|
MC74HC165A_05 Datasheet, PDF (7/12 Pages) ON Semiconductor – 8−Bit Serial or Parallel−Input/ Serial−Output Shift Register High−Performance Silicon−Gate CMOS | |||
|
◁ |
MC74HC165A
SWITCHING WAVEFORMS
CLOCK
OR CLOCK INHIBIT
tr
90%
50%
10%
tw
QH OR QH
90%
50%
10%
1/fmax
tPLH
tTLH
tf
tPHL
tTHL
VCC
GND
tw
SERIAL SHIFT/
50%
PARALLEL LOAD
tPLH
QH OR QH
50%
VCC
50%
GND
tPHL
Figure 3. SerialâShirt Mode
Figure 4. ParallelâLoad Mode
tr
INPUT H
tPLH
QH OR QH
90%
50%
10%
90%
50%
10%
tTLH
tf
VCC
GND
tPHL
tTHL
Figure 5. ParallelâLoad Mode
INPUTS AâH
SERIAL SHIFT/
PARALLEL LOAD
VALID
VCC
50%
GND
tsu
th
VCC
GND
ASYNCHRONOUS PARALLEL
LOAD
(LEVEL SENSITIVE)
Figure 6. ParallelâLoad Mode
VALID
SERIAL SHIFT/
VCC
INPUT SA
50%
VCC
PARALLEL LOAD
50%
GND
GND
tsu
th
tsu
th
CLOCK
VCC
CLOCK
OR CLOCK INHIBIT
50%
VCC
OR CLOCK INHIBIT
50%
GND
GND
Figure 7. SerialâShift Mode
Figure 8. SerialâShift Mode
CLOCK INHIBIT
CLOCK 2 INHIBITED
VCC
50%
GND
tsu
trec
VCC
CLOCK
50%
GND
Figure 9. SerialâShift, ClockâInhibit Mode
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
CL*
*Includes all probe and jig capacitance
Figure 10. Test Circuit
http://onsemi.com
7
|
▷ |