
January 2000 TOKO, Inc.
Page 1
TK10651
TK10651
FEATURES
I
Data and Voice Inputs
I
Data and Voice Outputs
I
Low Supply Current
I
Regulated Output
I
Wide Operating Voltage Range
I
Low Standby Current
I
Microphone Amplifier
I
IDC Circuit (Instantaneous Deviation Control)
APPLICATIONS
I
Portable Instrumentation
I
Cordless Telephones
I
Handy Talkies
I
Interphones
I
Amateur Radio Transceivers
LOW VOLTAGE COMPANDOR
DESCRIPTION
TK10651 is a noise reduction IC developed mainly for
cordless phones. It is also used for voice and data
communications. It has a built-in compressor circuit to
increase the average modulation level and an expander
circuit to reduce the noise level. The expander restores the
original dynamics of the input signal. The result is a high
quality signal transmission with low noise. Among the
many functions included, analog switching of the input and
output signal is particularly useful in cordless telephones.
Separate data input and output are provided. The audio
signal path can be muted during data transmission. The
signal path used for data transmission bypasses the com-
pressor and expander circuits.
The TK10651 is available in the SSOP-20 (MFP20)
surface mount package.
8
7
6
5
4
3
2
1
9
FILTER OUT
FILTER IN
COMP OUT
DATA IN
C-DFC
COMP RECT
COMP REF
COMP IN
COMP NF
GND
EXP IN
EXP NF
DATA OUT
EXP RECT
EXP OUT
VCC
THROUGH
EXP MUTE
EXP REF
COMP MUTE
10
11
12
13
14
15
16
17
18
19
20
TK10651
Tape/Reel Code
ORDERING INFORMATION
TAPE/REEL CODE
TL: Tape Left
Package Code
PACKAGE CODE
M: Surface Mount
10651M
T
+
E
C
C
D
COMP OUT
FILTER IN
FILTER OUT
COMP REF
GND
V
E
E
D
EXP NF
EXP IN
EXP RECT
COMP IN
COMP NF
COMP MUTE
INPUT AMP
+
TO Vref
100 k
MIC AMP
3.3 k
51 k
+
THSW
TO Vref
30 k
30 k
SUM
AMP
+
100 k
100 k
100 k
TO Vref
+
+
TO Vref
SUM
30 k
EXPANDER
THROUGH
SW
BUF
BLOCK DIAGRAM