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Set Top Box
System Block Diagram
 
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Major Promotion Products
Block Semiconductor Recommendation Remarks
System
Control 		CPU SH4 series SH7750/7751  
Power Supply Shunt Regulater HA17431VLP  
Comparator HA17393A  
Common Zener Diode HZC6.2/6.8,HZM6.2ZWA
HZC3.0 etc		 Surge Absorption
SW Diode HSC119,HSM2838C etc  
Built in resistance TRS BRT series(MPAK,CMPAK,TO92)  
Small Signal TRS 2SA1052,2SC2462,2SC4265 etc  
Uni Logic LV2G04AUS,ALVC1G04VS  
OP Amp HA17358A  
UP/Down
Tunner 		ATT Pin Diode HVB14S or HVB187YP  
Tuning Varicap Diode HVC202B  
U Converter Schottky Barrier Diode HSC88 Detector & Mixer
Wide band
amplifier		 High Frequency TRS 2SC5631  
OSC buffer 2SC5555  
OSC 2SC5757  
1st IF 2SC5594  
2nd IF 2SC5772  
Modem
Tuner 		ATT PIN Diode HVB14S or HVB187YP  
Band switch SW Diode HSC277  
UHF tuning Varicap Diiode HVC202B  
VHF tuning HVC300B,HVC306B
HVC363B 		 
Wide band
amplifier		 High Frequency TRS 2SC5773 or 2SC5631  
IF AMP 2SC5772  
UHF RF BB503M or BB504M  
VHF RF BB304M or BB305M