1
CXB1558Q-Y
32 pin QFP (Ceramic)
E94720-PK
Laser Driver
Description
The CXB1558Q-Y is a high-speed monolithic
Laser Driver/Current Switch with ECL input level.
Open collector outputs are provided at the output
pins (Q, Q) and have the capability of driving
modulation current of 60mApp at a max. data rate of
2.0Gbps (NRZ). DRIVADJ and SDRIV inputs control
the modulation current amplitude, and BIASADJ,
SBIAS inputs control the bias current. Modulation
and bias current can be controlled by either voltage
or current through these pins. This device includes
D-FF for duty cycle correction and Laser Shutdown
function.
Features
· Maximum data rate (NRZ): 2.0Gbps (Typ.)
· Differential Data input: ECL
· D-FF for Duty Cycle Correction
· Laser Shutdown Input: TTL
Applications
· SONET/SDH: 155,622Mb/s,1.2Gb/s
· Fiber channel: 133,266,532Mb/s,1.062Gb/s
· FDDI: 125Mb/s ESCON: 200Mb/s HDTV: 1.5Gb/s
Absolute Maximum Ratings
· Supply voltage
Vcc V
EE
0.3 to +7.0
V
· Input voltage
V
IN
V
EE
to +0.5
V
· Differential input voltage
|V
IN
V
IN
|
0 to 2.5
V
· Differential clock voltage
|V
CLK
V
CLK
|
0 to 2.5
V
· Output current (Continuous)
I
Q
, I
BIAS
0 to 80
mA
Input current (Continuous)
I
DRVADJ
0 to 8
mA
I
BIASADJ
0 to 8
mA
· Storage temperature
Tstg
65 to +150
°C
Recommended Operating Conditions
· DC power supply voltage
Vcc V
EE
4.75 to 5.46
V
· Operating case temperature
Tc
0 to +85
°C
Structure
Bipolar silicon monolithic IC
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
2
CXB1558Q-Y
Block Diagram and Pin Assignment
NC
LDOFF
CLK
CLK
V
EE
NC
V
CC
2
NC
BIASADJ
NC
NC
NC
NC
NC
V
EE
2
SBIAS
D
V
BB
P
P
D
V
CC
1
V
EE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
22
23
24
25
26
27
28
29
30
31
32
1
MODULATION
GENERATOR
BIAS
GENERATOR
INPUT SIGNAL
MONITOR
DRIVADJ
VOLTAGE
SOURCE
BIASA
SDRIV
BIASB
Q
Q
V
EE
2
Q
Q
D-FF
20
21
Truth table
LDOFF
H
H
L
L
L
H
L
H
H
L
H
H
H
L
H
L
D
Q
P
In a case of resistor load.
3
CXB1558Q-Y
Pin
No.
1
32
2, 10
3
4
5
6
7
8
9
11
20
21
19
Symbol
DC
0mA to
8mA
1
0mA to
6mA
2
V
EE
to
V
EE
+2.5V
AC
Equivalent circuit
Description
Modulation generator
current monitor.
Modulation generator
current adjustment.
5.2V
--
--
Negative power supply
pin.
Modulation generator
current output.
Bias generator current
output.
Bias generator current
monitor.
Bias generator current
adjustment.
Clock signal input.
Typical voltage (V)
1
2
3
4
5
6
32
10
V
EE
V
CC
2
7
8
9
11
10
V
EE
V
CC
29
19
20
21
200
200
V
CC
V
EE
0mA to
60mA
1
0mA to
40mA
2
0mA to
60mA
1
0mA to
40mA
2
SDRIV
DRIVADJ
V
EE
2
Q
Q
BIASB
BIASA
0mA to
30mA
--
SBIAS
BIASADJ
0mA to
8mA
--
V
EE
to
V
EE
+2.5V
--
CLK
CLK
V
EE
--
1.84V to
0.81V
5.2V
--
1
V
EE
= 5.46V to 4.94V
2
V
EE
= 4.94V to 4.75V
Pin Description
--
4
CXB1558Q-Y
Pin
No.
26
Symbol
DC
1.3V
AC
Equivalent circuit
Description
Reference voltage
(1.3V)
Use for the reference
voltage in the case of
single-phase input.
Max. drive current
±200µA
Negative power supply
pin.
Data signal input.
Positive power supply
pin.
Typical voltage (V)
900
V
CC
V
EE
500µ
26
29
200
200
V
CC
V
EE
25
28
27
200
V
EE
1.7mA
30
31
200
V
BB
--
25
5.2V
V
EE
1
--
27
--
D
28
D
1.84V to
0.81V
0V
29
V
CC
1
--
--
30
P
--
31
P
0mA to
2.7mA
Input signal monitor
output.
5
CXB1558Q-Y
Electrical Characteristics
· DC Electrical Characteristics
(V
CC
1 = V
CC
2 = GND, V
EE
1 = V
EE
2 = 5.46 to 4.75V, Tc = 0 to +85°C)
I
Q
= 0mA, I
BIAS
= 0mA
I
Q
= 60mA, I
BIAS
= 60mA
V
EE
= 5.46 to 4.94V
V
EE
= 4.94 to 4.75V
Tc = 25°C
I
BIASA
+ I
BIASB
at voltage control
application
at voltage control
application
Tc = 25°C
110
260
60
40
2.5
60
2.7
2.7
2.7
1
2.5
1.17
1.84
--
V
EE
+ 2.0
V
EE
0.5
--
320
1.38
78
213
--
--
--
--
--
--
--
1.7
--
--
--
--
--
--
--
--
1.32
--
--
--
--
2.0
--
0.0
0.0
0.0
2.7
2.0
0.81
1.48
20
Vcc
V
EE
+ 0.8
10
--
1.26
mA
V
mA
V
mA
V
µA
V
µA
V
Power supply current
Max. Modulation current
Modulation output voltage range
Max. Bias current
Bias output voltage range
Modulation current monitor output
voltage range
Bias current monitor output voltage
range
Input signal monitor current
Input signal monitor output voltage
range
ECL Input High voltage
ECL Input Low voltage
ECL Input High current
TTL Input High voltage
TTL Input Low voltage
TTL Input High current
TTL Input Low current
Reference bias voltage
I
EE
I
Q
V
Q
I
BIAS
V
BIAS
V
SQ
V
SBIAS
I
P
V
P
V
EDH
V
EDL
I
EDH
V
TDH
V
TDL
I
TDH
I
TDL
V
BB
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Ratio of current setup
at voltage control application
at current control application
at voltage control application
at current control application
Modulation current
vs. Modulation monitor current
Modulation current
vs. Modulation control current
Bias current vs. Bias monitor current
Bias current vs. Bias control current
S1
S2
S3
S4
9.0
6.5
11.0
7.4
11.4
8.6
12.0
9.8
12.0
10.5
13.0
12.0
Item
Symbol
Condition
Min.
Typ.
Max.
6
CXB1558Q-Y
· AC Electrical Characteristics
(V
CC
1 = V
CC
2 = GND, V
EE
1 = V
EE
2 = 5.46 to 4.75V, Tc = 0 to +85°C, Rl = 25
to GND)
Application Circuit
Current Control Application
V
CLK
I
BIAS
: I
BIASADJ
10 : 1
I
Q
: I
DRVADJ
9 : 1
V
EE
= 5.2V
NC
LDOFF
V
EE
NC
V
CC
2
NC
BIASADJ
NC
NC
NC
NC
NC
V
EE
2
SBIAS
D
DRIVADJ
V
BB
P
P
D
V
CC
1
V
EE
1
0.01µF
0.01µF
V
IN
ECL Level
Single Input
V
SHUT
TTL Level
Input
L : Shut down
Open High
200
I
P
I
DRIVADJ
V
EE
= 5.2V
5.1
I
BIASADJ
V
EE
= 5.2V
0.1µH
I
Q
Laser
Diode
I
BIAS
BIASA
SDRIV
BIASB
Q
Q
V
EE
2
Q
Q
ECL Level
Single Input
CLK
CLK
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
22
23
24
25
26
27
28
29
30
31
32
1
MODULATION
GENERATOR
BIAS
GENERATOR
INPUT SIGNAL
MONITOR
VOLTAGE
SOURCE
D-FF
20
21
V
EE
= 5.2V
NRZ
20 to 80%
I
Q
= 60mA, I
BIAS
= 0
Max. Data rate
Max. FF Operating Frequency
Set Up Time
Hold Time
Shut Down Time
Rise time
Fall time
f
DMAX
f
FMAX
Ts
T
H
T
SHUT
T
TLH
T
THL
1.6
1.6
150
10
--
--
--
2.0
2.0
--
--
--
170
150
--
--
--
--
30
--
--
Gbps
GHz
ps
µs
ps
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
7
CXB1558Q-Y
Measurement Circuit (DC)
V
EE
= 5.2V
NC
NC
NC
NC
NC
NC
NC
0.01µF
V
IN
V
SHUT
200
I
P
I
DRVADJ
I
Q
I
BIAS
A
A
I
BIASADJ
0.01µF
CLKin
NC
LDOFF
CLK
CLK
V
CC
2
BIASADJ
V
EE
2
SBIAS
D
V
BB
P
P
D
V
CC
1
V
EE
1
DRIVADJ
BIASA
SDRIV
BIASB
Q
Q
V
EE
2
Q
Q
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
22
23
24
25
26
27
28
29
30
31
32
1
MODULATION
GENERATOR
BIAS
GENERATOR
INPUT SIGNAL
MONITOR
VOLTAGE
SOURCE
D-FF
20
21
V
EE
= 5.2V
V
EE
= 5.2V
V
EE
V
EE
= 5.2V
I
QB
A
V
EE
= 5.2V
NC
NC
NC
NC
NC
NC
NC
0.01µF
V
IN
V
SHUT
200
I
P
I
QM
I
Q
I
BIAS
A
A
I
BM
0.01µF
CLKin
NC
LDOFF
CLK
CLK
V
CC
2
BIASADJ
V
EE
2
SBIAS
D
V
BB
P
P
D
V
CC
1
V
EE
1
DRIVADJ
BIASA
SDRIV
BIASB
Q
Q
V
EE
2
Q
Q
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
22
23
24
25
26
27
28
29
30
31
32
1
MODULATION
GENERATOR
BIAS
GENERATOR
INPUT SIGNAL
MONITOR
VOLTAGE
SOURCE
D-FF
20
21
V
EE
= 5.2V
V
EE
= 5.2V
510
V
MOD
A
A
510
V
BIAS
V
EE
V
EE
= 5.2V
I
QB
A
8
CXB1558Q-Y
Measurement Circuit (AC)
CLKin
V
EE
= 5.2V
NC
NC
NC
NC
NC
NC
NC
NC
0.01µF
V
IN
V
SHUT
200
I
P
I
DRVADJ
0.01µF
51
51
Coaxial cable
50
50
Q Monitor
QB Monitor
Digitizing oscilloscope
LDOFF
CLK
CLK
V
CC
2
BIASADJ
V
EE
2
SBIAS
D
V
BB
P
P
D
V
CC
1
V
EE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
22
23
24
25
26
27
28
29
30
31
32
1
MODULATION
GENERATOR
BIAS
GENERATOR
INPUT SIGNAL
MONITOR
DRIVADJ
VOLTAGE
SOURCE
BIASA
SDRIV
BIASB
Q
Q
V
EE
2
Q
Q
D-FF
20
21
V
EE
= 5.2V
V
EE
= 5.2V
V
EE
V
EE
= 5.2V
9
CXB1558Q-Y
Voltage Control Application
I
BIAS
: I
BIASMONITOR
12 : 1
I
Q
: I
QMONITOR
11 : 1
V
EE
= 5.2V
NC
BIASA
SDRIV
LDOFF
CLK
BIASB
Q
Q
CLK
NC
V
CC
2
NC
V
EE
2
BIASADJ
NC
NC
NC
NC
NC
V
EE
2
SBIAS
D
DRIVADJ
V
BB
P
P
D
V
CC
1
V
EE
1
0.01µF
0.01µF
V
IN
ECL Level
Single Input
V
SHUT
TTL Level
Single Input
L: Shut down
Open High
200
I
P
I
QMONITOR
V
EE
= 5.2V
5.1
V
BIASADJ
0.1µH
I
Q
Laser
Diode
I
BIAS
Q
A
A
I
BIASMONITOR
V
EE
= 5.2V
510
V
DRIVADJ
510
Q
V
CLK
ECL Level
Single Input
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
22
23
24
25
26
27
28
29
30
31
32
1
MODULATION
GENERATOR
BIAS
GENERATOR
INPUT SIGNAL
MONITOR
VOLTAGE
SOURCE
D-FF
20
21
V
EE
V
EE
= 5.2V
Cautions for Handling
1. The outputs (Q, Q, BIASA, BIASB, SDRIV, SBIAS, P and P) on this IC are the open collector type.
Therefore, when these pins are not bing used, connect them to Vcc.
2. When the inputs (DRIVEADJ and BIASADJ) are not bing used, connect them to V
EE
.
3. Do not apply voltage over V
EE
+ 2.5V to DRIVADJ pin and BIASADJ pin.
4. In voltage control Application, do not apply voltage over the output voltage range to SDRIV pin and SBIAS
pin. (see DC Characteristics of Laser Part and Voltage Control Application Circuit.)
5. Maximum drive current of V
BB
pin is ±200µA.
6. Maximum input differential voltage is 2.5V. ( | D D | , | CLK CLK | )
7. As the electronic breakdown level is weak, take care to handle.
10
CXB1558Q-Y
Example of Representative Characteristics
Bias current vs. Bias control current
I
BIASADJ
Bias control current (mA)
I
BIAS
Bias current (mA)
I
BIAS
: I
BIASADJ
10 : 1
Bias current vs. Bias control voltage
V
BIAS
Bias control voltage [V]
I
BIAS
Bias current (mA)
I
BIAS
0.11
×
( V
BIAS
0.8 ) [A]
Modulation current vs. Modulation control voltage
V
DRVADJ
Modulation control voltage (V)
I
Q
Modulation current (mA)
0
2
1
0
20
40
60
80
100
0.5
1.5
I
Q
0.1
×
( Vmod
0.8 ) [A]
Modulation current vs. Modulation control current
0
2
4
6
8
10
0
20
40
60
80
100
I
DRIVADJ
Modulation control current (mA)
I
Q
Modulation current (mA)
I
Q
: I
DRIVADJ
9 : 1
0
2
4
6
8
10
0
20
40
60
80
100
0
2
1
0
20
40
60
80
100
0.5
1.5
11
CXB1558Q-Y
Package Outline
Unit: mm
SONY CODE
EIAJ CODE
JEDEC CODE
PACKAGE STRUCTURE
LEAD TREATMENT
LEAD MATERIAL
PACKAGE WEIGHT
TIN PLATING
42 ALLOY
32PIN QFP (CERAMIC)
14.73 ± 0.3
0.48 ± 0.1
1.016
1
8
9
16
17
24
25
32
4.92 MAX
0.15 ± 0.05
0.76
0° to 10°
10.63 MAX
(0.825)
0.635 ±
0.125
QFP-32C-L01
XQFP023-G-0000-A
CERAMIC
0.3g
PACKAGE MATERIAL
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