54ACT16841, 74ACT16841
20-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS174A – MAY 1991 – REVISED APRIL 1996
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
A
= 25°C
54ACT16841
74ACT16841
PARAMETER
TEST CONDITIONS
V
UNIT
CC
MIN
4.4
TYP
MAX
MIN
4.4
MAX
MIN
4.4
MAX
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
I
=–50 µA
OH
5.4
5.4
5.4
V
3.94
4.94
3.8
3.8
V
OH
OL
I
I
I
= –24 mA
= –75 mA
= 50 µA
OH
OH
OL
4.8
4.8
†
3.85
3.85
0.1
0.1
0.1
0.1
0.1
0.1
V
0.36
0.36
0.44
0.44
1.65
±1
0.44
0.44
1.65
±1
V
I
I
= 24 mA
OL
†
= 75 mA
OL
I
I
I
V = V
or GND
±0.1
±0.5
8
µA
µA
µA
I
I
CC
V
= V
or GND
±5
±5
OZ
CC
O
CC
V = V
or GND,
I
O
= 0
80
80
I
CC
One input at 3.4 V,
Other inputs at V
‡
5.5 V
0.9
1
1
mA
∆I
CC
or GND
CC
or GND
C
C
V = V
5 V
5 V
3
pF
pF
i
I
CC
= V or GND
CC
V
11
o
O
†
‡
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or V
.
CC
timing requirements over recommended operating free-air temperature range,
V
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
CC
T
= 25°C
54ACT16841
74ACT16841
A
UNIT
MIN
4
MAX
MIN
4
MAX
MIN
4
MAX
t
t
Pulse duration, LE high
ns
ns
w
Setup time, data before LE↓
1.5
3
1.5
3
1.5
3
su
High
t
h
Hold time, data after LE↓
ns
Low
4.5
4.5
4.5
switching characteristics over recommended operating free-air temperature range,
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
V
CC
T
A
= 25°C
TYP
7.1
54ACT16841
74ACT16841
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
ns
MIN
4
MAX
10.3
11
MIN
4
MAX
11.8
12.2
12.7
12.7
11.3
13.7
10.2
9.6
MIN
4
MAX
11.8
12.2
12.7
12.7
11.3
13.7
10.2
9.6
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PZH
PZL
PHZ
PLZ
D
Q
Q
Q
Q
3.2
4.5
4.3
3.1
3.8
4
6.9
3.2
4.5
4.3
3.1
3.8
4
3.2
4.5
4.3
3.1
3.8
4
7.7
11.3
11.4
10.1
12.1
9.5
LE
ns
7.8
6.4
ns
OE
OE
7.6
7.3
ns
4
6.8
8.9
4
4
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design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
4
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