74HC253 데이터 시트보기 (PDF) - NXP Semiconductors.
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74HC253 Datasheet PDF : 17 Pages
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NXP Semiconductors
12. Waveforms
74HC253; 74HCT253
Dual 4-input multiplexer; 3-state
VI
Sn, 1In, 2ln input
GND
VOH
nY output
VOL
VM
VM
tPHL
VM
tTHL
VM
10 %
tPLH
90 %
tTLH
001aal855
Fig 6.
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Propagation delays input (Sn, 1In, 2In) to output (nY) and output (nY) transition times
VI
nOE input
GND 10 %
VCC
output
LOW-to-OFF
OFF-to-LOW
VOL
output
HIGH-to-OFF
OFF-to-HIGH
VOH
GND
tr
90 %
VM
tPLZ
tPHZ
outputs
enabled
10 %
90 %
tf
tPZL
VM
tPZH
outputs
disabled
VM
outputs
enabled
001aal856
Fig 7.
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
3-state output enable and disable times
Table 8. Measurement points
Type
74HC253
74HCT253
Input
VM
0.5VCC
1.3 V
Output
VM
0.5VCC
1.3 V
74HC_HCT253_3
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 22 April 2010
© NXP B.V. 2010. All rights reserved.
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