UTC UTC7642 Datasheet
UTC 7642 LINEAR INTEGRATED CIRCUIT
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 VCC=1.3V
*Low Quiescent Current:ICCO=0.2mA
*Low external component required.
1
EQUIVALENT CIRCUIT
R3
12KΩ
2
T1
12pF
R1
5.6KΩ
T2
R4
C1
12KΩ
R2
3.3KΩ
T3
T4
R5
12KΩ
C2
12pF
R6
12KΩ
R7
12KΩ
12KΩ
T5 T6
R9
12KΩ
R8
R10
12KΩ
R11
12KΩ
R13
12KΩ
R12
Ω
12K
T7
R15
C4
12KΩ
23pF
R14
74.6Ω
T8 T9
T10
TO-92
3
1
ABSOLUTE MAXIMUM RATINGS (Tested at Ta=25°C, unless otherwise specified)
PARAMETERS SYMBOLS MIN. MAX. UNIT
Supply Voltage VCC 6 V
Operating Temperature Topr -10 60 °C
Storage temperature TSTG -55 150 °C
UTC UNISONIC TECHNOLOGIES CO. LTD
1
QW-R110-015,A
UTC 7642 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Tested at Ta=25°C, VCC=1.3V,fm=1KHZ,fO=1MHZ,MOD=30%, unless other specified)
PARAMETERS SYMBOLS TEST CONDITIONS MIN. TYP. MAX. UNIT
Supply Voltage VCC 1.2 1.3 1.6 V
Quiescent Current ICCQ VI=0 0.14 0.20 0.30 mA
Input Resistance RI - 3 - MΩ
Maximum Sensitivity SM VOD=3mV - 600 - µV
Detector Output Voltage VOD VI=10mV 5 15 30 mV
The Range of AGC ∆A - 30 - dB
TEST CIRCUIT
Vin
APPLICATION CIRCUIT
600 µH
140pF 7pF
0.01 µF
75 Ω
0.01 µF
100kΩ
UTC 76422 3
1
100kΩ
UTC 76422 3
1
0.15 µF
RAGC
1.5kΩ
0.1 µF
RAGC 1kΩ
820Ω
0.1 µF
Vcc
Vout
Ω
57
7.5kΩ
1.5V
1k
32Ω
Ω
UTC UNISONIC TECHNOLOGIES CO. LTD
2
QW-R110-015,A
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