M54HC157

Features:

·HIGH SPEED tPD = 10 ns (TYP.) AT VCC = 5 V
·LOWPOWER DISSIPATION ICC = 4 mA (MAX.) AT TA = 25 °C
·HIGH NOISE IMMUNITY VNIH= VNIL= 28%VCC (MIN.)
·OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS
·SYMMETRICAL OUTPUT IMPEDANCE zIOHz = IOL = 4 mA (MIN.)
·BALANCEDPROPAGATION DELAYS tPLH = tPHL
·WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V
·PIN AND FUNCTION COMPATIBLE WITH 54/74LS157/158


Pinout




Specifications

Symbol	Parameter	Value	Unit
VCC	Supply Voltage	-0.5 to +7	V
VI	DC Input Voltage	-0.5 to VCC + 0.5	V
VO	DC Output Voltage	-0.5 to VCC + 0.5	V
IIK	DC Input Diode Current	± 20	mA
IOK	DC Output Diode Current	± 20	mA
IO	DC Output Source Sink Current Per Output Pin	± 25	mA
ICC or IGND	DC VCC or Ground Current	± 50	mA
PD	Power Dissipation	500 (*)	mW
Tstg	Storage Temperature	-65 to +150
TL	Lead Temperature (10 sec)	300

Description

The M54/74HC157 and the M54/74HC158 are high speed CMOS QUAD 2-CHANNEL MULTIPLEXER's fabricated with silicon gate C2MOStechnology.

M54/74HC157 and the M54/74HC158 achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation.

These devices M54/74HC157 and the M54/74HC158 consist of four 2-input digital multiplexers with common select and strobe inputs. The HC158 is an inverting multiplexer while the HC157 is a non-inverting multiplexer. When the STROBE input is held High, selection of data is inhibited and all the outputs become Low in the M74HC157 and High in the M74HC158. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. All inputs are equipped with protection circuits against static discharge and transient excess voltage.