I
NTEGRATED
C
IRCUITS
D
IVISION
ITC137P
Integrated Telecom Circuits
www.ixysic.com
DS-ITC137P_R06
1
Applications
Features
Description
Approvals
Ordering Information
Pin Configuration
• Data/Fax Modem
• Voice Mail Systems
• Telephone Sets
• Computer Telephony Integration
• Set Top Box Modems
• 3750V
rms
Input/Output Isolation
• FCC Compatible Part 68
• Full-Wave Bridge Rectifier
• Darlington Transistor for Electronic Inductor “Dry”
Circuits
• Full Wave Current Detector for Ring Signal or Loop
Current Detect
• 2mW Hook Switch Drive Power (Logic Compatible)
• Includes Zener Diodes
• Small 16-Pin SOIC Package (PCMCIA Compatible)
• Board Space and Cost Savings
• No Moving Parts
• JEDEC Standard Pin Out
• UL Recognized Component: File E76270
• CSA Certified Component: Certificate 1305490
• EN/IEC 60950-1 Certified Component:
TUV Certificate: B 12 11 82667 002
Parameter Rating Units
Relay Load Voltage 350 V
Relay Load Current 120 mA
rms
/ mA
DC
Relay On-Resistance (max) 15
Bridge Rectifier Reverse Voltage 100 V
Darlington Collector Current 120 mA
Darlington Current Gain 10,000 -
Part # Description
ITC137P 16-Pin SOIC (50/Tube)
ITC137PTR 16-Pin SOIC (1000/Reel)
ITC137P
PV
1
2
3
4
16
15
14
13
5
6
7
8
(N/C)
– LED - Form A Relay
– LED - Form A Relay
+ Zener Diode (cathode)
– Zener Diode (anode)
+ Zener Diode (cathode)
Collector - Phototransistor
Emitter - Phototransistor
Output Form A
Output Form A/Bridge Input –/+
Darlington Base
Darlington Emitter
Bridge Output +/Darlington Collector/
+ Zener Diode (cathode)
Bridge Output –/– Zener Diode (anode)
LED - Phototransistor –/+
LED - Phototransistor +/–
**
Denotes full-wave detection
**
12
11
10
9
This Integrated Telecom Circuit combines a single-pole,
normally open (1-Form-A) solid state relay, a bridge
rectifier, a Darlington transistor, an optocoupler, and
three Zener diodes into one 16-pin SOIC package,
consolidating designs and reducing component count
in telecom applications.
The ITC137’s optocoupler provides for full-wave
detection of ringing signals.
Switching Characteristics
of Normally Open Devices
Form-A
I
F
I
LOAD
10%
90%
t
on
t
off