Communication interface chip UART485/232

The NLAS4599 is an advanced high-speed CMOS SPDT analog switch fabricated on a silicon-gate CMOS process. It achieves high speed propagation delay and low on-resistance while maintaining low power consumption. This switch controls analog and digital voltages that vary over the full supply range (VCC to GND). The device design has a much lower on-resistance (RON) than traditional CMOS analog switches and is more linear with respect to input voltage. The channel select input is compatible with standard CMOS outputs; with a pull-up resistor, it is compatible with LSTTL outputs. The channel select input structure provides protection when voltages from 0 - 5.5 V are applied regardless of the supply voltage. This input structure helps prevent device damage due to supply voltage - input/output voltage mismatch, battery backup, hot insertion, etc.

The NLAS5123 is a low on-resistance SPDT analog switch. This device is suitable for low operating voltage, high current switching of speaker outputs in cellular phone applications. It switches the balanced stereo output. The NLAS5123 handles a balanced microphone/speaker/ringtone generator in mono mode. The device has a break-before-make (BBM) characteristic.