The GX434 is a high performance low cost monolithic 4x1 video multiplexer incorporating four bipolar switches with a common output, a 2 to 4 address decoder and fast chip select circuitry. The chip select input allows for multi-chip paralleled operation in routing matrix applications. The chip is selected by applying a logic 0 on the chip select input.
Unlike devices using MOS bilateral switching elements, these bipolar circuits represent fully buffered, unilateral transmission paths when selected. This results in extremely high output to input isolation. They also feature fast make-before-break switching action. These features eliminate such problems as switching 'glitches' and output-to-input signal feedthrough.
The GX434 operates from ±7 to ± 13.2 volt DC supplies. They are specifically designed for video signal switching which requires extremely low differential phase and gain. Logic inputs are TTL and 5 volt CMOS compatible providing address and chip select functions. When the chip is not selected, the output goes to a high impedance state.
low differential gain: 0.03% typ. at 4.43MHz
low differential phase: 0.012 deg. typ. at 4.43MHz
low insertion loss: 0.05dB max at 100kHz
low disabled power consumption: 5.2mW typ.
high off isolation: 110dB at 10MHz
all hostile crosstalk @ 5MHz, 97dB typ.
bandwidth (-3dB) with 30pF load, 100MHz typ.
fast make-before-break switching: 200ns typ.
TTL and 5 volt CMOS compatible logic inputs
low cost 14 pin DIP and16 pin SOIC packages
optimised performance for NTSC, PAL and SECAM applications
Glitch free analog switching for: High quality video routing; A/D input multiplexing; Sample and hold circuits; TV/ CATV/ monitor switching
