
11
Table 2. Pin Out Table (continued)
Pin
Symbol
4
Clk+
Received Recovered Clock Out
See pins 1 and 2 for optional, local generated clock output.
Functional Description
The falling edge occurs coincident with the edges of the Received Data output.
The rising edge occurs in the middle of the Received Data baud period.
Terminate this high-speed, differential clock output with standard PECL techniques at
the clock input point of the follow-on device.
Laser Bias Monitor (-)
This analog current is monitored by measuring the voltage drop across a 10 ohm
resistor placed between high impedance resistors connected to pins 5 and 6 internal to
the transceiver.
Laser Bias Monitor (+)
This analog current is monitored by measuring the voltage drop across a 10 ohm
resistor placed between high impedance resistors connected to pins 5 and 6 internal to
the transceiver.
Transmitter Disable
Transmitter Output Disabled: V
CCT
– 1.5 V
≤
V
7
≤
V
CCT
.
Transmitter Output Uncertain: V
CCT
– 4.2 V
≤
V
7
≤
V
CCT
– 1.5 V.
Transmitter Output Enabled: V
EET
≤
V
7
≤
V
CCT
– 4.2 V or open circuit.
5
L
MON
(–)
6
L
MON
(+)
7
Txdis
8
9
N/C
P
MON
Power Monitor
The analog voltage measured at this high impedance output provides an indication of
whether the optical power output of the Laser Diode is operating within the normal
specified power output range per the following relationships:
High Light Indication: V
9
≤
V
EET
+ 1.7 V.
Normal Operation: V
9
V
EET
+ 1.2 V.
Low Light Indication: V
9
≤
V
EET
+ 0.7 V.
Transmitter Signal Ground
Directly connect this pin to the transmitter signal ground plane.
Transmitter Data In
Terminate this high-speed, differential Transmitter Data input with standard PECL
techniques at the transmitter input pin.
Transmitter Data In Bar
Terminate this high-speed, differential Transmitter Data input with standard PECL
techniques at the transmitter input pin.
Transmitter Power Supply
Provide +5 V dc via the recommended transmitter power supply filter circuit. Locate
the power supply filter circuit as close as possible to the V
CCT
pin.
Receiver Power Supply
Provide +5 V dc via the recommended receiver power supply filter circuit. Locate the
power supply filter circuit as close as possible to the V
CCR
pin.
10
V
EET
11
TD+
12
TD–
13
V
CCT
14
V
CCR