MAX9598雙SCART矩陣開關能夠在I2C接口控制下實現機頂盒解碼芯片和兩個外部SCART控制器之間的音頻、視頻信號切換。MAX9598工作在3.3V和12V電源，以典型信號驅動典型負載時，靜態功耗為70mW，平均功耗為471mW。視頻輸入檢測、視頻負載檢測以及1.7mW低功耗模式非常適合低功耗機頂盒設計。

MAX9598的音頻電路提供音頻輸入至音頻輸出的交叉切換，并具有緩沖功能。DirectDrive?輸出放大器產生一個以地為參考的2V_RMS滿幅音頻信號，無需大體積輸出電容，并降低了咔嗒聲。過零檢測電路僅在過零時切換音頻信號，從而進一步降低咔嗒聲。

MAX9598視頻電路提供視頻輸入至視頻輸出的交叉切換，并具有緩沖功能。來自機頂盒解碼芯片的標清視頻信號經過低通濾波后可以消除帶外雜波。

MAX9598還支持低速和快速信號切換，MAX9598輸出中斷信號可以通知微控制器(μC)系統狀態的改變。

MAX9598采用緊湊的40引腳、薄型QFN封裝，工作在0°C至+70°C商業級溫度范圍。

The MAX9598 dual SCART matrix routes audio and video
signals between a set-top box decoder chip and two
external SCART connectors under I2C control. Operating
from a 3.3V supply and a 12V supply, the MAX9598 consumes
70mW during quiescent operation and 471mW
during average operation when driving typical signals into
typical loads. Video input detection, video load detection,
and a 1.7mW low-power mode facilitate the design of lowpower
set-top boxes.
The MAX9598 audio section contains a buffered crosspoint
to route audio inputs to audio outputs. The
DirectDrive? output amplifiers create a 2VRMS fullscale
audio signal biased around ground, eliminating
the need for bulky output capacitors and reducing
click-and-pop noise. The zero-cross detection circuitry
also further reduces clicks and pops by enabling audio
sources to switch only during a zero-crossing.
The MAX9598 video section contains a buffered crosspoint
to route video inputs to video outputs. The standarddefinition
video signals from the set-top box decoder chip
are lowpass filtered to remove out-of-bandwidth artifacts.
The MAX9598 also supports slow-switching and fast-switching
signals. An interrupt signal from the MAX9598 informs the
microcontroller (μC) when the system status has changed.
The MAX9598 is available in a compact 40-pin thin QFN
package and is specified over the 0°C to +70°C commercial
temperature range.