SN54HC14, SN74HC14
HEX SCHMITT TRIGGER INVERTERS
SCLS085E − DECEMBER 1982 − REVISED NOVEMBER 2004
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
Test
Point
CL = 50 pF
(see Note A)
In-Phase
Output
Input
VCC
50%
tPLH
50%
10%
tPHL
Out-of-Phase
Output
90%
50%
10%
tf
90%
tr
Input
50%
10%
90%
90%
VCC
50%
10% 0 V
tf
tPLH
50%
10%
90%
tr
50%
0V
tPHL
90%
VOH
50%
10%
VOL
tf
VOH
VOL
LOAD CIRCUIT
tr
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
NOTES: A. CL 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, ZO = 50
Ω,
tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time, with one input transition per measurement.
D. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
