U4089B-PFN ATMEL [ATMEL Corporation], U4089B-PFN Datasheet - Page 2

• Manufacturer Part Number: U4089B-PFN
• Description: Monolithic Integrated Feature Phone Circuit
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 1. Simple Block Diagram
Figure 2. Block Diagram
2
ATAFS
TSACL
INLDR
INLDT
DTMF
TTXA
TLDR
TLDT
MIC1
MIC2
SAO
U4089B-P
SAI
11
4
3
1
41
27
26
29
28
25
21
23
MIC
suppression
Acoustical
SACL
feedback
control
GSA
22
ACL
TX
Transmit
control
44
MUTX
mute
GT
24
TXA
Speech
switch
circuit
Voice
RECO
32
39
STO
7
GR
V
L
40
600
900
amplifier
Audio
Impedance
control
IMPSEL
20
30
control
AGA IND
AGA
Dialer
6
STI
36
SENSE V
9
Supply
10
attenuation
B
Current
RECIN
supply
supply
Power
R-
42
13
V
MP
31
33
8
4518A–CORD–05/02
V
GND
I
REF
M