Hi, I need help identifying a surface-mount IC. It appears to be an SOT-143 package, is used as an RF amp in the 1-2 GHz region, and has markings variously of DA3,DA4,DA7,DT5, etc. The units that contain these amps were manufactured from around 1992 to 1998 or so. Here's a diagram (hope it survives posting).
GND __ _ OUT __|__|___|_|_ | | | | | | |_____________| |_| |_| IN CAP to GND
I've tried looking through the datasheets available online with no success. The unit uses known RF parts from Fujitsu, HP, and NEC. Any help is greatly appreciated.
Thanks
CableGuy