Datasheet CYG2320, CYG2300 Datasheet (CPCLA)

1

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CYG23XX

DS-CPC2300-R1

Clare’s CybergateTM23XX DAA modules provide a com­plete 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

CYBERGATE™

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

5

3

RING

OH

Rm
560

1

2

10

6

7

11

4

TO TELEPHONE LINE

GYRATOR

SURGE

PROTECTOR

RING

DETECT

NETWORK

V

CC

V

CC

470Ω

56kΩ

HOOKSWITCH

V

CC

LINE 2

LINE 1

MUTE

RING

GND

GND

V

CC

TX1

TX2

RX

OH RELAY

RING

TIP

4.3V

4.3V

FROM µC

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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 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 V

Tip

-Ring=100VDC 10 - - MΩ

On-Hook Line Leakage Current V

Tip

-Ring=100VDC - - 10 µA

Off-Hook Relay Supply Current V

CC

=5V 7 8 9 mA

Hookswitch Power Source - 4.75 5.0 20 V

DC Loop Current - 5 - 120 mA

Mute Relay Supply Current VCC=5V 7 8 9 mA

AC Signal Path Electrical

Characteristics

Return Loss f=300-3500Hz 14 25 - dB
Insertion Loss

Transmit Test Circuit 1 - - 7 dB

Receive Test Circuit 2 - - 7 dB
Frequency Response f=300-3500Hz -0.25 - +0.25 dB
Longitudinal Balance

On-Hook - 60 - - dB

Off-Hook - 40 - - dB
Total Harmonic Distortion f=350Hz, P=-10dBm - -80 - dB
Secondary Load Impedance Line 1 and Line 2 - 100 - Ω
Primary Source Impedance Tip and Ring - 600 - Ω

Ring Detection Circuit

Characteristics

Ringing Voltage Detection Range - 29 - - V

RMS

Ringing Frequency Detection Range 50-70Hz 15 - 70 Hz
Ringer Impedance f=25Hz - 18 - KΩ
RING Output Voltage (Pulsed) V

CC

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

Surge, Transient, and Isolation

Characteristics

Surge Protection Voltage Tip and Ring - - - 300 V
Isolation Voltage

(Pins 1-7 to 10-11) 60 Seconds - - 1500 V

RMS

Parameter Min Typ Max Units

Isolation Voltage - - 1500 V

RMS

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

(Non-Condensing)

Soldering Temperature - - 260 °C
Tip/Ring Load Current

(continuous) - - 120 mA

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

Voltage V

CC

--20V

CYG23XX

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Rev. 1

3

CYG23XX 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.

3 O RING Active LOW indicates an incoming ring signal. This

is pulsed LOW by the AC ring signal at the ring fre-

quency.
4 I GND Connected to host system ground.
5 I OH Driving this pin LOW asserts the off-hook condi-

tion. The hookswitch LED is current limited by an

internal 470W resistor.
6 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
7IV

CC

Provides power to the hookswitch LED. Typically

+5V for 8mA LED current. LED is current limited

by an internal 470W resistor. V

CC

should not

exceed 20V.

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

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

LINE1
LINE2

+V

BATT

-V

BATT

OH

RING

10H

600

10H

TIP

RING

V

CC

GND

MUTE

Rm

560

V

T

V

LT

I

LOOP

1. CYG23XX Transmit Insertion Loss

G Log

V

V

TR

LT

T

= 20

Transmit Insertion Loss =

+5V

+V

BATT

-V

BATT

10H

600

10H

TIP

RING

V

R

V

LR

I

LOOP

2. CYG23XX Receive Insertion Loss

Rm

560

AC

Source

LINE1
LINE2

OH

RING

V

CC

GND

MUTE

G

Log

V
V

RC

R

LR

=

20

Receive Insertion Loss =

+5V

Top View

1
2
3
4
5
6
7

11
10

V

CC

GND

TIP
RING

LINE 1
LINE 2

OH

RING

MUTE

CYG23XX

Test Circuits

Package Pinouts

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4

CYG23XX

Rev. 1

OH

CYG23XX

MUTE

µ

C

Output Port

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 sig­nal 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

OH

MUTE

MUTE and OH Timing

Figure 1

OH

CYG23XX

MUTE

µ

C

Output Port

Output Port

Figure 2

CLARE LOCATIONS

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Tel: [phone]
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Toll Free: 1-800-27-CLARE

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Tel: [phone]
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AMERICAS

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Canada

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Burlington, Ontario L7N 3N1
Tel: [phone]
Fax: [phone]

EUROPE

European Headquarters

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Bampslaan 17
B-3500 Hasselt (Belgium)
Tel: [phone]
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France

Clare France Sales
Lead Rep
99 route de Versailles
91160 Champlan
France
Tel: [phone]
Fax: [phone]

Germany

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

Italy

C.L.A.R.E.s.a.s.
Via C. Colombo 10/A
I-20066 Melzo (Milano)
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Sweden

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Box 167
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United Kingdom

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Bindon Road
Taunton
UK-Somerset TA2 6BG
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ASIA PACIFIC

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Worldwide Sales Offices

Specification: DS-CYG23XX-R1
©Copyright 2000, 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.