Datasheet
SCLS352H − JULY 1997 − REVISED OCTOBER 2005
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C SN54AHC123A SN74AHC123A
UNIT
PARAMETER
TEST CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 1.9 2 1.9 1.9
I
OH
= −50 mA
3 V 2.9 3 2.9 2.9
V
OH
I
OH
= −50 mA
4.5 V 4.4 4.5 4.4 4.4
V
V
OH
I
OH
= −4 mA 3 V 2.58 2.48 2.48
V
I
OH
= −8 mA 4.5 V 3.94 3.8 3.8
2 V 0.1 0.1 0.1
I
OL
= 50 mA
3 V 0.1 0.1 0.1
V
OL
I
OL
= 50 mA
4.5 V 0.1 0.1 0.1
V
V
OL
I
OL
= 4 mA 3 V 0.36 0.5 0.44
V
I
OL
= 8 mA 4.5 V 0.36 0.5 0.44
I
I
R
ext
/C
ext
†
V
I
= V
CC
or GND 5.5 V ±0.25 ±2.5 ±2.5
A
I
I
A, B, and CLR
V
I
= V
CC
or GND 0 V to 5.5 V ±0.1 ±1* ±1
mA
I
CC
Quiescent V
I
= V
CC
or GND, I
O
= 0 5.5 V 4 40 40 mA
Active state
V
I
= V
CC
or GND,
3 V 160 250 280 280
I
CC
Active state
(per circuit)
V
I
= V
CC
or GND,
R
ext
/C
ext
= 0.5 V
CC
4.5 V 280 500 650 650
mA
I
CC
(per circuit)
R
ext
/C
ext
= 0.5 V
CC
5.5 V 360 750 975 975
mA
C
i
V
I
= V
CC
or GND 5 V 1.9 10 10 pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested at V
CC
= 0 V.
†
This test is performed with the terminal in the off-state condition.
timing requirements over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V
(unless otherwise noted) (see Figure 1)
TEST CONDITIONS
T
A
= 25°C SN54AHC123A SN74AHC123A
UNIT
TEST CONDITIONS
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
w
Pulse
CLR 5 5 5
ns
t
w
Pulse
duration
A
or B trigger 5 5 5
ns
t
rr
Pulse retrigger time
R
ext
= 1 kΩ, C
ext
= 100 pF
‡
76
‡ ‡
ns
t
rr
Pulse retrigger time
R
ext
= 1 kΩ, C
ext
= 0.01 mF
‡
1.8
‡ ‡
ms
‡
See retriggering data in the application information section.
timing requirements over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V
(unless otherwise noted) (see Figure 1)
TEST CONDITIONS
T
A
= 25°C SN54AHC123A SN74AHC123A
UNIT
TEST CONDITIONS
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
w
Pulse
CLR 5 5 5
ns
t
w
Pulse
duration
A
or B trigger 5 5 5
ns
t
rr
Pulse retrigger time
R
ext
= 1 kΩ, C
ext
= 100 pF
‡
59
‡ ‡
ns
t
rr
Pulse retrigger time
R
ext
= 1 kΩ, C
ext
= 0.01 mF
‡
1.5
‡ ‡
ms
‡
See retriggering data in the application information section.