Table 2. Pin Out Table
Pin Symbol
Mounting Studs
Functional Description
The mounting studs are provided for transceiver mechanical attachment to the circuit board.
They are embedded in the non-conductive plastic housing and are not connected to the
transceiver internal circuit. They should be soldered into plated-through holes on the printed
circuit board.
1
2
VEER
Receiver Signal Ground
Directly connect this pin to receiver signal ground plane.
RD+
Receiver Data Out
Terminate this high-speed, differential, LVPECL output with standard LVPECL techniques at the
follow-on device input pin.
3
4
RD-
SD
Receiver Data Out Bar
Terminate this high-speed, differential, LVPECL output with standard LVPECL techniques at the
follow-on device input pin.
Signal Detect
Normal input optical levels to the receiver result in a logic "1" output.
Low input optical levels to the receiver result in a fault indication shown by a logic "0" output.
Signal Detect is a single-ended, LVPECL output. This output will operate with 270 W termination
resistor to VEE to achieve LVPECL output levels.
This Signal Detect output can be used to drive a LVPECL input on an upstream circuit, such as,
Signal Detect input and Loss of Signal-bar input.
5
6
7
8
9
VCCR
VCCT
TD-
TD+
VEET
Receiver Power Supply
Provide +3.3 V dc via the recommended receiver power supply filter circuit.
Locate the power supply filter circuit as close as possible to the VCCR pin.
Transmitter Power Supply
Provide +3.3 V dc via the recommended transmitter power supply filter circuit.
Locate the power supply filter circuit as close as possible to the VCCT pin.
Transmitter Data In Bar
Terminate this high-speed, differential Transmitter Data input with standard LVPECL techniques at
the transmitter input pin.
Transmitter Data In
Terminate this high-speed, differential Transmitter Data input with standard LVPECL techniques at
the transmitter input pin.
Transmitter Signal Ground
Directly connect this pin to the transmitter signal ground plane.
Temperature Range 0°C to +70°C
HFCT-5805B
HFCT-5805D
Black Case
Blue Case
Temperature Range -40°C to +85°C
HFCT-5805A
HFCT-5805C
Black Case
Blue Case
9
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