On Tue, 09 Dec 2008 01:03:53 -0500, Sergey Kubushin put
finger to keyboard and composed:

Does anybody know what 74HB139 is?

It might be SN74HB139, 54HB139 or something like this. 16 pin TSSOP, made by
Texas Instruments, marked as follows:

HB139
(TI Logo)97K
KDT6

I'm 100% sure it is good old 74xx139 but what the heck is "HB" ? Google
brings only a bunch of good chinese guys that have everything in stock,
whatever it's called, but not even a single piece of information...

It _IS_ "HB", not "HC". There are several of those and all are exactly the
same.

Any info on HB logic family?

SN54AHCT139, SN74AHCT139 Dual 2-line to 4-line
Decoders/Demultiplexers:
http://www.datasheetarchive.com/data...SA00144064.pdf

Page 2 of the datasheet has a list of top-side marking codes:

SSOP – DB Tape and reel SN74AHCT139DBR HB139
TSSOP – PW Tape and reel SN74AHCT139PWR HB139
TVSOP – DGV Tape and reel SN74AHCT139DGVR HB139

- Franc Zabkar
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