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參數資料
| 型號： | UBA2051AT |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | One-chip telephone ICs with speech, dialler and ringer functions |
| 中文描述： | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 封裝： | PLASTIC, SOT-136, SO-28 |
| 文件頁數： | 25/52頁 |
| 文件大?。?/td> | 292K |
| 代理商： | UBA2051AT |
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2000 May 19
25
Philips Semiconductors
Product specification
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
f
L
(Hz)
941
697
697
697
770
770
770
852
852
852
941
941
f
H
(Hz)
1336
1209
1336
1477
1209
1336
1477
1209
1336
1477
1477
1209
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[#]
[
/T]
10
1
2
3
4
5
6
7
8
9
handbook, halfpage
MGT048
R1
MBS
Fig.26 Resistor connection.
Table 7
Resistor functions
Notes
1.
2.
On = option resistor present; off = option resistor not present.
Pin C3 belongs to resistor option FTSB.
RESISTOR
TO PIN
FUNCTION
CONDITIONS
ON
(1)
OFF
(1)
FTSA
C2
flash time select
FTSB = off;
note 2
FTSB = on;
note 2
300 ms
98 ms
80 ms
600 ms
MMS
MBS
APT
PPS
PTS
C1
R1
R2
R3
R4
[
/T] key definition
make/break ratio select
access pause time select
pulses per second
pulse/tone select
[
/T] becomes [
]
33/66
3.6 s
20 pps
pulse mode
[
/T] becomes [P
→
T]
40/60
2.0 s
10 pps
DTMF mode
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