LH1529
OPTICALLY COUPLED TELECOM SWITCH
Preliminary Data Sheet
FEATURES
Package Dimensions in Inches (mm)
• Solid State Relay and Optocoupler in One Package
• Package—Single 8 Pin DIP
Pin One I.D.
8S
4
5
3
2
1
A1
K2
• l/O Isolation, 3750 V
RMS
.268 (6.81)
.255 (6.48)
• Surface Mount Option
• Optocoupler
– Bidirectional Current Detection
• Solid-state Relay
7S’
6A/K
C3
E4
6
7
8
.390 (9.91)
.379 (9.63)
5A/K
– Typical RON 20 Ω
.305 Typ.
(7.75) Typ.
.045 (1.14)
.030 (.76)
– Load Voltage 350 V
.150 (3.81)
.130 (3.30)
– Load Current 120 mA
– Current Limit Protection
– High Surge Capability
– Linear, AC/DC Operation
– Clean Bounce Free Switching
– Low Power Consumption
– High Reliability Monolithic Receptor
.135 (3.43)
.115 (2.92)
4° Typ.
10 ° Typ.
3°–9°
.012 (.30)
.008 (.20)
.040 (1.02)
.030 (.76 )
.022 (.56)
.018 (.46)
.100 (2.54) Typ.
“S” Bend Leads: Package Dimensions in Inches (mm)
APPLICATIONS
.400 (10.16)
.380 (9.65)
• General Telecom Switching
– On/off Hook Control
– Dial Pulse
.100 (2.54)
typ.
– Ring Current Detection
– Loop Current Sensing
.260 (6.60)
.240 (6.10)
.480 (12.19)
.460 (11.68)
Pin 1
Ident.
Description
.050 (1.27)
.040 (1.01)
.040 (1.02)
.4 Pins
The LH1529 Telecom switch consists of an optically coupled
solid state relay (SSR) and a bidirectional input optocoupler.
The SSR is ideal for performing switchhook and dial-pulse
switching while the optocoupler performs ring detection and
loop current sensing functions. Both the SSR and opto cou-
.030 (.76)
.055 (1.40)
.045 (1.14)
typ.
.065
(1.65)
ref.
.340 (8.64)
.320 (8.13)
.15 (.38)
.008 (.20)
.150 (3.81)
.130 (3.30)
pler provide 3750 V
of input to ouput isolation.
RMS
.019 (.48)
.009 (.23)
.079
(2.01)
ref.
.065 (1.65)
.045 (1.14)
The SSR is integrated on a monolithic receptor die using high
voltage BCDMOS 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.
Absolute Maximum Ratings
Package
Ambient Temperature Range.................................–40 to +85°C
Storage Temperature Range ...............................–40 to +150°C
Soldering Temperature (t=10 sec. max.)......................... 260°C
The optocoupler provides bidirectional current sensing via
two antiparallel GaAs infrared emitting diodes. The opto
channel provides a minimum CTR of 33% at 6 mA.
Isolation Test Voltage ................................................ 3750 V
RMS
Isolation Resistance
V =500 V, T =25°C................................................... ≥10
12
11
The LH1529 comes in a 8 pin, plastic DIP. To order packages
with “S” bend leads, specify LH1529X00S.
Ω
Ω
IO
A
V =500 V, T =100°C................................................. ≥10
IO
A
Total Power Dissipation ................................................. 600 mW
SSR
LED Continuous Forward Current.....................................50 mA
LED Reverse Voltage (I ≤10 µA)........................................... 8 V
R
DC or Peak AC Load Voltage (I ≤50 µA)........................... 350 V
L
Continous DC Load Current ...........................................120 mA
Optocoupler
LED Continuous Forward Current.....................................50 mA
LED Reverse Voltage (I ≤10 µA)........................................... 3 V
R
Collector to Emitter Breakdown Voltage .............................. 30 V
Phototransistor Power Dissipation ................................. 150 mW
5–202