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SN74HCT257DRE4 Scheda tecnica(PDF) 4 Page - Texas Instruments

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Il numero della parte SN74HCT257DRE4
Spiegazioni elettronici  QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN74HCT257DRE4 Scheda tecnica(HTML) 4 Page - Texas Instruments

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SN54HCT257, SN74HCT257
QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS
WITH 3STATE OUTPUTS
SCLS072D − NOVEMBER 1988 − REVISED SEPTEMBER 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HCT257
SN74HCT257
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
A or B
Y
4.5 V
20
30
45
38
tpd
A or B
Y
5.5 V
17
27
40
34
ns
tpd
A/B
Y
4.5 V
20
30
45
38
ns
A/B
Y
5.5 V
17
27
40
34
ten
OE
Y
4.5 V
20
30
45
38
ns
ten
OE
Y
5.5 V
17
27
40
34
ns
tdis
OE
Y
4.5 V
20
30
45
38
ns
tdis
OE
Y
5.5 V
17
27
40
34
ns
tt
Any
4.5 V
8
15
22
19
ns
tt
Any
5.5 V
7
14
21
17
ns
switching characteristics over recommended operating free-air temperature range, CL = 150 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HCT257
SN74HCT257
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
A or B
Y
4.5 V
22
38
57
48
tpd
A or B
Y
5.5 V
19
35
53
44
ns
tpd
A/B
Y
4.5 V
22
38
57
48
ns
A/B
Y
5.5 V
19
35
53
44
ten
OE
Y
4.5 V
23
40
60
50
ns
ten
OE
Y
5.5 V
20
38
57
48
ns
tt
Any
4.5 V
17
42
63
53
ns
tt
Any
5.5 V
14
38
57
48
ns
operating characteristics, TA = 25°C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
No load
13
pF
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.


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