Datasheet CYG2911 Datasheet (CPCLA)

1

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CYG2911

DS-CYG2911-R1

The CYG291 1 is a Data Access Arrangement (DAA) mod­ule 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 require­ments thus providing a low-risk design solution.

• Home medical devices

• Plant monitoring equipment

• Security/alarm systems

• Utility meters

• Network routers

• PBX systems

• Telephony applications

• Set top boxes

• UL 1950/UL1459

• Compatible with U.S. and Canadian phone lines

• 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

Applications

Features

Description

Approvals

Cybergate™

Ordering Information

Part # Description

CYG2911 DAA Module

Block Diagram

8

7

9

RING

OH

911

1
2

17

18

11

10

14
13

HOOKSWITCH

LINE 2

LINE 1

RING

GND

V

CC

V

CC

TIP
RING

GYRATOR/
CALLER ID

V

CC

RING

R_LIM

R_LIM

V

CC

200k

47k

911

RING

DETEC-

TION

SURGE

PROTEC-

TION

CID1
CID2

CYG2911

470Ω

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.

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CYG2911

R1

Electrical Characteristics

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.

Absolute Maximum Ratings (@ 25˚ C)

2

Parameter Conditions Min Typ Max Unit

DC Electrical Characteristics

On-Hook Impedance @100VDC across pins 10 - - MΩ

10,11 (R,T), per FCC 68.312

Off-Hook Line Leakage Current @100VDC across pins - - 10 µA

10,11 (R,T), per FCC 68.312
Hookswitch Resistance - - - 15 Ω
Off-Hook Supply Current @+5V, V

CC

789mA
Hookswitch Power Source, Pin 8 - 4.75 5.0 20 V
DC Loop Current - 20 - 120 mA

AC Signal Path Electrical Characteristics

Return Loss 300-3500Hz 18 25 - dB
Insertion Loss

Transmit Test Circuit 1 - - 9 dB

Receive Test Circuit 2 - - 9 dB
Frequency Response 300-3500Hz -0.25 - +0.25 dB
Longitudinal Balance

On-Hook Per FCC 68.310 60 - - dB

Off-Hook Per FCC 68.310 40 - - dB
DC Loop Current - 20 - 120 mA
Total Harmonic Distortion + N @600Hz and -10dBm - -45 - dBm
Secondary Load Impedance Line 1 and Line 2 - 294 - Ω
Primary Source Impedance Tip and Ring - 600 - Ω
Ring Detection Circuit Characteristics
Ringing Voltage Detection Range - 20 - 150 V

RMS

Ringing Frequency Detection Range - 15 - 70 Hz
Ringer Equivalence Number - - 0.8B ­RING (Pin 9) Output Voltage (Pulsed) V

CC

@+5V
Logic ‘0’, Ring present - - 0.8 V
Logic ‘1’, Ring not present - - V

CC

V

Surge, Transient, and Isolation Characteristics

Surge Protection Voltage Tip and Ring

(Pins 11,10) - - - 300

Transient Voltage Protection on

Line 1 and Line 2 (Pins 1,2) - -5 - +5 V

Isolation Voltage

(Pins 1,2,7,8,9,17,18 to 10,11,13,14) Per FCC 68.302 - - 1000 V

RMS

Parameter Min Typ Max Units

Isolation Voltage - 1000 V

RMS

Operational Temperature 0 +70 °C
Storage Temperature 0 - +100 °C
Relative Humidity 10 - 85 %

(Non-Condensing)

Soldering Temperature - - +260 °C
Tip/Ring (5, 6) Load Current

(continuous) - - 120 mA

Hookswitch LED Drive Current - - 50 mA
Hookswitch LED Reverse Voltage - - 5 V
Ring Detect Phototransistor

Voltage V

CC

--20V

CYG2911

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R1

3

Electrical Characteristics (Continued)

Parameter Conditions Min Typ Max Unit

911 Detection Characteristics (Pin 7)

Pulse Voltage

External phone off-hook - 2.4 - V

CC

V

External phone on-hook - - - 0.8 V

Pulse Width Telephone DCR 200Ω 20 40 60 mS
Internal pull-up resistor - - 200K - Ω

Top View

18
17

1
2

8

7
9

11
10

V

CC

GND

TIP
RING

14
13

CID1
CID2

LINE 1
LINE 2

911

OH

RING

CYG2911

1

2

13

14

VCC

µP Control

(Active Low)

CID1

CID2

CYG2911
Caller ID Connections

Pins 13 & 14 should be connected to a 1-Form-A
relay (Clare LCA110), as follows:

CYG2911 Pinouts & Definitions

PIN# I/O Name Function

1 I/O LINE1 Transformer isolated audio signal coupling path for the

telephone line.

2 I/O LINE2 Transformer isolated audio signal coupling path for the

telephone line.

7 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.

8 I OH Driving this pin LOW asserts the off-hook condition. The

hookswitch LED is current limited by an internal 470Ω
resistor.

9 O RING Active LOW indicates an incoming ring signal. This is

pulsed LOW by the AC ring signal at the ring frequency
from 15-40Hz.

10 I/O RING Connection to telephone line Ring conductor.

11 I/O TIP Connection to telephone line Tip conductor.

13 O CID2 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.

14 O CID1 Caller ID connection. See CID2 above.
17 I GND Connected to host system ground.
18 I V

CC

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.

Package Pinout

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European Headquarters

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France

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Lead Rep
99 route de Versailles
91160 Champlan
France
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Germany

Clare Germany Sales
ActiveComp Electronic GmbH
Mitterstrasse 12
85077 Manching
Germany
Tel: [phone]
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Italy

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Worldwide Sales Offices

Specification: DS-CYG2911-R1
©Copyright 2001, Clare, Inc.
All rights reserved. Printed in USA.
1/12/01

Clare cannot assume responsibility for use of any circuitry other
than circuitry entirely embodied in this Clare product. No circuit
patent licenses nor indemnity are expressed or implied. Clare
reserves the right to change the specification and circuitry, with­out notice at any time. The products described in this document
are not intended for use in medical implantation or other direct life
support applications where malfunction may result in direct phys­ical harm, injury or death to a person.