LH1526AB/AAC/AACTR
Dual 1 Form A
Solid-State Relays
FEATURES
• Dual Channel Form A
• Extremely Low Operating Current
• High-speed Operation
• 5300 V
RMS
I/O Isolation
• Current-limit Protection
• High Surge Capability
• Linear, ac/dc Operation
• dc-only Option
• Clean, Bounce-free Switching
• Low Power Consumption
• High-reliability Monolithic Receptor
• Surface-mountable
AGENCY APPROVALS
• UL – File No. E52744
• CSA – Certification 093751
• BSI/BABT Cert. No. 7980
APPLICATIONS
• General Telecom Switching
– Telephone Line Interface
– On/off Hook
– Ring Relay
– Break Switch
– Ground Start
• Battery-powered Switch Applications
• Industrial Controls
– Microprocessor Control of Solenoids,
Lights, Motors, Heaters, etc.
• Programmable Controllers
• Instrumentation
• See Application Note 56
DESCRIPTION
The LH1526 relay is two SPST normally open switches
that can replace electromechanical relays in many
applications. The relays require a minimal amount of
LED drive current to operate, making it ideal for battery-
powered and power consumption sensitive applica-
tions. The relay is constructed using a GaAIAs LED for
actuation control and an integrated monolithic die for
the switch output. The die, fabricated in a high-voltage
dielectrically isolated technology, comprised of a photo-
diode array, switch-control circuitry, and MOSFET
switches. In addition, the relay employs current-limiting
circuitry, enabling it to pass FCC 68.302 and other regu-
latory surge requirements when overvoltage protection
is provided. The relay can be configured for ac/dc or
dc-only operation.
Package Dimensions in Inches (mm)
DIP
pin one ID
S1
S1' S2
7
6
S2'
5
S1
S1'
4
.268 (6.81)
.255 (6.48)
5
3
2
1
8
6
7
8
1
2
3
4
S2
S2'
.390 (9.91)
.379 (9.63)
.045 (1.14)
.030 (0.76)
4° typ.
.150 (3.81)
.130 (3.30)
.050 (1.27)
.022 (.56)
.018 (.46)
.035 (.89)
.020 (.51)
.100 (2.54) typ.
.031 (0.79)
.300 (7.62)
typ.
10°
3°–9°
.012 (.30)
.008 (.20)
.250 (6.35)
.230 (5.84)
.130 (3.30)
.110 (2.79)
SMD
Pin one I.D.
.268 (6.81)
.255 (6.48)
.390 (9.91)
.379 (9.63)
.031 (.79)
typ.
.150 (3.81)
.130 (3.30)
.395 (10.03)
.375 (9.52)
.312 (7.80)
.298 (7.52)
.045 (1.14)
.030 (0.78)
Radius
3
°
to 7
°
4°
typ.
.050
(1.27)
typ.
.008 (.25)
.004 (.10) .040 (1.02)
.020 (.51)
.100 (2.54)
typ.
10°
.315
(8.00)
typ.
.010
(2.54)
typ.
Part Identification
Part Number
LH1526AB
LH1526AAC
LH1526AACTR
Description
8-pin DIP, Tubes
8-pin SMD, Tubes
8-pin SMD, Tape and Reel
Document Number: 83825
Revision 17-August-01
www.vishay.com
3–114
Recommended Operating Conditions
120
100
LOAD CURRENT (mA)
80
60
40
20
I
F
= 0.3 mA
I
F
= 1.0 mA
I
F
= 1.5 mA
I
F
= 2.0 mA
I
F
= 2.25 mA
TO 20 mA
–20
0
20
40
60
80
Absolute Maximum Ratings,
T
A
=25
°
C (except where noted)
Stresses in excess of the absolute Maximum Ratings can cause permanent
damage to the device. These are absolute stress ratings only. Functional opera-
tion 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.
0
–40
AMBIENT TEMPERATURE, T
A
(°C)
Ambient Operating Temperature Range,
T
A
................... –40
°
to +85
°
C
Storage Temperature Range,
T
stg
................................. –40
°
to +150
°
C
Pin Soldering Temperature, t=10 s max,
T
S
................................ 260
°
C
Input/Output Isolation Voltage, t=1.0 s,
V
ISO
........................5300 V
RMS
LED Input Ratings:
Continuous Forward Current,
I
F
...............................................50 mA
Reverse Voltage,
V
R
................................................................... 8.0 V
Output Operation (each channel)
dc or Peak ac Load Voltage,
I
L
≤
50
µ
A,
V
L
................................. 400 V
Continuous dc Load Current,
I
L
Unidirectional Operation
Pins 4, 6 (+) to Pin 5 (–)..........................................................250 mA
Two Pole Operation,
I
L
..............................................................100 mA
Power Dissipation,
P
DISS
......................................................... 600 mW
Electrical Characteristics,
T
A
=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 purposes only and are not part of the testing requirements.
Parameter
Input
LED Forward Current for Switch Turn-on
LED Forward Current for Switch Turn-off
LED Forward Voltage
Output
ON-resistance:
ac/dc, each pole
OFF-resistance
Current Limit
Output Off-state Leakage Current
Output Capacitance
Switch Offset
Transfer
Input/Output Capacitance
Turn-on Time
Turn-off Time
Symbol
Min.
Typ.
Max.
Unit
Test Condition
I
F
on
I
F
off
V
F
R
ON
R
OFF
I
LMT
—
—
—
—
0.01
0.80
0.3
0.1
1.15
0.5
—
1.40
mA
mA
V
I
L
=100 mA, t=10 ms
V
L
=±350 V, t=100 ms
I
F
=1.5 mA
17
—
170
—
—
—
—
—
25
5000
210
0.04
—
37
13
0.25
36
—
270
200
1.0
—
—
—
Ω
G
Ω
mA
nA
µ
A
pF
pF
µ
V
I
F
=1.5 mA,
I
L
=±50 mA
I
F
=0 mA,
V
L
=±100 V
I
F
=1.5 mA, t=5.0 ms
V
L
=7.0 V
I
F
=0 mA,
V
L
=±100 V
I
F
=0 mA,
V
L
=±400 V
I
F
=0 mA,
V
L
=1.0 V
I
F
=0 mA,
V
L
=50 V
I
F
=5.0 mA
V
ISO
=1.0 V
I
F
=1.5 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=50 mA
I
F
=1.5 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=50 mA
C
ISO
t
on
t
off
—
—
—
—
—
0.8
1.00
0.5
0.20
0.4
—
—
1.0
—
0.9
pF
ms
ms
ms
ms
Document Number: 83825
Revision 17-August-01
www.vishay.com
3–115
Typical Performance Characteristics
Figure 1. LED Voltage vs. Temperature
1.6
1.5
1.4
1.3
1.2
1.1
I
F
= 1 mA
I
F
= 2 mA
I
F
= 5 mA
I
F
= 10 mA
–20
0
20
40
60
AMBIENT TEMPERATURE, T
A
(°C)
80
I
F
= 20 mA
LED FORWARD VOLTAGE (V)
Figure 4. LED Dropout Voltage vs. Temperature
1.20
LED FORWAD VOLTAGE (V)
I
F
= 50 mA
1.10
1.00
0.90
0.80
1.0
–40
0.70
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE, T
A
(°C)
Figure 2. LED Current for Switch Turn-on/off vs.
Temperature
LED FORWARD CURRENT FOR SWITCH
TURN-0N/OFF (%) NORMALIZED TO 25
°C
300
Figure 5. Current Limit vs. Temperature
40
I
F
= 5 mA, t = 5 ms
CHANGE IN CURRENT LIMIT (%)
NORMALIZED TO 25
°C
I
L
= 100 mA
200
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
100
0
–100
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE, T
A
(°C)
AMBIENT TEMPERATURE, T
A
(°C)
Figure 3. ON-Resistance vs. Temperature
50
I
L
= 50 mA
40
CHANGE IN ON-RESISTANCE (%)
NORMALZED TO 25
°C
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
Figure 6. Variation in ON-Resistance vs. LED Current
ac/dc ON-RESISTANCE VARIATION (%)
NORMALIZED TO DATA SHEET
R
ON
SPECIFICATION @ I
F
= 5 mA
9
8
7
6
5
4
3
2
1
0
0.0
1.0
2.0
3.0
4.0
5.0
LED FORWARD CURRENT (mA)
AMBIENT TEMPERATURE, T
A
(°C)
Document Number: 83825
Revision 17-August-01
www.vishay.com
3–116
Figure 7. Switch Capacitance vs. Applied Voltage
70
60
50
40
30
20
10
0
0
20
40
60
80
100
APPLIED VOLTAGE (V)
Figure 10. Insertion Loss vs. Frequency
0.6
INSERTION LOSS (dB)
0.5
0.4
0.3
0.2
0.1
0.0
102
103
104
105
FREQUENCY (Hz)
R
L
= 600
Ω
Figure 8. Output Isolation
100
V
P
=10 V
R
L
=50
Ω
80
ISOLATION (dB)
CAPACITNCE (pF)
Figure 11. Leakage Current vs. Applied Voltage
100
OFF-STATE LEAKAGE CURRENT (pA)
90
80
70
60
50
40
30
20
10
0
0
50
100
150
200
250
300
350
400
LOAD VOLTAGE (V)
I
F
= 0 mA
T
A
= 25
°C
60
40
20
0
102
103
104
105
106
107
FREQUENCY (Hz)
Figure 9. Leakage Current vs. Applied Voltage at Elevated
Temperatures
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
50
100
150
200
250
300
350
400
70
°C
50
°C
OFF-STATE LEAKAGE CURRENT (nA)
Figure 12. Switch Breakdown Voltage vs. Temperature
8
6
4
2
0
–2
–4
–6
–8
–40
85
°C
CHANGE IN BREAKDOWN VOLTAGE (%)
NORMALIZED TO 25
°C
–20
0
20
40
60
80
LOAD VOLTAGE (V)
AMBIENT TEMPERATURE, T
A
(°C)
Document Number: 83825
Revision 17-August-01
www.vishay.com
3–117
Figure 13. Switch Offset Voltage vs. Temperature
5
I
F
= 5 mA
4
Figure 16. LED Offset Voltage vs. LED Current
0.6
0.5
0.4
3
(µA)
(µV)
2
0.2
1
0.1
0.0
20
30
40
50
60
70
80
90
0
5
10
15
20
25
AMBIENT TEMPERATURE, T
A
(°C)
LED FORWARD CURRENT (mA)
0
60
CHANGE IN TURN-0N TIME (%)
NORMALIZD TO 25
°C
50
40
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
CHANGE IN TURN-OFF TIME (%)
NORMALIZED TO 25
°C
I
F
= 5 mA
I
L
= 50 mA
0.3
Figure 14. Turn-On Time vs. Temperature
Figure 17. Turn-Off Time vs. Temperature
15
I
F
= 5 mA
I
L
= 50 mA
10
5
0
–5
–10
–15
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE, T
A
(°C) (mA)
AMBIENT TEMPERATURE, T
A
(°C)
Figure 15. Turn-On Time vs. LED Current
3.0
Figure 18. Turn-off Time vs. LED Current
3.0
85
°C
2.4
TURN-OFF TIME (ms)
TURN-ON TIME (ms)
2.4
1.8
85°
25°
–40°
0.6
1.8
25
°C
1.2
1.2
–40
°C
0.6
0.0
0
4
8
12
16
20
LED FORWARD CURRENT (mA)
0.0
0
4
8
12
16
20
LED FORWARD CURRENT (mA)
Document Number: 83825
Revision 17-August-01
www.vishay.com
3–118
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