BQ24167 date code / revision

Hi Ignacio,

  Not sure what the '231' is referring to.  The part marking has more characters, for example, see page 25 of the datasheet.  Also, which package?  As far as I know, this device does not have a revision.  The silicon is the same from the release date (RTM), no changes have been made.   The datasheet has been revised to correct errors, see page 26.

What issues is the customer seeing?  There was a test added in production for battery backflow - is their issue related to this?  Have they looked at E2E for any related queries? 

-Leonard

The part has the following markings:

BQ

24167

TI 231

A851

okay, thanks . . . what are the 'technical issues' they are seeing?  If it is confidential info, please send me a direct email.

-Leonard

Analog Applications - ACAT Dallas

Wants to be sure they get the Rev 2.5 chips, as in the previous Rev 2.2 and Rev 2.3, the chip would not charge the battery if the VUSB is < 4.7V.

<=Rev 2.3 - sampled to large customers

Rev 2.3 - on first build of EVMs

Rev 2.5 built before 201209 - is final but could have ICs that allow current to backflow from VBAT to IN/USB

Rev 2.5 build after 201209 - final silicon with test screen to prevent above

Only method to determine rev and build date is for someone to look up the top marking on a TI internal website.

based on the markings given, the customer wants to know if they are Rev 2.5 build after 201209 – final silicon.

They are REV 2.5 but were built in March of 2012.