• Product Introduction

LTC1321ISW 

RS232/EIA562/RS485 transceiver

peculiarity

• LTC1321: 2-EIA562/RS232 Transceivers/2-RS485 Transceivers
• LTC1322: 4-EIA562/RS232 Transceivers/2-RS485 Transceivers
• LTC1335: OE 4 EIA562 Transceivers/2-RS485 Transceiver
• LTC1321/LTC1322 have the same pin SP301/SP302
• LTC1335 function receiver three-state output
• Low supply current: 1mA typical
• Supply at 15μA at shutdown current
• 120kBaud in EIA/TIA-562 or RS232 way
• 10MBaud in RS485/RS422 mode
• Self-test ability in loopback mode
• Interference-free output with Power-Up/Down
• Drive maintenance state, power off or power off, high impedance
• Thermal shutdown protection
• The I/O wires can withstand ± 25V
• Withstands multiple 10kV ESD pulses

description

LTC1321/LTC1322/LTC1335 low-power CMOS bidirectional transceivers, each with two reconfigurable interface ports. Each can be configured with two single-ended ports, two RS485 differential ports, or one RS485 differential port and one single-ended port. The LTC1321/LTC1322 is available with RS232 or EIA562 compatible single-ended outputs, LTC1335 EIA562 compatible outputs are included, in addition to including an output enable pin that allows receiving logic level output in three states.

The RS232/EIA562 transceiver operates at 120kbaud and is fully compliant with EIA/TIA-562 specifications. RS485 transceivers operate 10Mbaud and are fully compliant with RS485 and RS422 specifications. All interface drivers have short-circuit protection and thermal shutdown protection. An enable pin allows the RS485 driver output to be forced into a high impedance, which is maintained even when the output is forced beyond the power rail or power off. Two driver outputs and receiver inputs ± 10kV ESD protection. A loopback-mode connected drive outputs a receiver input for diagnostic self-test.

LTC1321/LTC1322可以支持RS232电压等级6.5V 时= V _DD = 10V和6.5VV _EE> / = - 10V。 LTC1335 supports receiver output enable, but not RS232 level. A shutdown mode can carry IM CC with a supply current of 15μA.