The LVQ174 is a low voltage CMOS HEX
D-TYPEFLIPFLOPWITHCLEARNON
INVERTING fabricated with sub-micron silicon
gate and double-layer metal wiring C
technology.It is idealfor low power and low noise
2
MOS
74LVQ174
M
(Micro Package)
(TSSOPPackage)
ORDERCODES :
74LVQ174M74LVQ174T
3.3Vapplications.
Information signals applied to D inputs are
transfered to the Q outputs on the positive going
edgeof the clock pulse.
Whenthe CLEAR input is held low, the Q outputs
are held low independentelyof the other inputs .
It has better speed performance at 3.3V than 5V
LS-TTL family combined with the true CMOS low
powerconsumption.
All inputs andoutputs areequipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
T
PIN CONNECTION AND IEC LOGIC SYMBOLS
February 1999
1/10
Page 2
74LVQ174
INPUT AND OUTPUT EQUIVALENTCIRCUIT
TRUTH TABLE
INPUTSOUTPUTSFUNCTION
CLE ARDCLOCKQ
LXXLCLEAR
HLL
HHH
HXQ
X:Don’tCare
PIN DESCRIPTION
PI N NoSYM BO LNAM E AND F UNCT I O N
1CLEARAsyncronous Master Reset
(ActiveLOW)
2, 5, 7, 10,
12, 15
3, 4, 6, 11,
13, 14
9CLOCKClockInput (LOW-to-HIGH,
8GNDGround(0V)
16V
n
Q0 to Q5Flip-Flop Outputs
D0 to D5DataInputs
Edge-Triggered)
CC
PositiveSupply Voltage
NO CHANGE
LOGICDIAGRAM
Thislogic diagram has not be used to estimate propagation delays
3)maxnumberofdatainputs(n)switching.(n-1)switching0Vto3.3V.Inputs under testswitching: 3.3Vtothreshold(V
=25oC-40 to 85oC
A
Min. Typ. Max.Min. Max.
0.30.8
-0.8-0.3
),0V tothreshold(V
ILD
).f=1MHz
IHD
V
4/10
Page 5
74LVQ174
AC ELECTRICAL CHARACTERISTICS
= 50 pF, RL= 500 Ω, Input tr=tf=3 ns)
(C
L
SymbolParameterTest ConditionValueUnit
V
CC
(V)
t
PropagationDelay Time
PLH
t
CKto Q
PHL
PropagationDelay Time
t
PHL
CLRtoQ
CLRpulseWidth,LOW2.71.07.010.0
t
w(L)
t
CKpulse Width,HIGHor
w
LOW,2.7
SetupTime D to CKHIGH
t
sL
t
orLOW
sH
HoldTimeD toCK HIGH
t
hL
orLOW
t
hH
t
f
t
t
1) Skewisdefinedas theabsolutevalue ofthedifferencebetweentheactualpropagation delay foranytwooutputsofthesamedeviceswitchingin the
same direction, either HIGHorLOW(t
1)CPDisdefined asthevalueoftheIC’sinternalequivalentcapacitance whichiscalculatedfromtheoperatingcurrentconsumption withoutload.(Referto
TestCircuit).Average operting current canbe obtainedbythefollowingequation. I
(opr)= CPD• VCC• fIN+ICC/6(perflipflop)
CC
=25oC-40 to 85oC
A
Min. Typ. Max.Min. Max.
5
pF
5/10
Page 6
74LVQ174
TESTCIRCUIT
CL= 50 pF or equivalent (includes jigand probe capacitance)
R
=500Ωorequivalent
L=R1
R
WAVEFORM 1: PROPAGATION DELAYS, SETUP AND HOLD TIMES, CLOCK PULSE WIDTH
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