Thread: Identify IC ?
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John Robertson John Robertson is offline
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Default Identify IC ?

On 2019/03/10 2:13 p.m., N_Cook wrote:
On 10/03/2019 18:31, N_Cook wrote:
On 10/03/2019 16:06, N_Cook wrote:
RIFAR540
RD6416 N
Could be 1 instead of I , and N probably refers to the plastic
encapsulation. 14 pin IC in the power supply sectionÂ* of some 1979 kit.


Until I can power-up probe/explore trackside, my guess is perhaps , from
the "16",Â* a variant of CMOS quad analogue sw.


pins 1,3,5 and 13 seem of the same type or function, inputs or outputs
or control lines from another board, so could be quad an. sw.
A stepped range of supply volts or amps would make some sense for a
step-wise variable drive.


UA/LM741 was a common regulator back then and came in a 14 pin DIP, but
it doesn't match your description of particular pins. Where is your
device relative to the pass transistor? Does it drive the base or the
[ass transistor or does it drive another transistor that perhaps drives
the base?

What equipment is it used in? You say some kit, more info may help if
one of us has the schematics...

John :-#)#

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