CLARE CYG2300 Cybergate Datasheet

CYG23XX
CYBERGATE™
Features
• 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
Description
Clare’s CybergateTM 23XX 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.
Applications
• 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
Approvals
• BSI Approved to EN60950
Certification #: 8123
Ordering Information
Part #
CYG2300
CYG2320
Description
DAA Module Germany
DAA Module Australia
Block Diagram
FROM µC
6
TX1
HYBRID
CIRCUIT
TX2
MUTE
LINE 1
4.3V
4.3V
LINE 2
VCC
1
10
2
VCC
RING
DETECT
NETWORK
RX
GND
RING
OH
RING
RING
GYRATOR
HOOKSWITCH
OH RELAY
VCC
7
5
3
SURGE
PROTECTOR
Rm
560
TO TELEPHONE LINE
11
470Ω
TIP
4
56kΩ
VCC
GND
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.
DS-CPC2300-R1
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1
CYG23XX
Absolute Maximum Ratings (@ 25˚ C)
Parameter
Min
Isolation Voltage
Operational Temperature
0
Storage Temperature
0
Relative Humidity
10
(Non-Condensing)
Soldering Temperature
Tip/Ring Load Current
(continuous)
Hookswitch LED Drive Current Hookswitch LED Reverse VoltageRing Detect Phototransistor
Voltage VCC
-
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.
Typ Max Units
- 1500 VRMS
70
°C
100
°C
85
%
-
260
°C
-
120
50
5
mA
mA
V
-
20
V
Electrical Characteristics
Parameter
DC Electrical Characteristics
On-Hook Impedance
On-Hook Line Leakage Current
Off-Hook Relay Supply Current
Hookswitch Power Source
DC Loop Current
Mute Relay Supply Current
AC Signal Path Electrical
Characteristics
Return Loss
Insertion Loss
Transmit
Receive
Frequency Response
Longitudinal Balance
On-Hook
Off-Hook
Total Harmonic Distortion
Secondary Load Impedance
Primary Source Impedance
Ring Detection Circuit
Characteristics
Ringing Voltage Detection Range
Ringing Frequency Detection Range
Ringer Impedance
RING Output Voltage (Pulsed)
Logic ‘0’, Ring present
Logic ‘1’, Ring not present
Surge, Transient, and Isolation
Characteristics
Surge Protection Voltage Tip and Ring
Isolation Voltage
(Pins 1-7 to 10-11)
2
Conditions
Min
Typ
Max
Unit
VTip-Ring=100VDC
VTip-Ring=100VDC
VCC=5V
VCC=5V
10
7
4.75
5
7
8
5.0
8
10
9
20
120
9
MΩ
µA
mA
V
mA
mA
f=300-3500Hz
14
25
-
dB
Test Circuit 1
Test Circuit 2
f=300-3500Hz
-0.25
-
7
7
+0.25
dB
dB
dB
f=350Hz, P=-10dBm
Line 1 and Line 2
Tip and Ring
60
40
-
-80
100
600
-
dB
dB
dB
Ω
Ω
50-70Hz
f=25Hz
VCC =+5V
29
15
-
18
70
-
VRMS
Hz
KΩ
-
-
0.8
Vcc
V
V
-
-
-
300
V
60 Seconds
-
-
1500
VRMS
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Rev. 1
CYG23XX
Test Circuits
2. CYG23XX Receive Insertion Loss
1. CYG23XX Transmit Insertion Loss
VT
Rm
560
+5V
LINE1
LINE2
RING
GND
OH
MUTE
VCC
VR
Rm
560
+VBATT
ILOOP
10H
+5V
TIP
LINE1
LINE2
RING
GND
OH
MUTE
VCC
+VBATT
ILOOP
TIP
600
VLR
600
VLT
10H
RING
RING
Transmit Insertion Loss = GTR = 20 Log
10H
VLT
VT
Receive Insertion Loss = G RC = 20 Log
VR
AC
Source
10H
V LR
-VBATT
-VBATT
Package Pinouts
CYG23XX Pinouts & Definitions
CYG23XX
LINE 1
LINE 2
RING
GND
OH
MUTE
VCC
PIN# I/O
1
2
3
4
5
6
7
11
10
TIP
RING
Name
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 frequency.
4
I
GND
Connected to host system ground.
5
I
OH
Driving this pin LOW asserts the off-hook condition. 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
7
I
VCC
Provides power to the hookswitch LED. Typically
+5V for 8mA LED current. LED is current limited
by an internal 470W resistor. VCC should not
exceed 20V.
Top View
Rev. 1
Function
1
11
I/O RING
Connection to telephone line Ring conductor.
10
I/O
Connection to telephone line Tip conductor.
TIP
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3
CYG23XX
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.
OH
MUTE
80mS
MUTE and OH Timing
Figure 1
Output Port
OH
Output Port
CYG23XX
MUTE
µC
Figure 2
Output Port
One-shot*
OH
80ms
µC
CYG23XX
Output Port
(Pulse Dial)
Shunt
MUTE
* Micrel MIC1555 or Equivalent
Figure 3
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.
4
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Rev. 1
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Tel: 1-949-831-4622
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Lead Rep
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Germany
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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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http://www.clare.com
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.
Specification: DS-CYG23XX-R1
©Copyright 2000, Clare, Inc.
All rights reserved. Printed in USA.
1/12/01
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