Datasheet

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
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SDFS091 − MARCH 1987 − REVISED OCTOBER 1993
2−4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
switching characteristics (see Note 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
C
L
= 50 pF,
R
L
= 500 Ω,
T
A
= 25°C
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
R
L
= 500Ω,
T
A
= MIN to MAX
†
UNIT
(INPUT)
(OUTPUT)
′F521 SN54F521 SN74F521
MIN TYP MAX MIN MAX MIN MAX
t
PLH
P or Q
P = Q
2.7 6.6 10 2.7 14 2.7 11
ns
t
PHL
P or Q
P = Q
3.7 6.6 10 3.2 12 3.2 11
ns
t
PLH
OE
P = Q
2.2 4.6 6.5 2.2 8.5 2.2 7.5
ns
t
PHL
OE
P = Q
2.7 6.1 9 2.7 13.5 2.7 10
ns
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 3: Load circuits and waveforms are shown in Section 1.