VISHAY
LH1544AAC/ AACTR/ AB
Document Number 83835
Rev. 1.2, 08-Mar-04
Vishay Semiconductors
www.vishay.com
1
i179034
8765
123 4
S2'S2S1 S1'
S2'
S2
S1 S1'
DIP SMD
Dual 1 Form A Solid State Relay (Low Capacitance)
Features
Dual Channel, LH1541 Type
Low Capacitance Switch (5.0 pF)
Isolation Test Voltage 5300 VRMS
Extremely High OFF-resistance
Load Voltage 200 V
Linear, AC/DC Operation
Clean Bounce Free Switching
Low Power Consumption
High Reliability Monolithic detector
Agency Approvals
UL - File No. E52744
CSA - Certification 093751
BSI/BABT Cert. No. 7980
DIN EN 60747-5-5 (VDE 0884):2003-01 Available
with Option 1
FIMKO Approval
Applications
Instrumentation
- Thermocouple Switching
- Analog Multiplexing
Reed Relay Replacement
Programmable Logic Controllers
Data Acquisition
Test Equipment
Order Information
Description
These dual SSRs (LH1544, Dual 1 Form A) are SPST
normally open switches which can replace electrome-
chanical relays in many applications. The relays pro-
vide a low-capacitance, high-voltage switch contact
with high off-resistance and low switch-offset voltage.
These characteristics, combined with high-speed
actuation, result in an SSR which is ideal for small sig-
nal and dc instrumentation applications.
The relays are constructed by using a GaAlAs LED for
actuation control and an integrated monolithic die for
the switch output. The die is comprised of a photo-
diode array, switch-control circuity, and low-capaci-
tance MOSFET switches.
Part Remarks
LH1544AAC SMD-8, Tubes
LH1544AACTR SMD-8, Tape and Reel
LH1544AB DIP-8, Tubes
www.vishay.com
2
Document Number 83835
Rev. 1.2, 08-Mar-04
VISHAY
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
Absolute Maximum Ratings, Tamb = 25 °C
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
1) Breakdown occurs between the output pins external to the package
Electrical Characteristics, Tamb = 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.
Input
Output
Parameter Test condition Symbol Value Unit
LED continuous forward current IF50 mA
LED reverse voltage IR 10 µAV
R8.0 V
DC or peak AC load voltage IL 50 µAV
L200 V
Continuous DC load current -
one pole operating
IL55 mA
Continuous DC load current -
two pole operating
IL40 mA
Peak load current (single shot) t = 100 ms IP100 mA
Ambient temperature range Tamb - 40 to + 85 °C
Storage temperature range Tstg - 40 to + 150 °C
Pin soldering temperature t = 10 s max Tsld 260 °C
Input/output isolation voltage VISO 5300 VRMS
Pole-to-pole isolation voltage
(S1 to S2)1)
dry air, dust free, at sea level 1600 V
Output power dissipation
(continuous)
Pdiss 600 mW
Parameter Test condition Symbol Min Ty p. Max Unit
LED forward current,
switch turn-on
IL = 100 mA, t = 10 ms IFon 0.9 2.0 mA
LED forward current,
switch turn-off
VL = ± 300 V IFoff 0.2 0.8 mA
LED forward voltage IF = 5.0 mA VF1.10 1.19 1.45 V
Parameter Test condition Symbol Min Ty p. Max Unit
ON-resistance IF = 5.0 mA, IL = 50 mA RON 70 110 160
Off-resistance IF = 0 mA, VL = ± 100 V ROFF 0.5 10000 G
Off-state leakage current IF = 0 mA, VL = ± 100 V IO0.01 200 nA
IF = 0 mA, VL = ± 350 V IO1.0 µA
Output capacitance IF = 0 mA, VL = 1.0 V CO0pF
Output capacitance Pin 4 to 6 IF = 0 mA, VL = 50 V CO0.5 pF
Pole-to-pole Capacitance
(S1 to S2)
IF = 5.0 mA 0.5 pF
Switch offset IF = 5.0 mA VOS 0.1 V
VISHAY
LH1544AAC/ AACTR/ AB
Document Number 83835
Rev. 1.2, 08-Mar-04
Vishay Semiconductors
www.vishay.com
3
Transfer
Footnotes
The following information refers to the SSR Recommended Opera-
tion Conditions:
- Both relays on with equal load currents. For single relay operation,
refer to the LH1541 Recommended Operating Conditions graph.
Typical Characteristics (Tamb = 25 °C unless otherwise specified)
Parameter Test condition Symbol Min Typ. Max Unit
Capacitance (input-output) VISO = 1.0 V CIO 1.1 pF
Turn-on time IF = 5.0 mA, IL = 50 mA ton 0.13 0.25 ms
Turn-off time IF = 5.0 mA, IL = 50 mA toff 0.6 0.25 ms
Fig. 1 Recommended Operating Conditions
Fig. 2 LED Voltage vs. Temperature
ilh1544ab_00
30
40
50
0
20
10
-40 -20 0 20 40 60 80
Load Current (mA)
Ambient Temperature C)
IFon = 2.0 mA
IFon = 3.0 mA
IFon = 4.0 mA
IFon = 5.0 to 20 mA
ilh1544ab_01
Ambient Temperature, TAC)
LED Forward Voltage (V)
-40 -20 0 20 40 60 80
1.6
1.5
1.4
1.3
1.2
1.1
1.0
IF= 1.0 mA
IF=20mA
IF= 2.0 mA
IF= 5.0 mA
IF=10mA
IF=50mA
Fig. 3 LED Dropout Voltage vs. Temperature
Fig. 4 LED Current for Switch Turn-on vs. Temperature
ilh1544ab_02
-40 0 20
Ambient Temperature C)
1.20
1.15
1.10
0.95
1.00
40
1.05
8060-20
MIN.
TYP.
IL= 100 mA
LED Forward Voltage (V)
ilh1544ab_03
160
-60
150
120
90
-30
-40 -20 0 20 40 60 80
60
0
30
IL=50mA
Ambient Temperature C)
LED Forward Current for Switch
Turn-on (%), Normalized to 25 °C
www.vishay.com
4
Document Number 83835
Rev. 1.2, 08-Mar-04
VISHAY
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
Fig. 5 ON-Resistance vs. Temperature
Fig. 6 Switch Capacitance vs. Applied Voltage
Fig. 7 Insertion Loss vs. Frequency
ilh1544ab_04
-40
50
10
30
20
40
-20
-30
-10
-40
0
-20 0 20 40 60 80
Ambient Temperature C)
IL=50mA
Change in ON-resistance (%)
Normalized to 25 °C
ilh1544ab_05
01020
Applied Voltage (V)
6.0
5.0
0.0
30
4.0
10040
3.0
2.0
1.0
50 60 70 80 90
Capacitance (pF)
ilh1544ab_06
Frequency (Hz)
1.50
1.75
2.00
0
1.25
1.00
0.50
0.25
102103104105
0.75
RL= 600
Insertion Loss (dB)
Fig. 8 Output Isolation
Fig. 9 Leakage Current vs. Applied Voltage
Fig. 10 Leakage Current vs. Applied Voltage at Elevated
Temperatures
ilh1544ab_07
Frequency (Hz)
100
80
60
40
20
0
10 210 310 410 510 610 7
Isolation (dB)
VP=10V
RL=50
0 40 80 120 160 200
Load Voltage ( V )
17323
T = 25 qC
1
10
100
1000
0.1
Off–State Leakage Current ( nA )
0 40 80 120 160 200
Load Voltage ( V )
17324
T = 85 qC
T = 70 qC
T = 50 qC
1
10
100
1000
0.1
Off–State Leakage Current ( nA )
VISHAY
LH1544AAC/ AACTR/ AB
Document Number 83835
Rev. 1.2, 08-Mar-04
Vishay Semiconductors
www.vishay.com
5
Fig. 11 Switch Breakdown Voltage vs. Temperature
Fig. 12 Switch Offset Voltage vs. Temperature
Fig. 13 Switch Offset Voltage vs. LED Current
ilh1544ab_10
Ambient Temperature C)
-40 -20 0 20 40 60 80
8
4
-8
-10
-6
-4
-2
0
2
6
Change in Breakdown Voltage (%)
Normalized to 25 °C
ilh1544ab_11
20 40
Ambient Temperature C)
3.5
0
50 706030
3.0
1.5
2.0
2.5
0.5
1.0
80 90
IF= 5.0 mA
Switch Offset Voltage (µV)
ilh1544ab_12
010
LED Forward Current (mA)
0.6
0
15 25205
0.5
0.2
0.3
0.4
0.1
Switch Offset Voltage (µV)
Fig. 14 Turn-on Time vs. Temperature
Fig. 15 Turn-off Time vs. Temperature
Fig. 16 Turn-on Time vs. LED Current
ilh1544ab_13
-40 -20 0 20 40 60 80
Ambient Temperature C)
70
50
-20
-30
-10
-40
0
10
20
30
40
60 IF= 5.0 mA
IL=50mA
Change in Turn-on Time (%)
Normalized to 25 °C
ilh1544ab_14
120
40
-40 -20 0 20 40 60 80
-80
160
140
-40
100
80
60
20
-20
-60
0
Ambient Temperature C)
Change in Turn-off Time (%)
Normalized to 25 °C
IL=50mA
IF= 5.0 mA
ilh1544ab_15
0
0.5
1
1.5
2
01020304050
LED Current (mA)
T=8C
T=2C
T = -40 °C
IL=50mA
Turn-on Time (ms)
www.vishay.com
6
Document Number 83835
Rev. 1.2, 08-Mar-04
VISHAY
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
Package Dimensions in Inches (mm)
Fig. 17 Turn-off Time vs. LED Current
0.00
0.05
0.10
0.15
0.20
0.25
0 1020304050
LED Forward Current ( mA )
LH1541/44 Fig.18/17
T = 85 qC
Turn–Off Time ( ms )
T = 25 qC
T = –40 qC
I
F
= 5 mA
I
L
= 50 mA
i178008
pin one ID
.268 (6.81)
.255 (6.48)
.390 (9.91)
.379 (9.63)
.045 (1.14)
.030 (0.76)
typ.
.100 (2.54) typ.
10°
3°–9°
.300 (7.62)
typ.
.022 (.56)
.018 (.46) .012 (.30)
.008 (.20) .130 (3.30)
.110 (2.79)
.150 (3.81)
.130 (3.30)
.035 (.89)
.020 (.51)
.250 (6.35)
.230 (5.84)
4321
.031 (0.79)
.050 (1.27)
5678
DIP
ISO Method A
VISHAY
LH1544AAC/ AACTR/ AB
Document Number 83835
Rev. 1.2, 08-Mar-04
Vishay Semiconductors
www.vishay.com
7
Package Dimensions in Inches (mm)
i178009
Pin one I.D .
.390 (9.91)
.379 (9.63)
.045 (1.14)
.030 (0.78)
.040 (1.02)
.020 (.51)
typ. .008 (.25)
.004 (.10)
.150 (3.81)
.130 (3.30)
.100 (2.54)
typ.
.050
(1.27)
typ.
.312 (7.80)
.298 (7.52)
.315
(8.00)
typ.
.395 (10.03)
.375 (9.52)
.031 (.79)
typ.
.268 (6.81)
.255 (6.48)
Radius
.010
(2.54)
typ.
10°ˇ
3° to 7°ˇ
SMD
ISO Method A
.100 (2.54) R .010 (.25)
.070 (1.78)
.030 (.76)
.060 (1.52)
.315 (8.00) min
.435 (11.05)
www.vishay.com
8
Document Number 83835
Rev. 1.2, 08-Mar-04
VISHAY
LH1544AAC/ AACTR/ AB
Vishay Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and
operatingsystems with respect to their impact on the health and safety of our employees and the public, as
well as their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the
use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each
customer application by the customer. Should the buyer use Vishay Semiconductors products for any
unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all
claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal
damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423