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
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1
CYG2911
Absolute Maximum Ratings (@ 25˚ C)
Parameter
Min
Isolation Voltage
-
Operational Temperature
0
Storage Temperature
0
Relative Humidity
10
(Non-Condensing)
Soldering Temperature
-
Tip/Ring (5, 6) Load Current
(continuous)
-
Hookswitch LED Drive Current -
Hookswitch LED Reverse Voltage-
Ring Detect Phototransistor
-
Voltage V
CC
Typ Max Units
1000 V
RMS
+70
°C
- +100 °C
-
85
%
-
-
-
-
-
+260
120
50
5
20
°C
mA
mA
V
V
Absolute Maximum Ratings are stress ratings. Stresses
in excess of these ratings can cause permanent damage
to the device. Functional operation of the device at these
or any other conditions beyond those indicated in the
operational sections of this data sheet is not implied.
Exposure of the device to the absolute maximum ratings
for an extended period may degrade the device and effect
its reliability.
Electrical Characteristics
Parameter
DC Electrical Characteristics
On-Hook Impedance
Off-Hook Line Leakage Current
Hookswitch Resistance
Off-Hook Supply Current
Hookswitch Power Source, Pin 8
DC Loop Current
AC Signal Path Electrical Characteristics
Return Loss
Insertion Loss
Transmit
Receive
Frequency Response
Longitudinal Balance
On-Hook
Off-Hook
DC Loop Current
Total Harmonic Distortion + N
Secondary Load Impedance
Primary Source Impedance
Ring Detection Circuit Characteristics
Ringing Voltage Detection Range
Ringing Frequency Detection Range
Ringer Equivalence Number
RING (Pin 9) Output Voltage (Pulsed)
Logic ‘0’, Ring present
Logic ‘1’, Ring not present
Surge, Transient, and Isolation Characteristics
Surge Protection Voltage Tip and Ring
(Pins 11,10)
Transient Voltage Protection on
Line 1 and Line 2 (Pins 1,2)
Isolation Voltage
(Pins 1,2,7,8,9,17,18 to 10,11,13,14)
Conditions
@100VDC across pins
10,11 (R,T), per FCC 68.312
@100VDC across pins
10,11 (R,T), per FCC 68.312
-
@+5V, V
CC
-
-
300-3500Hz
Test Circuit 1
Test Circuit 2
300-3500Hz
Per FCC 68.310
Per FCC 68.310
-
@600Hz and -10dBm
Line 1 and Line 2
Tip and Ring
-
-
-
V
CC
@+5V
Min
10
-
-
7
4.75
20
18
-
-
-0.25
60
40
20
-
-
-
20
15
-
-
-
Typ
-
-
-
8
5.0
-
25
-
-
-
-
-
-
-45
294
600
-
-
0.8B
-
-
Max
-
10
15
9
20
120
-
9
9
+0.25
-
-
120
-
-
-
150
70
-
0.8
V
CC
Unit
MΩ
µA
Ω
mA
V
mA
dB
dB
dB
dB
dB
dB
mA
dBm
Ω
Ω
V
RMS
Hz
V
V
-
-
Per FCC 68.302
-
-5
-
-
-
-
300
+5
1000
V
V
RMS
R1
2
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CYG2911
Electrical Characteristics (Continued)
Parameter
911 Detection Characteristics (Pin 7)
Pulse Voltage
External phone off-hook
External phone on-hook
Pulse Width
Internal pull-up resistor
Conditions
Min
Typ
Max
Unit
-
-
Telephone DCR 200Ω
-
2.4
-
20
-
-
-
40
200K
V
CC
0.8
60
-
V
V
mS
Ω
Package Pinout
CYG2911
LINE 1
LINE 2
1
2
18
17
14
13
7
8
9
Top View
11
10
V
CC
GND
CID1
CID2
TIP
RING
CYG2911 Pinouts & Definitions
PIN# I/O Name Function
1
2
7
I/O LINE1 Transformer isolated audio signal coupling path for the
telephone line.
I/O LINE2 Transformer isolated audio signal coupling path for the
telephone line.
O
911
Signals HIGH for 20-60ms when the CYG2911 is off-hook
and another phone goes off-hook. Glitches may appear on
this pin when the CYG2911 first goes off-hook, and should
be ignored for a minimum of 200ms.
Driving this pin LOW asserts the off-hook condition. The
hookswitch LED is current limited by an internal 470Ω
resistor.
Active LOW indicates an incoming ring signal. This is
pulsed LOW by the AC ring signal at the ring frequency
from 15-40Hz.
Connection to telephone line Ring conductor.
Connection to telephone line Tip conductor.
Caller ID connection. CID1/CID2 connect to an external 1-
Form-A solid state relay (Clare LCA110). When the SSR is
closed (connecting CID1 to CID2), Caller ID information is
presented to LINE1/LINE2 after the first telephone ring
burst.
Caller ID connection. See CID2 above.
Connected to host system ground.
Provides power to the hookswitch LED. Typically +5V for
≈
8mA LED current. LED is current limited by an internal
470Ω resistor. V
CC
should not exceed 20V.
911
OH
RING
8
I
OH
9
O RING
10
11
13
I/O RING
I/O
TIP
O CID2
14
17
18
CYG2911
Caller ID Connections
Pins 13 & 14 should be connected to a 1-Form-A
relay (Clare LCA110), as follows:
V
CC
1
14
CID1
O CID1
I
I
GND
V
CC
µP
Control
(Active Low)
R1
2
13
CID2
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3
For additional information please visit our website at: www.clare.com
Clare, Inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to specifications and product descriptions
at any time without notice. Neither circuit patent licenses nor indemnity are expressed or implied. Except as set forth in Clare’s Standard Terms and Conditions of Sale, Clare, Inc. assumes no liability whatsoever, and
disclaims any express or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right.
The products described in this document are not designed, intended, authorized or warranted for use as components in systems intended for surgical implant into the body, or in other applications intended to sup-
port or sustain life, or where malfunction of Clare’s product may result in direct physical harm, injury, or death to a person or severe property or environmental damage. Clare, Inc. reserves the right to discontinue or
make changes to its products at any time without notice.
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