LH1539AAC_11 Datasheet, PDF (1/6 Pages) Vishay Siliconix – 1 Form A Photo Darlington Telecom Switch

LH1539AAC, LH1539AACTR, LH1539AB
Vishay Semiconductors
1 Form A Photo Darlington Telecom Switch
DIP
SMD
1
8
7
2
3
6
4
5
i179055-1
i179034_2
DESCRIPTION
The LH1539 telecom switch consists of an optically isolated
solid state relay (SSR) form A and a bidirectional input
optocoupler in a single 8-pin package. The SSR is ideal for
switch hook and dial-pulse switching while the optocoupler
performs ring detect and loop current sensing 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
circuitry that protects the relay from telephone line induced
lightning surges.
The optocoupler provides bidirectional current sensing via
two anti parallel 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.
FEATURES
• Solid state relay and autopolarity optocoupler
in one 8-pin package
• Isolation test voltage 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 
- Load voltage 400 V
- Load current 120 mA
- Current limit protection
- Linear, AC/DC operation
- Clean bounce free switching
- Low power consumption
• Compliant to RoHS Directive 2002/95/EC and in
accordance to WEEE 2002/96/EC
APPLICATIONS
• General telecom switching
- On/off hook switching
- Dial pulse
- Ring current detection
- Loop current sensing
AGENCY APPROVALS
UL1577:
file no. E52744 system code H, double
protection
CSA:
certification no. 093751
BSI/BABT: certification no. 7980
ORDERING INFORMATION
L
H
1
5
3
PART NUMBER
PACKAGE
SMD-8, gullwing, tubes
SMD-8, gullwing, tape and reel
DIP-8, tubes
9
A
#
#
ELECTR. PACKAGE
VARIATION CONFIG.
T
R
DIP
TAPE AND
REEL
7.62 mm
UL, CSA, BSI
LH1539AAC
LH1539AACTR
LH1539AB
SMD
> 0.1 mm
Document Number: 83832
Rev. 1.4, 11-Mar-11
For technical questions, contact: [e-mail]
www.vishay.com
1
This datasheet is subject to change without notice.
THE PRODUCT DESCRIBED HEREIN AND THIS DATASHEET ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000