HD4074459 microcontroller equivalent, (hd4074458 / hd4074459) microcontroller.
* 8,192-word × 10-bit ROM (HD404458) 16,384-word × 10-bit ROM (HD404459 and HD4074459)
* 512-digit × 4-bit RAM (HD404458) 768-digit × 4-bit RAM (HD404459 and HD4.
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