74AHC257 Просмотр технического описания (PDF) - NXP Semiconductors.
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74AHC257 Datasheet PDF : 16 Pages
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Nexperia
74AHC257; 74AHCT257
Quad 2-input multiplexer; 3-state
6. Functional description
Table 3. Function table[1]
Control
Input
OE
S
nI0
nI1
H
X
X
X
L
H
X
L
X
H
L
L
X
H
X
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
7. Limiting values
Output
nY
Z
L
H
L
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
VI
input voltage
IIK
input clamping current
VI < −0.5 V
IOK
output clamping current
VO < −0.5 V or VO > VCC + 0.5 V
IO
output current
VO = −0.5 V to (VCC + 0.5 V)
−0.5
+7.0
V
−0.5
+7.0
V
[1] −20
-
mA
[1] −20
+20
mA
−25
+25
mA
ICC
IGND
Tstg
Ptot
supply current
ground current
storage temperature
total power dissipation
Tamb = −40 °C to +125 °C
-
−75
−65
[2] -
+75
mA
-
mA
+150
°C
500
mW
[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 Ptot derates linearly at 8 mW/K.
For TSSOP16 packages: above 60 °C the value of Ptot derates linearly at 5.5 mW/K.
74AHC_AHCT257_2
Product data sheet
Rev. 02 — 9 May 2008
© Nexperia B.V. 2017. All rights reserved
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