LTC1387CG#TRPBF

LTC1387 is a low power reconfigurable CMOS bidirectional transceiver. It can be configured as an RS485 differential port or as two RS232 single-ended ports. An on-board charge pump uses four 0.1µF capacitors to generate boosted positive and negative supplies, allowing the RS232 drivers to meet ±5V output swing requirements with only a single 5V supply. A shutdown mode reduces the ICC supply current to 5µA. The RS232 transceiver is in full compliance with RS232 specification. The RS485 transceiver is in full compliance with RS485 and RS422 specifications. All interface drivers feature short-circuit and thermal shutdown protection. An enable pin allows RS485 driver outputs to be forced into high impedance which is maintained even when the outputs are forced beyond supply rails or the power is off. Typical applications are point-of-sale terminals, software selectable multiprotocol interface ports, low power RS485/RS422/RS232/EIA562 interface, cable repeaters and level translators.

• Two RS232 transceivers or one RS485 transceiver
• Operates from a single 5V supply
• Guaranteed receiver output with inputs floating or shorted to ground
• Logic selectable fast/slow RS485 driver slew rate
• VCC supply current is 5µA typ at shutdown, ON=DXEN=RXEN=0V, TA=25°C, VCC=5V, C1=C2=C3=C4=0.1µF
• Self-testing capability in loopback mode
• Separate driver and receiver enable controls
• Driver maintains high impedance in three-state, shutdown or with power off
• Receiver inputs can withstand ±25V
• 20-lead plastic SSOP package

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