SGS Thomson Microelectronics 74LVQ157 Datasheet



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

1/8

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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