Datasheet

 
   
SCES340E − SEPTEMBER 2000 − REVISED APRIL 2005
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range,
V
CC
= 2.5 V ± 0.2 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
LOAD
T
A
= 25°C SN54LV21A SN74LV21A
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
pd
A, B, C, or D Y C
L
= 15 pF 7* 12* 1* 14* 1 14 ns
t
pd
A, B, C, or D Y C
L
= 50 pF 9.2 15.7 1 19 1 19 ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
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 SN54LV21A SN74LV21A
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
pd
A, B, C, or D Y C
L
= 15 pF 5.1* 7* 1* 8.5* 1 8.5 ns
t
pd
A, B, C, or D Y C
L
= 50 pF 6.6 10.5 1 12 1 12 ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
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 SN54LV21A SN74LV21A
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
pd
A, B, C, or D Y C
L
= 15 pF 3.8* 5* 1* 6* 1 6 ns
t
pd
A, B, C, or D Y C
L
= 50 pF 4.9 7 1 8 1 8 ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
noise characteristics, V
CC
= 3.3 V, C
L
= 50 pF, T
A
= 25°C (see Note 5)
PARAMETER
SN74LV21A
UNIT
PARAMETER
MIN TYP MAX
UNIT
V
OL(P)
Quiet output, maximum dynamic V
OL
0.2 0.8 V
V
OL(V)
Quiet output, minimum dynamic V
OL
0 −0.8 V
V
OH(V)
Quiet output, minimum dynamic V
OH
3.2 V
V
IH(D)
High-level dynamic input voltage 2.31 V
V
IL(D)
Low-level dynamic input voltage 0.99 V
NOTE 5: Characteristics are for surface-mount packages only.
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS V
CC
TYP UNIT
C
pd
Power dissipation capacitance
C
L
= 50 pF,
f = 10 MHz
3.3 V 17.4
pF
C
pd
Power dissipation capacitance
C
L
= 50 pF,
f = 10 MHz
5 V 20.2
pF
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