LH1539AB Datasheet, PDF (1/5 Pages) Vishay Siliconix – Solid State Relay and Autopolarity Optocoupler in One 8-pin Package

FEATURES
• Solid State Relay and Autopolarity Optocoupler
in One 8-pin Package
• I/O Isolation, 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
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
DESCRIPTION
The LH1539 telecom switch consists of an optically iso-
lated solid state relay (SSR) Form A and a bidirectional
input optocoupler in a single 8-pin package. The SSR is
ideal for switchhook and dial-pulse switching while the
optocoupler performs ring detect and loop current sens-
ing 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 cir-
cuitry that protects the relay from telephone line induced
lightning surges.
The optocoupler provides bidirectional current sensing
via two antiparallel 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.
LH1539AB/AAC/AACTR
1 Form A
Photo Darlington
Telecomswitch
Package Dimensions in Inches (mm)
DIP
pin one ID
8
76
5
4 321
.268 (6.81)
.255 (6.48)
5 678
.045 (1.14)
.030 (0.76)
4° typ.
.050 (1.27)
.022 (.56)
.018 (.46)
SMD
.390 (9.91)
.379 (9.63)
.031 (0.79)
.150 (3.81)
.130 (3.30)
.035 (.89)
.020 (.51)
.100 (2.54) typ.
1
2
.300 (7.62)
typ.
10°
3°–9°
.012 (.30)
.008 (.20)
Pin one I.D.
3
4
.250 (6.35)
.230 (5.84)
.130 (3.30)
.110 (2.79)
.268 (6.81)
.255 (6.48)
.390 (9.91)
.379 (9.63)
.045 (1.14)
.030 (0.78)
.031 (.79)
typ.
.150 (3.81)
.130 (3.30)
Radius
.395 (10.03)
.375 (9.52)
.312 (7.80)
.298 (7.52)
4°
typ.
.050
(1.27)
typ.
.008 (.25)
.004 (.10)
.100 (2.54)
typ.
.040 (1.02)
.020 (.51)
10°
.315
(8.00)
typ.
3° to 7°
.010
(2.54)
typ.
Part Identification
Part Number
LH1539AB
LH1539AAC
LH1539AACTR
Description
8-pin DIP, Tubes
8-pin SMD, Gullwing, Tubes
8-pin SMD, Gullwing, Tape and Reel
Document Number: 83832
Revision 17-August-01
www.vishay.com
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