CMX644AD2 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX644AD2' PDF : 31 Pages View PDF
Bell 212A / V.22 Modem with Call Progress and DTMF
27
CMX644A Preliminary Information
6.1.3 Operating Characteristics
For the following conditions unless otherwise specified:
VDD = 2.7V at TAMB = 25°C and VDD = 3.0V to 5.5V at TAMB = -40 to 85°C.
0dBm corresponds to 775mVRMS.
DC Parameters
IDD (‘Zero Power’)
IDD (Operating at VDD = 3.0V)
IDD (Operating at VDD = 3.0V)
with equalization enabled
Logic ‘1’ Input Level
Logic ‘0’ Input Level
Logic Input Leakage Current (VIN = 0 to
VDD), (excluding XTAL/CLOCK input)
Output Logic ‘1’ Level (IOH = 360µA)
Output Logic ‘0’ Level (IOL = 360µA)
IRQ output ‘Off’ State Current
(VOUT = VDD)
Schmitt trigger input high-going threshold
(VtHI) (see Figure 14)
Schmitt trigger input low-going threshold
(VtLO) (See Figure 14)
Relay Driver pull-down on resistance
(VDD = 5.0V, 50mA maximum load current)
Xtal/Clock Input
Pulse Width (‘High’ or ‘Low’)
Input impedance (at 100Hz)
Gain (input = 1mVRMS at 1kHz)
AC Parameters
Transmitter (at TX pin)
Guard Tones
Level (below PSK) of 550Hz
Level (below PSK) of 1800Hz
Frequency Accuracy
PSK Output
Transmitted level
Distortion
DTMF Output
Transmitted level: high group
Twist (high group - low group levels)
Distortion
Frequency Accuracy
Notes
2
2
2
5
5
3
1, 4, 8
1, 4
4
Min.
70%
-1.0
VDD -0.4
0.56VDD
0.44VDD -0.6V
40
10
20
-0.25
-3.0
-2.0
-0.25
Typ.
1
3.2
37.0
-3.0
-6.0
-2.0
2.0
-1.0
2.0
2.0
Max.
4.0
4.6
-
30%
1.0
0.4
1.0
0.56VDD+0.6V
0.44VDD
+0.25
-1.0
5.0
0
5
+0.25
Units
µA
mA
mA
VDD
VDD
µA
V
V
µA
V
V
Ω
ns
MΩ
dB
dB
dB
%
dBm
%
dBm
dB
%
%
2000 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480197.006
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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