HC157 ,HC158 QUAD 2 CHANNEL MULTIPLEXER INV. HC157 QUAD 2 CHANNEL MULTIPLEXERLOGIC DIAGRAM2/974VHC157
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HC157-HC158
QUAD 2 CHANNEL MULTIPLEXER
74VHC157QUAD 2 CHANNEL MULTIPLEXER
PRELIMINARY DATAJune 1999 HIGH SPEED:tPD =4.1ns (TYP.)at VCC =5V LOWPOWER DISSIPATION:
ICC =4 μA (MAX.)atTA =25oC HIGH NOISE IMMUNITY:
VNIH =VNIL =28% VCC (MIN.) POWERDOWN PROTECTIONON INPUTS SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|=IOL=8 mA(MIN) BALANCED PROPAGATIONDELAYS:
tPLH≅ tPHL OPERATINGVOLTAGERANGE:
VCC (OPR)= 2Vto 5.5V PIN AND FUNCTION COMPATIBLE WITH SERIES157 IMPROVEDLATCH-UP IMMUNITY LOWNOISE: VOLP= 0.8V (Max.)
DESCRIPTIONThe 74VHC157is an high-speed CMOS QUAD
2-CHANNEL MULTIPLEXER fabricated with
sub-micron silicon gate and double-layer metal
wiringC2 MOS technology. consistsof four 2-input digital multiplexers with
common select and strobe inputs.It isa
non-inverting multiplexer. When the STROBE
inputis held high, selectionof datais inhibited
and all the outputs become low. The SELECT
decoding determines whether theAorB inputs
get routedto their correspondingY outputs.
Power down protectionis provided on all inputs
and0to 7V can be acceptedon inputs with no
regardto the supply voltage. This device canbe
usedto interface 5Vto 3V.All inputs and outputs
are equipped with protectioncircuits against static
discharge, giving them 2KV ESD immunity and
transient excess voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS(Micro Package)
(TSSOP Package)
ORDER CODES:74VHC157M 74VHC157T
1/9
INPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUT OUTPUT
STROBE SELECT A B Y X XXL
LLLX L H X H X L L X H H
X:”H” or”L”
PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION SELECT Common Data Select Input
2,5,11,14 1Ato4A Data Inputs From
SourceA
3,6,10,13 1Bto4B Data Inputs From
SourceB
4,7,9,12 1Yto4Y Multiplexer Outputs STROBE Strobe Input GND Ground (0V) VCC Positive Supply Voltage
LOGIC DIAGRAM
74VHC1572/9
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value UnitVCC Supply Voltage -0.5to+7.0 V DC Input Voltage -0.5to+7.0 V DC Output Voltage -0.5toVCC +0.5 V
IIK DC Input Diode Current -20 mA
IOK DC Output Diode Current ±20 mA DC Output Current ±25 mA
ICCorIGND DC VCCor Ground Current ±50 mA
Tstg Storage Temperature -65 to+150 oC Lead Temperature (10 sec) 300 oC
AbsoluteMaximumRatingsarethosevalues beyond whichdamage tothedevicemayoccur. Functionaloperationunderthese condition isnot implied.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value UnitVCC Supply Voltage 2.0to5.5 V Input Voltage 0to5.5 V Output Voltage 0toVCC V
Top Operating Temperature -40 to+85 oC
dt/dv Input Rise and Fall Time (see note1) (VCC =3.3± 0.3V)
(VCC =5.0± 0.5V)
0to100
0to20
ns/V
ns/V
1)VINfrom30%to70%ofVCC
SPECIFICATIONS
Symbol Parameter Test Conditions Value Unit
VCC(V)
=25oC -40to85oC
Min. Typ. Max. Min. Max.VIH High Level Input
Voltage
2.0 1.5 1.5 V
3.0to5.5 0.7VCC 0.7VCC
VIL Low Level Input
Voltage
2.0 0.5 0.5 V
3.0to5.5 0.3VCC 0.3VCC
VOH High Level Output
Voltage
2.0 IO=-50μA1.9 2.0 1.9
3.0 IO=-50μA2.9 3.0 2.9
4.5 IO=-50μA4.4 4.5 4.4
3.0 IO=-4mA 2.58 2.48
4.5 IO=-8mA 3.94 3.8
VOL Low Level Output
Voltage
2.0 IO=50μA 0.0 0.1 0.1
3.0 IO=50μA 0.0 0.1 0.1
4.5 IO=50μA 0.0 0.1 0.1
3.0 IO=4mA 0.36 0.44
4.5 IO=8mA 0.36 0.44 Input Leakage Current 0 to5.5 VI =5.5VorGND ±0.1 ±1.0 μA
ICC Quiescent Supply
Current
5.5 VI =VCC orGND 4 40 μA
74VHC1573/9
CAPACITIVE CHARACTERISTICS
Symbol Parameter Test Conditions Value Unit =25oC -40to85oC
Min. Typ. Max. Min. Max.CIN Input Capacitance 4 10 10 pF
CPD Power Dissipation
Capacitance (note1) pF
1)CPDisdefinedasthevalueoftheIC’sinternalequivalentcapacitance whichiscalculatedfromtheoperatingcurrentconsumption withoutload.(Referto
TestCircuit).Average operatingcurrent canbeobtained bythefollowingequation. ICC(opr)= CPD• VCC• fIN+ICC/4(per Channel)
ELECTRICAL CHARACTERISTICS (Inputtr =tf=3 ns)
Symbol Parameter Test Condition Value Unit
VCC(V)
(pF) =25oC -40to85oC
Min. Typ. Max. Min. Max.tPLH
tPHL
Propagation Delay
TimeBtoY
3.3(*) 15 6.2 9.7 1.0 11.53.3(*) 50 8.7 13.2 1.0 15.0
5.0(**) 15 4.1 6.4 1.0 7.5
5.0(**) 50 5.6 8.4 1.0 9.5
tPLH
tPHL
Propagation Delay
Time
SELECTtoY
3.3(*) 15 8.4 13.2 1.0 15.53.3(*) 50 10.9 16.7 1.0 19.0
5.0(**) 15 5.3 8.1 1.0 9.5
5.0(**) 50 6.8 10.1 1.0 11.5
tPLH
tPHL
Propagation Delay
Time
STROBEtoY
3.3(*) 15 8.7 13.6 1.0 16.03.3(*) 50 11.2 17.1 1.0 19.5
5.0(**) 15 5.6 8.6 1.0 10.0
5.0(**) 50 7.1 10.6 1.0 12.0
(*) Voltagerangeis3.3V ±0.3V
(**) Voltagerangeis 5V±0.5V
74VHC1574/9
DYNAMIC SWITCHING CHARACTERISTICS
Symbol Parameter Test Conditions Value Unit
VCC(V)
=25oC -40to85oC
Min. Typ. Max. Min. Max.VOLP Dynamic Low Voltage
Quiet Output (note1,2)
CL=50pF
0.3 0.8
VOLV -0.8 -0.3
VIHD Dynamic High Voltage
Input (note1,3)
5.0 3.5
VILD Dynamic Low Voltage
Input (note1,3)
5.0 1.5
1)Worst case package.
2)Maxnumber ofoutputs defined as(n).Datainputs aredriven0Vto5.0V,(n -1)outputs switching andoneoutput atGND.
3)Maxnumber ofdatainputs(n)switching.(n-1)switching0Vto5.0V.Inputsunder testswitching: 5.0Vtothreshold(VILD),0Vtothreshold(VIHD),f=1MHz.
TEST CIRCUIT =15/50 pForequivalent (includes jigand probecapacitance)
RT=ZOUTofpulsegenerator (typically50Ω)
74VHC1575/9
WAVEFORM1: PROPAGATION DELAYS FOR INVERTING CONDITIONS
WAVEFORM2: PROPAGATION DELAYS FOR NON-INVERTING CONDITIONS
74VHC1576/9
