SN761672A Datasheet | Texas Instruments

description SN761672A is a single chip synthesized tuner IC designed for TV/VCR tuning systems. The circuit consists of a PLL synthesizer, 3-band local IF OUT2 VCC CP VTU XTAL 12 13 14 15 16 21 NC 20 ADC 19 AS 18 SDA 17 SCL oscillators and mixer, a 30-V output tuning amplifier, and four NPN band switch drivers. It is - No internal connection available in a small package outline. The 15-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 crystal oscillator. 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. 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. - POST OFFICE BOX 655303 DALLAS, TEXAS 75265 Copyright © 2001, Texas Instruments Incorporated 1 SN761672A TV/VCR TUNER IC SLLS437 - JANUARY 2001 block diagram VOL OSC B VOL OSC C OSC GND VHI OSC B VHI OSC C UHF OSC B1 UHF OSC C1 UHF OSC C2 UHF OSC B2 MIX OUT1 MIX OUT2 VCC VHF RF IN1 VHF RF IN2 UHF RF IN1 UHF RF IN2 RF GND XTAL SCL SDA AS NC VHF-L OSC VHF-H OSC UHF OSC VHF Mixer UHF Mixer IF Amplifier IF OUT1 IF OUT2 IF GND 1/8 Prescaler XTAL OSC 4 MHz 1/32, 1/33 Prescaler 512/640/1024 Prescaler I2C Bus Interface 5-Level ADC 15 Bit Counter Phase Detector Charge Pump OP AMP NPN Band Switch Port CP...