- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄24800 > 935260608118 (NXP SEMICONDUCTORS) TELEPHONE MULTIFUNCTION CKT, PDSO28 PDF資料下載
參數(shù)資料
| 型號： | 935260608118 |
| 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)： | 55/56頁 |
| 文件大小： | 360K |
| 代理商： | 935260608118 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁當(dāng)前第55頁第56頁
2000 May 19
8
Philips Semiconductors
Product specication
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
FUNCTIONAL DESCRIPTION
The values given in the functional description are typical
values unless otherwise specified.
For numbering of components, refer to Figs 7, 37 and 38.
Voltage levels are referenced to the negative line terminal
GND, except when otherwise specified.
Speech/transmission part
SUPPLY
The supply for the IC and its peripheral circuits is obtained
from the telephone line (see Fig.7).
Line interface (pins LN, SLPE and REG)
The IC generates a stabilized reference voltage Vref
between pins LN and SLPE. This reference voltage is
4.15 V, is temperature compensated and can be adjusted
by means of an external resistor RVA.
The reference voltage can be increased by connecting the
resistor RVA between pins REG and SLPE or decreased by
connecting the resistor RVA between pins REG and LN.
The voltage at pin REG is used by the internal regulator to
generate Vref and is decoupled by capacitor CREG
connected between pins REG and GND. This capacitor,
converted into an equivalent inductance (see Section “Set
impedance”), realizes the set impedance conversion from
its DC value (RSLPE) to its AC value (RCC in the audio
frequency range).
The voltage at pin SLPE is proportional to the line current,
and the voltage VLN at pin LN can be calculated as follows:
VLN =Vref +RSLPE × ISLPE
ISLPE =Iline ICC IP ISUP
where:
Iline = line current
ICC = internal current consumption
IP = supply current for peripheral circuits
ISUP = current consumed by the VDD regulator from
pin LN.
Resistor RSLPE is an external resistor connected between
pins SLPE and GND. The preferred value for RSLPE is
20
. Changing the value of RSLPE will affect more than
the DC characteristics: it also influences the microphone
and DTMF gains, the gain control characteristics, the
sidetone level and the maximum output swing on the line.
The DC current flowing into the set is determined by the
exchange supply voltage (Vexch), the feeding bridge
resistance (Rexch), the DC resistance of the telephone line
(Rline) and the reference voltage (Vref). The excess current
is shunted via pin LN to pin SLPE when the line current
(Iline) is greater than the sum of the supply current of the
speech/transmission part (ICC), the current drawn by the
peripheral circuitry connected to VCC (IP) and the input
current of the VDD regulator (ISUP). With line currents below
Ilow (9 mA), the internal reference voltage (generating Vref)
is automatically adjusted to a lower value.
This means that more sets can operate in parallel with
DC line voltages (excluding the polarity guard) down to an
absolute minimum voltage of 1.45 V. At line currents
below Ilow, the circuit has limited sending and receiving
levels. This is called the low voltage area.
handbook, halfpage
LN
SLPE
REG
IR
AGC
DTMF
VDD
XTAL
KT
CE/CSI
CE/FDI
C4
MDY/TONE
VCC
MIC
MIC
+
RX
QR
GND
GAR
R1
R2
R3
R4
C1
C2
C3
1
2
3
4
5
6
7
8
9
10
11
12
13
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
UBA2051CT
FCA128
DP/FL
Fig.6 Pin configuration (UBA2051CT).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 935260687112 | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 935260687118 | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 935260607112 | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 935260607118 | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 935260690112 | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 935261069122 | 制造商:NXP Semiconductors 功能描述:IC SECURITY TRANSPONDER PLLMC |
| 935262025112 | 制造商:NXP Semiconductors 功能描述:SUB ONLY IC |
| 935262217118 | 制造商:NXP Semiconductors 功能描述:Real Time Clock Serial 8-Pin SO T/R |
| 935264217557 | 制造商:NXP Semiconductors 功能描述:SUB ONLY IC |
| 935267356112 | 制造商:NXP Semiconductors 功能描述:IC TEA1507PN |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。