參數(shù)資料
型號(hào)： 935260690118
廠商： NXP SEMICONDUCTORS
元件分類： 無繩電話/電話
英文描述： TELEPHONE MULTIFUNCTION CKT, PDSO28
封裝： PLASTIC, SOT-136, SO-28
文件頁數(shù)： 18/56頁
文件大小： 360K
代理商： 935260690118
2000 May 19
25
Philips Semiconductors
Product specication
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
Table 6
Digits keypad activation and corresponding
DTMF frequency pairs
Resistor options
The resistors are connected between the pins of the
keyboard (C1 to C3 and R1 to R4) and pin GND. One
resistor connection is shown in Fig.26. The resistor
options are read after each reset of the dialler.
DIGIT
KEYS
GENERATED DTMF
FREQUENCIES
NUMBER
OF
PULSES
fL (Hz)
fH (Hz)
[0]
941
1336
10
[1]
697
1209
1
[2]
697
1336
2
[3]
697
1477
3
[4]
770
1209
4
[5]
770
1336
5
[6]
770
1477
6
[7]
852
1209
7
[8]
852
1336
8
[9]
852
1477
9
[#]
941
1477
[
/T]
941
1209
handbook, halfpage
MGT048
R1
MBS
Fig.26 Resistor connection.
Table 7
Resistor functions
Notes
1. On = option resistor present; off = option resistor not present.
2. Pin C3 belongs to resistor option FTSB.
RESISTOR
TO PIN
FUNCTION
CONDITIONS
ON(1)
OFF(1)
FTSA
C2
ash time select
FTSB = off;
note 2
300 ms
98 ms
FTSB = on;
note 2
80 ms
600 ms
MMS
C1
[
/T] key denition
[/T] becomes [] [/T] becomes [P → T]
MBS
R1
make/break ratio select
33/66
40/60
APT
R2
access pause time select
3.6 s
2.0 s
PPS
R3
pulses per second
20 pps
10 pps
PTS
R4
pulse/tone select
pulse mode
DTMF mode
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