LH1549AB/AAC/AACTR
1 Form A
Phototransistor
Telecomswitch
FEATURES
• Solid State Relay and an Autopolarity
Optocoupler in a Single Package
• I/O Isolation Voltage, 5300 V
RMS
• Surface Mountable
• Optocoupler
– Bidirectional Current Detection
• Solid State Relay
– 1 Form A (LH1525 Type)
– Current-limit Protection
– Linear, AC/DC Operation
– Clean, Bounce-free Switching
– Low Power Consumption
AGENCY APPROVALS
•
•
•
•
UL – File No. E52744
CSA – Certification 093751
BSI/BABT Cert. No. 7980
FIMKO Approval
Package Dimensions in Inches (mm)
DIP
pin one ID
4
.268 (6.81)
.255 (6.48)
5
6
7
8
3
2
1
S
8
S'
7
6
5
S
S'
.390 (9.91)
.379 (9.63)
.045 (1.14)
.030 (0.76)
4° typ.
.031 (0.79)
1
2
3
4
.300 (7.62)
typ.
.150 (3.81)
.130 (3.30)
.050 (1.27)
.022 (.56)
.018 (.46)
.035 (.89)
.020 (.51)
.100 (2.54) typ.
10°
3°–9°
.012 (.30)
.008 (.20)
.130 (3.30)
.110 (2.79)
.250 (6.35)
.230 (5.84)
SMD
Pin one I.D.
APPLICATIONS
• General Telecom Switching
– On/off-hook Control
– Dial Pulse
– Ring-current Detection
– Loop-current sensing
DESCRIPTION
A Telecom Switch consists of an optically isolated, SPST
solid-state relay (SSR) and a bidirectional input opto-
coupler in a single package. The SSR is ideal for per-
forming switchhook and dial-pulse switching while the
optocoupler performs ring detect and loop current
sensing functions.
The SSR is integrated on a monolithic receptor die. It
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 antiparallel GaAIAs infrared emitting diodes. The
optocoupler provides a minimum current transfer ratio
(CTR) of 33%.
4°
typ.
.050
(1.27)
typ.
.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
°
.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
LH1549AB
LH1549AAC
LH1549AACTR
Description
8-pin DIP, Tubes
8-pin SMD, Gullwing, Tubes
8-pin SMD, Gullwing, Tape and Reel
Document Number: 83840
Revision 17-August-01
www.vishay.com
3–185
Absolute Maximum Ratings,
T
A
=25
°
C
Stresses in excess of the absolute Maximum Ratings can cause permanent damage to
the device. These are absolute stress ratings only. 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.
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 Test Voltage (
V
ISO
) .......................................5300 V
RMS
SSR Ratings
LED Continuous Forward Current (
I
F
) ................................................... 50 mA
LED Reverse Voltage (
I
R
≤
10
µ
A) (
V
R
) ......................................................5.0 V
dc or Peak ac Load Voltage (
I
L
≤
50
µ
A) (
V
L
) ...........................................400 V
Continuous dc Load Current (
I
L
)
(Unidirectional Operation) ................................................................. 120 mA
Output Power Dissipation (continuous) (
P
DISS
)...................................600 mW
Optocoupler Ratings
LED Continuous Forward Current (
I
F
) ................................................. 120 mA
Collector-emitter Breakdown Voltage (
BV
CEO
) ..........................................30 V
Phototransistor Power Dissipation (
P
DISS
)...........................................150 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 only and are not part of the testing requirements.
SSR Characteristics
Input
LED Forward Current for Switch Turn-on
LED Forward Current for Switch Turn-off
LED Forward Voltage
Output
ON-resistance
ac/dc Pins 4 (±) to 6 (±)
Current Limit
ac/dc Pins 4 (±) to 6 (±)
Off-state Leakage Current
I
Fon
I
Foff
—
0.1
0.8
0.3
0.4
1.2
0.5
—
1.4
mA
mA
V
Ω
mA
nA
µ
A
pF
Sym.
Min.
Typ.
Max.
Units
Test Conditions
I
L
=100 mA, t=10 ms
V
L
=±350 mA
I
F
=3.0 mA
I
F
=1.5 mA,
I
L
=50 mA
I
F
=5.0 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
V
F
R
ON
I
LMT
—
17
170
—
—
25
210
0.04
—
50
9.0
36
270
200
1.0
—
—
Output Capacitance
Pin 7 to 8
Transfer
Input/Output Capacitance
Turn-on Time
Turn-off Time
—
—
—
C
ISO
t
on
t
off
Sym.
—
—
—
Min.
1.3
0.5
0.4
Typ.
—
1.0
0.9
Max.
pF
ms
ms
Units
V
ISO
=1.0 V
I
F
=5.0 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=50 mA
Test Conditions
Optocoupler Characteristics
Input
LED Forward Voltage
Output
Saturation Voltage
Leakage Current
Trickle Current Leakage
Transfer
dc Current Transfer Ratio
Document Number: 83840
Revision 17-August-01
V
F
V
CE(Sat)
I
CEO
I
CEO
CTR
0.9
1.2
1.5
V
I
F
=10 mA
I
F
=16 mA,
I
C
=2.0 mA
I
F
=0 mA,
V
CE
=5.0 mA
I
F
=5.0
µ
A,
V
CE
=5.0 mA
I
F
=6.0 mA,
V
CE
=0.5 V
www.vishay.com
3–186
—
—
—
0.7
—
—
0.5
500
1.0
V
nA
µ
A
33
165
—
%
Embedded System
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