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MT8840AS Datasheet(PDF) 7 Page - Mitel Networks Corporation

Part # MT8840AS
Description  ISO2-CMOS Data Over Voice Modem
PDF  8 Pages
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Manufacturer  MITEL [Mitel Networks Corporation]
Direct Link  http://www.mitel.com
Logo MITEL - Mitel Networks Corporation

MT8840AS Datasheet(HTML) 7 Page - Mitel Networks Corporation

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ISO2-CMOS
MT8840
5-9
Notes:
1.
All A.C. parameters are based on a typical data rate of 2 kbit/s.
2.
Measured with no external resistor to DET input. Detection level internally set to 2.36V typical.
A.C. Characteristics - V
DD=5.0V±5% VSS=0V T=0 - 85°C (All voltages are referenced to VSS/GND)
Characteristics
Sym
Min
Typ
Max
Unit
Test Conditions
1
D
I
G
I
T
A
L
I
/
O
Crystal/Clock Frequency
fC
3.5759 3.5795 3.5831
MHz
OSC1, OSC2
2
Clock Input (OSC 1)
3
Rise Time
tLHCI
100
ns
10% - 90% of (VDD - VSS)
4
Fall Time
tHLCI
100
ns
5
Duty Cycle
DCCI
40
50
60
%
6
Clock Output (OSC 2)
7
Rise Time
tLHCO
100
ns
CL = 30pF, 3.58MHz ext.
8
Fall Time
tHLCO
100
ns
clock to OSC1
9
Duty Cycle
DCCO
50
%
10
Capacitive Load
CLCO
30
pF
11
Clock Output (CK32)
FC32
32508
32541
32574
Hz
fc = 3.5795MHz
12
Rise Time
tLH32
100
ns
10% - 90% of (VDD - VSS)
13
Fall Time
tHL32
100
ns
CL = 100pF
14
Duty Cycle
DC32
50
%
15
Capacitive Load
CL32
100
pF
16
T
O
N
E
C
A
L
L
E
R
Warbler Frequency (TCO)
fW
7.935
7.945
7.955
Hz
fc = 3.5795MHz ± 0.1%
17
Low Tone Frequency
fLT
352
390
428
Hz
FATC = 0, fc= 3.5795MHz
18
1036
1148
1260
Hz
FATC = VDD, fc= 3.5795MHz
19
High Tone Frequency
fHT
440
487
535
Hz
FATC = 0, fc= 3.5795MHz
20
1295
1434
1574
Hz
FATC = VDD, fc= 3.5795MHz
21
Harmonic Relationship
fHT/fLT
1.25
22
Warbler Output (TCO)
23
Rise Time
tLHWO
500
ns
100K
Ω load to V
Ref
24
Fall Time
tHLWO
500
ns
CL = 30pF, MTC = 0
25
Duty Cycle
DCWO
50
%
26
Output Level (TCO)
VTCC
VDD
Vpp
MTC = 0
27
0.625
Vpp
MTC = 1 (100K
Ω load to V
Ref)
28
M
O
D
U
L
A
T
O
R
Modulated Frequency
fMOD
32541
Hz
29
Output Level (TxO)
VTxO
225
250
270
mVpp VDD = 5V
30
Output Level (TxO)
31
variation vs. VDD
VTxO
100
%
32
Transmit Data Input (TxDI)
33
Rise Time
tLHTxDI
100
ns
34
Fall Time
tHLTxDI
100
ns
35
Data Rate (TxDI)
fData
2
k/bits See Note 1
36
D
E
M
O
D
U
L
A
T
O
R
Input Impedance (RxI)
ZIN
50
K
Ω
32 kHz Input Frequency
37
Valid Input Level - Data (RxI)
VRxI
40
400
mVpp See Note 2
38
Valid Input Level - Data + Voice
VRxI
3.0
Vpp
39
Receive Data Output (RxDO)
fData
2
kbit/s
40
Rise Time
100
ns
10% - 90% of (VDD - VSS)
41
Fall Time
100
ns
CL = 100pF
42
Capacitive Load
100
pF
43
Duty Cycle
40
50
60
%



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