uba2051t NXP Semiconductors, uba2051t Datasheet - Page 41

• Manufacturer Part Number: uba2051t
• Description: Uba2050 A ; Uba2051 A;c One-chip Telephone Ics With Speech, Dialler And Ringer Functions
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2000 May 19
handbook, full pagewidth
One-chip telephone ICs with speech,
dialler and ringer functions
Voltage gain defined as G
Receive and earpiece gains: S1 = open.
Inputs not being tested should be open-circuit.
Only pins common to UBA205xx are represented. Pin R4 must be open-circuit.
I line
600
Z line
100
F
220
nF
v
= 20 log
Fig.33 Test circuit for defining receive gains and DTMF dialling levels.
V I
R DTMF1
C DTMF
100 nF
20 k
I line
V
------ -
V
O
I
; V
O
R DTMF2
2.74 k
= V
IR
DP/FL
MIC
MIC
MDY/TONE
DTMF
QR
CE/CSI
or V
RX
REG
.
C REG
4.7 F
V LN
LN
AGC SLPE
C2 C3 R2 R3 R4
41
UBA205xx
619
R CC
R SLPE
20
GND
C1
UBA2050(A); UBA2051(A;C)
V CC
S1
3.58 MHz
R1
I CC
X1
V DD
XTAL
CE/FDI
GAR
QR
RX
I DD
220 F C
C VDD
R GAR
R E1
100 k
100 F
VCC
Product specification
R L2
10 k
100 nF
C GARS
V QR
C GAR
C ear
R L1
FCA136