Communication interface chip UART485/232

SN75LBC176 Differential Bus Transceiver

Hardwired TCP/IP embedded Ethernet controller that provides . easier Internet connection to embedded systems

Support mount Flash/TF card/U disk, playback through the command index, need to mount Flash and TF card at the same time, or only mount Flash, can't mount the card alone, connected to the computer through the USB interface will display the mounted memory disk (simulation of a USB flash drive); 2) audio format support mp3/wav, mono audio bit rate support 8kbps ~ 320kbps, dual channel (up to 128kbps), sampling rate 8K-44.1K

The NLAS4684 is an advanced CMOS analog switch fabricated on a submicron silicon gate CMOS process. The device is a dual independent single-pole double-throw (SPDT) switch with ultra-low on-resistance of 0.5 Ω for normally closed (NC) switching and 0.8 Ω ultra low for normally open (NO) switching at 2.7 V. Low on-resistance. The part also features a guaranteed break-before-make switch, ensuring that the switch does not short out the driver. The NLAS4684 features a 2.0 x 1.5 mm bumped chip array with a 3 x 4 solder bump arrangement. The solder bumps are spaced at 0.5 mm for easy handling. It also features 3 X 3 mm QFN-10 and 3 X 5 mm Micro-10 encapsulation.