Reset generator



The Mitsumi PST518B is a reset generator, it holds the NeoGeo in reset as long as the power supply is below 4.4V.

It has an open-collector output tied to the line (not  !), which is shared with the reset button on the home system. The line goes to.

Not to be confused with the watchdog reset.

Internal schematic


Datasheet:.

Replacement
Not pin-compatible: TL7757CL

Pin-compatible: MCP120-450GI/TO