Low Power: 30mW i cations. Additionally, the RS232 line input and output pins n Easy PC LayoutFlowthrough Architecture are resilient to multiple 10kV ESD strikes. This eliminates n Rugged Bipolar Design the need for costly TransZorbs on line pins for the RS232 n Outputs Assume a High Impedance State When Off part. or Powered Down n The LT1330 operates to 120kbaud even driving high Absolutely No Latchup n capacitive loads. During shutdown, driver and receiver 60A Supply Current in Shutdown n outputs are at a high impedance state allowing devices to Available in SO and SSOP Packages be paralleled. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. APPLICATIONS TransZorb is a registered trademark of General Instrments, GSI. n Notebook Computers n Palmtop Computers TYPICAL APPLICATION Output Waveforms + V V 1 28 LT1330 RECEIVER 1.0F 2 27 5V V 0.1F OUTPUT CC 2 s 0.1F 3 26 V = 3V L C = 50pF L 2 s 0.1F 4 25 DRIVER 1 IN 5 24 DRIVER DRIVER 1 OUT RX1 OUT OUTPUT 6 23 RX1 IN DRIVER 2 IN R = 3k L 7 22 C = 2500pF DRIVER 2 OUT L RX2 OUT TO LOGIC 8 21 RX2 IN RX3 OUT TO 9 20 LINE RX3 IN RX4 OUT 10 19 RX4 IN DRIVER 3 IN INPUT 11 18 RX5 OUT (LOW-Q) DRIVER 3 OUT RING DETECT IN 12 17 GND RX5 IN (LOW-Q) 1330 TA02 CONTROLLER OR DRIVER 13 16 ON/OFF PROCESSOR DISABLE 14 15 SHUTDOWN 3V V L CONTROL OUT 1330 TA01 1330fb 1LT1330 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Supply Voltage (V ) ..................................................6V CC + V 1 28 V Supply Voltage (V ) ....................................................6V L 5V V 2 27 C2 CC + V .......................................................................... 13.2V + + C1 3 26 C2 V ........................................................................ 13.2V C1 4 25 DR1 IN Input Voltage DR1 OUT 5 24 RX1 OUT + RX1 IN 6 23 DR2 IN Driver ............................................................V to V DR2 OUT 7 22 RX2 OUT Receiver .................................................30V to 30V RX2 IN 8 21 RX3 OUT Output Voltage RX3 IN 9 20 RX4 OUT Driver ...................................................... 30V to 30V 10 RX4 IN 19 DR3 IN RX5 OUT Receiver ....................................... 0.3V to V + 0.3V L DR3 OUT 11 18 (LOW-Q) RX5 IN Short-Circuit Duration 12 17 GND (LOW-Q) + DRIVER 13 16 ON/OFF V .....................................................................30 sec DISABLE 3V V 14 15 L NC V .....................................................................30 sec Driver Output .............................................. Inde nite G PACKAGE NW PACKAGE 28-LEAD PLASTIC SSOP 28-LEAD (WIDE) PDIP Receiver Output .......................................... Inde nite SW PACKAGE Operating Temperature Range 28-LEAD (WIDE) PLASTIC SO LT1330C ................................................... 0C to 70C T = 150C, = 96C/W (G) JMAX JA T = 150C, = 56C/W (NW) JMAX JA Storage Temperature Range ................... 65C to 150C T = 150C, = 85C/W (SW) JMAX JA Lead Temperature (Soldering, 10 sec) .................. 300C Consult factory for Military grade parts. ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT1330CG PBF LT1330CG TRPBF LT1330CG 28-Lead Plastic SSOP 0C to 70C LT1330CNW PBF LT1330CNW TRPBF LT1330CNW 28-Lead (Wide) PDIP 0C to 70C LT1330CSW PBF LT1330CSW PBF LT1330CSW 28-Lead (Wide) Plastic SO 0C to 70C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: