Datasheet

54ACT16841, 74ACT16841
20-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS174A – MAY 1991 – REVISED APRIL 1996
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C 54ACT16841 74ACT16841
UNIT
PARAMETER
TEST
CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
I
OH
=50µA
4.5 V 4.4 4.4 4.4
I
OH
=–
50
µ
A
5.5 V 5.4 5.4 5.4
V
OH
I
OH
=24mA
4.5 V 3.94 3.8 3.8
V
I
OH
= –
24
mA
5.5 V 4.94 4.8 4.8
I
OH
= –75 mA
†
5.5 V 3.85 3.85
I
OL
=50µA
4.5 V 0.1 0.1 0.1
I
OL
=
50
µ
A
5.5 V 0.1 0.1 0.1
V
OL
I
OL
=24mA
4.5 V 0.36 0.44 0.44
V
I
OL
=
24
mA
5.5 V 0.36 0.44 0.44
I
OL
= 75 mA
†
5.5 V 1.65 1.65
I
I
V
I
= V
CC
or GND 5.5 V ±0.1 ±1 ±1 µA
I
OZ
V
O
= V
CC
or GND 5.5 V ±0.5 ±5 ±5 µA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 8 80 80 µA
∆I
CC
‡
One input at 3.4 V,
Other inputs at V
CC
or GND
5.5 V 0.9 1 1 mA
C
i
V
I
= V
CC
or GND 5 V 3 pF
C
o
V
O
= V
CC
or GND 5 V 11 pF
†
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
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
T
A
= 25°C 54ACT16841 74ACT16841
UNIT
MIN MAX MIN MAX MIN MAX
UNIT
t
w
Pulse duration, LE high 4 4 4 ns
t
su
Setup time, data before LE↓ 1.5 1.5 1.5 ns
t
h
Hold time data after LE↓
High 3 3 3
ns
t
h
Hold
time
,
data
after
LE↓
Low 4.5 4.5 4.5
ns
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO
T
A
= 25°C 54ACT16841 74ACT16841
UNIT
PARAMETER
(INPUT) (OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
D
Q
4 7.1 10.3 4 11.8 4 11.8
ns
t
PHL
D
Q
3.2 6.9 11 3.2 12.2 3.2 12.2
ns
t
PLH
LE
Q
4.5 7.7 11.3 4.5 12.7 4.5 12.7
ns
t
PHL
LE
Q
4.3 7.8 11.4 4.3 12.7 4.3 12.7
ns
t
PZH
OE
Q
3.1 6.4 10.1 3.1 11.3 3.1 11.3
ns
t
PZL
OE
Q
3.8 7.6 12.1 3.8 13.7 3.8 13.7
ns
t
PHZ
OE
Q
4 7.3 9.5 4 10.2 4 10.2
ns
t
PLZ
OE
Q
4 6.8 8.9 4 9.6 4 9.6
ns
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