Datasheet
SN54AHC595, SN74AHC595
www.ti.com
SCLS373J –MAY 1996–REVISED JULY 2013
TIMING REQUIREMENTS
over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
–40°C TO 125°C
–55°C TO 125°C –40°C TO 85°C
T
A
= 25°C Recommended
SN54AHC595
(1)
SN74AHC595
UNIT
SN74AHC595
MIN MAX MIN MAX MIN MAX MIN MAX
SRCLK high or low 5 5 5 6
t
W
Pulse duration RCLK high or low 5 5 5 6 ns
SRCLR low 5 5 5 6.2
SER before SRCLK↑ 3 3 3 4
SRCLK↑ before RCLK↑
(2)
5 5 5 6
t
su
Setup time ns
SRCLR low before RCLK↑ 5 5 5 6
SRCLR high (inactive) before 2.5 2.5 2.5 3.5
SRCLK↑
t
h
Hold time SER after SRCLK↑ 2 2 2 3 ns
(1) Product Preview.
(2) This setup time allows the storage register to receive stable data from the shift register. The clocks can be tied together, in which case
the shift register is one clock pulse ahead of the storage register.
SWITCHING CHARACTERISTICS
over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
–55°C TO –40°C TO –40°C TO 125°C
LOAD
T
A
= 25°C 125°C 85°C Recommended
FROM TO
PARAMETER CAPACITANC UNIT
SN54AHC595 SN74AHC595 SN74AHC595
(INPUT) (OUTPUT)
E
MIN TYP MAX MIN MAX MIN MAX MIN MAX
C
L
= 15 pF 80
(1)
120
(1)
70
(1)
70 60
f
max
MHz
C
L
= 50 pF 55 105 50 50 40
13.5
(1
t
PLH
6
(1)
11.9
(1)
1
(1)
1 13.5 1 14.9
)
RCLK Q
A
– Q
H
C
L
= 15 pF ns
13.5
(1
t
PHL
6
(1)
11.9
(1)
1
(1)
1 13.5 1 14.9
)
t
PLH
6.6
(1)
13
(1)
1
(1)
15
(1)
1 15 1 16.4
SRCLK Q
H'
C
L
= 15 pF ns
t
PHL
6.6
(1)
13
(1)
1
(1)
15
(1)
1 15 1 16.4
13.7
(1
t
PHL
SRCLR Q
H'
C
L
= 15 pF 6.2
(1)
12.8
(1)
1
(1)
1 13.7 1 15 ns
)
13.5
(1
t
PZH
6
(1)
11.5
(1)
1
(1)
1 13.5 1 14.9
)
OE Q
A
– Q
H
C
L
= 15 pF ns
13.5
(1
t
PZL
7.8
(1)
11.5
(1)
1
(1)
1 13.5 1 14.9
)
t
PLH
7.9 15.4 1 17 1 17 1 18.6
RCLK Q
A
– Q
H
C
L
= 50 pF ns
t
PHL
7.9 15.4 1 17 1 17 1 18.6
t
PLH
9.2 16.5 1 18.5 1 18.5 1 20
SRCLK Q
H'
C
L
= 50 pF ns
t
PHL
9.2 16.5 1 18.5 1 18.5 1 20
t
PHL
SRCLR Q
H'
C
L
= 50 pF 9 16.3 1 17.2 1 17.2 1 18.7 ns
t
PZH
7.8 15 1 17 1 17 1 18.6
OE Q
A
– Q
H
C
L
= 50 pF ns
t
PZL
9.6 15 1 17 1 17 1 18.6
t
PHZ
8.1 15.7 1 16.2 1 16.2 1 17.4
OE Q
A
– Q
H
C
L
= 50 pF ns
t
PLZ
9.3 15.7 1 16.2 1 16.2 1 17.4
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
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