The MAX4885ETJ+T is a complete VGA 1:2 or 2:1 multiplexer in 32 pin TQFN package. It integrates high-bandwidth analogue switches and level-translating buffers to implement a complete 1:2 or 2:1 multiplexer for VGA signals. The device provides switching for RGB, display data channel (DDC) and horizontal and vertical synchronization (HSYNC, VSYNC) signals. A low-noise charge pump with internal capacitors provides a boosted gate drive voltage to improve performance of the RGB switches. In the 1:2 multiplexer mode, HSYNC/VSYNC inputs feature level-shifting buffers to support low voltage CMOS or standard TTL compatible graphics controllers. In the 2:1 multiplexer mode, the output buffers for the HSYNC/VSYNC inputs are disabled allowing bidirectional signalling. In both modes, DDC signals are voltage clamped to an external voltage to provide level translation and protection. The MAX4885 features a 5μA shutdown mode and is ESD protected to ±8KV human body model on externally routed pins.
- Supply voltage range is 4.5V to 5.5V
- Operating temperature range from -40°C to 85°C
- Low 5ohm (typ) on-resistance for R, G, B signals
- On-resistance matching is 0.5ohm and on-resistance flatness is 0.02ohm
- Low 13pF (typ) on-capacitance for R, G, B signals
- Break before make switching protects against circuit shorts
- Low 300μA supply current (lower than 1μA with charge pump disabled)
信号处理, 便携式器材
(EN)
