SDD451
DC Input
Optocoupler
The SDD451 consists of a photo Darlington transistor optically coupled to a light emitting diode. Optical coupling between the input LED
and output phototransistor allows for high isolation levels while maintaining low-level DC signal control capability. The SDD451 provides an
optically isolated method of controlling many interface applications such as telecommunications, industrial control and instrumentation
circuitry.
DESCRIPTION
FEATURES
APPLICATIONS
OPTIONS/SUFFIXES
SCHEMATIC DIAGRAM
MAXIMUM RATINGS
APPROVALS
High current transfer ratio
(CTR: MIN.600% at If=1mA, Vce=2V)
High input-to-output isolation package (
3750 Vrms)
4 Pin small outline package
System appliances, measuring instruments
Industrial robots
Copiers, automated vending machines
Signal transmission between varying circuits
Telephone sets
Fax machines
Interface with various power supply circuits
Numerical control machines
Tape and Reel
-TR
PARAMETER
UNIT
MIN
TYP
MAX
Storage Temperature
C
-40
125
Operating Temperature
C
-40
100
Continuous Input Current
mA
50
Transient Input Current
A
1
Reverse Input Control
Voltage
V
6
Output Power Dissipation
mW
170
UL and C-UL approved File#
E201932
rev 1.0
Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
52
1. Anode
2. Cathode
3. Emitter
4. Collector
SDD451
DC Input
Optocoupler
ELECTRICAL CHARACTERISTICS - 25
PARAMETER
UNIT
MIN
TYP
MAX TEST CONDITIONS
INPUT SPECIFICATIONS
LED Forward Voltage
V
1.2
1.4
If = 20mA
LED Reverse Current
10
VR=4V
A
OUTPUT SPECIFICATIONS
Collector-Emitter Breakdown Voltage
V
35
Emitter-Collector Voltage
V
5
Dark Current
1
Vce = 10V, If=0
A
Floating Capacitance
p
0.6
1
V= 0V, f=1.0MHz
F
Saturation Voltage
V
1
If = 20mA, Ic = 1mA
Current Transfer Ratio
%
600
7500
If = 1mA, Vce = 2V
Rise Time
60
Ic = 2mA, Vc
e = 2V, Rc = 100 ohms
s
Fall Time
5
0
Ic = 2mA, Vc
e = 2V, Rc = 100 ohms
s
COUPLED SPECIFICATIONS
Isolation Voltage
V
5000
T = 1 minute
Isolation Resistance
G
50
Cut off Frequency
k
7
Ic = 2mA, Vcc = 5V, Rc = 100 ohms
H z
rev 1.0
Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
SDD451
rev 1.0 Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
Fig.2 Collector Power Dissipation vs.
Ambient Temperature
Ambient Temperature Ta (C)
Diode power dissipation Pc (mW)
Fig.1 Forward Current vs. Ambient
Temperature
Ambient Temperature Ta (C)
Forward Current I
F
(mA)
Fig.3 Peak Forward Current vs. Duty
Ratio
Duty ratio
Peak forward Current I
FM
(mA)
Fig.5 Current Transfer Ratio vs.
Forward Current
Forward Current I
F
(mA)
Current transfer ratio CTR (%)
Fig.6 Collector Current vs. Collector-
emitter Voltage
Collector Current Ic (mA)
Collector current I
C
(mA)
Fig.8 Collector-emitter Saturation
Voltage vs. Ambient Temperature
Ambient Temperature Ta (C)
Collector-emitter saturation V
oltage V
CE
(SA
T) (V)
Fig.9 Collector Dark Current vs.
Ambient Temperature
Ambient Temperature Ta (C)
Collector dark current I
CEO
(A)
Fig.11 Collector-emitter Saturation
Voltage vs. Forward current
Ambient temperature Ta (C)
Collector-emitter saturation voltage V
CE
(sat) (V)
Fig.4 Forward Current vs. Forward
Voltage
Forward voltage V
F
(V)
Forward Current I
F
(mA)
Fig.7 Relative Current Transfer Ratio
vs. Ambient Temperature
Ambient Temperature Ta (C)
Relative current transfer ratio (%)
Fig.10 Response Time vs. Load
Resistance
Load resistance R
L
(K ohm)
Response T
ime (us)
MECHANICAL DIMENSIONS
4 PIN SMALL OUTLINE PACKAGE
rev 1.0
Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
END VIEW
TOP VIEW
BACK VIEW
.275" 0.015"
(6.985 0.4mm)
.80" 0.005"
(1.96 0.13mm)
.170" 0.010"
(4.165 0.3mm)
SDD451
DC Input
Optocoupler
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