SN761667

www.ti.com FEATURES Integrated Mixer/Oscillator/PLL and IF GCA VHF-L, VHF-H, UHF Three-Band Local Oscillator RF AGC Detector Circuit I2C Bus Protocol Bidirectional Data Transmission High-Voltage Tuning Voltage Output Four NPN-Type Band-Switch Drivers One Auxiliary Port/5-Level ADC Crystal Oscillator Output Programmable Reference Divider Ratio (24/28/50/64/80/128) Low Distortion IF Gain Controlled Amplifier Standby Mode 5-V Power Supply 40-Pin Quad Flatpack No-Lead (QFN) Package SN761667 DIGITAL TV TUNER IC SLES200 – JANUARY 2007 QFN PACKAGE (TOP VIEW) OSC GND VHI OSC C VHI OSC B VLO OSC C VLO OSC B BS4 UHF RF IN1 UHF RF IN2 VHI RF IN VLO RF IN UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 IF GND IF OUT1 IF OUT2 CP VTU V CC 40 39 38 37 36 35 34 33 32 31 1 30 2 29 3 28 4 27 5 26 6 25 7 24 8 23 9 22 10 21 11 12 13 14 15 16 17 18 19 20 RF GND MIXOUT1 MIXOUT2 RF AGC OUT RF AGC FIL BS3 BS2 BS1 SDA SCL IF GCA IN1 IF GCA IN2 IF GCA CTRL IF GCA OUT2 IF GCA OUT1 P5/ADC XTAL1 XTAL2 XTAL OUT AS APPLICATIONS Digital TV Digital CATV Set-Top Box DESCRIPTION The SN761667 is a low-phase-noise synthesized tuner IC designed for digital TV tuning systems. The circuit consists of a PLL synthesizer, three-band local oscillator and mixer, RF AGC detector circuit, and IF gain-controlled amplifier. The SN761667 is available in a small QFN package. Please be aware that an important notice concerning availability, standard warranty, and use in critical application...