Datasheet

©1983 Fairchild Semiconductor Corporation www.fairchildsemi.com
MM74HC125, MM74HC126 Rev. 1.3.0 5
MM74HC125, MM74HC126 — 3-STATE Quad Buffers
AC Electrical Characteristics
V
CC
= 5V, T
A
= 25°C, C
L
= 45pF, t
r
= t
f
= 6ns
AC Electrical Characteristics
V
CC
= 2.0V to 6.0V, C
L
= 50pF, t
r
= t
f
= 6ns (unless otherwise specified)
Note:
4. C
PD
determines the no load dynamic power consumption, P
D
= C
PD
V
CC
2
f + I
CC
V
CC
, and the no load dynamic
current consumption, I
S
= C
PD
V
CC
f + I
CC
.
Symbol Parameter Conditions Typ.
Guaranteed
Limit Units
t
PHL
, t
PLH
Maximum Propagation Delay Time 13 18 ns
t
PZH
Maximum Output Enable Time to HIGH
Level
R
L
= 1kΩ 13 25 ns
t
PHZ
Maximum Output Disable Time from
HIGH Level
R
L
= 1kΩ, C
L
= 5pF 17 25 ns
t
PZL
Maximum Output Enable Time to LOW
Level
R
L
= 1kΩ 18 25 ns
t
PLZ
Maximum Output Disable Time from
LOW Level
R
L
= 1kΩ, C
L
= 5pF 13 25 ns
Symbol Parameter V
CC
(V) Conditions
T
A
= 25°C
T
A
= –40°C
to 85°C
T
A
= –40°C
to 125°C
UnitsTyp. Guaranteed Limits
t
PHL
, t
PLH
Maximum Propagation
Delay Time
2.0 40 100 125 150 ns
4.5 14 20 25 30
6.0 12 17 21 25
t
PLH
, t
PHL
Maximum Propagation
Delay Time
2.0 C
L
= 150pF 35 130 163 195 ns
4.5 14 26 33 39
6.0 12 22 28 39
t
PZH
, t
PZL
Maximum Output
Enable Time
2.0 R
L
= 1kΩ 25 125 156 188 ns
4.5 14 25 31 38
6.0 12 21 26 31
t
PHZ
, t
PLZ
Maximum Output
Disable Time
2.0 R
L
= 1kΩ 25 125 156 188 ns
4.5 14 25 31 38
6.0 12 21 26 31
t
PZL
, t
PZH
Maximum Output
Enable Time
2.0 C
L
= 150pF,
R
L
= 1kΩ
35 140 175 210 ns
4.5 15 28 35 42
6.0 13 24 30 36
t
TLH
, t
THL
Maximum Output
Rise and Fall Time
2.0V C
L
= 50pF 30 60 75 90 ns
4.5V 7 12 15 18
6.0V 6 10 13 15
C
IN
Input Capacitance 5 10 10 10 pF
C
OUT
Output Capacitance
Outputs
15 20 20 20 pF
C
PD
Power Dissipation
Capacitance
(per gate)
(4)
Enabled 45 pF
Disabled 6