ISO
2
-CMOS
A.C. Characteristics -
V
DD
=5.0V±5%
Characteristics
1
2
3
4
5
6
7
8
9
10
Crystal/Clock Frequency
Clock Input (OSC 1)
Rise Time
Fall Time
D
I
Duty Cycle
G
Clock Output (OSC 2)
I
Rise Time
T
A
Fall Time
L
Duty Cycle
t
LHCI
t
HLCI
DC
CI
t
LHCO
t
HLCO
DC
CO
C
LCO
F
C32
t
LH32
t
HL32
DC
32
C
L32
f
W
f
LT
f
HT
f
HT
/f
LT
t
LHWO
t
HLWO
DC
WO
V
TCC
f
MOD
V
TxO
V
TxO
t
LHTxDI
t
HLTxDI
f
Data
Z
IN
V
RxI
V
RxI
f
Data
2
100
100
100
40
50
60
40
2
50
400
3.0
225
7.935
352
1036
440
1295
7.945
390
1148
487
1434
1.25
500
500
50
V
DD
0.625
Modulated Frequency
M
O Output Level (TxO)
D Output Level (TxO)
U
variation vs. V
DD
L
A Transmit Data Input (TxDI)
Rise Time
T
O
Fall Time
R
Data Rate (TxDI)
Input Impedance (RxI)
Valid Input Level - Data (RxI)
Valid Input Level - Data + Voice
Receive Data Output (RxDO)
Rise Time
Fall Time
Capacitive Load
Duty Cycle
1.
2.
V
SS
=0V T=0 - 85°C (All voltages are referenced to V
SS
/GND)
MT8840
Sym
f
C
Min
Typ
Max
Unit
MHz
ns
ns
%
ns
ns
%
Test Conditions
OSC1, OSC2
10% - 90% of (V
DD
- V
SS
)
3.5759 3.5795 3.5831
100
100
40
50
100
100
50
30
32508
32541
100
100
50
100
7.955
428
1260
535
1574
32574
60
C
L
= 30pF, 3.58MHz ext.
clock to OSC1
Capacitive Load
I
11 / Clock Output (CK32)
12 O
Rise Time
13
14
15
16
17
Fall Time
Duty Cycle
Capacitive Load
Warbler Frequency (TCO)
pF
Hz
ns
ns
%
pF
Hz
Hz
Hz
Hz
Hz
fc = 3.5795MHz ± 0.1%
FATC = 0, f
c
= 3.5795MHz
FATC = V
DD
, f
c
= 3.5795MHz
FATC = 0, f
c
= 3.5795MHz
FATC = V
DD
, f
c
= 3.5795MHz
fc = 3.5795MHz
10% - 90% of (V
DD
- V
SS
)
C
L
= 100pF
Low Tone Frequency
T
18
O
19 N High Tone Frequency
20 E
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Harmonic Relationship
C
A Warbler Output (TCO)
Rise Time
L
L
Fall Time
E
Duty Cycle
R
Output Level (TCO)
ns
ns
%
V
pp
V
pp
Hz
270
100KΩ load to V
Ref
C
L
= 30pF, MTC = 0
MTC = 0
MTC = 1
(100KΩ load to V
Ref
)
32541
250
100
100
100
mV
pp
V
DD
= 5V
%
ns
ns
k/bits See Note 1
KΩ
V
pp
kbit/s
ns
ns
pF
%
10% - 90% of (V
DD
- V
SS
)
C
L
= 100pF
32 kHz Input Frequency
mV
pp
See Note 2
36 D
37 E
M
38 O
39 D
U
40 L
41 A
T
42 O
43 R
Notes:
All A.C. parameters are based on a typical data rate of 2 kbit/s.
Measured with no external resistor to DET input. Detection level internally set to 2.36V typical.
5-9
MITEL [ MITEL NETWORKS CORPORATION ]
