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MC74HCT125A Datasheet, PDF (4/8 Pages) ON Semiconductor – Quad 3-State Noninverting Buffer with LSTTL Compatible Inputs
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MC74HCT125A
SWITCHING WAVEFORMS
tr
INPUT A (VI)
tPLH
OUTPUT Y
90%
10V%M
90%
10V%M
tTLH
VI = GND to 3.0 V
VM = 1.3 V
Figure 1.
tf
VCC
GND
tPHL
tTHL
OE (VI)
VM
OUTPUT Y
OUTPUT Y
VM
tPZH tPHZ
VM
Figure 2.
VCC
GND
HIGH
IMPEDANCE
10% VOL
90% VOH
HIGH
IMPEDANCE
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
*Includes all probe and jig capacitance
Figure 3. Test Circuit
OE
A
DEVICE
UNDER
TEST
TEST POINT
1 kW
OUTPUT
CL *
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ and tPZH.
*Includes all probe and jig capacitance
Figure 4. Test Circuit
VCC
Y
(1/4 OF THE DEVICE)
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