mt88ebnr Zarlink Semiconductor, mt88ebnr Datasheet - Page 26

• Manufacturer Part Number: mt88ebnr
• Description: 4-wire Calling Number Identification Circuit 2 4-wire Cnic2 Semiconductor Inc
• Manufacturer: Zarlink Semiconductor

Notes:
1) The total recognition time is t
2) The total tone absent time is t
3) By choosing t
4) SIN227 specifies that the AC and DC loads should be removed between 50-150ms after the end of the FSK signal, indicated by CD
5) The MT88E45B should be taken out of FSK mode when FSK is not expected to prevent the FSK demodulator from reacting to other
6) PWDN, Tip/Ring CASen, FSKen are internal signals decoded from CB0/1/2.
7) This signal represents the mode of the DR/STD pin.
PWDN
Note 6
Tip/Ring
CASen
Note 6
EST
Note 7
FSKen
Note 6
A/B Wires
ST/GT
STD
TE DC load
TE AC load
DR
DCLK
DATA
OSC2
Note 7
CD
is the comparator threshold (refer to Figure 55 for details).
is the comparator threshold (refer to Figure 55 for details).
edge.
returning to high. The MT88E45B may also be powered down at this time.
in-band signals such as speech, DT-AS/CAS and DTMF tones.
Note 1
Line Reversal
GA
Figure 17 - Application Timing for BT Caller Display Service (CDS), e.g., CLIP
t
=15ms, t
‘Idle State Tone Alert Signal’
t
DP
A
REC
t
GP
<120 Aµ
t
PU
DT-AS
ABS
20 5ms
15 1ms
B
will be 15-25ms so that the current wetting pulse and AC load can be applied right after the STD rising
REC
ABS
= t
= t
GP
GA
C
+ t
V
t
t
+ t
DA
t
ABS Note 3
TGt
GA
DP ,
Current wetting pulse (see SIN227)
DA ,
where t
where t
Ch. seizure
..101010..
Zss (Refer to SIN227)
Zarlink Semiconductor Inc.
t
D
CP
GP
GA
MT88E45
is the tone present guard time and t
is the tone absent guard time and t
Note 2
< 0.5mA (optional)
26
Mark
E
Data
Data
F
t
t
CA
PD
DP
DA
Note 4
is the tone present detect time. V
is the tone absent detect time. V
G
Note 4
Note 5
A
B = 88-110 ms
C
D = 80-262 ms
E = 45-75 ms
F
G > 200 ms
Note:
obtained from SIN227
Issue 1
50-150ms
100 ms
2.5sec (typ. 500 ms)
45 ms (up to 5sec)
Ring
All
Data Sheet
values
TGt
TGt