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74LCX257 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. 74LCX257
Description  LOW VOLTAGE CMOS QUAD 2 CHANNEL MULTIPLEXER WITH 5V TOLERANT INPUTS AND OUTPUTS (3-STATE)
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74LCX257 Datasheet(HTML) 1 Page - STMicroelectronics

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September 2004
s
5V TOLERANT INPUTS AND OUTPUTS
s
HIGH SPEED:
tPD = 6.0 ns (MAX.) at VCC = 3V
s
POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN) at VCC = 3V
s
PCI BUS LEVELS GUARANTEED AT 24 mA
s
BALANCED PROPAGATION DELAYS:
tPLH tPHL
s
OPERATING VOLTAGE RANGE:
VCC(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 257
s
LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
s
ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
DESCRIPTION
The 74LCX257 is a low voltage CMOS QUAD 2
CHANNEL MULTIPLEXER (3-STATE) fabricated
with sub-micron silicon gate and double-layer
metal wiring C2MOS technology. It is ideal for low
power and high speed 3.3V applications; it can be
interfaced to 5V signal environment for both inputs
and outputs.
It is composed of four independent 2 channel
multiplexers with common SELECT and ENABLE
(OE) INPUT. The 74LCX257 is a non-inverting
multiplexer. When the ENABLE INPUT is held
"High", all outputs become in high impedance
state. If SELECT INPUT is held "Low", "A" data is
selected, when SELECT INPUT is "High", "B" data
is chosen.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
All
inputs
and
outputs
are
equipped
with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74LCX257
LOW VOLTAGE CMOS QUAD 2 CHANNEL MULTIPLEXER
WITH 5V TOLERANT INPUTS AND OUTPUTS (3-STATE)
Figure 1: Pin Connection And IEC Logic Symbols
Table 1: Order Codes
PACKAGE
T & R
SOP
74LCX257MTR
TSSOP
74LCX257TTR
TSSOP
SOP
Rev. 4


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