74HCT257N 查看數據表（PDF） - NXP Semiconductors.
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74HCT257N Datasheet PDF : 17 Pages
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NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
3. Ordering information
Table 1. Ordering information
Type number Package
Temperature range Name
Description
Version
74HC257N −40 °C to +125 °C DIP16
plastic dual in-line package; 16 leads (300 mil)
SOT38-4
74HCT257N
74HC257D −40 °C to +125 °C SO16
plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
74HCT257D
74HC257DB −40 °C to +125 °C
74HCT257DB
SSOP16 plastic shrink small outline package; 16 leads;
body width 5.3 mm
SOT338-1
74HC257PW −40 °C to +125 °C
74HCT257PW
TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
4. Functional diagram
1
S
2
1I0
1Y 4
3
1I1
5
2I0
6
2I1
2Y 7
11
3I0
10
3I1
3Y 9
14
4I0
13
4I1
4Y 12
15
OE
mga835
Fig 1. Logic symbol
1 G1
15
EN
2 1 MUX
4
31
5
7
6
11
9
10
14
12
13
001aad467
Fig 2. IEC logic symbol
74HC_HCT257_5
Product data sheet
Rev. 05 — 13 January 2010
© NXP B.V. 2010. All rights reserved.
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