Hi all,
Before we powered up our custom board with C6670, we got the resistance value of 0.2 Ohm between CVDD and GND using the hand-held multi-meter and the resistance value of 0.2 Ohm between CVDD and GND is 0.2 Ohm also. Is this normal? We think there must be a short circuit.
After we check the schematics and PCB, we can not find any errors. So we suspect that there must be some errors about this C6670 itself. Actually we bought it from a seller with a very low price about 167$ of two pcs.
The C6670 we bought is as follow
From the errata of C6670, the table 1 is as follow
We find the lot trace could be 10A or 20C. So what is the C6670 we bought with Lot trace of YB20?
In another board, we find the YB20C chip as follow
1. So what is the difference between YB20 and YB20C? Is the YB20 very old chip?
2. How to differentiate the TMS320C6670CYP2 and TMS320C6670ACYP2 from the C6670's surface?
3. Is the value of 0.2 Ohm between and CVDD or CVDD1 and GND normal before powering up the C6670?
Regards,
Feng
3