• Product Introduction

LTC1334ISW

Single 5V RS232/RS485 multiprotocol transceiver

peculiarity

• 4 RS232 transceivers or two RS485 transceivers on one chip
• Available from a single 5V supply
• Withstands multiple ESD pulses ± 10kV
• Use small charge pump capacitance: 0.1μF
• Low supply current: 8 mA typical
• Supply at 10μA at shutdown current
• 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 receiver input can withstand ± 25V

description

The LTC ® 1334 is a low-power CMOS bidirectional transceiver with two reconfigurable interface ports. It can be configured as two RS485 differential ports, two dual RS232 single-ended ports or one RS485 differential port and one dual RS232 single-ended port. The on-board charge pump requires four 0.1μF capacitors to generate push positive and negative supplies, allowing the RS232 driver to meet the RS232's ± 5V output swing with only a single 5V supply requirement. Shutdown mode, reduced my CC supply current to 10μA. The RS232 transceiver is fully compliant with the RS232 specification. RS485 transceivers RS485 and RS422 specifications are fully compliant. All interface drivers have short-circuit protection and thermal shutdown protection. The RS485 driver output is forced into high impedance, which is allowed by the output enable pin to hold or even be forced to go beyond the power rail or when the power is turned off. Two driver outputs and receiver inputs ± 10kV ESD protection. Loopback mode allows the driver output to be connected to the receiver input for diagnostic self-test.