The LB5377 is a fully integrated transceiver compliant with AISG.Its receiver provides a 20dB typical dynamic range and integrates a bandpass filter operating in the 2.176MHz frequency with a narrow 200kHz bandwidth.Its transmitter integrates a bandpass filter compliant with the AISG spectrum emission profile.The transmitter can modulate OOK signals up to 115.2kbps.With external resistors,the output power can vary from+7dBm to+12dBm to compensate for loss in the external circuitry and cabling.A direction output is also available to help with the RS-485 bus arbitration in tower-mounted equipment.Regarding the package,the LB5377 adopts a small,3mm×3mm 16-pin QFN and is rated.

1.FEATURES

-Wide input dynamic for receiver,ranging from

–15dBm to+5dBm in 50Ω

-Transmitter output level variable from

+7dBm to+12dBm

-Output emission profile compliant with AISG

-Output with AutoDirection

-Handle bus arbitration in tower-mounted

equipment without microcontrollers

-All AISG data rates supported:

9.6kbps

38.4kbps

115.2kbps

-AISG-compliant bandpass filter centered

around 2.176MHz

-Voltage supply from 3.0V to 5.5V

-Independent logic supply

-3mm×3mm QFN-16 package

2.APPLICATIONS

-Base Stations

-Tower Equipment