Diodes 74HCT125 - Manual (Page 4)

74HCT125
Document number: DS35336 Rev. 3 - 2
4 of 8
www.diodes.com
January 2013
© Diodes Incorporated
74HCT125
Switching Characteristics
Symbol Parameter Test Conditions V
CC
T
A
= +25°C -40°C to +85°C -40°C to +125°C
Unit
Min Typ Max Max Max
t
PD
Propagation
Delay A
N
to Y
N
Figure 1
C
L
= 50pF
4.5V
— 15 25 31 38 ns
t
EN
Enable Time
OE
N
to Y
N
— 15 28 35 42 ns
t
DIS
DisableTime
OE
N
to Y
N
— 15 25 31 38 ns
t
t
Transition Time — 5 12 15 18 ns
Operating Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Parameter Test Conditions
V
CC
= 5.5V
Unit
Typ
C
pd
Power Dissipation
Capacitance per Gate
f = 1 MHz 24 pF
C
I
Input Capacitance V
I
= V
CC
– or GND 3.5 pF
Parameter Measurement Information
V
CC
Inputs
V
M
V
LOAD
C
L
R
L
V∆
V
I
t
r
/t
f
4.5V 1.5V ≤6ns 3.0V 2 X V
CC
50pF 2KΩ 10% of V
CC
Voltage Waveform
Pulse Duration
Voltage Waveform
Propagation Delay Times
Notes:
A. Includes test lead and test apparatus capacitance.
B. All pulses are supplied at pulse repetition rate ≤ 1 MHz
C. The inputs are measured one at a time with one transition per measurement.
D. For the open drain device t
PLZ
and t
PZL
are the same as t
PD
E. t
PZL
is measured at V
M
.
D. t
PLZ
is measured at V
OL
+V
∆
F. A Thevenin equivalent load may be used in place of V
CC
X 2 and resistor divider
Figure 1 Load Circuit and Voltage Waveforms
TEST Condition
t
PLZ
(see Notes D and E)
t
PZL
(see Notes D and F)
Vload
Vload