Datasheet

CD74FCT244, CD74FCT244AT
BiCMOS OCTAL BUFFERS/LINE DRIVERS
WITH 3-STATE OUTPUTS
SCBS722B – JULY 2000 – REVISED AUGUST 2003
3
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
MIN
MAX
UNIT
PARAMETER
TEST CONDITIONS
V
CC
MIN MAX
MIN
MAX
UNIT
V
IK
I
I
= –18 mA 4.75 V –1.2 –1.2 V
V
OH
I
OH
= –15 mA 4.75 V 2.4 2.4 V
V
OL
I
OL
= 64 mA 4.75 V 0.55 0.55 V
I
I
V
I
= V
CC
or GND 5.25 V ±0.1 ±1 A
I
OZ
V
O
= V
CC
or GND 5.25 V ±0.5 ±10 A
I
OS
†
V
I
= V
CC
or GND, V
O
= 0 5.25 V –60 –60 mA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.25 V 8 80 A
∆I
CC
‡
One input at 3.4 V, Other inputs at V
CC
or GND 5.25 V 1.6 1.6 mA
C
i
V
I
= V
CC
or GND 10 10 pF
C
o
V
O
= V
CC
or GND 15 15 pF
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 100 ms.
‡
This is the increase in supply current for each input 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 ± 0.25 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
CD74FCT244 CD74FCT244AT
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
T
A
= 25°C
MIN
MAX
T
A
= 25°C
MIN
MAX
UNIT
(INPUT)
(OUTPUT)
TYP
MIN
MAX
TYP
MIN
MAX
t
pd
A
Y
4.5 1.5 6.5 3.8 1.5 5.3 ns
t
en
OE Y
6 1.5 8 4.8 1.5 6.5 ns
t
dis
OE Y
5 1.5 7 4.5 1.5 5.8 ns
noise characteristics, V
CC
= 5 V, C
L
= 50 pF, T
A
= 25°C
PARAMETER MIN TYP MAX UNIT
V
OL(P)
Quiet output, maximum dynamic V
OL
1 V
V
OH(V)
Quiet output, minimum dynamic V
OH
0.5 V
V
IH(D)
High-level dynamic input voltage 2 V
V
IL(D)
Low-level dynamic input voltage 0.8 V
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load, f = 1 MHz 35 pF