CYG2911
Cybergate™
Features
•
Transformer signal coupling
•
Complete ring detector circuit
•
Low power hookswitch
•
Electronic inductor/gyrator circuit
•
Surge protection
•
Caller ID pinout to external relay (optional)
•
Transient protection zeners
•
V.32 compatible
•
FCC Compatible
•
PC board mountable
•
Parallel telephone off-hook detection
Description
The CYG2911 is a Data Access Arrangement (DAA) mod-
ule providing a complete telephone line interface circuit in
a small 1.07" x 1.07" x 0.4" plastic package. This module
incorporates a circuit which signals HIGH when another
phone in parallel has been taken off-hook when the
CYG2911 is off-hook. This feature is important for cable
TV set-top boxes and direct broadcast satellite units
which must hang-up (go on-hook) when a consumer
needs the phone line to place a 911 or emergency call.
The module is designed to meet FCC Part 68 require-
ments thus providing a low-risk design solution.
Applications
•
Home medical devices
•
Plant monitoring equipment
•
Security/alarm systems
•
Utility meters
•
Network routers
•
PBX systems
•
Telephony applications
•
Set top boxes
Approvals
•
UL 1950/UL1459
•
Compatible with U.S. and Canadian phone lines
Ordering Information
Part #
CYG2911
Description
DAA Module
Block Diagram
CYG2911
LINE 1
LINE 2
1
2
GYRATOR/
CALLER ID
RING
R_LIM
18
17
470Ω V
CC
V
CC
GND
HOOKSWITCH
14
13
911
CID1
CID2
911
OH
RING
7
8
9
200k
47k
R_LIM
V
CC
V
CC
RING
SURGE
DETEC- PROTEC-
TION
TION
11
10
TIP
RING
RING
Handling and Assembly Recommendations
The CYG2911 products are not hermetically sealed and should not be exposed to any liquid-based rinsing processes. Clare recommends two (2) approaches. The modem
should either use a no clean soldering flux that would mostly evaporate during the normal wave soldering processes, or be soldered in by hand after the rest of the card
is wave soldered.
DS-CYG2911-R1
www.clare.com
1
CLARE [ CLARE, INC. ]
