SGS Thomson Microelectronics M74HC354 Datasheet
8 CHANNEL MULTIPLEXER/REGISTER (3 STATE)
.HIGH SPEED
tPD= 24 ns(TYP.) AT VCC=5V
.LOWPOWER DISSIPATION
ICC=4µA(MAX.) AT TA=25°C
.HIGH NOISEIMMUNITY
V
NIH=VNIL
=28%VCC(MIN.)
.OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
.SYMMETRICAL OUTPUT IMPEDANCE
|IOH|=IOL=6 mA (MIN.)
.BALANCEDPROPAGATION DELAYS
t
PLH=tPHL
.WIDE OPERATING VOLTAGE RANGE
VCC(OPR)= 2 V TO 6 V
.PIN AND FUNCTION COMPATIBLE
WITH 54/74LS354
M54HC354
M74HC354
B1R
(PlasticPackage)
M1R
(MicroPackage)
ORDER CODES :
M54HC 354F1R M74H C354M1R
M74HC 354B1R M74HC3 54C1R
F1R
(CeramicPackage)
C1R
(Chip Carrier)
DESCRIPTION
TheM54/74HC354is ahighspeed CMOS8-CHANNEL MULTIPLEXER/REGISTER (3-state) fabricated in silicongate C2MOS technology. It has the
same high speed performance of LSTTL combined
with trueCMOS low consumption.
Thisdevicecontains an 8channeldigitalmultiplexer
with an8-bit inputdata registerand a 3-bit address
inputregisterwith 3-state outputs. The one of eight
inputdata will be provided on the Y output pin (noninverted output) and W output pin(inverted output)
determined by the addressdata.
The information at the data inputs (D0 to D7) is
storedin the 8-bit latchat the negative pulse on DC
input. The informationat the address inputs (S0 to
S2) isstored in the 3-bitlatch at the negative pulse
on SCinput. Theseoutputsare disabled to behighimpedance when input G1 is heldhigh, input G2 is
heldhigh orinputG3 is held low.Thisdeviceissuitablefor interfacing withbuslinesin a busorganized
system.
The M54/74HC354 is similar in function to the
M54/74HC356, which has an 8-bit flip-flop as the
data register instead of an 8-bit latch.All inputs are
equipped with protection circuits against static discharge and transientexcess voltage.
PIN CONNECTIONS(top view)
NC =
No Internal
Connection
April1993
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M54/M74HC354
INPUT AND OUTPUT EQUIVALENT CIRCUIT
LOGIC DIAGRAM
TRUT H TABLE OF INTERNAL LAT CH
INPUTS OUTPUTS
DSTQ Q
LHLH
HHHL
X L Qn Qn
X:DON’TCARE
Qn:DATA STORED AT THE TRAILINGEDGE
OFTHE MOSTRECENTST PULSE.
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M54/M74HC354
TRUTH TABLE
INPUTS OUTPUTS
SELECT *
S2 S1 S0 G1 G2 G3
XXXXHXXZZ
XXXXXHXZZ
XXXXXXLZZ
LLLLLLHD0D0
L L L H L L H D0n D0n
LLHLLLHD1D1
L L H H L L H D1n D1n
L H L L L L H D2 D2
LHLHLLHD2nD2n
LHHLLLHD3D3
L H H H L L H D3n D3n
HLLLLLHD4D4
H L L H L L H D4n D4n
HLHLLLHD5D5
H L H H L L H D5n D5n
HHLLLLHD6D6
HHLHLLHD6nD6n
HHHLL LHD7D7
H H H H L L H D7n D7n
X:DON’TCARE Z:HIGHIMPEDANCE *:THISCOLUMNSHOWSTHEINPUTADDRESSSETUPWITHSC LOW
D0n....D7n:THELEVELOFSTEADY-STATEINPUTSAT INPUTDOTHROUGH D7,RESPECTIVELY,BEFORETHEMOSTRECENT LOWTO
HIGHTRANSITIONOFDATA CONTROL.
DC
OUTPUT ENABLES
WY
PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
8, 7, 6, 5,
4, 3, 2, 1
9 DC Data Enable Input (Active
11 SC Latch Enable Input
14, 13, 12 SO, S1, S2 Select Inputs
15, 16 G1, G2 Output Enable Inputs
17 G3 Output Enable Input
18 W 3 State Multiplexer Output
19 Y 3 State Multiplexer Output
10 GND Ground (0V)
20 V
D0 to D7 Data Inputs
LOW)
(Active LOW)
(Active LOW)
(Active HIGH)
(Active LOW)
(Active HIGH)
CC
Positive Supply Voltage
IEC LOGIC SYMBOL
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M54/M74HC354
ABSOLU TE M AXIMU M R AT ING
Symbol Parameter Value Unit
V
CC
V
V
O
I
IK
I
OK
I
O
I
or I
CC
P
D
T
stg
T
AbsoluteMaximumRatingsarethose values beyond whichdamage tothedevicemayoccur.Functional operationunder theseconditionisnotimplied.
(*)500 mW:≅ 65oC derate to300 mW by 10mW/oC: 65oCto85oC
RECO MM ENDED OPERATI N G CO NDI TIONS
Symbol Parameter Value Unit
V
CC
V
I
V
O
T
op
t
r,tf
Supply Voltage -0.5 to +7 V
DC Input Voltage -0.5 to VCC+ 0.5 V
I
DC Output Voltage -0.5 to VCC+ 0.5 V
DC Input Diode Current ± 20 mA
DC Output Diode Current ± 20 mA
DC Output Source Sink Current Per Output Pin ± 35 mA
DC VCCor Ground Current ± 70 mA
GND
Power Dissipation 500 (*) mW
Storage Temperature -65 to +150
Lead Temperature (10 sec) 300
L
Supply Voltage 2 to 6 V
Input Voltage 0 to V
Output Voltage 0 to V
Operating Temperature: M54HC Series
M74HC Series
CC
CC
-55 to +125
-40 to +85
Input Rise and Fall Time VCC= 2 V 0 to 1000 ns
V
= 4.5 V 0 to 500
CC
V
= 6 V 0 to 400
CC
o
C
o
C
V
V
o
C
o
C
4/12
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