©2014 Glenair, Inc.

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GLENAIR, INC.

∙ 1211 AIR WAY ∙ GLENDALE, CA 91201-2497

∙ TEL: 818-247-6000

∙ FAX: 818-500-9912

www.glenair.com

PAGE 8 of 16

E-mail: sales@glenair.com

050-331 Product Brief

PC Board Mount Dual-Transmitter

3G-SDI and HD-SDI, MMF, 3.3V

The Transmitters provides Class 1 eye safety by design and is compliant with US FDA CDRH AEL Class 1 and EN(IEC)

60825-1,2, EN60950 Class 1. The eye safety circuit continuously monitors optical output power levels and will disable the

transmitter and assert a TX_FAULT signal upon detecting an unsafe condition. Such unsafe conditions can be created by

inputs from the host board (Vcc fluctuation, unbalanced code) or faults within the module.

FUNCTIONAL I/O

The PC board mount dual-transmitter accepts industry standard differential signals such as LVPECL and CML within the

scope of the SFP MSA. To simplify board requirements, transmitter bias resistors and ac coupling capacitors are

incorporated, per SFF-8074i, and hence are not required on the host board. The module is AC-coupled and internally

terminated.

Figure 3 illustrates a recommended interface circuit to link the PC board mount dual-transmitter to the supporting Physical

Layer integrated circuits.

The PC board mount dual-transmitter interfaces with the host circuit board through twenty I/O pins identified by function in

Table 7. The dual-transmitter high speed transmit and receive interfaces require SFP MSA compliant signal lines on the

host board. The TX1_DISABLE, TX2_DISABLE, TX1_FAULT and TX2_FAULT require TTL lines on the host board (per

SFF-8074i) if used. If an application chooses not to take advantage of the functionality of these pins TX1_Disable and

TX2_Disable need to be tied to GND, TX1_Fault , TX2_Fault do not need to be connected.

.