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 1 *Low operating voltage: Down to VCC=1.3V *Low Quiescent Current:ICCO=0.2mA *Low external component required. TO-92 EQUIVALENT CIRCUIT 3 R3 12KΩ 2 T1 C1 12pF R5 12KΩ R4 12KΩ R6 12KΩ R11 12KΩ R13 12KΩ R15 C4 12KΩ 23pF C2 12pF R7 12KΩ T4 R2 3.3KΩ R10 12KΩ R14 74.6Ω R12 12KΩ T10 R8 12KΩ R1 5.6KΩ T2 R9 12KΩ T5 T7 T6 T8 T9 T3 1 ABSOLUTE MAXIMUM RATINGS (Tested at Ta=25°C, unless otherwise specified) PARAMETERS Supply Voltage SYMBOLS MIN. VCC MAX. UNIT 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 Supply Voltage VCC Quiescent Current ICCQ TEST CONDITIONS MIN. TYP. MAX. 1.2 1.3 1.6 UNIT V VI=0 0.14 0.20 0.30 mA MΩ Input Resistance RI - 3 - 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 RAGC 1.5kΩ 100kΩ Vcc 0.01 µF 2 UTC 7642 3 1 75 Ω Vin Vout 0.1 µF APPLICATION CIRCUIT RAGC 1kΩ 7.5kΩ 100kΩ 57Ω 820Ω 600 µH 140pF 2 1.5V UTC 7642 3 0.1 µF 1 7pF 0.15 µF 1kΩ 32Ω 0.01 µF UTC UNISONIC TECHNOLOGIES CO. LTD 2 QW-R110-015,A