MT88E45
Advance Information
AC Electrical Characteristics† - CAS Detection Timing
Characteristics
Sym
Min
Max
Units
Notes
1
2
Tone present detect time
Tone absent detect time
t
0.5
0.1
10
8
ms
ms
See Figures 16, 17
See Figures 16, 17
DP
t
DA
† AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
AC Electrical Characteristics† - 3-Wire Interface Timing
Characteristics
Power-up time
Sym
Min
Max
Units
Notes
1
2
3
4
5
t
50
10
25
ms
ms
ms
ms
ms
PU
OSC2
CD
Power-down time
t
PD
Input FSK to CD low delay
Input FSK to CD high delay
Hysteresis
tCP
tCA
10
10
† AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
AC Electrical Characteristics† - 3-Wire Interface Timing (Mode 0)
‡
Characteristics
Rise time
Sym
Min
Typ
Max
Units
Notes*
1
2
3
4
5
tRR
tRF
tRL
200
200
417
1212
5
ns
ns
into 50pF Load
DR/STD
DATA
Fall time
Low time
Rate
into 50pF Load
415
416
1200
1
µs
2
1
1188
baud
ms
Input FSK to DATA
delay
tIDD
6
7
Rise time
tR
tF
200
200
ns
ns
µs
µs
Hz
µs
µs
µs
into 50pF Load
Fall time
into 50pF Load
DATA
DCLK
8
DATA to DCLK delay
DCLK to DATA delay
Frequency
tDCD
tCDD
6
6
416
416
1, 2, 3
9
1, 2, 3
10
11
12
13
f
1201.6
415
415
415
1202.8
416
1204
417
417
417
2
2
2
2
DCLK0
DCLK
High time
tCH
Low time
tCL
416
DCLK
DR/STD
DCLK to DR delay
tCRD
416
† AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
o
‡ Typical figures are at 25 C and are for design aid only: not guaranteed and not subject to production testing.
*Notes:
1. FSK input data at 1200 ±12 baud.
2. OSC1 at 3.579545 MHz ±0.1%.
3. Function of signal condition.
18
MITEL [ MITEL NETWORKS CORPORATION ]
