MT8880C
Data Sheet
AC Electrical Characteristics† - Voltages are with respect to ground (VSS) unless otherwise stated. fC=3.579545 MHz.
Characteristics
Sym.
Min.
Typ.‡ Max.
Units
Notes*
1
2
3
4
5
6
7
Positive twist accept
Negative twist accept
Freq. deviation accept
Freq. deviation reject
Third tone tolerance
Noise tolerance
8
8
dB
dB
2,3,6,9
2,3,6,9
2,3,5,9
2,3,5
±1.5%±2Hz
±3.5%
R
X
-16
-12
22
dB
dB
dB
2,3,4,5,9,10
2,3,4,5,7,9,10
2,3,4,5,8,9,11
Dial tone tolerance
† Characteristics are over recommended operating conditions unless otherwise stated.
‡ Typical figures are at 25°C, VDD = 5 V, and for design aid only: not guaranteed and not subject to production testing.
* See “Notes” following AC Electrical Characteristics Tables.
AC Electrical Characteristics† - Call Progress - Voltages are with respect to ground (VSS) unless otherwise stated.
Characteristics
Sym.
Min.
Typ.‡
Max.
Units
Notes*
@ -25 dBm
1
2
3
4
5
Lower freq. (ACCEPT)
Upper freq. (ACCEPT)
Lower freq. (REJECT)
Upper freq. (REJECT)
fLA
fHA
fLR
fHR
320
510
290
540
Hz
Hz
@ -25 dBm
@ -25 dBm
@ -25 dBm
Hz
Hz
Call progress tone detect level
(total power)
-30
dBm
† Characteristics are over recommended operating conditions unless otherwise stated
‡ Typical figures are at 25°C, VDD = 5 V, and for design aid only: not guaranteed and not subject to production testing
* See “Notes” AC Electrical Characteristics Tables
AC Electrical Characteristics† - Voltages are with respect to ground (VSS) unless otherwise stated.
Characteristics
Tone present detect time
Sym.
Min. Typ.‡ Max. Units
Conditions
1
2
tDP
tDA
3
11
4
14
8.5
40
ms
ms
ms
ms
ms
ms
µs
Note 12
Tone absent detect time
Tone duration accept
0.5
Note 12
3
tREC
tREC
tID
User adjustable#
User adjustable#
User adjustable#
User adjustable#
See figure 9
4
Tone duration reject
20
20
R
X
5
Minimum interdigit pause duration
Maximum tone drop-out duration
Delay St to b3
40
6
tDO
7
tPStb3
tPStRX
tBST
tPS
13
8
8
Delay St to RX0-RX3
µs
See figure 9
9
Tone burst duration
50
50
52
52
ms
ms
ms
ms
DTMF mode
DTMF mode
Call Progress mode
Call Progress mode
10
11
12
Tone pause duration
T
X
Tone burst duration (extended)
Tone pause duration (extended)
tBSTE
tPSE
100
100
104
104
20
Zarlink Semiconductor Inc.
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