LTC1321/LTC1322/LTC1335 RS232/EIA562/RS485 Transceivers DESCRIPTIO EA U F T RES n LTC1321: 2-EIA562/RS232 Transceivers/2-RS485 The LTC1321/LTC1322/LTC1335 are low power CMOS Transceivers bidirectional transceivers, each featuring two reconfigurable n interface ports. Each can be configured as two RS485 LTC1322: 4-EIA562/RS232 Transceivers/2-RS485 Transceivers differential ports, as two single-ended ports, or as one n LTC1335: 4-EIA562 Transceivers/2-RS485 RS485 differential port and one single-ended port. The LTC1321/LTC1322 can provide RS232 or EIA562 compat- Transceivers with OE n LTC1321/LTC1322 Have the Same Pinout as ible single-ended outputs the LTC1335 provides EIA562 SP301/SP302 compatible outputs and additionally includes an output n enable pin, allowing the receiver logic level outputs to be LTC1335 Features Receiver Three-State Outputs n Low Supply Current: 1mA Typical three-stated. n 15A Supply Current in Shutdown The RS232/EIA562 transceivers operate to 120kbaud and n 120kBaud in EIA/TIA-562 or RS232 Mode are in full compliance with EIA/TIA-562 specification. The n 10MBaud in RS485/RS422 Mode RS485 transceivers operate to 10Mbaud and are in full n Self-Testing Capability in Loopback Mode compliance with RS485 and RS422 specifications. All n Power-Up/Down Glitch-Free Outputs interface drivers feature short-circuit and thermal shut- n Driver Maintains High Impedance in Three-State, down protection. An enable pin allows RS485 driver Shutdown or With Power Off outputs to be forced into high impedance which is main- n Thermal Shutdown Protection tained even when the outputs are forced beyond supply n I/O Lines Can Withstand 25V rails or power is off. Both driver outputs and receiver n Withstands Repeated 10kV ESD Pulses inputs feature 10kV ESD protection. A loopback mode U connects the driver outputs back to the receiver inputs for APPLICATIONS diagnostic self-test. n Low Power RS485/RS422/EIA562/RS232 Interface The LTC1321/LTC1322 can support RS232 voltage levels n Cable Repeater when 6.5V V 10V and 6.5V V 10V. The DD EE n Level Translator LTC1335 supports receiver output enable but not RS232 levels. A shutdown mode reduces the I supply current CC to 15A. TYPICAL APPLICATI 24 V 24 V CC1 CC2 5V 5V 1 1 11 2 15 22 RS485 INTERFACE 3 10 RX OUT RX OUT 21 16 120 DR ENABLE 120 DR ENABLE 9 4 20 17 DR IN 8 DR IN 5 4000-FT 24-GAUGE TWISTED PAIR 7 19 19 6 5V 5V 5V 5V LTC1322 LTC1322 6 18 18 7 0V 0V 5V 5V EIA562 INTERFACE 17 8 3 22 DR IN RX OUT 2 23 16 9 DR IN RX OUT 15 10 5 20 RX OUT DR IN 14 11 4 21 RX OUT DR IN 13 12 12 13 V V EE2 EE1 5V 5V 1321/22/35 TA01 1 UO ULTC1321/LTC1322/LTC1335 O ABS LUTEXAI U RATI GS Supply Voltage Output Voltage V .................................................................... 6.5V Drivers ................................................. 25V to 25V CC V (LTC1321/LTC1322 Only) ........................... 10V Receivers ............................... 0.3V to (V + 0.3V) DD CC V ................................................................... 10V Output Short-Circuit Duration ......................... Indefinite EE Input Voltage Operating Temperature Range Drivers ................................... 0.3V to (V + 0.3V) LTC1321C/LTC1322C/LTC1335C ......... 0C to 70C CC Receivers ............................................. 25V to 25V LTC1321I/LTC1322I/LTC1335I ......... 40C to 85C ON/OFF, LB, SEL1, Storage Temperature Range ................ 65C to 150C SEL2, OE ............................ 0.3V to (V + 0.3V) Lead Temperature (Soldering, 10 sec)................ 300C CC PACKAGE/ORDER I FOR ATIO 2 RS485 DRIVERS/RECEIVERS 2 RS485 DRIVERS/RECEIVERS 2 RS485 DRIVERS/RECEIVERS 2 EIA/TIA-562 DRIVERS/RECEIVERS 4 EIA/TIA-562 DRIVERS/RECEIVERS 4 EIA/TIA-562 DRIVERS/RECEIVERS TOP VIEW TOP VIEW TOP VIEW OE 1 24 V V 1 24 V V 1 24 V DD CC CC DD CC B1 2 23 R B1 2 23 NC B1 2 23 R B1 B1 A1 3 22 R A1 3 22 R A1 3 22 R A1 A1 A1 Z1 4 21 D /DE1 Z1 4 21 DE1 Z1 4 21 D /DE1 Z1 Z1 Y1 5 20 D Y1 5 20 D Y1 5 20 D Y1 Y1 Y1 SEL1 6 19 LB SEL1 6 19 LB SEL1 6 19 LB SEL2 7 18 ON/OFF SEL2 7 18 ON/OFF SEL2 7 18 ON/OFF Y2 8 17 D Y2 8 17 D Y2 8 17 D Y2 Y2 Y2 Z2 9 16 D /DE2 Z2 9 16 DE2 Z2 9 16 D /DE2 Z2 Z2 A2 10 15 R A2 10 15 R A2 10 15 R A2 A2 A2 B2 11 14 R B2 11 14 NC B2 11 14 R B2 B2 GND 12 13 V GND 12 13 V GND 12 13 V EE EE EE N PACKAGE N PACKAGE S PACKAGE S PACKAGE N PACKAGE S PACKAGE 24-LEAD PLASTIC DIP 24-LEAD PLASTIC DIP 24-LEAD PLASTIC SOL 24-LEAD PLASTIC SOL 24-LEAD PLASTIC DIP 24-LEAD PLASTIC SOL T = 125C, = 75C/W (N) T = 125C, = 75C/W (N) T = 125C, = 75C/W (N) JMAX JA JMAX JA JMAX JA T = 125C, = 85C/W (S) T = 125C, = 85C/W (S) T = 125C, = 85C/W (S) JMAX JA JMAX JA JMAX JA ORDER PART ORDER PART ORDER PART NUMBER NUMBER NUMBER LTC1322CN LTC1321CN LTC1335CN LTC1322CS LTC1321CS LTC1335CS LTC1322IN LTC1321IN LTC1335IN LTC1322IS LTC1321IS LTC1335IS Consult factory for Military grade parts. 2 U WU U W W W