The BTR-7840G series is high performance module for single fiber communications by using 1310 nm transmitter and 1490 nm receiver. This module is equipped with 3W-TRXTM OE device to reject 1.55 um high power video signal. The transmitter section uses a multiple quantum well 1310 nm DFB laser and is a class 1 laser compliant according to International Safety Standard IEC-60825. The receiver section is designed to receive 1490 nm and block 1550 nm signal. This feature is suitable for IEEE 802.3ah and ITU-T 983.3 application. The receiver section uses an integrated 1490 nm detector preamplifier (IDP) mounted in an optical header and a limiting post-amplifier IC. A PECL logic interface simplifies interface to external circuitry.