The LH1539 telecom switch consists of an optically isolated
solid state relay (SSR) form A and a bidirectional input
optocoupler in a single 8-pin package. The SSR is ideal for
switch hook and dial-pulse switching while the optocoupler
performs ring detect and loop current sensing functions.
Both the SSR and optocoupler provide 5300 V
RMS
of
input-to-output isolation voltage.
The SSR is integrated on a monolithic receptor die using
smart power technology. The SSR features low On
resistance, high breakdown voltage, and current-limit
circuitry that protects the relay from telephone line induced
lightning surges.
The optocoupler provides bidirectional current sensing via
two anti parallel GaAs infrared emitting diodes. Very high
current transfer ratio (CTR) is achieved by coupling to a
photodarlington transistor. This high CTR allows the user to
minimize the size of the ring detector capacitor.
APPLICATIONS
• General telecom switching
- On/off hook switching
- Dial pulse
- Ring current detection
- Loop current sensing
AGENCY APPROVALS
file no. E52744 system code H, double
protection
CSA:
certification no. 093751
BSI/BABT: certification no. 7980
UL1577:
ORDERING INFORMATION
L
H
1
5
3
9
A
ELECTR.
VARIATION
#
#
T
R
DIP
SMD
PART NUMBER
PACKAGE
CONFIG.
TAPE AND
REEL
UL, CSA, BSI
LH1539AAC
7.62 mm
> 0.1 mm
PACKAGE
SMD-8, gullwing, tubes
SMD-8, gullwing, tape and reel
DIP-8, tubes
LH1539AACTR
LH1539AB
Document Number: 83832
Rev. 1.4, 11-Mar-11
For technical questions, contact:
optocoupleranswers@vishay.com
www.vishay.com
1
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1539AAC, LH1539AACTR, LH1539AB
Vishay Semiconductors
1 Form A Photo Darlington Telecom
Switch
ABSOLUTE MAXIMUM RATINGS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
SSR
INPUT
LED continuous forward current
LED reverse voltage
OUTPUT
DC or peak AC load voltage
Continuous DC load current
SSR
Ambient operating temperature range
Storage temperature range
Pin soldering temperature
(1)
Input to output isolation voltage
Package power dissipation (continuous)
OPTOCOUPLER
INPUT
LED continuous forward current
LED reverse voltage
OUTPUT
Collector emitter breakdown voltage
Phototransistor power dissipation
Notes
•
(1)
TEST CONDITION
SYMBOL
VALUE
UNIT
I
R
10 μA
I
L
50 μA
I
F
V
R
V
L
I
L
T
amb
T
stg
T
sld
V
ISO
P
diss
50
8
400
120
- 40 to + 85
- 40 to + 85
260
5300
600
mA
V
V
mA
°C
°C
°C
V
RMS
mW
t = 10 s max.
t = 60 s min.
I
R
10 μA
I
F
V
R
BV
CEO
P
diss
50
3
30
150
mA
V
V
mW
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. Functional operation of the device is not implied at these or
any other conditions in excess of those given in the operational sections of this document. Exposure to absolute maximum ratings for extended periods of the
time can adversely affect reliability.
Refer to reflow profile for soldering conditions for surface mounted devices (SMD). Refer to wave profile for soldering conditions for through hole devices (DIP).
ELECTRICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
INPUT
LED forward current, switch turn-on
LED forward current, switch turn-off
LED forward voltage
OUTPUT
On-resistance
Off-resistance
Current limit
Off-state leakage current
Capacitance pin 4 to pin 6
TRANSFER
Optocoupler
LED forward voltage
DC current transfer ratio
Saturation voltage
Collector emitter leakage current
Note
•
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are the result of engineering evaluations. Typical
values are for information only and are not part of the testing requirements.
TEST CONDITION
I
L
= 100 mA, t = 10 ms
V
L
= ± 300 V
I
F
= 3 mA
I
F
= 3 mA, I
L
= ± 50 mA
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 5 mA, t = 5 ms
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 0 mA, V
L
= 1 V
I
F
= 0 mA, V
L
= 50 V
SYMBOL
I
Fon
I
Foff
V
F
R
ON
R
OFF
I
LMT
I
O
C
O
C
O
MIN.
TYP.
0.5
0.4
1.2
25
5000
210
0.04
55
10
MAX.
1
1.4
33
270
100
UNIT
mA
mA
V
G
mA
nA
pF
pF
0.1
0.8
17
170
I
F
= 10 mA
I
F
= 0.05 mA, V
CE
= 0.9 V
I
F
= 0.05 mA, I
C
= 0.15 mA
I
F
= 0 mA, V
CE
= 5 V
V
F
CTR
DC
V
CEsat
I
CEO
0.9
300
1.2
1.5
1
N/A
V
%
V
SWITCHING CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Turn-on time
Turn-off time
TEST CONDITION
I
F
= 5 mA, I
L
= 50 mA
I
F
= 5 mA, I
L
= 50 mA
SYMBOL
t
on
t
off
MIN.
TYP.
MAX.
2
0.5
UNIT
ms
ms
RECOMMENDED OPERATING CONDITIONS
PARAMETER
LED forward current, switch turn-on
www.vishay.com
2
TEST CONDITION
T
amb
= - 40 °C to + 85 °C
SYMBOL
I
Fon
MIN.
3
TYP.
MAX.
20
UNIT
mA
For technical questions, contact:
optocoupleranswers@vishay.com
Document Number: 83832
Rev. 1.4, 11-Mar-11
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1539AAC, LH1539AACTR, LH1539AB
1 Form A Photo Darlington Telecom
Vishay Semiconductors
Switch
TYPICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
1.6
1.20
LED Forward Voltage (V)
1.5
1.4
1.3
1.2
1.1
1.0
- 40
ilh1539ab_01
LED Forward Voltage (V)
I
F
= 50 mA
I
F
= 20 mA
1.10
1.00
0.90
0.80
0.70
- 40
I
F
= 1.0 mA
I
F
= 2.0 mA
I
F
= 5.0 mA
I
F
= 10 mA
0
20
40
60
80
- 20
- 20
0
20
40
60
80
Ambient Temperature, T
A
(°C)
ilh1539ab_04
Ambient Temperature, T
A
(°C)
Fig. 1 - LED Voltage vs. Temperature
Fig. 4 - LED Dropout Voltage vs. Temperature
LED Forward Current for Switch
Turn-on/off (%) Norm. to 25 °C
40
Change in Current Limit (%)
Normalized to 25 °C
300
I
L
= 100 mA
200
30
20
10
0
- 10
- 20
- 30
- 40
- 40
- 20
0
I
F
= 5.0 mA, t = 5 ms
100
0
- 100
- 40
- 20
0
20
40
60
80
20
40
60
80
ilh1539ab_02
Ambient Temperature, T
A
(°C)
ilh1539ab_05
Ambient Temperature, T
A
(°C)
Fig. 2 - LED Current for Switch Turn-on/off vs. Temperature
Fig. 5 - Current Limit vs. Temperature
50
AC/DC On-resistance Variation (%)
Normalized to Datasheet
R
on
Specification at I
F
= 5 mA
0
20
40
60
80
Change in On-resistance (%)
Normalized to 25 °C
40
30
20
10
0
- 10
- 20
- 30
I
L
= 50 mA
9
8
7
6
5
4
3
2
1
0
0.0
1.0
2.0
3.0
4.0
5.0
- 40
- 40
ilh1539ab_03
- 20
Ambient Temperature, T
A
(°C)
ilh1539ab_06
LED Forward Current (mA)
Fig. 3 - On-Resistance vs. Temperature
Fig. 6 - Variation in On-Resistance vs. LED Current
Document Number: 83832
Rev. 1.4, 11-Mar-11
For technical questions, contact:
optocoupleranswers@vishay.com
www.vishay.com
3
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1539AAC, LH1539AACTR, LH1539AB
Vishay Semiconductors
1 Form A Photo Darlington Telecom
Switch
70
60
50
40
30
20
10
0
0
ilh1539ab_07
0.6
0.5
R
L
= 600
Ω
Insertion Loss (dB)
Capacitance (pF)
0.4
0.3
0.2
0.1
0.0
20
40
60
80
100
10
2
ilh1539ab_10
10
3
10
4
10
5
Applied Voltage (V)
Fig. 7 - Output Isolation
Frequency (Hz)
Fig. 10 - Insertion Loss vs. Frequency
100
100
Off-state Leakage Current (pA)
80
V
P
= 10 V
R
L
= 50
Ω
90
80
70
60
50
40
30
20
10
0
0
50
100 150 200 250 300 350 400
I
F
= 0 mA
Isolation (dB)
60
40
20
0
10
2
ilh1539ab_08
10
3
10
4
10
5
10
6
10
7
Frequency (Hz)
Fig. 8 - Output Isolation
ilh1539ab_11
Load Voltage (V)
Fig. 11 - Leakage Current vs. Applied Voltage
3.5
Change in Breakdown Voltage (%)
Normalized to 25 °C
8
6
4
2
0
-2
-4
-6
-8
- 40
- 20
0
20
40
60
80
Off-state Leakage Current (nA)
3.0
85 °C
2.5
2.0
1.5
1.0
0.5
0.0
0
ilh1539ab_09
70 °C
50 °C
50
100 150 200 250 300 350 400
Load Voltage (V)
ilh1539ab_12
Ambient Temperature, T
A
(°C)
Fig. 9 - Leakage Current vs.
Applied Voltage at Elevated Temperatures
Fig. 12 - Switch Breakdown Voltage vs. Temperature
www.vishay.com
4
For technical questions, contact:
optocoupleranswers@vishay.com
Document Number: 83832
Rev. 1.4, 11-Mar-11
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1539AAC, LH1539AACTR, LH1539AB
1 Form A Photo Darlington Telecom
Vishay Semiconductors
Switch
PACKAGE DIMENSIONS
in millimeters
DIP
pin one ID
4
6.81
6.48
5
6
7
8
ISO method A
3
2
1
9.91
9.63
1.14
0.76
4° typ.
3.81
3.30
1.27
0.56
0.46
2.54 typ.
i178008
7.62 typ.
0.79
10°
0.89
0.51
3° to 9°
0.30
0.20
6.35
5.84
3.30
2.79
SMD
pin one ID
6.81
6.48
2.54
0.76
R 0.25
1.78
9.91
9.63
8 min.
11.05
10.03
9.52
radius
7.80
7.52
1.52
0.79 typ.
ISO method A
1.14
0.78
3.81
3.30
3° to 7°
4°
typ.
1.27 typ.
i178009
0.25
0.10
1.02
0.51
10°
8 typ.
0.3 typ.
2.54 typ.
PACKAGE MARKING
(example)
LH1539
V YWW H 68
Note
• Tape and reel suffix (TR) is not part of the package marking.
Document Number: 83832
Rev. 1.4, 11-Mar-11
For technical questions, contact:
optocoupleranswers@vishay.com
www.vishay.com
5
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
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