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M74HC257 fiches techniques PDF

ST Microelectronics - QUAD 2 CHANNEL MULTIPLEXER

Numéro de référence M74HC257
Description QUAD 2 CHANNEL MULTIPLEXER
Fabricant ST Microelectronics 
Logo ST Microelectronics 





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M74HC257 fiche technique
M74HC257
QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
s HIGH SPEED :
tPD = 11 ns (TYP.) at VCC = 6V
s LOW POWER DISSIPATION:
ICC =4µA(MAX.) at TA=25°C
s HIGH NOISE IMMUNITY:
)VNIH = VNIL = 28 % VCC (MIN.)
t(ss SYMMETRICAL OUTPUT IMPEDANCE:
c|IOH| = IOL = 6mA (MIN)
us BALANCED PROPAGATION DELAYS:
dtPLH tPHL
ros WIDE OPERATING VOLTAGE RANGE:
PVCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
te74 SERIES 257
oleDESCRIPTION
sThe M74HC257 is an high speed CMOS QUAD 2
bCHANNEL MULTIPLEXER (3-STATE) fabricated
Owith silicon gate C2MOS technology.
-This IC is composed of an independent 2-channel
t(s)multiplexer with common SELECT and ENABLE
(OE) input.
cThe M74HC257 is a non-inverting multiplexer.
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
M74HC257B1R
M74HC257M1R
T&R
M74HC257RM13TR
M74HC257TTR
When the ENABLE input is held "High", outputs of
the IC become in a High-Impedance state. If
SELECT input is held low, "A" data is selected,
when SELECT is high , "B" data is chosen.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
Obsolete ProduPIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
1/11

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