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Intersil Electronic Components Datasheet

X9522 Datasheet

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
www.DataSheet4U.com
WP
SDA
SCL
DATA
REGISTER
COMMAND
DECODE &
CONTROL
LOGIC
THRESHOLD
RESET LOGIC
V3
V2
Vcc / V1
8
PROTECT LOGIC
CONSTAT
REGISTER
VTRIP3
VTRIP 2
-
+
-
+
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.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
©2000 Intersil Inc., Patents Pending. Copyright Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.


Intersil Electronic Components Datasheet

X9522 Datasheet

Dual Voltage Monitors

No Preview Available !

X9522
Ordering Information
PART NUMBER
PART MARKING
PRESET (FACTORY SHIPPED) VTRIPx
THRESHOLD LEVELS (x = 2, 3)
TEMP RANGE (°C)
PACKAGE
X9522V20I-A
X9522VIA
Optimized for 3.3V system monitoring
-40 to +85
20 Ld TSSOP
X9522V20I-B
X9522VIB
Optimized for 5V system monitoring
-40 to +85
20 Ld TSSOP
X9522V20IZ-A (Note) X9522VZIA
Optimized for 3.3V system monitoring
-40 to +85
20 Ld TSSOP (Pb-free)
X9522V20IZ-B (Note) X9522VZIB
Optimized for 5V system monitoring
-40 to +85
20 Ld TSSOP (Pb-free)
*Add "T1" suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
PIN CONFIGURATION
RH2
RW2
RL2
V3
V3RO
NC
WP
SCL
SDA
VSS
20 Pin TSSOP
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
Vcc / V1
NC
V2RO
V2
RL0
RW0
RH0
RH1
RW1
RL1
NOT TO SCALE
DETAILED DEVICE DESCRIPTION
The X9522 combines three Intersil Digitally Controlled
Potentiometer (DCP) devices, and two voltage monitors,
in one package. These functions are suited to the control,
support, and monitoring of various system parameters in
fiber optic modules. The combination of the X9522 func-
tionality lowers system cost, increases reliability, and
reduces board space requirements.
Two high resolution DCPs allow for the “set-and-forget”
adjustment of Laser Driver IC parameters such as Laser
Diode Bias and Modulation Currents. One lower resolu-
tion DCP may be used for setting sundry system param-
eters such as maximum laser output power (for eye
safety requirements).
The dual Voltage Monitor circuits continuously compare
their inputs to individual trip voltages. If an input voltage
exceeds it’s associated trip level, a hardware output
(V3RO, V2RO) are allowed to go HIGH. If the input volt-
age becomes lower than it’s associated trip level, the cor-
responding output is driven LOW. A corresponding
binary representation of the two monitor circuit outputs
(V2RO and V3RO) are also stored in latched, volatile
(CONSTAT) register bits. The status of these two moni-
tor outputs can be read out via the 2-wire serial port.
Intersil’s unique circuits allow for all internal trip volt-
ages to be individually programmed with high accu-
racy. This gives the designer great flexibility in
changing system parameters, either at the time of
manufacture, or in the field.
The device features a 2-Wire interface and software pro-
tocol allowing operation on an I2C™ compatible serial
bus.
2 FN8208.1
January 3, 2006


Part Number X9522
Description Dual Voltage Monitors
Maker Intersil Corporation
Total Page 27 Pages
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