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ST7537 Datasheet(PDF) 7 Page - STMicroelectronics |
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ST7537 Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 9 page FILTER TEMPLATES Receive and Transmit Filter Intermediate FrequencyFilter Frequency (kHz) Gain (dB) Frequency (kHz) Gain (dB) Min. Typ. Max. Min. Typ. Max. 92 - 30 2.4 - 35 126.45 - 5 - 3 - 2 4.3 - 4 - 3 - 1 Ref 132.45 0 Ref 5.4 0 138.45 - 5 - 3 - 2 6.5 - 5 - 3 - 2 180 - 30 11.6 - 35 APPLICATION SCHEMATIC INFORMATIONS RESISTORS CAPACITORS R1 180 Ω C1 1 µF Ceramic 50 R2 2.2 Ω C2 470nF Paper, class X2 R3 2.2 Ω C3 (2) 22pF 10% Ceramic 10V R4 2.2 Ω C4 (2) 22pF 10% Ceramic 10V R5 2.2 Ω C5 100nF 10% Ceramic 10V R6 180 Ω C6 6.8nF 5% Plastic Film 50V R7 47k Ω C7 100nF Ceramic 10V R8 1k Ω C8 2.2 µF R9 1k Ω 5% C9 100nF Ceramic 10V R11 47k Ω C10 2.2 µF INDUCTOR C11 (1) 100nF Ceramic 10V L1 10 µH ≅ 1.5Ω C12 (1) 100nF Ceramic 10V TRANSISTORS TRANSIL Q1 : 2N2907 Q2 : 2N2222 Q3 : 2N2222 Q4 : 2N2907 Q5 : 2N2907 Q6 : 2N2222 TRL1 : SGS-THOMSON P6KE6V8CP TRANSFORMER TR1 : TOKO T1002 N CRYSTAL QTZ1 : 11.0592MHz parallel resonance Notes : 1. These capacitors might not be necessary if the overall power supplies decoupling is sufficient. 2. The value of these capacitors depends on the crystal parameters. ST7537HS1 7/9 |
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