NANDL (RS Latch)

Asynchronous Reset-Set Latch built from NAND gates.

STORAGE

Model

S R Q

Operation

The NANDL is an active-low RS latch. It maintains its state when both inputs are 1. The state is changed by pulling either S or R to 0.

S (Set) R (Reset) Q (Next) Comment
1 1 Q Last state
0 1 1 Set
1 0 0 Reset
0 0 1 Disallowed (Both 1)
X X Unknown state

Equivalent Type Statement

Type=NANDL i=S,R o=Q