I have the following module which can be found on this website :- http://www.elecrow.com/uart-ttl-to-rs485-twoway-converter-p-1545.html
It is simply a bidirectional Uart TTL to RS485 converter. I have included the images below. The 8 pin small ic (U1) is RS485 which is itself unidirectional. I need help in identifying the second chip (U2), the one with 14 pins. This ic is responsible for switching between transmission and reception mode of the 485 ic. I have the module with me but the name of the ic has been erased. Plus there is no datasheet for the module available on the website. Could anyone please suggest what is the name of this ic??