SY88702KI

SY88702KI Datasheet

SY88702

Part	Datasheet
SY88702KI	SY88702KI (pdf)

Related Parts	Information
SY88702KI TR	SY88702KI TR

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Micrel 5V 622Mbps LASER DIODE DRIVER WITH OUTPUT ENABLE SY88702 SY88702 s Up to 622Mbps operation s Modulation current to 25mA s PECL output enable s Differential PECL inputs s Single 5V power supply s Available in a tiny 10-pin 3mm MSOP s 622Mbps SONET The SY88702 is a high-speed current switch for driving a semiconductor laser diode in optical transmission applications. The modulation current IOUT is controlled by the current IRSET through the external resistor RSET. The output OUT is HIGH and no current flows through OUT when output enable is HIGH. The device incorporates complementary open collector outputs with 25mA maximum current driving capability. The external resistor REXT must be placed between /OUT and VCC to dissipate the worst case power. RSER is recommended to compensate for laser diode matching issues. The SY88702 utilizes the high performance bipolar ASSET technology. FUNCTIONAL BLOCK DIAGRAM DIN /DIN REXT /OUT Internal Logic IMOD 40X VREF RSET VEE RSET OUT RSER to Laser Diode VCC GND ASSET is a trademark of Micrel, Inc. 1 Micrel PACKAGE/ORDERING INFORMATION /EN 1 DIN 2 /DIN 3 VREF 4 RSET 5 10 VCC 9 OUT 8 /OUT 7 GND 6 GND 10-Pin MSOP K10-1 SY88702 Ordering Information Part Number SY88702KC SY88702KCTR* SY88702KI SY88702KITR* *Tape and Reel Package Type K10-1 K10-1 K10-1 K10-1 Operating Range Commercial Industrial Package Marking PIN DESCRIPTION Pin Number 1 2, 3 4 5 6, 7 9, 8 10 Pin Name /EN DIN, /DIN VREF RSET GND OUT, /OUT VCC Pin Function 100k PECL compatible input with pull-down resistor. Modulation current goes to zero when deasserted high. Differential 100k PECL compatible input with pull-down resistors. Voltage reference for use with RSET. An external resistor connected from here to VREF sets the reference current for IOUT. Device ground. Differential open collector current outputs. Positive power supply. TRUTH TABLE 1 Note L = LOW, H = HIGH, X = don't care. Note H = IOUT = 0mA. OUT 2 H L H /OUT L H L Micrel SY88702 Absolute Maximum Ratings Note 1 Power Supply Voltage VCC 0V to +7.0V Input Voltage VIN 0V to VCC Output Current IOUT 25mA Power Dissipation PD 250mW Storage Temperature Range TS to +125°C Operating Ratings Notes 2,3,4 Supply Voltage VCC +4.5V to +5.5V Ambient Temperature TA , Note 5 to +85°C Junction Temperature TJ , Note 5 to 100°C Resistor to Dissipate Power REXT to Laser Diode Serial Resistor RSER to Resistor to Adjust Current RSET to Package Thermal Resistance MSOP Still-Air 113°C/W Still-Air 74°C/W DC ELECTRICAL CHARACTERISTICS GND = 0V VCC = 5V ±10% TA = to +85°C Parameter Condition Max Units VREF IIL ICC IOUT_OFF Input HIGH Voltage DIN, /DIN, /EN Input LOW Voltage DIN, /DIN, /EN Reference Voltage Input LOW Current DIN, /DIN, /EN Input HIGH Current DIN, /DIN, /EN Supply Current Output LOW Current /EN = HIGH VIN = VIL min IMOD = 25mA IOUT ARSET VOUT COUT Modulation Current IOUT/IRSET Voltage at OUT, /OUT Capacitance on OUT, /OUT Note Note

PDF Datasheet Preview

Micrel
5V 622Mbps LASER DIODE DRIVER WITH OUTPUT ENABLE

SY88702

SY88702
s Up to 622Mbps operation s Modulation current to 25mA s PECL output enable s Differential PECL inputs s Single 5V power supply s Available in a tiny 10-pin 3mm MSOP
s 622Mbps SONET

The SY88702 is a high-speed current switch for driving a semiconductor laser diode in optical transmission applications. The modulation current IOUT is controlled by the current IRSET through the external resistor RSET. The output OUT is HIGH and no current flows through OUT when output enable is HIGH.

The device incorporates complementary open collector outputs with 25mA maximum current driving capability. The external resistor REXT must be placed between /OUT and VCC to dissipate the worst case power. RSER is recommended to compensate for laser diode matching issues.

The SY88702 utilizes the high performance bipolar ASSET technology.

FUNCTIONAL BLOCK DIAGRAM

DIN /DIN

REXT /OUT

Internal Logic

IMOD 40X

VREF

RSET

VEE RSET

OUT RSER
to Laser Diode

VCC GND

ASSET is a trademark of Micrel, Inc. 1

Micrel
PACKAGE/ORDERING INFORMATION
/EN 1 DIN 2 /DIN 3 VREF 4 RSET 5
10 VCC 9 OUT 8 /OUT 7 GND 6 GND
10-Pin MSOP K10-1

SY88702
Ordering Information

Part Number SY88702KC SY88702KCTR* SY88702KI SY88702KITR* *Tape and Reel

Package Type K10-1 K10-1 K10-1 K10-1

Operating Range

Commercial

Industrial

Package Marking

PIN DESCRIPTION

Pin Number 1
2, 3 4 5
6, 7 9, 8 10

Pin Name /EN

DIN, /DIN VREF RSET GND

OUT, /OUT VCC

Pin Function 100k PECL compatible input with pull-down resistor. Modulation current goes to zero when deasserted high. Differential 100k PECL compatible input with pull-down resistors. Voltage reference for use with RSET. An external resistor connected from here to VREF sets the reference current for IOUT. Device ground. Differential open collector current outputs. Positive power supply.

TRUTH TABLE 1

Note L = LOW, H = HIGH, X = don't care. Note H = IOUT = 0mA.

OUT 2 H L H
/OUT L H L

Micrel

SY88702

Absolute Maximum Ratings Note 1

Power Supply Voltage VCC 0V to +7.0V Input Voltage VIN 0V to VCC Output Current IOUT 25mA Power Dissipation PD 250mW Storage Temperature Range TS to +125°C

Operating Ratings Notes 2,3,4

Supply Voltage VCC +4.5V to +5.5V Ambient Temperature TA , Note 5 to +85°C Junction Temperature TJ , Note 5 to 100°C Resistor to Dissipate Power REXT to Laser Diode Serial Resistor RSER to Resistor to Adjust Current RSET to Package Thermal Resistance

MSOP Still-Air 113°C/W Still-Air 74°C/W

DC ELECTRICAL CHARACTERISTICS

GND = 0V VCC = 5V ±10% TA = to +85°C

Parameter

Condition

Max Units

VREF IIL

ICC IOUT_OFF

Input HIGH Voltage DIN, /DIN, /EN Input LOW Voltage DIN, /DIN, /EN Reference Voltage

Input LOW Current DIN, /DIN, /EN Input HIGH Current DIN, /DIN, /EN Supply Current

Output LOW Current /EN = HIGH

VIN = VIL min IMOD = 25mA

IOUT ARSET VOUT COUT

Modulation Current IOUT/IRSET Voltage at OUT, /OUT Capacitance on OUT, /OUT

Note

Note

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Datasheet ID: SY88702KI 647953