What is an HP1858-0054 transistor array?

John Foust jfoust at threedee.com
Thu Apr 5 14:57:11 CDT 2007

At 12:38 PM 4/5/2007, Tony Duell wrote:
>The chip is a 16 pin DIL package marked with the HP house-number 
>1858-0054. That's not in my equivalents list. The chip seems to have been 
>made by RCA, and tracing the connections to it show that 2 of the pins 
>are grounded, but none of them go to any power line. I susepct it's a 
>transistor array, therefore (HP1585-xxxx numbers tend to be transistor 
>arrays too).

Yes, the Google shows an Aligent document naming it as a transistor
array, but alas no pin-out.  It looks like Harris/Intersil and RCA 
made them, too.

- John

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