050_340 Datasheet, PDF (5/14 Pages) Glenair, Inc. – PRINTED CIRCUIT BOARD (PCB) MOUNT

050-340 Product Brief
PCB Mount Bi-Directional 1310/1550 Single Fiber
Transceiver, 125 Mbps – 1.25 Gbps, SMF, 3.3V
FUNCTIONAL DESCRIPTION
Figure 2
PCB mount Transceiver Block Diagram
TRANSMITTER SECTION
Transmit Disable (Tx_Disable)
The transmitter section of the transceiver accepts a TTL and CMOS compatible transmit disable control signal input that
shuts down the transmitter optical output. A high signal disables the transmitter while a low signal allows normal
transceiver operation. Also laser is disabled when TX Disable is open. In the event of a fault (e.g. eye safety circuit
activated), cycling this control signal resets the module. Host systems should allow a 10ms interval between successive
assertions of this control signal.
Transmit Fault (Tx_Fault)
A catastrophic laser fault will activate the transmitter signal, TX_FAULT, and disable the laser. This signal is an open
collector output (pull-up required on the host board). A low signal indicates normal laser operation and a high signal
indicates a fault. The TX_FAULT will be latched high when a laser fault occurs and is cleared by toggling the
TX_DISABLE input or cycling the power of the transceiver. The transmitter fault condition can also be monitored via the 2-
wire serial interface (address A2, byte 110, bit 2).
©2015 Glenair, Inc.
GLENAIR, INC.
www.glenair.com
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