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74HCT253N 데이터시트(PDF) 9 Page - NXP Semiconductors

부품명 74HCT253N
상세설명  Dual 4-input multiplexer; 3-state
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제조업체  NXP [NXP Semiconductors]
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74HC_HCT253_3
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 22 April 2010
9 of 17
NXP Semiconductors
74HC253; 74HCT253
Dual 4-input multiplexer; 3-state
12. Waveforms
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 6.
Propagation delays input (Sn, 1In, 2In) to output (nY) and output (nY) transition times
001aal855
VM
VM
VM
VI
Sn, 1In, 2ln input
GND
VOH
nY output
VOL
tPHL
tPLH
VM
tTLH
tTHL
10 %
90 %
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 7.
3-state output enable and disable times
001aal856
tPLZ
tPHZ
outputs
disabled
outputs
enabled
outputs
enabled
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
nOE input
VOH
VCC
GND
VOL
VI
tr
tf
GND
VM
tPZL
tPZH
90 %
VM
90 %
10 %
10 %
VM
Table 8.
Measurement points
Type
Input
Output
VM
VM
74HC253
0.5VCC
0.5VCC
74HCT253
1.3 V
1.3 V


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