Calling Line Identifier
MX602 - PRELIMINARY INFORMATION
22
Mute decision point T1 = 0 (no hold-off)
T3, minimum valid DET pulse width
Start Timer
< 5ms between the falling edge of the DET
and FSK Mode selection.
DET pulse width (TDET
must be > T3 or < 65ms
to be considered a
valid DET
)
TDET
50ms
DET monitored for 50ms
after mode change
DET
Not a valid CIDCW transaction
sequence at this point
T2, time for muting
to take affect
MUTE
Should a DET pulse occur during
the 50ms DET monitoring, the pulse
will last a minimum of 8ms
TONE / FSK
MODE
No Signal
CAS
NEAR END
VOICE
FAR END
VOICE
Note: The actual signal received by the MX602 is the sum of the CAS, Near-End Voice, and Far-End Voice signals.
Figure 26: Invalid CIDCW Transaction Initiation Telephone Set Timing Sequence (DET output goes high during
50ms quiet period)
6. Performance Specification
6.1 Electrical Performance
Absolute Maximum Ratings
Exceeding these maximum ratings can result in damage to the device.
Min.
-0.3
-0.3
-30
Max.
Units
V
Supply (V
- VSS)
7.0
DD
Voltage on any pin to VSS
V
+ 0.3
V
DD
Current into or out of V and VSS pins
30
20
mA
mA
DD
Current into or out of any other pin
-20
DW /DIP Package
Total Allowable Power Dissipation at T
Derating above 25°C°
= 25°C
800
13
mW
AMB
mW/°C above 25°C
Storage Temperature
-55
-40
125
85
°C
°C
Operating Temperature
Operating Limits
Correct operation of the device outside these limits is not implied.
Notes
Min.
Max.
Units
V
Supply (V - VSS)
3.0
-40
5.5
85
DD
Operating Temperature
Xtal frequency
°C
1
3.575965
3.583125
MHz
Operating Limits Notes:
1. A Xtal frequency of 3.579545MHz ±0.1% is required for correct Tone Alert and FSK detection.
© 1998 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 336 744-5050 Fax: 336 744-5054
Doc. # 20480136.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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