參數(shù)資料
型號(hào)： 935260687118
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)： 11/56頁
文件大小： 360K
代理商： 935260687118
2000 May 19
19
Philips Semiconductors
Product specication
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
Table 3
Ringer melodies
NAME
FREQUENCIES (Hz)
DURATION (ms)
Bell 1 (default)
770 + 943 + 1341
28 + 28 + 28
Bell 2
852 + 943 + 1206
28 + 28 + 28
Bell 3
943 + 1206 + 1341
28 + 28 + 28
Bell 4
1206 + 1341 + 1482
28 + 28 + 28
handbook, full pagewidth
CE/FDI
MDY/TONE
MGT050
VDD
GND
sample
time
sync
time
Fig.19 Ringer frequency detection.
PULSE DIALLER (PINS DP/FL, DMO AND LED)
The pulse dialling system uses line current interruptions to
signal the digits dialled to the exchange. The number of
line current interruptions corresponds to the digit dialled
except for the digit [0] which is characterized by
10 interruptions. After each digit there is an inter-digit
pause time (tidp).
When dialling, the transmission part is muted.
The
[/T] key definition, the dialling mode, the make/break
ratio, repetition rate (pulse dialling), the flash time and the
access pause time depend on the resistor options: MMS,
PTS, MBS, PPS, FTSA, FTSB and APT (see Fig.25 and
Table 7).
Valid keys are the digits [0] to [9], [R], [LNR/P], [P
→ T]
and [
/T] (when MMS resistor option is off).
To allow start-up from CVDD discharged, no ESD diode is
implemented between pin DP/FL and pin VDD.
Pin DP/FL is an open-drain output and is set HIGH (via an
external pull-up resistor) when VDD <VPOR.
Pin DMO of the UBA205x is used to enable external
hardware (see Fig.37) which decreases the DC voltage
over the A and B network exchange terminals during pulse
dialling. Several countries require this feature. Pin DMO is
a push-pull output and is LOW when VDD <VPOR.
Figure 20 shows the timing diagram in pulse dialling mode
for the UBA205x when keys [3], [3], [LNR/P] and [4] are
pressed.
Figure 20 is also valid for the UBA2051C, with the
exception of the DMO signal.
In pulse dialling mode, pin LED of the UBA205xA is set
LOW after off-hook and becomes HIGH when the first
DTMF code is sent after switching over to DTMF dialling.
Pin LED is a push-pull output and is LOW when
VDD <VPOR.
Figure 21 shows the timing diagram in pulse dialling mode
for the UBA205xA when keys [3], [3], [P
→ T] and [4] are
pressed.
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