6N138, 6N139
Low Input Current Photodarlington Coupler
Features
•
•
•
Low current – 0.5mA
Superior CTR-2000%
CTR guaranteed 0–70°
C
Description
The 6N138 & 6N139 optocouplers consist of an
AlGaAs LED optically coupled to a high gain split
darlington photodetector.
The combination of a very low input current of
Applications
•
•
•
•
•
•
Digital logic ground isolation
Telephone ring detector
EIA-RS-232C line receiver
High common mode noise line receiver
P bus isolation
0.5mA and a high current transfer ratio of 2000%
makes this family particularly useful for input
interface to MOS, CMOS, LSTTL and EIA RS232C,
while output compatibility is ensured to CMOS as
well as high fan-out TTL requirements.
The devices are packaged in an 8-pin DIP package
and also available in gullwing (400mil) spacing and
surface mount lead forming option.
Note: Different lead forming options available. See package
dimension.
CT Micro
Proprietary & Confidential
μ
Current loop receiver
Package Outline
Schematic
Page 1
Rev 1
Aug, 2013
6N138, 6N139
Low Input Current Photodarlington Coupler
Absolute Maximum Rating at 25
o
C
Symbol
V
ISO
T
OPR
T
STG
T
SOL
Isolation voltage
Operating temperature
Storage temperature
Soldering temperature
Parameters
Ratings
5000
-55 ~ +100
-55 ~ +125
260
Units
V
RMS
o
C
o
C
o
C
Notes
Emitter
I
F
I
FP
I
F(TRANS)
V
R
P
D
Forward current
Peak forward current (50% duty, 1ms P.W)
Peak transient current
Reverse voltage
Power dissipation
(≤1µs P.W,300pps)
25
50
1
5
40
mA
mA
A
V
mW
Detector
P
D
V
EBR
I
O
V
O
Power dissipation
Emitter-Base reverse voltage
Output Current
6N138
Output voltage
6N139
6N138
-0.5 to 18
-0.5 to 7
-0.5 to 18
V
V
V
100
0.5
60
-0.5 to 7
mW
V
mA
V
V
CC
Supply voltage
6N139
CT Micro
Proprietary & Confidential
Page 2
Rev 1
Aug, 2013
6N138, 6N139
Low Input Current Photodarlington Coupler
Electrical Characteristics
T
Emitter Characteristics
Symbol
V
F
I
R
V
F
/ T
A
Parameters
Forward voltage
Reverse Current
A
= 0 - 70° V
CC
=4.5V (unless otherwise specified).
C,
Test Conditions
I
F
= 16mA
V
R
= 5V
I
F
=16mA
Min
-
-
-
Typ
1.45
-
-1.8
Max
1.6
5
-
Units
V
µA
mV/°
C
Notes
Temperature coefficient of forward
voltage
Detector Characteristics
Symbol
I
OH
Parameters
Logic High Output
Current
6N139
I
F
=0mA, V
O
=V
CC
=18V,
6N138
I
F
=1.6mA, V
O
=Open,
Logic Low Supply Current
V
CC
=18V
I
F
=0mA, V
O
=Open,
Logic High Supply Current
V
CC
=18V
-
0.04
8
µA
-
0.5
1.4
mA
-
-
200
Test Conditions
Min
-
Typ
0.008
Max
80
Units
µA
Notes
I
CCL
I
CCH
Transfer Characteristics
Symbol
Parameters
6N139
Current Transfer
6N138
Ratio
6N139
I
F
= 0.5mA, I
O
= 2mA
I
F
= 1.6mA, I
O
= 8mA
Logic Low Output
Voltage
I
F
= 12mA, I
O
= 24mA
6N138
I
F
= 1.6mA, I
O
= 4.8mA
-
-
0.16
0.05
0.4
0.4
6N139
I
F
= 5mA, I
O
= 15mA
-
0.11
0.4
V
I
F
=1.6mA, V
O
=0.5V,
500
-
-
2000
0.04
0.08
-
0.4
0.4
300
2000
-
%
Test Conditions
I
F
=0.5mA, V
O
=0.4V,
Min
400
Typ
2500
Max
-
Units
Notes
CTR
V
OL
CT Micro
Proprietary & Confidential
Page 3
Rev 1
Aug, 2013
6N138, 6N139
Low Input Current Photodarlington Coupler
Electrical Characteristics
T
Switching Characteristics
Symbol
Parameters
A
= 0 - 70° V
CC
= 5V (unless otherwise specified).
C,
Test Conditions
I
F
= 0.5mA,
Min
-
Typ
-
4.8
-
0.2
-
1.35
-
15
-
1.6
-
7.6
-
Max
30
25
2
Units
Notes
6N139
I
F
= 1.6mA,
6N138
I
F
= 0.5mA,
R
L
= 4.7k
6N139
I
F
= 1.6mA,
6N138
Common Mode Transient
Immunity at Logic High
Common Mode Transient
Immunity at Logic Low
CM
H
I
F
= 0mA, |VCM| = 10V
P-P
,
1,000
T
A
= 25°
C,R
L
= 2.2k
V/µs
I
F
= 1.6mA, |VCM| = 10V
P-P
,
1,000
T
A
= 25°
C,R
L
= 2.2k
-
-
-
CM
L
CT Micro
Proprietary & Confidential
Ω
R
L
= 2.2k
Ω
T
PLH
Low to High
Propagation Delay
I
F
= 12mA,
R
L
= 250
Ω
R
L
= 2.2k
Ω
Ω
T
PHL
High to Low
Propagation Delay
I
F
= 12mA,
R
L
= 250
Ω
R
L
= 4.7k
T
A
= 25
0
C
-
-
T
A
= 25
0
C
µs
-
-
1
15
10
90
60
10
µs
-
-
7
50
35
T
A
= 25
0
C
-
-
T
A
= 25
0
C
-
-
T
A
= 25
0
C
T
A
= 25
0
C
-
Page 4
Rev 1
Aug, 2013
6N138, 6N139
Low Input Current Photodarlington Coupler
Typical Characteristic Curves
CT Micro
Proprietary & Confidential
Page 5
Rev 1
Aug, 2013
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