74HC590 Datasheet, PDF (5/21 Pages) NXP Semiconductors – 8-bit binary counter with output register; 3-state

NXP Semiconductors
74HC590
8-bit binary counter with output register; 3-state
6. Functional description
Table 3. Function table^{[1] [2]}
Inputs
OE
CPR
MRC
CE
H
X
X
X
L
X
X
X
X
↑
X
X
X
↓
X
X
X
X
L
X
X
X
H
L
X
X
H
L
X
X
H
H
CPC
X
X
X
X
X
↑
↓
X
Description
Q outputs disable
Q outputs enable
counter data stored into register
register stage is not changed
counter clear
advance one count
no count
no count
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
↑ = LOW-to-HIGH transition;
↓ = HIGH-to-LOW transition.
[2] RCO = Q0’ · Q1’ · Q2’ · Q3’ · Q4’ · Q5’ · Q6’ · Q7’ (Q0’ to Q7’ are internal outputs of the counter).
74HC590_2
Product data sheet
Rev. 02 — 28 April 2009
© NXP B.V. 2009. All rights reserved.
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