Switching characteristics, Operating characteristics, Parameter measurement information – Diodes 74HCT126 User Manual
Page 4
74HCT126
Document number: DS35337 Rev. 3 - 2
4 of 8
January 2013
© Diodes Incorporated
74HCT126
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 = 1MHz
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