Data Sheet
August 2001
NetLight
1417K5A 2.5 Gbits/s
1300 nm Laser Transceiver with Clock and Data Recovery
Pin Information
Table 1. Transceiver Pin Descriptions
Pin
Number
MS
Symbol
Name/Description
Receiver
Mounting Studs.
The mounting studs are provided for transceiver
mechanical attachment to the circuit board. They may also provide an
optional connection of the transceiver to the equipment chassis
ground.
Photodetector Bias Input.
This lead supplies bias for the PIN photo-
detector diode
Receiver Signal Ground.
Receiver Signal Ground.
Received Recovered
Clock
Out.
The rising edge occurs at the rising
edge of the Received Data output. The falling edge occurs in the mid-
dle of the Received Data baud period.
Received Recover Clock Out.
The falling edge occurs at the rising
edge of the Received Data output. The rising edge occurs in the mid-
dle of the Received Data baud period.
Receiver Signal Ground.
Receiver Power Supply.
Signal Detect.
Normal operation: logic 1 output.
Fault condition: logic 0 output
Received
DATA
Out.
Received DATA Out.
Transmitter
Transmitter Power Supply.
Transmitter Signal Ground.
Transmitter Disable.
Transmitter DATA In.
An internal 50
Ω
termination is provided, con-
sisting of a 100
Ω
resistor between the TD+ and TD– pins.
Transmitter
DATA
In.
See TD+ pin for terminations.
No Internal Connection.
Laser Diode Bias Current Monitor, Negative End.
The laser bias
current is accessible as a dc voltage by measuring the voltage devel-
oped across pins 17 and 18.
Laser Diode Bias Current Monitor, Positive End.
Optional feature;
if not used, do not connect. See pin 17 description.
Laser Diode Optical Power Monitor, Negative End.
Optional fea-
ture; if not used, do not connect. The back-facet diode monitor cur-
rent is accessible as a voltage proportional to the photocurrent
through a 200
Ω
resistor between pins 19 and 20.
Laser Diode Optical Power Monitor, Positive End.
Optional fea-
ture; if not used, do not connect. See pin 19 description.
Logic Family
MS
NA
1
2
3
4
V
PD
V
EER
V
EER
CLK–
NA
NA
NA
CML
5
CLK+
CML
6
7
8
V
EER
V
CCR
SD
NA
NA
LVTTL
9
10
11
12
13
14
15
16
17
RD–
RD+
V
CCT
V
EET
T
DIS
TD+
TD–
NIC
B
MON
–
CML
CML
NA
NA
LVTTL
LVPECL/CML
LVPECL/CML
NA
NA
18
19
B
MON
+
P
MON
–
NA
NA
20
P
MON
+
NA
Agere Systems Inc.
3
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