ChipFind - документация

Электронный компонент: SY88922VKCTR

Скачать:  PDF   ZIP
1
SY88922V
Micrel, Inc.
M9999-082205
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
s
Up to 2.5Gbps operation
s
30mA modulation current
s
Separate modulation control
s
Separate output enable for laser safety
s
Differential inputs for data
s
75K
input pull-down resistor
s
3.3V and 5V power supply options
s
Available in a tiny 10-pin (3mm


3mm) MSOP
The SY88922V is a high-speed current switch for
driving a semiconductor laser diode in optical transmission
applications. The modulation current (I
OUT
) is controlled
by the current (I
RSET
) through the external resistor R
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.
The resistor R
EXT
must be placed between /OUT and
V
CC
to dissipate the worst case power. R
SER
is
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
ASSETTM technology.
All support documentation can be found on Micrel's web
site at www.micrel.com.
FEATURES
5V/3.3V 2.5Gbps
LASER DIODE DRIVER
BLOCK DIAGRAM
SY88922V
s
1.25Gbps and 2.5Gpbs Gigabit Ethernet
s
531Mbps, 1062Mbps and 2.12Gbps Fibre Channel
s
622Mbps SONET
s
Gigabit Interface Converter
s
2.5Gbps SDH/SONET
s
2.5Gbps Proprietary Links
APPLICATIONS
D
IN
V
CC
R
EXT
/OUT
OUT
R
SER
to Laser Diode
/D
IN
Modulation Control
Internal Logic
BIAS
Control
/EN
I
MOD
V
REF
40X
R
SET
GND
V
CC
GND
R
SET
Rev.: E
Amendment: /0
Issue Date:
August 2005
ASSET is a trademark of Micrel, Inc.
2
SY88922V
Micrel, Inc.
M9999-082205
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
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
Differential PECL 100k compatible inputs which receive NRZ data.
4
VREF
Voltage reference for use with R
SET
.
5
RSET
An external resistor sets up the source current for modulation I
MOD
.
6
VCC
Most positive power supply input.
7
GND
Ground.
8, 9, 10
/OUT, OUT
Open collector outputs from the modulation buffer drive these differential current outputs.
PIN DESCRIPTION
RSET
VCC
6
5
1
/EN
DIN
/DIN
VREF
10 OUT
OUT
/OUT
GND
9
8
7
2
3
4
10-Pin MSOP (K10-1)
D
/D
/EN
OUT
(2)
/OUT
L
H
L
H
L
H
L
L
L
H
X
X
H
H
L
Notes:
1. L = LOW, H = HIGH, X = don't care.
2. H = I
OUT
= 0mA.
TRUTH TABLE
(1)
Ordering Information
(1)
Package
Operating
Package
Lead
Part Number
Type
Range
Marking
Finish
SY88922VKC
K10-1
Commercial
SY88922V
Sn-Pb
SY88922VKCTR
(2)
K10-1
Commercial
SY88922V
Sn-Pb
SY88922VKG
K10-1
Industrial
SY88922V with
Pb-Free
Pb-Free bar-line indicator
NiPdAu
SY88922VKGTR
(2)
K10-1
Industrial
SY88922V with
Pb-Free
Pb-Free bar-line indicator
NiPdAu
Notes:
1. Contact factory for die availability. Die is guaranteed at T
A
= 25
C, DC electricals only.
2. Tape and Reel.
3
SY88922V
Micrel, Inc.
M9999-082205
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings
(1)
Supply Voltage (V
CC
) ..................................... +0V to +7.0V
Input Voltage (V
IN
) ................................................. 0 to V
CC
Output Current (V
OUT
) ............................................... 30mA
Power Dissipation (P
D
) ........................................... 250mW
Lead Temperature (soldering, 20 sec.) ..................... 260
C
Storage Temperature (T
S
) ....................... 55
C to +125
C
Operating Ratings
(2)
Supply Voltage (V
CC
) .............................. +4.5V to +5.5V or
............................................................ +3.0V to +3.6V
Ambient Temperature (T
A
) ......................... 40
C to +85
C
Capacitance on OUT + /OUT (C
OUT
) ................ 2.5pF (typ.)
Resistor to Dissipate Power (R
EXT
) .................... 10 to 50
Laser Diode Serial Resistor (R
SER
) ...................... 0 to 50
Resistor to Adjust Current (R
SET
)
(4) ...............
700 to 20,000
Package Thermal Resistance
(3)
MSOP
(
JA
) Still-air ........................................... 113
C/W
MSOP
(
JB
) ........................................................ 74
C/W
GND = 0V; V
CC
= +5.0V
10% or V
CC
= +3.3V
10%; T
A
= 40
C to +85
C; unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
IH
Input HIGH Voltage (D
IN
, /D
IN
, /EN)
V
CC
1165
V
CC
880
mV
V
IL
Input LOW Voltage (D
IN
, /D
IN
, /EN)
V
CC
1810
V
CC
1475
mV
V
REF
Reference Voltage
1.7
2.0
2.3
V
I
IL
Input LOW Current
0.5
A
(D
IN
, /D
IN
, /EN)
(5)
I
IH
Input HIGH Current (D
IN
, /D
IN
, /EN)
100
A
I
CC
Supply Current
(6)
25
mA
I
OL
Output LOW Current (/EN = HIGH)
450
1000
A
I
OUT
Modulation Current
30
mA
I
RSET
Modulation Control
0.125
0.625
mA
A
RSET
=I
OUT
/I
RSET
30
38
44
--
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
EXT
and R
SER
plus Laser Diode should not be greater than 1V.
3. Still-air without heatsink.
4. R
SET
minimum 430
.
5. V
IN
= V
IL
(min).
6. I
MOD
= 25mA.
DC ELECTRICAL CHARACTERISTICS
4
SY88922V
Micrel, Inc.
M9999-082205
hbwhelp@micrel.com or (408) 955-1690
I
MOD
=10mA; GND = 0V; V
CC
= +5V
10% or V
CC
= +3.3V
10%; T
A
= 40
C to +85
C; unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
t
pd
D
Propagation Delay (D
IN
OUT)
400
ps
t
pd
EN
Propagation Delay (/EN OUT)
400
ps
t
r
,
t
f
Rise/Fall Time
(8)
74
130
ps
(20% to 80%)
I
OR
Output Current Ringing
(9)
10
%
D
J
Deterministic Jitter
(10)
7
ps
rms
Notes:
7. R
EXT
= R
SER
= 25
1%; R
SER
connects to V
CC
directly without Laser Diode.
8. I
MOD
= 10mA.
9. I
OH
= 5 to 25mA.
10. I
MOD
= 10mA, 2.5Gbps, 2
23
1 pattern.
AC ELECTRICAL CHARACTERISTICS
(7)
TYPICAL CHARACTERISTICS
0
10
20
30
40
0.0
1.0
2.0
3.0
4.0
5.0
I
OUT
(
A)
R
SET
(k
)
I
OUT
vs. R
SET
V
CC
= 3.3V
V
CC
= 5.0V
5
SY88922V
Micrel, Inc.
M9999-082205
hbwhelp@micrel.com or (408) 955-1690
10 LEAD MSOP (K10-1)
Rev. 00
MICREL, INC.
2180 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.
2005 Micrel, Incorporated.