UTC 7642 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
1
QW-R110-015,A
ONE CHIP AM RADIO CIRCUIT
DESCRIPTION
UTC 7642 is suitable for low voltage portable Radio,
cassette system and other wireless AM system. The package
of UTC7642 is TO-92.
FEATURE
*Low operating voltage: Down to V
CC
=1.3V
*Low Quiescent Current:I
CCO
=0.2mA
*Low external component required.
TO-92
1
EQUIVALENT CIRCUIT
2
T1
T2
T3
R1
5.6K
C1
12pF
R2
3.3K
R5
12K
R4
12K
C2
12pF
R3
12K
R6
12K
T4
T5
T6
T7
T8
T9
T10
R9
12K
R7
12K
R8
12K
R11
12K
R10
12K
C4
23pF
R13
12K
R12
12K
R14
74.6
R15
12K
3
1
ABSOLUTE MAXIMUM RATINGS
(Tested at Ta=25
C, unless otherwise specified)
PARAMETERS
SYMBOLS
MIN.
MAX.
UNIT
Supply Voltage
V
CC
6
V
Operating Temperature
Topr
-10
60
C
Storage temperature
T
STG
-55
150
C
UTC 7642 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
2
QW-R110-015,A
ELECTRICAL CHARACTERISTICS
(Tested at Ta=25
C, V
CC
=1.3V,fm=1KHZ,f
O
=1MHZ,MOD=30%, unless other specified)
PARAMETERS
SYMBOLS TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply Voltage
V
CC
1.2
1.3
1.6
V
Quiescent Current
I
CCQ
V
I
=0
0.14
0.20
0.30
mA
Input Resistance
R
I
-
3
-
M
Maximum Sensitivity
SM
V
OD
=3mV
-
600
-
V
Detector Output Voltage
V
OD
V
I
=10mV
5
15
30
mV
The Range of AGC
A
-
30
-
dB
TEST CIRCUIT
Vin
UTC 7642
2
3
1
100k
RAGC
1.5k
0.1
F
0.01
F
75
Vout
Vcc
APPLICATION CIRCUIT
UTC 7642
2
3
1
600
H
140pF
7pF
100k
RAGC 1k
0.01
F
0.15
F
0.1
F
1k
32
820
7.5k
57
1.5V
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