November 10, 2014

DIP 10Mhz Quartz oscillator based on Seiko NPC HA5022A3 : weekend die-shot

Seiko NPC HA5022A3 contains internal load capacitors, oscillator with amplitude limiting (for reduced power consumption) and optional frequency divider.
Die size 976x770 ┬Ám.

Quartz crystal is mounted on springs - in order to reduce impact of vibration on oscillation stability and to make it's damage less likely:


There is an oscillator IC soldered on the ceramic PCB, as well as 0.01uF power supply decoupling cap. It seems we need to go deeper: