Datasheet
SN54LV74A, SN74LV74A
DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS
SCLS381L − AUGUST 1997 − REVISED APRIL 2005
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range, V
CC
= 2.5 V ± 0.2 V
(unless otherwise noted) (see Figure 1)
PARAMETER
T
A
= 25°C SN54LV74A SN74LV74A
UNIT
PARAMETER
MIN MAX MIN MAX MIN MAX
UNIT
t
Pulse duration
PRE or CLR low 8 9 9
ns
t
w
Pulse duration
CLK
8 9 9
ns
t
Setup time before CLK↑
Data 8 9 9
ns
t
su
Setup time before CLK
↑
PRE or CLR inactive 7 7 7
ns
t
h
Hold time, data after CLK↑ 0.5 0.5 0.5 ns
timing requirements over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V
(unless otherwise noted) (see Figure 1)
PARAMETER
T
A
= 25°C SN54LV74A SN74LV74A
UNIT
PARAMETER
MIN MAX MIN MAX MIN MAX
UNIT
t
Pulse duration
PRE or CLR low 6 7 7
ns
t
w
Pulse duration
CLK
6 7 7
ns
t
Setup time before CLK↑
Data 6 7 7
ns
t
su
Setup time before CLK
↑
PRE or CLR inactive 5 5 5
ns
t
h
Hold time, data after CLK↑ 0.5 0.5 0.5 ns
timing requirements over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V
(unless otherwise noted) (see Figure 1)
PARAMETER
T
A
= 25°C SN54LV74A SN74LV74A
UNIT
PARAMETER
MIN MAX MIN MAX MIN MAX
UNIT
t
Pulse duration
PRE or CLR low 5 5 5
ns
t
w
Pulse duration
CLK
5 5 5
ns
t
Setup time before CLK↑
Data 5 5 5
ns
t
su
Setup time before CLK
↑
PRE or CLR inactive 3 3 3
ns
t
h
Hold time, data after CLK↑ 0.5 0.5 0.5 ns
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 SN54LV74A SN74LV74A
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
f
C
L
= 15 pF 50* 100* 40* 40
MHz
f
max
C
L
= 50 pF 30 70 25 25
MHz
t
PRE or CLR
QQ
C 15 pF
9.8* 14.8* 1* 17* 1 17
ns
t
pd
CLK
Q or Q
C
L
= 15 pF
11.1* 16.4* 1* 19* 1 19
ns
t
PRE or CLR
QorQ
C =50pF
13 17.4 1 20 1 20
ns
t
pd
CLK
Q or Q
C
L
= 50 pF
14.2 20 1 23 1 23
ns
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.