74HC257 查看數據表（PDF） - NXP Semiconductors.
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74HC257 Datasheet PDF : 17 Pages
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NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
1S
23
1I0 1I1
56
2I0 2I1
11 10
3I0 3I1
14 13
4I0 4I1
SELECTOR
15 OE
Fig 3. Functional diagram
3-STATE MULTIPLEXER OUTPUTS
1Y
2Y
3Y
4Y
4
7
9
12
mgr280
1I0
1I1
2I0
2I1
3I0
3I1
4I0
4I1
OE
S
Fig 4. Logic diagram
1Y
2Y
3Y
4Y
001aad468
74HC_HCT257_5
Product data sheet
Rev. 05 — 13 January 2010
© NXP B.V. 2010. All rights reserved.
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