SY88922VTR [MICROCHIP]
SPECIALTY INTERFACE CIRCUIT, PDSO10, MSOP-10;
| 型号： | SY88922VTR |
| 厂家： | 
MICROCHIP |
| 描述： | SPECIALTY INTERFACE CIRCUIT, PDSO10, MSOP-10 光电二极管 接口集成电路 |
| 文件： | 总5页 (文件大小：47K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
5V/3.3V 2.5Gbps
LASER DIODE DRIVER
SY88922V
DESCRIPTION
FEATURES
■ Up to 2.5Gbps operation
The SY88922V is a high-speed current switch for
driving a semiconductor laser diode in optical transmission
■ 30mA modulation current
applications. The modulation current (I
) is controlled
OUT
■ Separate modulation control
■ Separate output enable for laser safety
■ Differential inputs for data
by the current (I
) through the external resistor R
.
RSET
SET
The output OUT is HIGH when output enable is HIGH.
The device incorporates complementary open collector
outputs with a capability of driving peak current of 30mA.
■ 75KΩ input pull-down resistor
■ 3.3V and 5V power supply options
■ Available in a tiny 10-pin (3mm × 3mm) MSOP
The resistor R
must be placed between /OUT and
EXT
V
to dissipate the worst case power. R
is
CC
SER
recommended to compensate for laser diode matching
issues. Pin 9 and pin 10 should be connected to achieve
better performance.
The SY88922V utilizes the high-performance bipolar
ASSET™ technology.
APPLICATIONS
All support documentation can be found on Micrel’s web
site at www.micrel.com.
■ 1.25Gbps and 2.5Gpbs Gigabit Ethernet
■ 531Mbps, 1062Mbps and 2.12Gbps Fibre Channel
■ 622Mbps SONET
■ Gigabit Interface Converter
■ 2.5Gbps SDH/SONET
■ 2.5Gbps Proprietary Links
BLOCK DIAGRAM
VCC
REXT
/OUT
OUT
RSER
DIN
Internal Logic
/DIN
to Laser Diode
IMOD
/EN
BIAS
Control
40X
VCC
GND
Modulation Control
GND
RSET
VREF
RSET
ASSET is a trademark of Micrel, Inc.
M0766-012804
Rev.: D
Amendment:/0
Issue Date: May 2004
1
hbwhelp@micrel.com or (408) 955-1690
Micrel
SY88922V
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
Package
Operating
Range
Package
Marking
/EN
DIN
1
2
3
4
5
10 OUT
Part Number
SY88922V
SY88922VTR(2)
Type
K10-1
K10-1
9
8
7
6
OUT
/OUT
GND
VCC
Commercial
Commercial
SY88922V
SY88922V
/DIN
VREF
RSET
Notes:
1. Contact factory for die availability. Die is guaranteed at T = 25°C, DC
A
electricals only.
10-Pin MSOP (K10-1)
2. Tape and Reel.
PIN DESCRIPTION
Pin Number
Pin Name
Pin Function
1
/EN
Enable. This PECL 100k compatible input enables Laser Driver. Modulation current goes
to zero when asserted HIGH.
2, 3
DIN, /DIN
VREF
Differential PECL 100k compatible inputs which receive NRZ data.
4
Voltage reference for use with RSET.
5
RSET
An external resistor sets up the source current for modulation IMOD.
6
7
VCC
Most positive power supply input.
Ground.
GND
8, 9, 10
/OUT, OUT
Open collector outputs from the modulation buffer drive these differential current outputs.
(1)
TRUTH TABLE
D
L
/D
H
L
/EN
L
OUT (2)
/OUT
H
L
L
H
L
H
X
L
X
H
H
Notes:
1. L = LOW, H = HIGH, X = don't care.
2. H = I = 0mA.
OUT
M0766-012804
hbwhelp@micrel.com or (408) 955-1690
2
Micrel
SY88922V
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (V ) ..................................... +0V to +7.0V
Supply Voltage (V ) .............................. +4.5V to +5.5V or
CC
CC
............................................................ +3.0V to +3.6V
Input Voltage (V ) .................................................0 to V
IN
CC
Ambient Temperature (T ) ......................... –40°C to +85°C
Output Current (V
) ...............................................30mA
A
OUT
Capacitance on OUT + /OUT (C
Resistor to Dissipate Power (R
) ................2.5pF (typ.)
Power Dissipation (P ) ...........................................250mW
OUT
D
) .................... 10 to 50Ω
Lead Temperature (soldering, 10 sec.) ..................... 265°C
EXT
Laser Diode Serial Resistor (R
Resistor to Adjust Current (R
) ...................... 0 to 50Ω
Storage Temperature (T ) ....................... –55°C to +125°C
SER
S
(4)
)
...............700 to 20,000Ω
SET
(3)
Package Thermal Resistance
MSOP (θ ) Still-air ...........................................113°C/W
JA
MSOP (Ψ ) ........................................................74°C/W
JB
DC ELECTRICAL CHARACTERISTICS
GND = 0V; VCC = +5.0V ±10% or VCC = +3.3V ±10%; TA = –40°C to +85°C; unless noted.
Symbol
VIH
Parameter
Condition
Min
VCC –1165
VCC –1810
1.7
Typ
Max
Units
Input HIGH Voltage (DIN, /DIN, /EN)
Input LOW Voltage (DIN, /DIN, /EN)
Reference Voltage
VCC –880
mV
VIL
VCC –1475 mV
VREF
IIL
2.0
2.3
V
Input LOW Current
(DIN, /DIN, /EN)(5)
0.5
µA
IIH
Input HIGH Current (DIN, /DIN, /EN)
Supply Current(6)
100
25
µA
mA
µA
mA
mA
—
ICC
IOL
Output LOW Current (/EN = HIGH)
Modulation Current
450
38
1000
30
IOUT
IRSET
ARSET
Modulation Control
0.125
30
0.625
44
=IOUT /IRSET
Notes:
1. Permanent device damage may occur if Absolute Maximum Ratings are exceeded. This is a stress rating only and functional operation is not implied
at conditions other than those detailed in the operational sections of this data sheet. Exposure to Absolute Maximum Ratings conditions for extended
periods may affect device reliability.
2. The voltage drop across R
3. Still-air without heatsink.
and R
plus Laser Diode should not be greater than 1V.
EXT
SER
4.
5.
6.
R
minimum 430Ω.
SET
V
= V (min).
IN
IL
I
= 25mA.
MOD
M0766-012804
hbwhelp@micrel.com or (408) 955-1690
3
Micrel
SY88922V
(7)
AC ELECTRICAL CHARACTERISTICS
IMOD =10mA; GND = 0V; VCC = +5V ±10% or VCC = +3.3V ±10%; TA = –40°C to +85°C; unless noted.
Symbol
tpd
Parameter
Condition
Min
Typ
400
400
74
Max
Units
ps
D
Propagation Delay (DIN – OUT)
Propagation Delay (/EN – OUT)
tpd EN
tr, tf
ps
Rise/Fall Time(8)
(20% to 80%)
130
10
ps
IOR
DJ
Output Current Ringing(9)
Deterministic Jitter(10)
%
7
psrms
Notes:
7.
8.
9.
R
I
= R
= 25Ω ±1%; R
connects to V directly without Laser Diode.
EXT
SER
SER CC
= 10mA.
MOD
I
= 5 to 25mA.
OH
23
10. I
= 10mA, 2.5Gbps, 2 –1 pattern.
MOD
TYPICAL CHARACTERISTICS
I
vs. R
SET
OUT
40
30
20
10
0
VCC = 5.0V
VCC = 3.3V
0.0
1.0
2.0
3.0
(kΩ)
4.0
5.0
R
SET
M0766-012804
hbwhelp@micrel.com or (408) 955-1690
4
Micrel
SY88922V
10 LEAD MSOP (K10-1)
Rev. 00
MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet 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.
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.
© 2004 Micrel, Incorporated.
M0766-012804
hbwhelp@micrel.com or (408) 955-1690
5
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