MC74HC242N Просмотр технического описания (PDF) - Motorola => Freescale
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MC74HC242N Datasheet PDF : 5 Pages
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MC74HC242
A (I/O)
One of Four
Transceivers
VCC
VCC
B (I/O)
A–to–B 1
Enable
B–to–A 13
Enable
tr
Input A or B
tPHL
Output A or B
90%
50%
10%
90%
50%
10%
tTHL
Figure 2.
Figure 1. Expanded Logic Diagram
SWITCHING WAVEFORMS
tf
Output
VCC
Enable
GND
tPLH
Output A or B
Output A or B
tTLH
50%
tPZL tPLZ
50%
tPZH tPHZ
50%
50%
10%
90%
Figure 3.
VCC
GND
High
Impedance
VOL
VOH
High
Impedance
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
CL*
TEST CIRCUITS
DEVICE
UNDER
TEST
TEST
POINT
OUTPUT
1kΩ
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.
*Includes all probe and jig capacitance
Figure 5.
MOTOROLA
4
High–Speed CMOS Logic Data
DL129 — Rev 6
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