======
MC3031
======

**MC3031** is an IC that implements a RS NAND latch (Frequently called SR-NAND Latch) with an inversed result for when both inputs are the same. Only
the Q output is available.

When the |S| (inverse "set") input exclusively goes high, the output (Q) goes high and stays high even if |S| goes low again. When the |R| (inverse
"reset") input exclusively goes high, the output (Q) goes low and stays low even if |R| goes low again. If both go high at the same time, the output
goes high.

If both go low at the same time, the output does not change.

See `MC3033 <MC3033.html>`_ for a regular RS-NAND latch.

Equivalent Perlstone script: ``AB&[Lp0r]BA.1100dSp0r``

Logic Table
===========

===  === ==========
|S|  |R|     Q
===  === ==========
0    0   Keep State
1    0   1
0    1   0
1    1   1
===  === ==========

.. |S| unicode:: U+0053 U+0305 .. Combining Overline S
.. |R| unicode:: U+0052 U+0305 .. Combining Overline R


Sign Lines
==========

1. INV RS-NAND
2. [MC3031]
3. Blank
4. Blank


IC Pins
=======


Inputs
------

- Set
- Reset

Outputs
-------

- Q


Permissions
===========

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Node                     Description                                               Default Role 
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craftbook.ic.safe.mc3031 Allows creation of the Inverse RS-Nand Latch (MC3031) IC. user         
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