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參數(shù)資料
| 型號(hào)： | 935260690112 |
| 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)： | 56/56頁 |
| 文件大?。?/td> | 360K |
| 代理商： | 935260690112 |
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2000 May 19
9
Philips Semiconductors
Product specication
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
Internal supply (pin VCC)
The internal transmission part circuitry is supplied from
VCC. This supply voltage is derived from the voltage on
pin LN by means of resistor RCC and must be decoupled
by capacitor CVCC connected between pins VCC and GND.
This supply point may also be used to supply peripheral
circuits e.g. an electret microphone taking into account the
supply possibilities according to Fig.8.
The voltage VCC (see Fig.9) depends on the current
consumed by the transmission part and the peripheral
circuits:
VCC =VCC0 RCC × (IP +IREC)
where:
VCC0 =VLN ICC × RCC
IREC = the current consumed by the output stage of the
earpiece amplifier.
handbook, full pagewidth
FCA129
ringer-
interface/
peripherals
Rline
Iline
Rexch
Vexch
IP
RCC
supply
electret
microphone
4.7
F
CREG
220
F
CVDD
100
F
CVCC
ISLPE
RSLPE
20
REG
from preamp
SUPPLY TRANSMISSION PART
GND
VCC
VDD
SLPE
ISUP
IDD
ICC
LN
VDD
REGULATOR
DIALLER/
RINGER
UBA205xx
Fig.7 Supply configuration.
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