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LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER
■ HIGHSPEED:
=5 ns(TYP.)atVCC=3.3V
t
PD
■ COMPATIBLEWITHTTL OUTPUT
■
LOW POWER DISSIPATION:
I
=4 µA (MAX.) at TA=25oC
CC
■ LOWNOISE:
=0.2V(TYP.)atVCC=3.3V
V
OLP
■ 75Ω TRANSMISSIONLINEOUTPUTDRIVE
CAPABILITY
■ SYMMETRICALOUTPUTIMPEDANCE:
|I
|=IOL=12mA (MIN)
OH
■
PCIBUSLEVELSGUARANTEEDAT24mA
■ BALANCEDPROPAGATIONDELAYS:
t
≅ t
PLH
PHL
■ OPERATINGVOLTAGERANGE:
V
(OPR)=2V to 3.6V (1.2VDataRetention)
CC
■
PINANDFUNCTION COMPATIBLEWITH
74SERIES157
■ IMPROVEDLATCH-UPIMMUNITY
DESCRIPTION
The LVQ157 is a low voltage CMOS QUAD
2-CHANNEL MULTIPLEXER fabricated with
sub-micron silicon gate and double-layer metal
wiring C
powerand lownoise 3.3Vapplications.
2
MOS technology. It is ideal for low
74LVQ157
M
(Micro Package)
(TSSOPPackage)
ORDERCODES:
74LVQ157M 74LVQ157T
It has better speed performance at 3.3V than 5V
LSTTL family combined with the true CMOS low
powerconsumption.
It consists of four 2-input digital multiplexers with
common select and strobe inputs. When strobe
input is held high selection of data is inhibit and
all the outputs become low. The SELECT
decoding determines whether the A or B inputs
get routed to theircorresponding Youtputs.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
T
PIN CONNECTION AND IEC LOGICSYMBOLS
February 1999
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74LVQ157
INPUT AND OUTPUT EQUIVALENTCIRCUIT
PIN DESCRIPTION
PI N No SYM BO L NAM E AND F U NCTIO N
1 SELECT Common Data Select Input
2,5,11,14 1Ato4A Data Inputs From
Source A
3,6,10,13 1Bto4B Data Inputs From
Source B
4,7,9,12 1Yto4Y Multiplexer Outputs
15 STROBE Strobe Input
8 GND Ground (0V)
16 V
Positive Supply Voltage
CC
TRUTH TABLE
INPUT OUTPUT
STROBE SELECT A B Y
HXXXL
LLLXL
LLHXH
LHXLL
LHXHH
X:”H” or”L”
ABSOLUTE MAXIMUM RATING
Symb o l Para met er Val u e Uni t
V
V
V
I
I
OK
I
orI
I
CC
T
T
AbsoluteMaximumRatingsarethosevaluesbeyond whichdamagetothedevicemayoccur. Functionaloperationunderthesecondition isnotimplied.
Supply Voltage -0.5to+7 V
CC
DC Input Voltage -0.5toVCC+0.5 V
I
DC Output Voltage -0.5toVCC+0.5 V
O
DC Input Diode Current ±20 mA
IK
DC Output Diode Current
DC Output Current
O
DC VCCor Ground Current
GND
Storage Temperature -65to+150
stg
Lead Temperature (10 sec) 300
L
20 mA
±
50 mA
±
200 mA
±
o
C
o
C
RECOMMENDEDOPERATINGCONDITIONS
Symb o l Para met er Value Un it
V
V
V
T
dt/dv Input Rise and Fall Time (V
1) TruthTable guaranteed: 1.2V to 3.6V
2)V
from0.8Vto 2V
IN
Supply Voltage (note 1) 2to3.6 V
CC
Input Voltage 0toV
I
Output Voltage 0toV
O
Operating Temperature: -40to+85
op
= 3V) (note 2) 0to10 ns/V
CC
CC
CC
V
V
o
C
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74LVQ157
DC SPECIFICATIONS
Symbol Parameter Test Conditions Value Unit
T
V
CC
(V)
High Level Input Voltage
V
IH
Low Level Input Voltage 0.8 0.8 V
V
IL
High Level Output
V
OH
Voltage
Low Level Output
V
OL
Voltage
Input Leakage Current
I
I
Quiescent Supply
I
CC
3.0to 3.6
3.0 V
3.0 V
3.6
(*)
=
I
V
IH
V
I
V
IH
V
IO=-50µA 2.9 2.99 2.9
or
=-12 mA 2.58 2.48
I
O
IL
(*)
IL
=-24mA 2.2
I
O
=
IO=50µA 0.002 0.1 0.1
or
=12mA 0 0.36 0.44
I
O
=24mA 0.55
I
O
VI=VCCorGND ±0.1 ±1 µA
3.6 VI=VCCorGND 4 40
Current
Dynamic Output Current
I
OLD
(note 1, 2)
I
OHD
1) Maximum test duration 2ms,one output loaded at time
2)Incident waveswitchingisguaranteed ontransmissionlineswithimpedances aslowas50 Ω.
(*)All outputs loaded.
3.6 V
=0.8Vmax 36 mA
OLD
V
=2Vmin -25 mA
OHD
=25oC -40 to 85oC
A
Min. Typ. Max. Min. Max.
2.0 2.0
µ
V
V
V
A
DYNAMICSWITCHINGCHARACTERISTICS
Symbol Parameter Test Conditions Value Unit
T
V
CC
(V)
V
V
Dynamic Low Voltage
OLP
Quiet Output (note 1, 2)
OLV
Dynamic High Voltage
V
IHD
3.3
3.3 2
C
L
=50pF
Input (note 1, 3)
Dynamic Low Voltage
V
ILD
3.3 0.8
Input (note 1, 3)
1)Worstcasepackage
2)Maxnumberof outputsdefined as(n).Datainputs aredriven0Vto 3.3V,(n-1)outputsswitching andone outputatGND
3)maxnumberof datainputs(n)switching.(n-1)switching0Vto3.3V.Inputsunder testswitching:3.3Vtothreshold(V
=25oC -40 to 85oC
A
Min. Typ. Max. Min. Max.
0.2 0.8
-0.8 0.2
),0Vtothreshold(V
ILD
).f=1MHz
IHD
V
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