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74VHC157MTR Datasheet(PDF) 1 Page - STMicroelectronics

Part No. 74VHC157MTR
Description  QUAD 2 CHANNEL MULTIPLEXER
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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1/12
November 2004
s
HIGH SPEED: tPD = 4.1 ns (TYP.) at VCC = 5V
s
LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA=25°C
s
HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
s
POWER DOWN PROTECTION ON INPUTS
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
s
BALANCED PROPAGATION DELAYS:
tPLH tPHL
s
OPERATING VOLTAGE RANGE:
VCC(OPR) = 2V to 5.5V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 157
s
IMPROVED LATCH-UP IMMUNITY
s
LOW NOISE: VOLP = 0.8V (MAX.)
DESCRIPTION
The 74VHC157 is an advanced high-speed
CMOS
QUAD
2-CHANNEL
MULTIPLEXER
fabricated
with
sub-micron silicon gate and
double-layer metal wiring C2MOS technology.
It consists of four 2-input digital multiplexer with
common
select and
strobe
inputs. It is
a
non-inverting multiplexer. When the STROBE
input is held high selection of data is inhibited and
all the outputs become
low. The
SELECT
decoding determines whether the A or B inputs
get routed to their corresponding Y outputs.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage. This device can be
used to interface 5V to 3V. All inputs and outputs
are equipped with protection circuits against static
discharge, giving them 2KV ESD immunity and
transient excess voltage.
74VHC157
QUAD 2 CHANNEL MULTIPLEXER
Figure 1: Pin Connection And IEC Logic Symbols
Table 1: Order Codes
PACKAGE
T & R
SOP
74VHC157MTR
TSSOP
74VHC157TTR
TSSOP
SOP
Rev. 4




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