VISHAY
LH1539AAC/ AACTR/ AB
Vishay Semiconductors
1 Form A Photo Darlington Telecomswitch
DIP
SMD
Features
• Solid State Relay and Autopolarity Optocoupler in
One 8-pin Package
• Isolation Test Voltage, 5300 V
RMS
• Surface Mountable
• Optocoupler
- Bidirectional Current Detection
- High CTR:
≥
300 %
• Solid State Relay
- Form A . LH1525 Type
- Low Operating Current
- Typical R
ON
: 25
Ω
- Load Voltage: 400 V
- Load Current: 120 mA
- Current-limit Protection
- Linear, ac/dc Operation
- Clean, Bounce-free Switching
- Low Power Consumption
8
7
6
5
1
i179055
2
3
4
Description
The LH1539 telecom switch consists of an optically
isolated solid state relay (SSR) Form A and a bidirec-
tional 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 iso-
lation 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 sens-
ing 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.
Agency Approvals
• UL - File No. E52744
• CSA - Certification 093751
• BSI/BABT Cert. No. 7980
Applications
General Telecom Switching
- On/off-hook Switching
- Dial Pulse
- Ring Current Detection
- Loop Current Sensing
Order Information
Part
LH1539AAC
LH1539AACTR
LH1539AB
Remarks
Gullwing, Tubes, SMD-8
Gullwing, Tape and Reel, SMD-8
Tubes, DIP-8
Document Number 83832
Rev. 1.2, 26-Apr-04
www.vishay.com
1
LH1539AAC/ AACTR/ AB
Vishay Semiconductors
Absolute Maximum Ratings, T
amb
= 25 °C
VISHAY
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 time can adversely affect reliability.
SSR
Parameter
LED continuous forward current
LED reverse voltage
DC or peak AC load voltage
Continuous DC load current
Ambient operating temperature
range
Storage temperature range
Pin soldering temperature
Input/output isolation voltage
Package power dissipation
t = 10 s max
t = 60 s min
I
R
≤
10
µA
I
L
≤
50
µA
Test condition
Symbol
I
F
V
R
V
L
I
L
T
A
T
stg
T
sld
V
ISO
P
diss
Value
50
8.0
400
120
- 40 to + 85
- 40 to + 85
260
5300
600
Unit
mA
V
V
mA
°C
°C
°C
V
RMS
mW
Optocoupler
Parameter
LED continuous forward current
LED reverse voltage
Collector-emitter breakdown
voltage
Phototransistor power
dissipation
I
R
≤
10
µA
Test condition
Symbol
I
F
V
R
BV
CEO
P
diss
Value
50
3.0
30
150
Unit
mA
V
V
mW
Electrical Characteristics, T
amb
= 25 °C
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.
SSR
Parameter
LED forward current for switch
turn-on
LED forward current for switch
turn-off
LED forward voltage
ON-Resistance
OFF-Resistance
Current limit
Test condition
I
L
= 100 mA, t = 10 ms
V
L
= ± 300 V
I
F
= 3.0 mA
I
F
= 3.0 mA, I
L
= ± 50 mA
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 5.0 mA, t = 5.0 ms
Symbol
I
Fon
I
Foff
V
F
R
ON
R
OFF
I
LMT
I
O
C
O
C
O
t
on
t
off
170
0.1
0.8
17
Min
Typ.
0.5
0.4
1.2
25
5000
210
0.04
55
10
2.0
0.5
270
100
1.4
33
Max
1.0
Unit
mA
mA
V
Ω
GΩ
mA
nA
pF
pF
ms
ms
Output off-state leakage current I
F
= 0 mA, V
L
= ± 100 V
Output capacitance pin
I
F
= 0 mA, V
L
= 1.0 V
4 to pin 6
I
F
= 0 mA, V
L
= 50 V
Turn-on time
Turn-off time
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 5.0 mA, I
L
= 50 mA
www.vishay.com
2
Document Number 83832
Rev. 1.2, 26-Apr-04
VISHAY
Optocoupler
Parameter
LED forward voltage
DC Current Transfer Ratio
Saturation voltage
Collector-emitter leakage
current
Test condition
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
= 5.0 V
LH1539AAC/ AACTR/ AB
Vishay Semiconductors
Symbol
V
F
CTR
DC
V
CEsat
I
CEO
Min
0.9
300
Typ.
1.2
Max
1.5
1.0
N/A
Unit
V
%
V
Recommended Operating Conditions
Parameter
LED forward current for switch
turn-on
Test condition
T
A
= - 40 °C to + 85 °C
Symbol
I
Fon
Min
3.0
Typ.
Max
20
Unit
mA
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
1.6
Change in ON-Resistance (%)
Normalzed to 25 °C
50
40
IL = 50 mA
LED Forward Voltage (V)
1.5
1.4
1.3
1.2
1.1
IF = 1.0 mA
IF = 2.0 mA
IF = 5.0 mA
IF = 10 mA
IF = 20 mA
IF = 50 mA
30
20
10
0
-10
-20
-30
-40
-40
-20
0
20
40
60
80
1.0
-40
ilh1539ab_01
-20
0
20
40
60
80
Ambient Temperature, TA (°C)
ilh1539ab_03
Ambient Temperature, TA (°C)
Fig. 1 LED Voltage vs. Temperature
Fig. 3 ON-Resistance vs. Temperature
LED Forward Current for Switch
Turn-ON/OFF (%) Normalized to 25 °C
300
IL = 100 mA
200
LED Forward Voltage (V)
1.20
1.10
1.00
0.90
0.80
0.70
-40
ilh1539ab_04
100
0
-100
-40
-20
0
20
40
60
80
-20
0
20
40
60
80
ilh1539ab_02
Ambient Temperature, TA (°C)
Ambient Temperature, TA (°C)
Fig. 2 LED Current for Switch Turn-on/off vs. Temperature
Fig. 4 LED Dropout Voltage vs. Temperature
Document Number 83832
Rev. 1.2, 26-Apr-04
www.vishay.com
3
LH1539AAC/ AACTR/ AB
Vishay Semiconductors
VISHAY
40
Change in Current Limit (%)
Normalized to 25 °C
100
IF = 5 mA, t = 5 ms
80
60
40
20
0
-20
0
20
40
60
80
ilh1539ab_08
30
20
VP = 10 V
RL = 50
Ω
0
-10
-20
-30
-40
-40
Isolation (dB)
10
10 2
10 3
10 4
10 5
10 6
10 7
ilh1539ab_05
Ambient Temperature, TA (°C)
Frequency (Hz)
Fig. 5 Current Limit vs. Temperature
Fig. 8 Output Isolation
9
ac/dc ON-Resistance Variation (%)
Normalized to Data Sheet
RON Specification @ IF = 5 mA
OFF-State Leakage Current (nA)
3.5
3.0
85 °C
2.5
2.0
1.5
1.0
0.5
0.0
1.0
2.0
3.0
4.0
5.0
ilh1539ab_09
8
7
6
5
4
3
2
1
0
0.0
70 °C
50 °C
0
50
100 150
200
250
300
350
400
ilh1539ab_06
LED Forward Current (mA)
Load Voltage (V)
Fig. 6 Variation in ON-Resistance vs. LED Current
Fig. 9 Leakage Current vs. Applied Voltage at Elevated
Temperatures
70
60
50
Capacitnce (pF)
Insertion Loss (dB)
0.6
0.5
0.4
0.3
0.2
0.1
RL = 600
Ω
40
30
20
10
0
0
20
40
60
80
100
Applied Voltage (V)
0.0
10 2
ilh1539ab_10
10 3
10 4
10 5
ilh1539ab_07
Frequency (Hz)
Fig. 7 Output Isolation
Fig. 10 Insertion Loss vs. Frequency
www.vishay.com
4
Document Number 83832
Rev. 1.2, 26-Apr-04
VISHAY
LH1539AAC/ AACTR/ AB
Vishay Semiconductors
100
OFF-State Leakage Current (pA)
Change in Breakdown Voltage (%)
Normalized to 25 °C
8
IF = 0 mA
6
4
2
0
-2
-4
-6
-8
-40
-20
0
20
40
60
Ambient Temperature, TA (°C)
80
90
80
70
60
50
40
30
20
10
0
0
50
100
150 200
250
300 350
400
ilh1539ab_11
Load Voltage (V)
ilh1539ab_12
Fig. 11 Leakage Current vs. Applied Voltage
Fig. 12 Switch Breakdown Voltage vs. Temperature
Package Dimensions in Inches (mm)
DIP
4
.268 (6.81)
.255 (6.48)
5
6
7
8
ISO Method A
pin one ID
3
2
1
.390 (9.91)
.379 (9.63)
.045 (1.14)
.030 (0.76)
4° typ.
.031 (0.79)
.150 (3.81)
.130 (3.30)
.050 (1.27)
.022 (.56)
.018 (.46)
i178008
.300 (7.62)
typ.
10°
.035 (.89)
.020 (.51)
.100 (2.54) typ.
3°–9°
.012 (.30)
.008 (.20)
.250 (6.35)
.230 (5.84)
.130 (3.30)
.110 (2.79)
Document Number 83832
Rev. 1.2, 26-Apr-04
www.vishay.com
5
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