SDT4
70
DC Input
Optocoupler
The SDT4
70 consists of a phototransistor 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 SDT4
70 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 input-to-output isolation package
(2500 Vrms)
Low input power consumption
High stability
Ultra miniature 4-pin small outline package
CTR:
80%-600%
Registers, copiers, Automatic Vending Machines
System appliances, measuring instruments
Computer terminals, PLCs
Telecommunications, telephones
Home Appliances
Digital logic inputs
Microprocessor inputs
Switching power supply, laser beam printers, etc.
Tape and Reel
-TR
PARAMETER
UNIT
MIN
TYP
MAX
Storage Temperature
C
-55
125
Operating Temperature
C
-40
100
Input Forward Current
mA
50
Input Peak Forwad Current
A
1
Reverse Input Voltage
V
6
Output Power Dissipation
mW
1
20
1
2
4
3
+ Input
- Input
Collector
Emitter
UL and C-UL approved File #E201932
rev 1.0
Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
SDT4
70
DC Input
Optocoupler
ELECTRICAL CHARACTERISTICS - 25
PARAMETER
UNIT
MIN
TYP
MAX TEST CONDITIONS
INPUT SPECIFICATIONS
Forward Voltage
V
1.2
1.4
If =
5mA
Reverse Current
5
Vr =
5V
A
OUTPUT SPECIFICATIONS
Collector-Emitter Breakdown Voltage
V
80
Ic = 1uA
Emitter-Collector Breakdown Voltage
V
5
If = 100uA
Dark Current
0.1
Vce = 20V, IF=0
A
Floating Capacitance
p
0.6
1
V= 0V, f=1.0 MHz
F
Vce Saturation Voltage
V
0.1
0.3
If =
10mA, Ic = 1mA
Current Transfer Ratio
%
80
600
If = 5mA, Vce = 5V
Rise Time
3
Ic= 2mA, Vce =
5V, Rc = 100ohms
s
Fall Time
5
Ic= 2mA, Vce =
5V, Rc = 100 ohms
s
COUPLED SPECIFICATIONS
Isolation Voltage
V
2500
T = 1 minute
Isolation Resistance
G
50
rev 1.0
Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
Outside Dimension:Unit
(mm)
TOLERANCE :+ 0.2mm
SDT4
70
rev 1.0
Solid State Optronics, Inc.
1.888.377.4776
www.ssousa.com
Fig.1 Current Transfer Ratio vs.
Forward Current
Forward Current IF (mA)
Current transfer ratio CTR (%)
Fig.2 Collector Power Dissipation vs.
Ambient Temperature
Ambient Temperature Ta (C)
Collector Power Dissipation Pc (mW)
Fig.4 Forward Current vs. Ambient
Temperature
Ambient Temperature Ta (C)
Forward Current IF (mA)
Fig.5 Forward Current vs. Forward
Voltage
Forward Voltage VF (V)
Forward Current IF (mA)
Fig.7 Relative Current Transfer Ratio
vs. Ambient Temperature
Ambient Temperature Ta (C)
Relative Current T
ransfer Ratio (%)
Fig.8 Collector-emitter Saturation
Voltage vs. Ambient Temperature
Ambient Temperature Ta (C)
Collector-emitter Saturation V
oltage Vce (V)
Fig.10 Response Time vs. Load
Resistance
Load Resistance RL(K ohm)
Response Rise T
ime (us)
Fig.3 Collector Dark Current vs.
Ambient Temperature
Ambient Temperature Ta (C)
Collector Dark Current Iceo (A)
Fig.6 Collector Current vs. Collector-
emitter Voltage
Collector-emitter Voltage VCE (V)
Collector Current Ic (mA)
Fig.9 Collector-emitter Saturation
Voltage vs. Forward Current
Forward Current IF (mA)
Collector-emitter Saturation V
oltage Vce (V)
Fig.11 Response Time vs. Load
Resistance
Load Resistance RL(K ohm)
Response Rise T
ime (us)
Test circuit for switching time.
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