Overview
SFP MSA Compliance
The AFCT-571xZ family is compliant with both IEEE The product package is compliant with the SFP MSA with
802.3Z (1000BASE-LX) and the SFP Multi-Source the LC connector option. The SFP MSA includes specifica-
Agreement (MSA) specification. These transceivers tions for mechanical packaging and performance as well
are intended for premise, public and access network- as dc, ac and control signal timing and performance.
ing applications. They are qualified in accordance with
GR-468-CORE, and transmit data over single-mode
The power supply is 3.3 V dc.
(SM) fiber for a link distance of 10 km, in excess of the The High Speed I/O (HSIO) signal interface is a Low
standard.
Voltage Differential type. It is ac coupled and terminated
internally to the module. The internal termination is a
100 Ohm differential load.
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.
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 first, under finger-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.
General Features
The AFCT-571xZ is compliant to 1 GbE specifications.
This includes specifications for the signal coding, optical
fiber and connector types, optical and electrical trans-
mitter characteristics, optical and electrical receiver
characteristics, jitter characteristics, and compliance
testing methodology for the aforementioned.
As the module is inserted, first 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.
This transceiver is capable of implementing both Single
Mode (SM) and Multimode (MM) optical fiber applica-
tions in that order of precedence in the event of con-
flicting specifications. In addition, the SM link type
exceeds the 2 m to 5 km 1000BASE-LX specification by
achieving compliance over 2 m to 10 km. The MM link
type is expected to meet the 62.5 μm MMF specification
when used with an “offset launch”fiber.
Receiver
Electrical Interface
Optical Interface
RD+ (Receive Data)
Amplification
&
Photo-Detector
Light from Fiber
Quantization
RD- (Receive Data)
Rx Loss Of Signal
MOD-DEF2 (SDA)
MOD-DEF1 (SCL)
MOD-DEF0
text
Controller & Memory
Transmitter
TX_DISABLE
TD+ (Transmit Data)
Laser Driver &
Safety Circuit
Light to Fiber
Laser
TD- (Transmit Data)
TX_FAULT
Figure 1. Transceiver Functional Diagram
2