Datasheet
SDFS006A − MARCH 1987 − REVISED OCTOBER 1993
2−3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
switching characteristics (see Note 2)
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)
′F21 SN54F21 SN74F21
MIN TYP MAX MIN MAX MIN MAX
t
PLH
A, B, C, or D
Y
1 3.2 4.7 1 5.6 1 5.3
ns
t
PHL
A, B, C, or D
Y
1.5 3.4 5.1 1.5 5.9 1.5 5.5
ns
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and waveforms are shown in Section 1.