Datasheet
SN54AHC273, SN74AHC273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS376G – JUNE 1997 – REVISED JULY 2003
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO LOAD
T
A
= 25°C SN54AHC273 SN74AHC273
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
f
C
L
= 15 pF 75* 120* 65* 65
MHz
f
max
C
L
= 50 pF 50 75 45 45
MHz
t
PHL
CLR Q
C
L
= 15 pF 8.9* 13.6* 1* 16* 1 16 ns
t
PLH
CLK
Q
C
L
=15
p
F
8.7* 13.6* 1* 16* 1 16
ns
t
PHL
CLK
Q
C
L
=
15
pF
8.7* 13.6* 1* 16* 1 16
ns
t
PHL
CLR Q
C
L
= 50 pF 11.4 17.1 1 19.5 1 19.5 ns
t
PLH
CLK
Q
C
L
=50
p
F
11.2 17.1 1 19.5 1 19.5
ns
t
PHL
CLK
Q
C
L
=
50
pF
11.2 17.1 1 19.5 1 19.5
ns
t
sk(o)
C
L
= 50 pF 1.5** 1.5 ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
** On products compliant to MIL-PRF-38535, this parameter does not apply.
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 LOAD
T
A
= 25°C SN54AHC273 SN74AHC273
UNIT
PARAMETER
(INPUT) (OUTPUT) CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
f
C
L
= 15 pF 120* 165* 100* 100
MHz
f
max
C
L
= 50 pF 80 110 70 70
MHz
t
PHL
CLR Q
C
L
= 15 pF 5.2* 8.5* 1* 10* 1 10 ns
t
PLH
CLK
Q
C
L
=15
p
F
5.8* 9* 1* 10.5* 1 10.5
ns
t
PHL
CLK
Q
C
L
=
15
pF
5.8* 9* 1* 10.5* 1 10.5
ns
t
PHL
CLR Q
C
L
= 50 pF 6.7 10.5 1 12 1 12 ns
t
PLH
CLK
Q
C
L
=50
p
F
7.3 11 1 12.5 1 12.5
ns
t
PHL
CLK
Q
C
L
=
50
pF
7.3 11 1 12.5 1 12.5
ns
t
sk(o)
C
L
= 50 pF 1** 1 ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
** On products compliant to MIL-PRF-38535, this parameter does not apply.
noise characteristics, V
CC
= 5 V, C
L
= 50 pF, T
A
= 25°C (see Note 4)
PARAMETER
SN74AHC273
UNIT
PARAMETER
MIN TYP MAX
UNIT
V
OL(P)
Quiet output, maximum dynamic V
OL
0.7 V
V
OL(V)
Quiet output, minimum dynamic V
OL
–0.7 V
V
OH(V)
Quiet output, minimum dynamic V
OH
4.7 V
V
IH(D)
High-level dynamic input voltage 3.5 V
V
IL(D)
Low-level dynamic input voltage 1.5 V
NOTE 4: Characteristics are for surface-mount packages only.
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load, f = 1 MHz 31 pF