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參數(shù)資料
| 型號： | UBA2051T |
| 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(shù)： | 9/52頁 |
| 文件大小： | 292K |
| 代理商： | UBA2051T |
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2000 May 19
9
Philips Semiconductors
Product specification
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
Internal supply (pin V
CC
)
The internal transmission part circuitry is supplied from
V
CC
. This supply voltage is derived from the voltage on
pin LN by means of resistor R
CC
and must be decoupled
by capacitor C
VCC
connected between pins V
CC
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 V
CC
(see Fig.9) depends on the current
consumed by the transmission part and the peripheral
circuits:
V
CC
= V
CC0
R
CC
×
(I
P
+ I
REC
)
where:
V
CC0
= V
LN
I
CC
×
R
CC
I
REC
= 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
μ
F
CREG
220
μ
F
CVDD
100
μ
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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