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74AHC_AHCT257 Datenblatt(PDF) 5 Page - NXP Semiconductors

Teilenummer 74AHC_AHCT257
Bauteilbeschribung  Quad 2-input multiplexer; 3-state
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
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74AHC_AHCT257 Datenblatt(HTML) 5 Page - NXP Semiconductors

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74AHC_AHCT257_2
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 — 9 May 2008
5 of 16
NXP Semiconductors
74AHC257; 74AHCT257
Quad 2-input multiplexer; 3-state
6.
Functional description
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
7.
Limiting values
[1]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2]
For SO16 packages: above 70
°C the value of P
tot derates linearly at 8 mW/K.
For TSSOP16 packages: above 60
°C the value of P
tot derates linearly at 5.5 mW/K.
Table 3.
Function table[1]
Control
Input
Output
OE
S
nI0
nI1
nY
HX
X
X
Z
LH
X
L
L
XH
H
LL
X
L
HX
H
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
Parameter
Conditions
Min
Max
Unit
VCC
supply voltage
−0.5
+7.0
V
VI
input voltage
−0.5
+7.0
V
IIK
input clamping current
VI < −0.5 V
[1]
−20
-
mA
IOK
output clamping current
VO < −0.5 V or VO >VCC + 0.5 V
[1]
−20
+20
mA
IO
output current
VO = −0.5 V to (VCC + 0.5 V)
−25
+25
mA
ICC
supply current
-
+75
mA
IGND
ground current
−75
-
mA
Tstg
storage temperature
−65
+150
°C
Ptot
total power dissipation
Tamb = −40 °C to +125 °C
[2] -
500
mW


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