The SY100EL1001 is a high speed current source for
driving a semiconductor laser diode in optical transmission
applications. The output current modulation is DC –
voltage controlled. The integrated circuit contains the
following functional blocks:
•
•
•
•
Input Line Receiver
D Flip-Flop
Bias Control Circuitry
Output Current Switch
A logic HIGH level at the data input results in the
modulation current flowing through the OUT pin on the
next rising edge of the clock. A logic HIGH level at the
master reset input will disable the modulation current.
The device incorporates complementary open collector
outputs with a capability of driving peak current of 75
mA.
The laser driver current is adjustable by selection of
R
SET
. The resistor R
EXT
must be placed between /OUT
and V
CC
to dissipate the worst case power. R
SER
is
recommended to fix laser diode matching issues.
The SY100EL1001 utilizes the high performance
bipolar ASSET™ technology.
BLOCK DIAGRAM
V
CC
R
EXT
V
BB
OUT
OUT
R
SER
D, D
CLK, CLK
MR
D Flip-Flop
to Laser Diode
BIAS
Control
Modulation Control
MC
R
SET
V
EE
ASSET is a trademark of Micrel, Inc.
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
Rev.: I
Amendment: /0
1
1
Issue Date: March 2006
Micrel, Inc.
SY100EL1001
PACKAGE/ORDERING INFORMATION
Ordering Information
(1)
NC
CLK
CLK
R
SET
V
CCO
D
D
MR
1
2
3
4
5
6
7
8
16
15
14
V
CC
NC
MC
OUT
OUT
V
BB
NC
V
EE
Part Number
SY100EL1001ZC
SY100EL1001ZCTR
(2)
SY100EL1001ZI
SY100EL1001ZITR
(2)
SY100EL1001ZG
(3)
SY100EL1001ZGTR
(2, 3)
Package
Type
Z16-2
Z16-2
Z16-2
Z16-2
Z16-2
Z16-2
Operating
Range
Commercial
Commercial
Industrial
Industrial
Industrial
Industrial
Package
Marking
SY100EL1001ZC
SY100EL1001ZC
SY100EL1001ZI
SY100EL1001ZI
SY100EL1001ZG with
Pb-Free bar-line indicator
SY100EL1001ZG with
Pb-Free bar-line indicator
Lead
Finish
Sn-Pb
Sn-Pb
Sn-Pb
Sn-Pb
Pb-Free
NiPdAu
Pb-Free
NiPdAu
Top View
SOIC
Z16-2
13
12
11
10
9
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC Electricals only.
2. Tape and Reel.
3. Pb-Free package is recommended for new designs.
16-Pin Narrow SOIC (Z16-2)
PIN NAMES
Pin
V
CC
, V
CCO
Function
Most positive power supply pins separation helps
to isolate sensitive circuitry from noise
generating function. +5V for PECL operation
or ground for ECL operation.
Most negative power supply input. Ground
for PECL operation or -5V for ECL operation.
This pin provides a reference voltage for use
in single ended applications or when the
input signal is AC coupled into the device.
These differential ECL/PECL 100K
compatible inputs receive NRZ data.
These differential clock inputs
This ECL/PECL 100K compatible input resets
the Laser Driver Logic - modulation current
transitions to zero when asserted high.
Open collector outputs from the modulation
buffer drive these differential current outputs.
An external voltage sets the main value of
modulation current I
O
.
An external resistor sets the source current
for modulation Imod.
These pins are not connected.
TRUTH TABLE
(1)
D
L
H
X
/D
H
L
X
CLK
Z
Z
X
/CLK
ZZ
ZZ
X
MR
L
L
H
OUT
H
L
H
/OUT
L
H
L
V
EE
V
BB
Note:
1. L = LOW, H = HIGH, Z = LOW-to-HIGH transition,
ZZ = HIGH-to-LOW transition, X = don't care.
D,/D
CLK, /CLK
MR
OUT, /OUT
MC
R
SET
NC
M9999-031306
hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
SY100EL1001
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
CC
V
IN
I
OUT
T
LEAD
T
A
P
D
Rating
Power Supply Voltage (V
CC
= 0V)
Input Voltage (V
CC
= 0V)
Output Current
Lead Temperatre (soldering, 20sec.)
Operating Temperature Range
Power Dissipation
Value
0 to –7.0
0 to –6.0
75
+260
–40 to +85
500
Unit
V
V
mA
°C
°C
mW
Note:
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 ratlng conditions for extended periods
