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6.12
SPDIF Switch (NLAST4599)
The NLAST4599 is an advanced high speed CMOS single pole − double throw analog switch fabricated
with silicon gate CMOS technology. It achieves high speed propagation delays and low ON resistances
while maintaining low power dissipation. This switch controls analog and digital voltages that may vary
across the full power−supply range (from VCC to GND).
The device has been designed so the ON resistance (RON) is much lower and more linear over input
voltage than RON of typical CMOS analog switches.
The channel select input structure provides protection when voltages between 0 V and 5.5 V are applied,
regardless of the supply voltage. This input structure helps prevent device destruction caused by supply
voltage − input/output voltage mismatch, battery backup, hot insertion, etc.
Main features of NLAST4599 are:
• Select Pin Compatible with TTL Levels
• Channel Select Input Over−Voltage Tolerant to 5.5 V
• Fast Switching and Propagation Speeds
• Break−Before−Make Circuitry
• Low Power Dissipation: ICC = 2 _A (Max) at TA = 25°C
• Diode Protection Provided on Channel Select Input
• Improved Linearity and Lower ON Resistance over Input Voltage
• Latch−up Performance Exceeds 300 mA
• ESD Performance: HBM > 2000 V; MM > 200 V
Figure 6.11.1: Block diagram of CS4334
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