TC74HC40105AP register equivalent, 4-bit x 16 word fifo register.
* High speed: fmax 25 MHz (typ.) at VCC = 5 V
* Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
* High noise immunity: VNIH = VNIL = 28% VCC (min)
* .
(1) Writing data Data can be written into the FIFO whenever DIR is high and a low to high transition occurs on the
SI pin. DIR will toggle momentarily until the data has been transferred to the second word register. SI must be toggled before the next.
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