i din’t get you want circuit for interfacing of sensor pair with microcontroller or circuit of IR sensor to to get TTL o/p….
for ir sensor i had given you above.. i had shown it for one ir pair…..
and for microcontroller interfacing… connect the TTL o/p to one the port(in your case port3)…
reffer to this link
http://www.engineersgarage.com/electronic-circuit/infrared-ir-sensor