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SN761678DCHR Datasheet(PDF) 1 Page - Texas Instruments |
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SN761678DCHR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 21 page SN761678 TV/VCR TUNER SLES104 − DECEMBER 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Single Chip Mixer/Oscillator and Synthesizer D 3-Band Local Oscillator D I2C Bus Protocol D Bidirectional Data Transmission D 30-V Tuning Voltage Output D 4-Channel NPN-Type Bandswitch Drivers D Programmable Reference Divider Ratio (512, 640, or 1024) D 5-V Power Supply D 30-Pin TSSOP Package 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 VHI OSC C VHI OSC B OSC GND VLO OSC C VLO OSC B UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 IF GND VCC IF OUT CP VTU XTAL UHF RF IN VHF RF IN BS4 RF GND MIX OUT2 MIX OUT1 IF IN2 IF IN1 BS2 BS1 BS3 ADC AS SDA SCL DBT PACKAGE (TOP VIEW) description The SN761678 is a single-chip, synthesized tuner IC designed for TV/VCR tuning systems. The circuit consists of a PLL synthesizer, 3-band local oscillators and mixer, 30-V output tuning amplifier, four NPN band switch drivers, and is available in a small package outline. Fifteen-bit programmable counter and reference divider is controlled by I2C bus protocol. Tuning step frequency is selectable by this reference divider ratio for a 4-MHz XTAL oscillator. NOTE: The products, their specifications, service and other information appearing in this publication are subjected to change by Texas Instruments without notice. This device has limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2003, Texas Instruments Incorporated 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 end of this data sheet. |
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