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X9522_06 Datasheet, PDF (1/27 Pages) Intersil Corporation – Triple DCP, Dual Voltage Monitors
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X9522
Laser Diode Control for Fiber Optic Modules
January 3, 2006
FN8208.1
Triple DCP, Dual Voltage Monitors
FEATURES
• Three Digitally Controlled Potentiometers (DCPs)
—64 Tap - 10kΩ
—100 Tap - 10kΩ
—256 Tap - 100kΩ
— Nonvolatile
—Write Protect Function
• 2-Wire industry standard Serial Interface
• Dual Voltage Monitors
—Programmable Threshold Voltages
• Single Supply Operation
—2.7V to 5.5V
• Hot Pluggable
• 20 Pin package
— TSSOP
DESCRIPTION
The X9522 combines three Digitally Controlled Potenti-
ometers (DCPs), and two programmable voltage monitor
inputs with software and hardware indicators. All func-
tions of the X9522 are accessed by an industry standard
2-Wire serial interface.
Two of the DCPs of the X9522 may be utilized to control
the bias and modulation currents of the laser diode in a
Fiber Optic module. The third DCP may be used to set
other various reference quantities, or as a coarse trim for
one of the other two DCPs.The programmable voltage
monitors may be used for monitoring various module
alarm levels.
The features of the X9522 are ideally suited to simplifying
the design of fiber optic modules. The integration of
these functions into one package significantly reduces
board area, cost and increases reliability of laser diode
modules.
BLOCK DIAGRAM
WP
SDA
SCL
V3
V2
Vcc / V1
DATA
REGISTER
COMMAND
DECODE &
CONTROL
LOGIC
THRESHOLD
RESET LOGIC
8
PROTECT LOGIC
CONSTAT
REGISTER
2
-
VTRIP3
+
-
VTRIP 2
+
WIPER
COUNTER
REGISTER
6 - BIT
NONVOLATILE
MEMORY
WIPER
COUNTER
REGISTER
7 - BIT
NONVOLATILE
MEMOR Y
WIPER
COUNTER
REGISTER
8 - BIT
NONVOLATILE
MEMOR Y
RH0
RW0
RL0
RH1
RW1
RL1
RH2
RW2
RL2
V3RO
V2RO
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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©2000 Intersil Inc., Patents Pending. Copyright Intersil Americas Inc. 2006. All Rights Reserved
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