Datasheet SY88822V Datasheet (Micrel)

查询SY88822V供应商

Micrel

5V/3.3V 155Mbps
LASER DIODE DRIVER
WITH OUTPUT ENABLE

SY88822V

SY88822V

FEATURES

■ Single 3.3V or 5V power supply

■ Up to 155Mbps operation

■ Modulation current to 30mA

■ PECL output enable

■ Differential PECL inputs

■ Available in a tiny 10-pin (3mm) MSOP

APPLICATIONS

■ 155Mbps SONET

DESCRIPTION

The SY88822V is a high speed current switch for driving
a semiconductor laser diode in optical transmission
applications. The modulation current (I
the current (I

) through the external resistor R

RSET

output OUT is HIGH and no current flows through OUT
when output enable is HIGH.

The device incorporates complementary open collector
outputs with a 30mA maximum current driving capability.
The external resistor R

must be placed between /OUT

EXT

and VCC to dissipate the worst case power. R
recommended to compensate for laser diode matching
issues. Pin 9 and pin 10 should be connected to achieve
better performance.

The SY88822V utilizes the high performance bipolar
ASSET™ technology.

) is controlled by

OUT

SET

. The

SER

is

FUNCTIONAL BLOCK DIAGRAM

DIN

/DIN

/EN

Internal

Logic

V

REF

V

CC

R

EXT

/OUT

OUT

R

SER

to Laser Diode

I

MOD

40X

GND

R

SET

R

SET

V

CC

GND

ASSET is a trademark of Micrel, Inc.

Rev.: A Amendment: /0

1

Issue Date: March 2003

Micrel

PACKAGE/ORDERING INFORMATION

SY88822V

Ordering Information

Package Operating Package

DIN

/DIN
VREF
RSET VCC65

1/EN
2
3
4

10 OUT

OUT

9

/OUT

8

GND

7

Part Number Type Range Marking

SY88822VKC K10-1 Commercial 822V
SY88822VKCTR* K10-1 Commercial 822V
SY88822VKI K10-1 Industrial 822V
SY88822VKITR* K10-1 Industrial 822V

10-Pin MSOP

*Tape and Reel

(K10-1)

PIN DESCRIPTION

Pin Number Pin Name Pin Function

1 /EN 100k PECL compatible input w/ 75kΩ pulldown resistor. Modulation current goes to zero

when deasserted high.

2, 3 DIN, /DIN Differential 100k PECL compatible input w/ 75kΩ pulldown resistors.

4 VREF Voltage reference for use with R
5 RSET An external resistor from here to V
6 VCC Positive power supply.
7 GND Device ground.

8, 9, 10 /OUT, OUT Differential open collector current outputs.

.

SET

sets the reference current for I

REF

OUT

.

TRUTH TABLE

D /D /EN OUT

(Note1)

(Note 2)

/OUT

LHLHL
HLLLH
XXHHL

Note 1. L = LOW, H = HIGH, X = don't care.
Note 2. H = I

OUT

= 0mA.

2

Micrel

SY88822V

Absolute Maximum Ratings

(Note 1)

Power Supply Voltage (VCC)............................ 0V to +7.0V

Input Voltage (VIN) .............................................. 0V to V

Output Current (I

).................................................30mA

OUT

CC

Power Dissipation (PD) ...........................................250mW

Storage Temperature Range (TS)............–55°C to +125°C

Operating Ratings

Supply Voltage (VIN) ................................... +3.0V to +3.6V

........................................................ or +4.5V to +5.5V

Ambient Temperature (TA), Note 5 ............–40°C to +85°C

Junction Temperature (TJ), Note 5 ............ –40°C to 100°C

Resistor to Dissipate Power (R
Laser Diode Serial Resistor (R
Resistor to Adjust Current (R

(Notes 2, 3, 4)

) ..................10Ω to 50Ω

EXT

) ....................0Ω to 50Ω

SER

), Note 6

SET

......................................................... 700Ω to 20,000Ω

Package Thermal Resistance

MSOP

(θJA) Still-Air ......................................................113°C/W

(ψJB) Still-Air........................................................74°C/W

Note 1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation

Note 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Note 3. The device is guaranteed to meet the DC specifications, shown in the table above, after thermal equilibrium has been established. The device

Note 4. The voltage drop across R
Note 5. Commercial devices are guaranteed from 0°C to +85°C ambient temperature.
Note 6. R

is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to ABSOLUTE MAXIMUM
RATlNG conditions for extended periods may affect device reliability.

is tested in a socket such that transverse airflow of ≥500lfpm is maintained.

minimum 430Ω.

SET

EXT

and R

plus Laser Diode must not be greater than 1.4V.

SER

DC ELECTRICAL CHARACTERISTICS

(Note 1)

GND = 0V; VCC = 3.3V ±10% or VCC = 5.0V ±10%; TA = –40°C to +85°C

Symbol Parameter Condition Min Typ Max Units

V

V

V
I

IH

IL

REF

IL

Input HIGH Voltage

VCC–1.165 VCC–0.880

(DIN, /DIN, /EN)
Input LOW Voltage

VCC–1.810 VCC–1.475

(DIN, /DIN, /EN)
Reference Voltage 1.7 2.0 2.3 V
Input LOW Current VI = V

IL(min)

0.5 µA

V

V

(DIN, /DIN, /EN)

I

IH

I

CC

I

OUT_OFF

Input HIGH Current 100 µA
(DIN, /DIN, /EN)

Supply Current I

= 25mA 25 mA

MOD

Output LOW Current 450 1000 µA
(/EN = HIGH)

I

OUT

A

RSET

V

OUT

C

OUT

Note 1. Specification for packaged product only.

Modulation Current 30 mA
I

OUT/IRSET

Voltage at OUT, /OUT

30 38 44 —

VCC–1.4 V

CC

V

Capacitance on OUT, /OUT 2.5 pF

3

Micrel

SY88822V

AC ELECTRICAL CHARACTERISTICS

I

=10mA; GND = 0V; VCC = 3.3V ±10% or VCC = 5.0V ±10%; TA = –40°C to +85°C

MOD

(Note 1, 2)

Symbol Parameter Condition Min Typ Max Units

t

PHL, tPLH

t

PHL, tPLH

D Propagation Delay I

DIN – OUT

EN Propagation Delay I

= 10mA 1000 ps

OUT

= 10mA 1000 ps

OUT

/EN – OUT

t

, t

r

f

Rise/Fall Time 1000 ps
(20% to 80%)

I

OR

Note 1. Specification for packaged product only.
Note 1. R

Output Current Ringing I

= R

EXT

= 25Ω ±1%; R

SER

connected directly to VCC.

SER

= 5 to 30mA 10 %

OUT

TYPICAL OPERATING CHARACTERISTICS

40

30

(mA)

20

MOD

I

VCC = 3.3V

10

0

0.0 1.0 2.0 3.0 4.0 5.0

I

MOD

VCC = 5.0V

RSET (kΩ)

vs. R

SET

4

Micrel

10 LEAD MSOP (K10-1)

SY88822V

Rev. 00

MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.

Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.

TEL + 1 [phone] FAX + 1 [phone] WEB http://www.micrel.com

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s

use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify

Micrel for any damages resulting from such use or sale.

© 2003 Micrel, Incorporated.

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