M54HC157D ,RAD-HARD QUAD 2 CHANNEL MULTIPLEXERM54HC157RAD-HARD QUAD 2 CHANNEL MULTIPLEXER
M54HC157D
RAD-HARD QUAD 2 CHANNEL MULTIPLEXER
1/9June 2004 HIGH SPEED:
tPD= 10ns (TYP.)at VCC =6V LOW POWER DISSIPATION:CC =4μA(MAX.)atTA =25°C HIGH NOISE IMMUNITY:NIH =VNIL= 28%VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|= IOL =4mA (MIN) BALANCED PROPAGATION DELAYS:
tPLH≅ tPHL WIDE OPERATING VOLTAGE RANGE:CC (OPR)= 2Vto 6V PIN AND FUNCTION COMPATIBLE WITH SERIES 157 SPACE GRADE-1: ESA SCC QUALIFIED 50 krad QUALIFIED, 100 krad AVAILABLE ON
REQUEST NO SEL UNDER HIGH LET HEAVY IONS
IRRADIATION DEVICE FULLY COMPLIANT WITH
SCC-9408-057
DESCRIPTIONThe M54HC157isan high speed CMOS QUAD2
CHANNEL MULTIPLEXER fabricated with silicon
gateC2 MOS technology.
These device consist of four 2-input digital
multiplexer with common select and strobe inputs.
When the STROBE inputis held high, selectionof
datais inhibited andall the outputs become low.
The SELECT decoding determines whether theAB inputs get routedto their correspondingY
outputs.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M54HC157RAD-HARD QUAD2 CHANNEL MULTIPLEXER
PIN CONNECTION
ORDER CODESRev.1
M54HC1572/9
Figure1: IEC Logic Symbols
Figure2: Input And Output Equivalent Circuit Table1: Pin Description
Table2: Truth Table: Don’t Care
M54HC1573/9
Figure3: Logic Diagram
Table3: Absolute Maximum RatingsAbsoluteMaximum Ratingsare those values beyond which damagetothe device mayoccur.Functional operation under these conditionsis
not implied
Table4: Recommended Operating Conditions
M54HC1574/9
Table5: DC Specifications: Applicable onlyto DIR,G,G input
Table6: AC Electrical Characteristics (CL=50 pF, Inputtr =tf= 6ns)
M54HC1575/9
Table7: Capacitive Characteristics CPD isdefinedasthe valueofthe IC’s internal equivalent capacitance whichis calculatedfrom theoperating current consumption without
load. (Referto TestCircuit). Average operating currentcanbe obtainedbythe following equation. ICC(opr) =CPD xVCCxfIN +ICC/4(per chan-
nel)
Figure4: Test Circuit= 50pFor equivalent (includesjig and probe capacitance) =ZOUTof pulse generator (typically 50Ω)
Figure5: Waveform- Propagation Delay Times (f=1MHz; 50% duty cycle)
