SN761672A

·􀀀 Single Chip Mixer/Oscillator and Synthesizer
·􀀀 VHF-L, VHF-H, UHF 3-Band Local Oscillator
·􀀀 I²C Bus Protocol
·􀀀 Bidirectional Data Transmission
·􀀀 30-V Tuning Voltage Output
·􀀀 4-Channel NPN Type Band Switch Drivers
·􀀀 Programmable Reference Divider Ratio (512, 640 or 1024)
·􀀀 5-V Power Supply
·􀀀 32-Pin TSSOP Package

Supply voltage, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 0.4 V ~ 7 V
Input voltage 1, V_I(GND) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . 0.4 V ~ 0.4 V
Input voltage 2, V_I(VTU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4 V~ 35 V
Input voltage 3, V_(VTU) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 0.4 V ~ 7 V
Continuous total dissipation at (or below T_A = 25°C . . . . . . . . . .. . See Dissipation Rating Table
Operating free-air temperature, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . 20°C to 85°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . 65°C to 150°C
Maximum junction temperature, T_J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Maximum lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . 260°C
Maximum short circuit time, t_(SCMAX), All pins to V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . TBD
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Voltage values are with respect to the IF GND of the circuit.

SN761672A 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, a 30-V output tuning amplifier, and four NPN band switch drivers. It is 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.