Philips 74lv157 DATASHEETS

INTEGRATED CIRCUITS

74LV157

Quad 2-input multiplexer

Product specification Supersedes data of 1997 May 15 IC24 Data Handbook

 

1998 Apr 30

Philips Semiconductors Product specification

74L V157Quad 2-input multiplexer

FEA TURES

•Optimized for low voltage applications: 1.0 to 3.6 V

•Accepts TTL input levels between V

•Typical V

T

amb

•Typical V

T

amb

(output ground bounce) < 0.8 V at V

OLP

= 25°C

(output VOH undershoot) > 2 V at V

OHV

= 25°C

= 2.7 V and V

CC

= 3.6 V

CC

= 3.3 V,

•Output capability: standard

•I

category: MSI

CC

DESCRIPTION

The 74LV157 is a low-voltage CMOS device and is pin and function compatible with 74HC/HCT157.

The 74LV157 is a quad 2-input multiplexer which selects 4 bits of data from two sources under the control of a common data select input (S).

QUICK REFERENCE DATA

GND = 0 V; T

SYMBOL

t

NOTES:

1. C

is used to determine the dynamic power dissipation (PD in µW)

PD

= CPD × V

P

D

f

= input frequency in MHz; CL = output load capacitance in pF;

i

= output frequency in MHz; VCC = supply voltage in V;

f

o

 (C

L

= 25°C; tr = tf≤ 2.5 ns

amb

PHL/tPLH

C

I

C

PD

2

× fi  (CL × V

CC

2

× V

× fo) = sum of the outputs.

CC

PARAMETER CONDITIONS TYPICAL UNIT

Propagation delay nl0, nl1, to nY E to nY S to nY

Input capacitance 3.5 pF Power dissipation capacitance per gate VI = GND to V

2

× fo) where:

CC

The four outputs present the selected data in the true (non-inverted) form. The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions.

Moving the data from two groups of registers to four common output buses is a common use of the 74LV157. The state of the common data select input (S) determines the particular register from which the data comes. It can also be used as function generator.

The device is useful for implementing highly irregular logic by generating any four of the 16 different functions of two variables with one variable common.

The 74LV157 is the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S.

CL = 15 pF; VCC = 3.3 V

10 11 12

CC

1

70 pF

ns

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. #

16-Pin Plastic DIL –40°C to +125°C 74LV157 N 74LV157 N SOT38-4 16-Pin Plastic SO –40°C to +125°C 74LV157 D 74LV157 D SOT109-1 16-Pin Plastic SSOP Type II –40°C to +125°C 74LV157 DB 74LV157 DB SOT338-1 16-Pin Plastic TSSOP Type I –40°C to +125°C 74LV157 PW 74LV157PW DH SOT403-1

1998 Apr 30 853–1920 19318

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Philips Semiconductors Product specification

Quad 2-input multiplexer

PIN CONFIGURATION

1

S

2

1I

0

3

1I

1

4

1Y

5

2I

0

6

2I

1

7

2Y

GND

8

PIN DESCRIPTION

NUMBER

1 S Common data select input 2, 5, 11, 14 1l0 to 4l 3, 6, 10, 13 1l1 to 4l 4, 7, 9, 12 1Y to 4Y Multiplexer outputs 8 GND Ground (0 V) 15 E Enable inputs (active LOW) 16 V

SYMBOL FUNCTION

Data inputs from source 0

0

Data inputs from source 1

1

CC

Positive supply voltage

16

15

14

13

12

11

10

9

SV00563

V

CC

E

4I

0

4I

1

4Y

3I

0

3I

1

3Y

LOGIC SYMBOL

35

2

1I

0

1

15

S

E

FUNCTIONAL DIAGRAM

2

1I

0

3

1I

1

5

2I

0

6

2I

1

11

3I

10

3I

SELECTOR

0 1

74LV157

13

1411

3I

0

1

3Y

9

MULTIPLEXER

OUTPUTS

10

4I

3I

4Y

12

4I

0

1

SV00564

1Y

2Y

3Y

4

7

9

6

2I

0

2Y

1Y

7

4

LOGIC SYMBOL (IEEE/IEC)

1

15

2

3

5

6

11

10

14

13

G1

EN

MUX

1

12

SV00565

14

4I

0

13

4I

1

S

115

4

7

9

E

4Y

SV00566

12

1998 Apr 30

3

Philips Semiconductors Product specification

Quad 2-input multiplexer

74LV157

RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT

V

T

amb

tr, t

NOTE:

1. The LV is guaranteed to function down to V

ABSOLUTE MAXIMUM RATINGS

In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0 V).

SYMBOL

V

I

DC supply voltage See Note 1 1.0 3.3 3.6 V

CC

Input voltage 0 – V

I

Output voltage 0 – V

O

Operating ambient temperature range in free air

Input rise and fall times

f

CC

See DC and AC

characteristics

VCC = 1.0V to 2.0V VCC = 2.0V to 2.7V V

= 2.7V to 3.6V

CC

= 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 3.6V.

–40 –40

– – –

1, 2

PARAMETER CONDITIONS RATING UNIT

CC

DC supply voltage –0.5 to +4.6 V DC input diode current VI < –0.5 or VI > VCC + 0.5V 20 mA

IK

DC output diode current VO < –0.5 or VO > VCC + 0.5V 50 mA

OK

DC output source or sink current

O

– standard outputs

–0.5V < VO < VCC + 0.5V

25

CC CC

+85

+125

500 200 100

ns/V

V V

°C

mA

I

P

GND

T

TOT

stg

DC VCC or GND current for types with

,

– standard outputs 50

CC

Storage temperature range –65 to +150 °C Power dissipation per package

– plastic DIL – plastic mini-pack (SO) – plastic shrink mini-pack (SSOP and TSSOP)

for temperature range: –40 to +125°C above +70°C derate linearly with 12 mW/K above +70°C derate linearly with 8 mW/K above +60°C derate linearly with 5.5 mW/K

750 500 400

mA

mW

NOTES:

1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability .

2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

1998 Apr 30

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