SM5309B

SM5309B 3-channel Video Buffer with Built-in wideband LPF OVERVIEW The SM5309B is a 3-channel video buffer with built-in 5th-order lowpass filters. The lowpass filter cutoff frequency range can adjust from 4MHz to 40MHz*1 by 256 steps. The lowpass filter supports 480i to 1080i format, video signal equipment analog input/outputs. For video input systems, the device functions as a next-stage ADC system anti-aliasing filter. For video output systems, the filter reduces video DAC aliasing and external noise and can drive up to two 75Ω terminating resistance. The cutoff frequency and signal input type can be controlled using an I2C-BUS*2, and the I2C slave address can be set by ADS (3-state input) to allow up to three SM5309B on the same bus. *1. When the resistor connected to ISET (RISET) is 1.8kΩ. *2. I2C-BUS is a registered trademark of NXP B.V. FEATURES I Supply voltages Analog: 4.75 to 5.25V I2C-BUS interface: 3.0 to 5.5V I Lowpass filter with adjustable cutoff frequency (256 steps) Cutoff frequency range: 4MHz to 40MHz (RISET = 1.8kΩ) I Filter bypass mode function for display specifications up to SXGA resolution Passband: 80MHz (typ) I Half fc mode switch function (CH-2, CH-3) suitable for component signals I 2-system input multiplexer function (switchable using I2C-BUS or MUXSEL input) I Video input pins can be independently set to synctip clamp/bias/direct inputs I Up to two 75Ω terminating resistance drive capability I Output gain: 0dB I Power-down function ≤ 1mA cu...