According to the 436 manual, 1820-1361 is a Fairchild 9374DC.
From the schematic it looks like some BCD to 7 segment decoder.
Quite a different beast then the 75491 which seems to be just 4 drivers.
Now where to get one - salvage one from an other 436?
Marc.
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--- In hp_agilent_equipment@..., francesco messineo <francesco.messineo@...> wrote:
Hello,
On 8/28/11, m_elec_guy <mm777888@...> wrote:
Hi Group, I've got a HP436A with a defective LED display decoder IC
(A1U1...U4 - all same type of chip). Only 1 IC is bad, the others are fine.
I can't seem to find a replacement or substitute. Does anyone know where
one can get a replacement?
From the cross reference I have, it's reported as equivalent to
SN75491 display driver.
Best regards
Frank
