February 14, 2021

K1US671 - 3-stage FET amplifier : weekend die-shot

K1US671 is a 3-stage FET amplifier, made by Kwazar fab in Kiev, Ukraine, datecode 0278. Maximum rated frequency is 100kHz. Rated continuous linear acceleration limit 25g.

Die size 1246x1237 ┬Ám. Contamination & die crack are not mine (as it was in a metal can). Simple ICs in 1978 seems to forgive that.

PS. We are running low on metal-can and ceramic ICs. Let us know if you can send us some to open :-)