SN54HC14, SN74HC14
HEX SCHMITT-TRIGGER INVERTERS
SCLS085F
−
DECEMBER 1982
−
REVISED DECEMBER 2010
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
Test
Point
C
L
= 50 pF
(see Note A)
In-Phase
Output
Input
50%
t
PLH
50%
10%
t
PHL
Out-of-Phase
Output
90%
50%
10%
t
f
90%
t
r
Input
50%
10%
90%
t
r
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
90%
V
CC
50%
10% 0 V
t
f
t
PLH
50%
10%
90%
t
r
50%
t
PHL
90%
V
OH
50%
10%
V
OL
t
f
V
OH
V
OL
V
CC
0V
LOAD CIRCUIT
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
NOTES: A. C
L
includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR
≤
1 MHz, Z
O
= 50
Ω,
t
r
= 6 ns, t
f
= 6 ns.
C. The outputs are measured one at a time, with one input transition per measurement.
D. t
PLH
and t
PHL
are the same as t
pd
.
Figure 1. Load Circuit and Voltage Waveforms
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
