Other Parts Discussed in Thread: SN74AHCU04, SN74LVC1GX04
We have run into a problem with the SN74HC04DR part. Parts with the code: 07C2CFK work fine, but parts with code 25A3D9K do not.
Examining the parts via X-ray, we see that the die inside the 25A* parts is signifcantly smaller. In the same circuit, the good parts will have a 32 MHz output signal, as expected.
The 25A* parts only have a 17kHz output. The parts are used in a Pierce Oscilaltor design as described in https://www.ti.com/lit/an/szza043/szza043.pdf.
See the attached schematic.
- Was there a die-shrink between those 2 lot/date codes?
- Is there a reason this circuit is not working?
Thank you.
