Datasheet

54ACT16861, 74ACT16861
20-BIT BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS197B – JUNE 1990 – REVISED NOVEMBER 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 54ACT16861 74ACT16861
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
Control inputs V
I
= V
CC
or GND 5.5 V ±0.1 ±1 ±1 µA
I
OZ
‡
A or B ports 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
Control inputs V
I
= V
CC
or GND 5 V 4.5 pF
C
io
A or B ports V
O
= V
CC
or GND 5 V 17 pF
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
‡
For I/O ports, the parameter I
OZ
includes the input leakage current.
§
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
.
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 54ACT16861 74ACT16861
UNIT
PARAMETER
(INPUT) (OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
AorB
BorA
3.1 6.5 9.2 3.1 10.4 3.1 10.4
ns
t
PHL
A
or
B
B
or
A
2.9 7.5 10 2.9 11.1 2.9 11.1
ns
t
PZH
OEBA or OEAB
AorB
2.4 6.6 9 2.4 10 2.4 10
ns
t
PZL
OEBA
or
OEAB
A
or
B
3.7 8.5 11.5 3.7 12.7 3.7 12.7
ns
t
PHZ
OEBA or OEAB
AorB
4.9 7.4 9.8 4.9 10.7 4.9 10.7
ns
t
PLZ
OEBA
or
OEAB
A
or
B
4.5 6.9 9.3 4.5 10 4.5 10
ns
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
d
Power dissi
p
ation ca
p
acitance
p
er transceiver
Outputs enabled
C
L
=50
p
F
f=1MHz
64
p
F
C
pd
Po
w
er
dissipation
capacitance
per
transcei
v
er
Outputs disabled
C
L
=
50
pF
,
f
=
1
MH
z
14
pF
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design phase of development. Characteristic data and other
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change or discontinue these products without notice.