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74AHC257 Datasheet(PDF) 6 Page - NXP Semiconductors

No. de pieza 74AHC257
Descripción Electrónicos  Quad 2-input multiplexer; 3-state
Download  20 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74AHC257 Datasheet(HTML) 6 Page - NXP Semiconductors

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2000 Apr 03
6
Philips Semiconductors
Product specification
Quad 2-input multiplexer; 3-state
74AHC257;
74AHCT257
RECOMMENDED OPERATING CONDITIONS
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134); voltages are referenced to GND (ground = 0 V).
Notes
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. For SO packages: above 70
°C the value of PD derates linearly with 8 mW/K.
For TSSOP packages: above 60
°C the value of PD derates linearly with 5.5 mW/K.
SYMBOL
PARAMETER
CONDITIONS
74AHC
74AHCT
UNIT
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
VCC
DC supply voltage
2.0
5.0
5.5
4.5
5.0
5.5
V
VI
input voltage
0
5.5
0
5.5
V
VO
output voltage
0
VCC
0
VCC
V
Tamb
operating ambient temperature
see DC and AC
characteristics per
device
−40
+25
+85
−40
+25
+85
°C
−40
+25
+125
−40
+25
+125
°C
tr,tf
(
∆t/∆V)
input rise and fall time ratios
VCC = 3.3 ±0.3 V
−−
100
−−−
ns/V
VCC =5 ±0.5 V
−−
20
−−
20
ns/V
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX. UNIT
VCC
DC supply voltage
−0.5
+7.0
V
VI
input voltage
−0.5
+7.0
V
IIK
DC input diode current
VI < −0.5 V; note 1
−−20
mA
IOK
DC output clamping diode
current
VO < −0.5 V or VO >VCC + 0.5 V; note 1
−±20
mA
IO
DC output sink current
−0.5V<VO <VCC + 0.5 V
−±25
mA
ICC;IGND
DC VCC or GND current
−±75
mA
Tstg
storage temperature
−65
+150
°C
PD
power dissipation per package
for temperature range:
−40 to +125 °C; note 2
500
mW


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