Datasheet 74LVX157 Datasheet (ST)

74LVX157

LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER

WITH 5V TOLERANT INPUTS

■ HIGH SPEED:

t

= 5.1 ns (TYP.) at V

PD

■ 5V TOLERANT INPUTS

■ INPUT VOLTAG E LEVEL:

V

=0.8V , VIH=2V at VCC=3V

IL

■ LOW POWER DISSIPATION:

I

= 2 µA (MAX.) at TA=25°C

CC

■ LOW NOISE:

V

= 0.3V (TYP.) at VCC = 3.3V

OLP

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

| = IOL = 4mA (MIN)

OH

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

PHL

■ OPERATING VOLTAGE RANGE:

V

(OPR) = 2V to 3.6V (1.2V Data Retention)

CC

■ PIN AND FUNCTION COMPATIBLE WITH

CC

= 3.3V

74 SERIES 157

■ IMPROVED LATCH-UP IMMUNITY

■ POWER DOWN PROTECTION ON INPUTS

DESCRIPTION

The 74LVX157 i s a low voltage CMOS QUAD 2
CHANNEL MULTIPLEXER fabricated with
sub-micron silicon gate and double-layer metal
wiring C

2

MOS technology. It is ideal for low
power, battery operated and low noise 3.3V
applications.
It consists of four 2-input digital multiplexers with
common select and strobe inputs. When STROBE

TSSOPSOP

Table 1: Order Codes

PACKAGE T & R

SOP 74LVX157MTR

TSSOP 74LVX157TTR

input is held high, selection of data is inhibited and
all the outputs become low. The SELECT
decoding determines whether the A or B inputs
get routed to their corresponding Y outputs.
Power down protection is provided on all inputs
and 0 to 7V can be accepted on inputs with no
regard to the supply voltage.
This device can be used to interface 5V to 3V
system. It combines high speed performance with
the true CMOS low power consumption.
All inputs and outputs are equipped with
protection circuits against static disc harge, giving
them 2KV ESD immunity and transient excess
voltage.

Figure 1: Pin Connection And IEC Logic Symbols

Rev. 3

1/12August 2004

74LVX157

Figure 2: Input Equivalent Circuit Table 2: Pin Description

PIN N° SYMBOL NAME AND FUNCTION

1 SELECT Common Data Select

Inputs

2, 5, 11, 14 1A to 4A Data Inputs From Source

A

3, 6, 10, 13 1B to 4B Data Inputs From Source

B

4, 7, 9, 12 1Y to 4Y Multiplexer Outputs

15 STROBE Strobe Input

8 GND Ground (0V)

Positive Supply Voltage

Table 3: Truth Table

16 V

CC

INPUTS OUTPUT

STROBE

SELECT A B Y

HXXXL

LLLXL
LLHXH
LHXLL
LHXHH

X : Don’t Care

Table 4: Absolute Maximum Ratings

Symbol Parameter Value Unit

V

V

V

I

I

OK

I

or I

I

CC

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.

Supply Voltage

CC

DC Input Voltage

I

DC Output Voltage -0.5 to VCC + 0.5

O

DC Input Diode Current

IK

DC Output Diode Current
DC Output Current

O

DC VCC or Ground Current

GND

Storage Temperature

stg

Lead Temperature (10 sec)

L

-0.5 to +7.0 V

-0.5 to +7.0 V
V

- 20 mA

± 20 mA
± 25 mA
± 50 mA

-65 to +150 °C

300 °C

Table 5: Recommended Operating Conditions

Symbol Parameter Value Unit

V

V
V
T

dt/dv

1) Truth T abl e guarante ed: 1.2V to 3.6V

2) VIN from 0.8V to 2.0V

Supply Voltage (note 1)

CC

Input Voltage

I

Output Voltage 0 to V

O

Operating Temperature

op

Input Rise and Fall Time (note 2) (V

= 3.3V)

CC

2 to 3.6 V
0 to 5.5 V

CC

-55 to 125 °C
0 to 100 ns/V

2/12

V

Table 6: DC Specifications

Symbol Parameter

V

V

V

High Level Input

IH

Voltage

V

Low Level Input

IL

Voltage

High Level Output

OH

Voltage

Low Level Output

OL

Voltage

Input Leakage

I

I

Current

I

Quiescent Supply

CC

Current

74LVX157

Test Condition Value

= 25°C

T

V

CC

(V)

A

Min. Typ. Max. Min. Max. Min. Max.

2.0 1.5 1.5 1.5

3.6 2.4 2.4 2.4

2.0 0.5 0.5 0.5

3.6 0.8 0.8 0.8
=-50 µA

2.0

3.0

2.0

3.0

3.6

3.6

I

O

=-50 µA

I

O

=-4 mA

I

O

IO=50 µA
I

=50 µA

O

=4 mA

I

O

= 5V or GND

V

I

V

= VCC or GND

I

1.9 2.0 1.9 1.9

2.9 3.0 2.9 2.9

2.58 2.48 2.4

0.0 0.1 0.1 0.1

0.0 0.1 0.1 0.1

-40 to 85°C -55 to 125°C

0.36 0.44 0.55

± 0.1 ± 1 ± 1 µA

22020µA

Unit

V3.0 2.0 2.0 2.0

V3.0 0.8 0.8 0.8

V3.0

V3.0

Table 7: Dynamic Switching Characteristics

Test Condition Value

= 25°C

Symbol Parameter

V
V

V

Dynamic Low

OLP

Voltage Quiet

OLV

Output (note 1, 2)
Dynamic High

IHD

Voltage Input (note

V

CC

(V)

3.3

3.3 2
= 50 pF

C

L

T

A

Min. Typ. Max. Min. Max. Min. Max.

0.3 0.5

-0.5 -0.3

1, 3)

V

Dynamic Low

ILD

Voltage Input (note

3.3 0.8

1, 3)

1) Worst case package.

2) Max number of outp ut s defined as (n). Data inp ut s are driven 0V to 3.3V, (n-1) outputs switc hi ng and one out put at GND.

3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (V
(V

), f=1MHz.

IHD

-40 to 85°C -55 to 125°C

ILD

Unit

V

), 0V to thresho l d

3/12

74LVX157

Table 8: AC Electrical Characteristics (Input tr = tf = 3ns)

Test Condition Value

Symbol Parameter

t

PLH tPHL

Propagation Delay
Time
(A, B - Y)

t

PLH tPHL

Propagation Delay
Time
(SELECT - Y)

t

PLH tPHL

t

OSLH

t

OSHL

Propagation Delay
Time
(STROBE

Output To Output

- Y)

Skew Time (note1,

2)

V

C

CC

(V)

L

(pF)

2.7 15 6.6 12.5 1.0 15.5 1.0 16.5

2.7 50 9.1 16.0 1.0 19.0 1.0 20.0

(*)

3.3

3.3

15 5.1 7.9 1.0 9.5 1.0 11.0

(*)

50 7.6 11.4 1.0 13.0 1.0 14.0

2.7 15 8.9 16.9 1.0 20.5 1.0 21.5

2.7 50 11.4 20.4 1.0 24.0 1.0 26.0

(*)

3.3

3.3

15 7.0 11.0 1.0 13.0 1.0 14.0

(*)

50 9.5 14.5 1.0 16.5 1.0 17.5

2.7 15 9.1 17.6 1.0 20.5 1.0 21.5

2.7 50 11.6 21.1 1.0 20.4 1.0 21.4

(*)

3.3

3.3

15 7.2 11.5 1.0 13.5 1.0 14.5

(*)

50 9.7 15.0 1.0 17.0 1.0 18.0

2.7 50 0.5 1.0 1.5 1.5

(*)

3.3

50

T

Min. Typ. Max. Min. Max. Min. Max.

= 25°C

A

-40 to 85°C -55 to 125°C

0.5 1.0 1.5 1.5

Unit

ns

ns

ns

ns

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch­ing in the sa m e di rection, ei ther HIGH or LOW

2) Param eter guaran teed by design
(*) Voltage range is 3.3V ±

0.3V

Table 9: Capacitive Characteristics

Test Condition Value

= 25°C

Symbol Parameter

C

C

Input Capacitance

IN

Power Dissipation

PD

Capacitance

V

CC

(V)

3.3 4 10 10 pF

= 10MHz

3.3

f

IN

T

A

Min. Typ. Max. Min. Max. Min. Max.

20 pF

(note 1)

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I

-40 to 85°C -55 to 125°C

= CPD x VCC x f

CC(opr)

+ ICC/n (per c ircuit )

IN

Unit

4/12

74LVX157

Figure 3: Test Circuit

CL =15/50pF or equivalent (i ncludes jig an d probe capac i tance)
R

= Z

of pulse generator (typically 50Ω)

T

OUT

Figure 4: Waveform - Propagation Delays For Inverting Conditions (f=1MHz; 50% du ty cycle)

5/12

74LVX157

Figure 5: Waveform- Propagation Delays For Non-inverting Conditions (f=1MHz; 50% duty cycle)

6/12

SO-16 MECHANICAL DATA

74LVX157

DIM.

A 1.75 0.068
a1 0.1 0.25 0.004 0.010
a2 1.64 0.063

b 0.35 0.46 0.013 0.018
b1 0.19 0.25 0.007 0.010

C 0.5 0.019
c1 45° (typ.)

D 9.8 10 0.385 0.393

E 5.8 6.2 0.228 0.244

e 1.27 0.050
e3 8.89 0.350

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M 0.62 0.024

S8° (max.)

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

0016020D

7/12

74LVX157

TSSOP16 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0079

D 4.9 5 5.1 0.193 0.197 0.201

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0˚ 8˚0˚ 8˚

L 0.45 0.60 0.75 0.018 0.024 0.030

A2

A

A1

b

e

c

K

L

E

D

E1

PIN 1 IDENTIFICATION

8/12

1

0080338D

74LVX157

Tape & Reel SO-16 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 330 12.992

C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362

T 22.4 0.882

Ao 6.45 6.65 0.254 0.262
Bo 10.3 10.5 0.406 0.414
Ko 2.1 2.3 0.082 0.090
Po 3.9 4.1 0.153 0.161

P 7.9 8.1 0.311 0.319

9/12

74LVX157

Tape & Reel TSSOP16 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 330 12.992

C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362

T 22.4 0.882

Ao 6.7 6.9 0.264 0.272
Bo 5.3 5.5 0.209 0.217
Ko 1.6 1.8 0.063 0.071
Po 3.9 4.1 0.153 0.161

P 7.9 8.1 0.311 0.319

10/12

Table 10: Revision History

Date Revision Description of Change s

27-Aug-2004 3 Ordering Codes Revision - pag. 1.

74LVX157

11/12

74LVX157

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