74HC/HCT173 Philips Semiconductors (Acquired by NXP), 74HC/HCT173 Datasheet - Page 4

• Manufacturer Part Number: 74HC/HCT173
• Description: Quad D-type Flip-flop; Positive-edge Trigger; 3-state
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
FUNCTION TABLE
Notes
1. H = HIGH voltage level
December 1990
reset (clear)
parallel load
hold (no change)
read
disabled
Quad D-type flip-flop; positive-edge trigger; 3-state
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition
L = LOW voltage level
I = LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition
q = lower case letters indicate the state of the referenced input (or output)
X = don’t care
Z = high impedance OFF-state
= LOW-to-HIGH CP transition
one set-up time prior to the LOW-to-HIGH CP transition
3-STATE BUFFER OPERATING MODES
REGISTER OPERATING MODES
Fig.4 Functional diagram.
4
H
L
L
L
L
MR
Q
n
(register)
X
X
X
CP
H
X
X
L
INPUTS
INPUTS
X
l
l
h
X
E
1
L
L
H
X
OE
X
l
l
X
h
E
2
1
L
L
X
H
OE
X
l
h
X
X
D
n
2
74HC/HCT173
L
H
Z
Z
Q
Product specification
0
Q
OUTPUTS
OUTPUTS
L
H
Z
Z
n
Q
(register)
1
q
q
H
L
L
n
n
L
H
Z
Z
Q
2
L
H
Z
Z
Q
3