SN761683B

www.ti.com FEATURES Single-Chip Mixer/Oscillator and Phase-Locked Loop (PLL) Synthesizer Three-Band Local Oscillator and Mixer Inter-Integrated Circuit (I2C) Bus Protocol (Bidirectional Data Transmission) 30-V Tuning-Voltage Output Four NPN-Type Band-Switch (BS) Drivers Programmable Reference Divider Ratio (512, 640, or 1024) 5-V Power Supply 32-Pin Thin Shrink Small-Outline Package (TSSOP) APPLICATIONS TVs VCR/DVD Recorders Set-Top Boxes DESCRIPTION The SN761683B is a synthesized tuner IC designed for TV tuning systems. The circuit consists of a phase-locked loop (PLL) synthesizer, three-band local oscillator and mixer, 30-V output tuning amplifier, and four NPN band-switch drivers, and is available in a small-outline package. A 15-bit programmable counter and reference divider are controlled by inter-integrated circuit (I2C) bus protocol. SN761683B TV TUNER IC SLES180 – MAY 2006 TSSOP PACKAGE (TOP VIEW) VLO OSC B VLO OSC C OSC GND VHI OSC B VHI OSC C UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 IF GND IF OUT1 IF OUT2 VCC CP VTU XTAL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 UHF RF IN2 31 UHF RF IN1 30 VHF RF IN2 29 VHF RF IN1 28 RF GND 27 MIX OUT2 26 MIX OUT1 25 BS4 24 BS3 23 BS2 22 BS1 21 NC 20 ADC 19 AS 18 SDA 17 SCL NC – No internal connection Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the en...