Rainbow Electronics DS1862 - Manual (Page 13)

DS1862
XFP Laser Control and Digital Diagnostic IC
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Pin Description
NAME PIN DESCRIPTION
P-DOWN/RST A1
Power-Down/Reset Input. This multifunction pin is pulled high internally. See the Power-Down/Reset Pin
section for additional information.
SC-RX-LOS A2
Signal Conditioner Receiver Loss-of-Signal Input. This pin is an active-high input with LVCMOS/LVTTL
voltage levels.
SC-RX-LOL A3
Signal Conditioner Receiver Loss-of-Lock Input. This pin is an active-high input with LVCMOS/LVTTL
voltage levels.
THRSET A4
Threshold Set Output. This pin is a programmable voltage source that can be used for Rx signal
conditioner.
V CC2 A5 1.8V Power-Supply Input
RX-LOS B1 Receiver Loss-of-Signal. This open-drain output indicates when there is insufficient optical power.
SCL B2 I 2 C Serial-Clock Input
FETG B3 FET Gate Output. This pin can drive an external FET gate associated with safety fault disconnect.
RSSI B4 Received Power Signal Input
MODSET B5 Modulation Current Output. This pin is only capable of sinking current.
TX-D C1 Transmit Disable Input. This pin has an internal pullup resistor.
SDA C2 I 2 C Serial-Data Input/Output
EN1 C3 Enable 1 Output. Functional control for signal conditioners.
EN2 C4 Enable 2 Output. Functional control for signal conditioners.
BIASSET C5 Bias Current Output. This pin is only capable of sinking current.
INTERRUPT D1
Interrupt. This open-drain output pin indicates a possible operational fault or critical status condition to the
host.
MOD-NR D2 Indicating Module Operational Fault. Open-drain output. This pin indicates the status of the MOD-NR flag.
AUX1MON D3 Aux1 Monitor Input. This pin can be used to measure any voltage quantity.
AUX2MON D4 Aux2 Monitor Input. This pin can be used to measure any voltage quantity or external temperature sensor.
BMD D5 Monitor Diode Current Input. This pin is capable of sourcing or sinking current.
GND E1 Ground
MOD-DESEL E2
Module Deselect Input. This pin must be pulled low to enable I 2 C communication. This pin is pulled high
internally.
IBIASMON E3 Bias Monitor Input. This pin can be used to monitor the voltage across the laser.
SC-TX-LOS E4
Signal Conditioner Transmitter Loss-of-Signal. This pin is an active-high input with LVCMOS/LVTTL
voltage levels.
V CC3 E5 3.3V or 5V Power-Supply Input