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模拟开关
GT3257
The GT3257 provides a quad 1-of-2 high-speed multiplexer/demultiplexer with common select (IN) and output enable EN inputs. The low ON resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. When pin EN = LOW, one of the two switches is selected (low-impedance ON-state) with pin IN. When pin EN = HIGH, all switches are in the high impedance OFF-state, independent of pin IN.
To ensure the high-impedance OFF-state during power-up or power-down, EN should be tied to the VCC through a pull- up resistor. The minimum value of the resistor is determined by the current-sinking capability of the driver. This device is fully specified for partial power-down applications using IOFF. The IOFF circuitry disables the output, preventing the damaging backflow current through the device when it is powered down.
特性
- Supply voltage range from 1.8 V to 5.5 V
- High noise immunity 4.5 Ω switch connection between two ports
- Rail to rail switching on data I/O ports
- CMOS low power consumption
- Latch-up performance exceeds 250 mA per JESD78B Class I level A
- IOFF circuitry provides partial Power-down mode operation
- Multiple package options
- Specified from -40 °C to 125 °C
应用
- Game Consoles
- Audio and Video Switching
- DVD Players
- Personal Video Recorders
- Supports defense, aerospace and medical applications
- Desktop Video Editors
- Hard Disk Recorders
