
Philips Semiconductors
Octal transparent latch (3-State)
Product specification
74ABT373A
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
3 4 7 8 13 14 17 18
D0 D1 D2 D3 D4 D5 D6 D7
11
E
1
OE
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
2 5 6 9 12 15 16 19
SA00060
FUNCTION TABLE
INPUTS
INTERNAL OUTPUTS
OE E Dn REGISTER Q0 – Q7
OPERATING
MODE
LH L
L
LHH
H
L
Enable and read
H
register
L↓ l
L
L↓ h
H
L
Latch and read
H
register
LLX
NC
NC
Hold
HL X
NC
H H Dn
Dn
Z
Z
Disable outputs
H=
h=
L=
l=
NC=
X=
Z=
↓=
High voltage level
High voltage level one set-up time prior to the High-to-Low E
transition
Low voltage level
Low voltage level one set-up time prior to the High-to-Low E
transition
No change
Don’t care
High impedance “off” state
High-to-Low E transition
LOGIC DIAGRAM
D0
D1
D2
D3
3
4
7
8
1
EN
11
C1
3
1D
4
7
8
13
14
17
18
2
5
6
9
12
15
16
19
SA00061
D4
13
D5
14
D6
17
D7
18
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
D
EQ
11
E
1
OE
2
5
6
9
12
15
16
19
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
SA00062
1995 Feb 17
3