Datasheet

SN54AHCT123A, SN74AHCT123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
SCLS420G – JUNE 1998 – REVISED APRIL 2003
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
TEST
T
A
= 25°C
SN54AHCT123A SN74AHCT123A
UNIT
PARAMETER
FROM
TO
TEST
A
UNIT
PARAMETER
(INPUT) (OUTPUT) CONDITIONS
MIN TYP MAX
MIN MAX MIN MAX
UNIT
t
PLH
A B
QQ
C
L
=15
p
F
5.3* 10* 1* 13* 1 11
ns
t
PHL
A
or
B
Q
or
Q
C
L
=
15
pF
5.3* 10* 1* 13* 1 11
ns
t
PLH
CLR
QQ
C
L
=15
p
F
7.7* 12* 1* 15* 1 13
ns
t
PHL
CLR
Q
or
Q
C
L
=
15
pF
7.7* 12* 1* 15* 1 13
ns
t
PLH
CLR ti
QQ
C
L
=15
p
F
8* 13* 1* 16* 1 14
ns
t
PHL
CLR
t
r
i
gger
Q
or
Q
C
L
=
15
pF
8* 13* 1* 16* 1 14
ns
t
PLH
A B
QQ
C
L
=50
p
F
6.8 11 1 14 1 12
ns
t
PHL
A
or
B
Q
or
Q
C
L
=
50
pF
6.8 11 1 14 1 12
ns
t
PLH
CLR
QorQ
C
L
=50
p
F
9.2 13 1 16 1 14
ns
t
PHL
CLR
Q
or
Q
C
L
=
50
pF
9.2 13 1 16 1 14
ns
t
PLH
CLR ti
QQ
C
L
=50
p
F
9.5 14 1 17 1 15
ns
t
PHL
CLR
t
r
i
gger
Q
or
Q
C
L
=
50
pF
9.5 14 1 17 1 15
ns
†
C
L
= 50 pF,
C
ext
= 28 pF,
R
ext
= 2 kΩ
133 200 240 240 ns
t
w
†
Q or Q
C
L
= 50 pF,
C
ext
= 0.01 µF,
R
ext
= 10 kΩ
90 100 110 90 110 90 110 s
C
L
= 50 pF,
C
ext
= 0.1 µF,
R
ext
= 10 kΩ
0.9 1 1.1 0.9 1.1 0.9 1.1 ms
∆t
w
‡
±1 %
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
†
t
w
= Pulse duration at Q and Q
outputs
‡
∆t
w
= Output pulse-duration variation (Q and Q
) between circuits in same package
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load 29 pF