www.clare.com

CYG23XX

DS-CPC2300-R1

Clare's Cybergate

23XX DAA modules provide a com-

plete telephone line interface circuit in a small 1.07" x
1.07" x 0.4" package. This module provides a fast and
cost effective solution for designs that require an interface
to the telephone line. The CYG23XX0 is designed to
meet PTT and safety regulations in Germany.

Home medical devices

Plant monitoring equipment

Security/alarm systems

Utility meters

Modems

Voicemail systems

Vending machines

Elevator control boxes

Network routers

PBX Systems

PC mother boards

Telephony applications

Digital telephone answering machines

BSI Approved to EN60950
Certification #: 8123

Low distortion transformer signal coupling

Complete ring detector circuit

Low power hookswitch

Electronic inductor/gyrator circuit

Surge protection

V.32 bis /V.34 compatible

PC board mountable

16kHz metering filter

Applications

Features

Description

Approvals

CYBERGATETM

Ordering Information

Part #

Description

CYG2300

DAA Module Germany

CYG2320

DAA Module Australia

Block Diagram

Handling and Assembly Recommendations
The CYG23XX 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.

HYBRID

CIRCUIT

RING

560

TO TELEPHONE LINE

GYRATOR

SURGE

PROTECTOR

RING

DETECT

NETWORK

470

56k

HOOKSWITCH

LINE 2

LINE 1

MUTE

RING

GND

TX1

TX2

OH RELAY

RING

TIP

4.3V
4.3V

FROM

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CYG23XX

Rev. 1

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 opera-
tional 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)

Parameter

Conditions

Min

Typ

Max

Unit

DC Electrical Characteristics

On-Hook Impedance

Tip

-Ring=100VDC

On-Hook Line Leakage Current

Tip

-Ring=100VDC

ľA

Off-Hook Relay Supply Current

=5V

Hookswitch Power Source

4.75

5.0

DC Loop Current

120

Mute Relay Supply Current

=5V

AC Signal Path Electrical

Characteristics

Return Loss

f=300-3500Hz

Insertion Loss

Transmit

Test Circuit 1

Receive

Test Circuit 2

Frequency Response

f=300-3500Hz

-0.25

+0.25

Longitudinal Balance

On-Hook

Off-Hook

Total Harmonic Distortion

f=350Hz, P=-10dBm

-80

Secondary Load Impedance

Line 1 and Line 2

100

Primary Source Impedance

Tip and Ring

600

Ring Detection Circuit

Characteristics

Ringing Voltage Detection Range

RMS

Ringing Frequency Detection Range

50-70Hz

Ringer Impedance

f=25Hz

RING Output Voltage (Pulsed)

=+5V

Logic `0', Ring present

0.8

Logic `1', Ring not present

Vcc

Surge, Transient, and Isolation

Characteristics

Surge Protection Voltage Tip and Ring

300

Isolation Voltage

(Pins 1-7 to 10-11)

60 Seconds

1500

RMS

Parameter

Min

Typ

Max Units

Isolation Voltage

1500 V

RMS

Operational Temperature

°C

Storage Temperature

100

°C

Relative Humidity

(Non-Condensing)

Soldering Temperature

260

°C

Tip/Ring Load Current

(continuous)

120

Hookswitch LED Drive Current

Hookswitch LED Reverse Voltage-

Ring Detect Phototransistor

Voltage V

CYG23XX

www.clare.com

Rev. 1

CYG23XX Pinouts & Definitions

PIN# I/O

Name

Function

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.

RING

Active LOW indicates an incoming ring signal. This
is pulsed LOW by the AC ring signal at the ring fre-
quency.

GND

Connected to host system ground.

Driving this pin LOW asserts the off-hook condi-
tion. The hookswitch LED is current limited by an
internal 470W resistor.

I MUTE

Driving this pin LOW activates the mute relay for
pulse dialing. See Figure 1. The mute relay LED is
current limited by an internal 470W resistor or

Provides power to the hookswitch LED. Typically
+5V for 8mA LED current. LED is current limited
by an internal 470W resistor. V

should not

exceed 20V.

I/O RING

Connection to telephone line Ring conductor.

I/O

TIP

Connection to telephone line Tip conductor.

LINE1
LINE2

BATT

-V

BATT

RING

10H

600

10H

TIP

RING

GND

MUTE

560

LOOP

1. CYG23XX Transmit Insertion Loss

Log

Transmit Insertion Loss =

+5V

BATT

-V

BATT

10H

600

10H

TIP

RING

LOOP

2. CYG23XX Receive Insertion Loss

560

Source

LINE1
LINE2

RING

GND

MUTE

Log

Receive Insertion Loss =

+5V

Top View

2
3
4
5
6

GND

TIP
RING

LINE 1
LINE 2

RING

MUTE

CYG23XX

Test Circuits

Package Pinouts

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CYG23XX

Rev. 1

CYG23XX

MUTE

Output Port

Figure 3

(Pulse Dial)

Shunt

One-shot*

80ms

* Micrel MIC1555 or Equivalent

Asserting the MUTE pin causes the internal gyrator circuit in the CYG23XX to be bypassed, allowing
low impedance pulse dialing to be performed by pulsing the OH pin. In Figure 2, the microcontroller
output port going to the MUTE pin is used as a shunt for low impedance dialing and is asserted for
80mS when the OH signal is asserted. This method is preferred when the user has control of the host
firmware and can easily write a subroutine to accomplish this function.

For users that do not have easy access to the modem firmware, some external hardware can be
added to accomplish the same function. Figure 3 shows a monostable (one-shot) such as a 555 timer
which is designed to generate an 80mS low going pulse upon the assertion of the OH signal. This
80mS pulse is ANDed with the low impedance pulse dial shunt signal which overrides the 80mS sig-
nal when pulse dialing is enabled. The pulse dial shunt signal is included as a standard output pin in
most modem chipsets. This pin is activated when an ATDP command is issued to the modem.

Off-Hook Transient Requirement

In order to meet Section 4.6.1 of the CTR-21 requirement, it is necessary to assert the MUTE pin of the
CYG23XX) for a duration of 80mS after the OH pin is driven low as shown in Figure 1. This can be
accomplished via the host firmware or external hardware as shown in Figures 2 and 3 respectively.

80mS

MUTE

MUTE and OH Timing

Figure 1

CYG23XX

MUTE

Output Port

Figure 2

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Tel: 1-978-524-6700
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Tel: 1-949-831-4622
Fax: 1-949-831-4628

SALES OFFICES

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European Headquarters
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Tel: 32-11-300868
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France
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Lead Rep
99 route de Versailles
91160 Champlan
France
Tel: 33 1 69 79 93 50
Fax: 33 1 69 79 93 59

Germany
Clare Germany Sales
ActiveComp Electronic GmbH
Mitterstrasse 12
85077 Manching
Germany
Tel: 49 8459 3214 10
Fax: 49 8459 3214 29

Italy
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I-20066 Melzo (Milano)
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ASIA PACIFIC

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http://www.clare.com

Worldwide Sales Offices

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, with-
out 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 phys-
ical harm, injury or death to a person.

Part Number CYG2300