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Photo-Detector
Amplification
&
Quantization
Laser
Laser Driver &
Safety Circuit
Electrical Interface
RD+ (Receive Data)
RD- (Receive Data)
Rx Loss Of Signal
MOD-DEF2 (SDA)
TX_DISABLE
TD+ (Transmit Data)
TD- (Transmit Data)
TX_FAULT
MOD-DEF0
MOD-DEF1 (SCL)
Receiver
Transmitter
Optical Interface
Light from Fiber
Light to Fiber
Controller & Memory
Figure 1. Transceiver Functional Diagram
Overview
The AFCT-571xZ family is compliant with both IEEE
802.3Z (1000BASE-LX) and the SFP Multi-Source
Agreement (MSA) speci cation. These transceivers
are intended for premise, public and access network-
ing applications. They are quali ed in accordance with
GR-468-CORE, and transmit data over single-mode
(SM) ber for a link distance of 10 km, in excess of the
standard.
The AFCT-5715Z family of optical transceivers adds
digital diagnostic monitoring to standard SFP function-
ality, enabling fault isolation, components monitoring
and failure prediction capabilities.
General Features
The AFCT-571xZ is compliant to 1 GbE speci cations.
This includes speci cations for the signal coding, optical
ber and connector types, optical and electrical trans-
mitter characteristics, optical and electrical receiver
characteristics, jitter characteristics, and compliance
testing methodology for the aforementioned.
This transceiver is capable of implementing both Single
Mode (SM) and Multimode (MM) optical ber applica-
tions in that order of precedence in the event of con-
icting speci cations. In addition, the SM link type
exceeds the 2 m to 5 km 1000BASE-LX speci cation by
achieving compliance over 2 m to 10 km. The MM link
type is expected to meet the 62.5 μm MMF speci cation
when used with an “o set launch” ber.
SFP MSA Compliance
The product package is compliant with the SFP MSA with
the LC connector option. The SFP MSA includes speci ca-
tions for mechanical packaging and performance as well
as dc, ac and control signal timing and performance.
The power supply is 3.3 V dc.
The High Speed I/O (HSIO) signal interface is a Low
Voltage Di erential type. It is ac coupled and terminated
internally to the module. The internal termination is a
100 Ohm di erential load.
Installation
The AFCT-571xZ can be installed in or removed from
any MSA-compliant Pluggable Small Form Factor (SFP)
port regardless of whether the host equipment is
operating or not. The module is simply inserted, electri-
cal-interface rst, under nger-pressure. Controlled hot-
plugging is ensured by 3-stage pin sequencing at the
electrical interface. This printed circuit board card-edge
connector is depicted in Figure 2.
As the module is inserted, rst contact is made by
the housing ground shield, discharging any poten-
tially component-damaging static electricity. Ground
pins engage next and are followed by Tx and Rx
power supplies. Finally, signal lines are connected. Pin
functions and sequencing are listed in Table 2.