Philips 74lv244 DATASHEETS

INTEGRATED CIRCUITS

74LV244

Octal buffer/line driver (3-State)

Product specification Supersedes data of 1997 Feb 19 IC24 Data Handbook

 

1998 May 20

Philips Semiconductors Product specification

74L V244Octal buffer/line driver (3-State)

FEA TURES

•Wide operating voltage: 1.0 to 5.5 V

•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

= 3.3 V,

•Output capability: bus driver

•I

category: MSI

CC

QUICK REFERENCE DATA

GND = 0 V; T

= 25°C; tr = t

amb

SYMBOL

Propagation delay

t

PHL/tPLH

C

I

C

PD

1An to 1Yn; 2An to 2Y

Input capacitance 3.5 pF Power dissipation capacitance per buffer

NOTE:

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

 V

 (C

L

2

 fi  (CL  V

CC

2

 fo) = sum of the outputs.

CC

≤ 2.5 ns

f

PARAMETER CONDITIONS TYPICAL UNIT

n

2

 fo) where:

CC

= 3.6 V

CL = 15 pF; VCC = 3.3 V

VCC = 3.3 V VI = GND to V

DESCRIPTION

The 74LV244 is a low-voltage Si-gate CMOS device and is pin and function compatible with 74HC/HCT244.

The 74LV244 is an octal non-inverting buf fer/line driver with 3-State outputs. The 3-State outputs are controlled by the output enable inputs 1OE assume a high impedance OFF-state. The 74LV244 is identical to the 74LV240 but has non-inverting outputs.

CC

and 2OE. A HIGH on nOE causes the outputs to

8.0 ns

1

35 pF

ORDERING INFORMATION

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

20-Pin Plastic DIL –40°C to +125°C 74LV244 N 74LV244 N SOT146-1 20-Pin Plastic SO –40°C to +125°C 74LV244 D 74LV244 D SOT163-1 20-Pin Plastic SSOP Type II –40°C to +125°C 74LV244 DB 74LV244 DB SOT339-1 20-Pin Plastic TSSOP Type I –40°C to +125°C 74LV244 PW 74LV244PW DH SOT360-1

PIN CONFIGURATION

1

1OE

1A

2

0

3

2Y

0

4

1A

1

5

2Y

1

6

1A

2

7

2Y

2

8

1A

3

9

2Y

3

10

GND

20

V

19

2OE

18

1Y 2A

17 16

1Y

15

2A

14

1Y

13

2A 1Y

12

2A

11

SV00620

CC

0

1

2

3

LOGIC SYMBOL

1Y

2

1A

0

17

2A

0

1A

4

1

15

2A

1

1A

6

2

13

2A

2

1A

8

3

11

2A

3

1OE1 2OE19

0

2Y

0

1Y

1

2Y

1

1Y

2

2Y

2

1Y

3

2Y

3

SV00621

18

3

16

5

14

7

12

9

1998 May 20 853–1924 19420

2

Philips Semiconductors Product specification

74LV244Octal buffer/line driver (3-State)

PIN DESCRIPTION

NUMBER

1 1OE Output enable input (active LOW) 2, 4, 6, 8 1A0 to 1A3Data inputs 3, 5, 7, 9 2Y0 to 2Y3Bus outputs 10 GND Ground (0 V) 17, 15, 13, 11 2A0 to 2A3Data inputs 18, 16, 14, 12 1Y0 to 1Y3Bus outputs 19 2OE Output enable input (active LOW) 20 V

SYMBOL FUNCTION

CC

Positive supply voltage

LOGIC SYMBOL (IEEE/IEC)

1

EN

2

4 6 8

19

EN

11

13 15 17

18

16 14 12

9

7 5 3

SV00666

FUNCTIONAL DIAGRAM

2

1A

0

4

1A

1

6

1A

2

1A

8

3

1

1OE

17

2A

0

2A

15

1

13

2A

2

11

2A

3

2OE19

FUNCTION TABLE

INPUTS OUTPUT

nOE nA

L L L L H H

H X Z

NOTES:

H = HIGH voltage level L = LOW voltage level X = don’t care Z = high impedance OFF-state

n

1Y018

1Y

1

1Y

2

1Y

3

2Y03

2Y

1

2Y

2

2Y

3

SV00622

16

14

12

5

7

9

nY

n

1998 May 20

3

Philips Semiconductors Product specification

74LV244Octal buffer/line driver (3-State)

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 V

CC

DC supply voltage See Note 1 1.0 3.3 5.5 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

= 5.5V.

CC

See DC and AC

characteristics

VCC = 1.0V to 2.0V VCC = 2.0V to 2.7V VCC = 2.7V to 3.6V VCC = 3.6V to 5.5V

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

–40 –40

– – – –

CC CC

+85

+125

500 200 100

50

V V

°C

ns/V

ABSOLUTE MAXIMUM RATINGS

1, 2

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

SYMBOL

V

CC

I

IK

I

OK

I

O

I

GND

I

CC

T

stg

P

TOT

DC supply voltage –0.5 to +7.0 V DC input diode current VI < –0.5 or VI > VCC + 0.5V 20 mA DC output diode current VO < –0.5 or VO > VCC + 0.5V 50 mA DC output source or sink current

– bus driver outputs

DC VCC or GND current for types with

,

– bus driver outputs

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

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

PARAMETER CONDITIONS RATING UNIT

–0.5V < VO < VCC + 0.5V 35 mA

70 mA

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

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 May 20

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