CYG2320

CYG2320
CybergateTM DAA
INTEGRATED CIRCUITS DIVISION
Features
Description
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IXYS Integrated Circuits Division's CYG2320 Series
DAA Module provides a complete telephone line
interface circuit in a small (1.07" x 1.07" x 0.4")
package. The module provides a fast and
cost-effective solution for designs that require an
interface to the telephone line.
Low Distortion Transformer Signal Coupling
Complete Ringing Detector Circuit
Low Power Hook Switch
Electronic Inductor/Gyrator Circuit
Surge Protection
V.32 bis/V.34 Compatible
PC Board Mountable
16kHz Metering Filter
The CYG2320 is designed to meet PTT and safety
regulations in Australia.
Applications
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Approvals
Home Medical Devices
Plant Monitoring Equipment
Security/Alarm Systems
Utility Meters
Modems
Voice Mail Systems
Vending Machines
Elevator Control Boxes
Network Routers
PBX Systems
PC Mother Boards
Telephony Applications
Digital Telephone Answering Machines
• BSI Approved to EN60950 Ceritificate #8123
Ordering Information
Part
Description
CYG2320
DAA Modem Australia
Typical Application
FROM μC
6
TX1
HYBRID
CIRCUIT
TX2
LINE 1
4.3V
4.3V
LINE 2
VCC
1
10
2
VCC
RING
DETECT
NETWORK
RX
GND
RING
OH
RING
5
3
TO TELEPHONE LINE
11
470Ω
TIP
4
56kΩ
DS-CYG2320-R02
RING
GYRATOR
HOOKSWITCH
OH RELAY
VCC
7
SURGE
PROTECTOR
Rm
560
MUTE
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VCC
GND
1
CYG2320
INTEGRATED CIRCUITS DIVISION
1 Specifications
1.1 Absolute Maximum Ratings @ 25°C
Symbol
Isolation Voltage, Input to Output
Tip/Ring Load Current
(Continuous)
Hook Switch LED Drive Current
Hook Switch LED Reverse Voltage
Ring Detect Phototransistor
Voltage VCC
Relative Humidity
(non-condensing)
Operational Temperature
Storage Temperature
Ratings
Units
1500
Vrms
120
mA
50
mA
5
V
20
V
10-85
%
0-70
°C
0-100
°C
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 conditions
beyond those indicated in the operational sections of this
data sheet is not implied.
1.2 DC Electrical Characteristics @ 25°C (Unless Otherwise Noted)
Parameter
Conditions
Minimum
Typical
Maximum
Units
On-Hook Impedance
VTip-Ring = 100VDC
10
-
-
M
On-Hook Line Leakage Current
VTip-Ring = 100VDC
-
-
10
A
Off-Hook Relay Supply Current
VCC = +5V
7
8
9
mA
Hook Switch Power Source
-
4.75
5
20
V
DC Loop Current
-
5
-
120
mA
VCC = +5V
7
8
9
mA
Mute Relay Supply Current
1.3 AC Signal Path Electrical Characteristics @ 25°C (Unless Otherwise Noted)
Parameter
Return Loss
Conditions
Minimum
Typical
Maximum
Units
f=300Hz to 3500Hz
14
25
-
dB
Test Circuit 1
Test Circuit 2
-
-
7
dB
300Hz to 3500Hz
-0.25
-
+0.25
dB
-
-
dB
Insertion Loss
Transmit
Receive
Frequency Response
Longitudinal Balance
On-Hook
Off-Hook
Total Harmonic Distortion
-
60
40
f = 350Hz, P = -10dBm
-
-80
-
dB
Secondary Load Impedance
Line 1 & Line 2
-
100
-

Primary Source Impedance
Tip & Ring
-
600
-

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CYG2320
INTEGRATED CIRCUITS DIVISION
1.4 Ring Detection Circuit Electrical Characteristics @ 25°C (Unless Otherwise Noted)
Parameter
Conditions
Minimum
Typical
Maximum
Units
-
-
Vrms
Ringing Voltage Detection Range
Ringing Frequency Detection Range
-
29
50Hz to 70Hz
15
-
70
Hz
f = 25Hz
-
18
-
k
VCC = +5V
-
-
Ringing Impedance
RING Output Voltage (Pulsed)
Logic “0”, Ring Present
Logic “1”, Ring Not Present
0.8
VCC
V
1.5 Surge, Transient, and Isolation Electrical Characteristics @ 25°C (Unless Otherwise Noted)
Parameter
Conditions
Minimum
Typical
Maximum
-
-
-
300
V
1500
Vrms
Surge Protection Voltage Tip & Ring
Isolation Voltage, Pins (1, 2, 3, 4, 5, 6, 7) to (10, 11)
60 Seconds
-
-
Units
1.6 Test Circuits
Test Circuit 2: CYG2320 Receive Insertion Loss
Test Circuit 1: CYG2320 Transmit Insertion Loss
VT
Rm
560
LINE1
LINE2
RING
GND
OH
MUTE
VCC
+5V
VR
Rm
560
+VBATT
ILOOP
10H
+5V
TIP
VLT
+VBATT
ILOOP
TIP
10H
600
VLR
600
RING
RING
Transmit Insertion Loss = GTR = 20 Log
LINE1
LINE2
RING
GND
OH
MUTE
VCC
10H
VLT
Receive Insertion Loss = G RC = 20 Log
VT
AC
Source
10H
VR
V LR
-VBATT
-VBATT
1.7 CYG2320 Pinouts and Definitions
Pinouts
LINE 1 (PIN 1)
LINE 2
RING
GND
OH
Pin#
I/O
Name
1
I/O
LINE 1
Transformer isolated audio signal coupling path for the
telephone line.
2
I/O
LINE 2
Transformer isolated audio signal coupling path for the
telephone line.
3
O
RING
Active low indicates incoming ring signal. This is pulsed low by
the AC ring signal at the ring frequency.
4
I
GND
TIP
5
I
OH
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 470 resistor.
7
I
VCC
Provides power to the hook switch LED. Voltage is usually +5V
(for 8mA LED current). LED is current limited by an internal
470 resistor. VCC should not exceed 20V.
10
I/O
Ring
Connection to telephone line Ring conductor.
11
I/O
Tip
RING
Top View
3
Connected to host system ground.
Driving this pin low asserts the off-hook condition. The hook
switch LED is current limited by an internal 470 resistor.
MUTE
+VCC
Function
Connection to telephone line Tip conductor.
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CYG2320
INTEGRATED CIRCUITS DIVISION
2 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 CYG2320 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 Figure 2 and Figure 3 respectively.
Figure 1. MUTE and OH Timing
OH
MUTE
80ms
Figure 2.
Output Port
OH
µC
CYG2320
Output Port
MUTE
Figure 3.
Output Port
OH
80ms
One-Shot
µC
Output Port
CYG2320
MUTE
Asserting the MUTE pin causes the internal gyrator circuit in the CYG2320 to be bypassed, allowing low impedance
pulse dialing to be performed by pulsing the OH pin. In Figure 2, the micro-controller 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 who 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 multivibrator (one-shot) such as an NE555 timer that 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 chip sets. This pin is activated when an ATDP
command is issued to the modem.
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CYG2320
INTEGRATED CIRCUITS DIVISION
3 Manufacturing Information
3.1 Handling and Assembly Recommendations
The CYG2320 is not hermetically sealed, and should not be exposed to any liquid-based rinsing processes. IXYS
Integrated Circuits Division recommends two (2) approaches: (1) the modem should be installed in a wave-soldering
process that uses a no-clean soldering flux that will mostly evaporate during the normal wave-soldering processes,
(2) the modem should be soldered in by hand after the rest of the card is wave-soldered.
3.2 Reflow Profile
This product has a maximum solder temperature as shown below.
Device
Maximum Temperature
CYG2320
260°C
3.3 Mechanical Dimensions
3.3.1 CYG2320
1.91
(0.075)
27.18
(1.070)
10.16
(0.400)
21.59
(0.850)
LINE 1 (PIN 1)
3.43
(0.135)
LINE 2
RING
27.18
(1.070)
2.54
(0.100)
typ.
GND
OH
MUTE
VCC
0.634 SQ.
(0.025)
TYP.
TIP
RING
3.18
(0.125)
TOP VIEW
SIDE VIEW
1.09 DIA.
(0.043)
TYP.
PCB Pattern
(Top View)
Dimensions
mm
(inches)
For additional information please visit our website at: www.ixysic.com
IXYS Integrated Circuits Division 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 IXYS Integrated
Circuits Division’s Standard Terms and Conditions of Sale, IXYS Integrated Circuits Division 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 support or sustain life, or where malfunction of IXYS Integrated Circuits Division’s product may result in direct physical harm, injury, or death to a person or severe
property or environmental damage. IXYS Integrated Circuits Division reserves the right to discontinue or make changes to its products at any time without notice.
Specification: DS-CYG2320-R02
©Copyright 2012, IXYS Integrated Circuits Division
All rights reserved. Printed in USA.
12/19/2012
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