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| 74HC_HCT257_15 Datasheet, PDF (9/18 Pages) NXP Semiconductors – Quad 2-input multiplexer; 3-state | |||
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NXP Semiconductors
11. Waveforms
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
9,
LQSXW
6Q,Q,
*1'
92+
RXWSXW
Q<
92/
90
W3+/
90
W 7+/
90
90
W 3/+
W 7/+
DDG
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 (S, nI0, nI1) to output (nY) and output (nY) transition times
9,
2(LQSXW
*1'
RXWSXW 9&&
/2:WR2))
2))WR/2:
92/
RXWSXW 92+
+,*+WR2))
2))WR+,*+
*1'
WU
90
W3/=
W3+=
RXWSXWV
HQDEOHG
WI
W3=/
90
W3=+
RXWSXWV
GLVDEOHG
90
RXWSXWV
HQDEOHG
DDF
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
74HC257
74HCT257
Input
VM
0.5VCC
1.3 V
Output
VM
0.5VCC
1.3 V
74HC_HCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 â 26 January 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
9 of 18
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