X9525 Datasheet, PDF (1/26 Pages) Intersil Corporation – Fiber Channel/Gigabit Etherner Laser Diode Control for Fiber Optic Modules

®
PRELIMINARY
X9525
Fiber Channel/Gigabit Ethernet Laser Diode Control for Fiber Optic Modules
Data Sheet
March 10, 2005
FN8210.0
Dual DCP, EEPROM Memory
FEATURES
• Two Digitally Controlled Potentiometers (DCP’s)
—100 Tap - 10kΩ
—256 Tap - 50kΩ
— Non-Volatile
—Write Protect Function
• 2kbit EEPROM Memory with Write Protect & Block
Lock^TM
• Device ID Addressability
• 2-Wire industry standard Serial Interface
—Complies to the Gigabit Interface Converter
(GBIC) specification
— Adressable
• Single Supply Operation
—2.7V to 5.5V
• Hot Pluggable
• Packages
—CSP (Chip Scale Package)
—20 Pin TSSOP
BLOCK DIAGRAM
DESCRIPTION
The X9525 combines two Digitally Controlled Potentiom-
eters (DCP’s), and integrated EEPROM with Block
Lock™ protection. All functions of the X9525 are
accessed by an industry standard 2-Wire serial interface.
The DCP’s of the X9525 may be utilized to control the
bias and modulation currents of the laser diode in a Fiber
Optic module. The 2kbit integrated EEPROM may be
used to store module definition data.
The features of the X9525 are ideally suited to simplifying
the design of fiber optic modules which comply to the Gi-
gabit Interface Converter (GBIC) specification. The inte-
gration of these functions into one package significantly
reduces board area, cost and increases reliability of laser
diode modules.
WP
SDA
SCL
Ao
DATA
REGISTER
COMMAND
DECODE &
CONTROL
LOGIC
THRESHOLD
RESET LOGIC
8
PROTECT
LOGIC
CONSTAT
REGISTER
4
2kbit
EEPROM
ARRAY
WIPER
COUNTER
REGISTER
8 - BIT
NONVOLATILE
MEMORY
WIPER
COUNTER
REGISTER
8 - BIT
NONVOLATILE
MEMORY
R_H1
R_W1
R_L1
R_H2
R_W2
R_L2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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