Datasheet 74f2244 DATASHEETS (Philips)

INTEGRATED CIRCUITS

74F2244

Octal buffer with 30Ω equivalent output termination (3-State)

Product specification 1994 Dec 5 IC15 Data Handbook

Philips Semiconductors

Philips Semiconductors Product specification

Octal buffer with 30Ω equivalent output termination (3-State)

FEA TURES

•Octal bus interface

•30Ω output termination ideal for driving DRAM

•15mA source current

•SSOP Type II Package

ORDERING INFORMATION

ORDER CODE

DESCRIPTION COMMERCIAL RANGE

= 5V ±10%, T

V

CC

20-pin plastic DIP N74F2244N SOT146-1

20-pin plastic SOL N74F2244D SOT163-1

20-pin plastic SSOP Type II N74F2244DB SOT339-1

DESCRIPTION

The 74F2244 is an octal buffer that is ideal for driving dynamic DRAM with matching impedance. The outputs are all capable of sinking 5mA and sourcing up to 15mA. The device features two output enables, OE outputs.

TYPE

74F2244 4.0ns 30mA

= 0°C to +70°C

amb

a and OEb, each controlling four of the 3–state

TYPICAL

PROPAGATION

DELA Y

DRAWING NUMBER

74F2244

TYPICAL

SUPPLY CURRENT

(TOTAL)

INPUT AND OUTPUT LOADING AND FAN OUT TABLE

PINS DESCRIPTION

Ian, Ibn Data inputs 1.0/0.33 20µA/0.2mA

OEa, OEb Output enable inputs (active low) 1.0/0.33

Yan, Ybn Data outputs 750/8.33 15mA/5mA

NOTE: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state.

PIN CONFIGURATION

1

OEa

2

Ia0

3

Yb0

4

Ia1

5

Yb1

6

Ia2

7

Yb2

8

Ia3

9

Yb3

10 11

GND

20

V

19

OEb

18

Ya0

17

Ib0

16

Ya1

15

Ib1

14

Ya2

13

Ib2

12

Ya3 Ib3

SF00227

CC

LOGIC SYMBOL

1

OEa OEb19

V

= Pin 20

CC

GND = Pin 10

74F (U.L.)

HIGH/LOW

LOAD VALUE

HIGH/LOW

20µA/0.2mA

2 4 6 8 17 15 13 11

Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3

Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3

18 16 14 12 3 5 7 9

SF00228

1994 Dec 05 853-1525 14380

2

Philips Semiconductors Product specification

SYMBOL

PARAMETER

Octal buffer with 30Ω equivalent output termination (3-State)

IEC/IEEE SYMBOL

1

19

2 4 6 8

17 15 13

11

EN1 EN2

2D

1

2

18 16

14 12 3 5 7 9

SF00229

FUNCTION TABLE

INPUTS OUTPUTS

OEa Ia OEb Ib Ya Yb

L L L L L L L H L H H H

H X H X Z Z

Notes to function table

H = High voltage level L = Low voltage level X = Don’t care Z = High impedance ”off” state

LOGIC DIAGRAM

Ia0

Ia1

Ia2

Ia3

OEa

V

= Pin 20

CC

GND = Pin 10

74F2244

2

4

6

8

1

18

Ya0

16

Ya1

14

Ya2

12

Ya3

Ib0

Ib1

Ib2

Ib3

OEb

17

15

13

11

10

2

Yb0

5

Yb1

7

Yb2

9

Yb3

SF00236

ABSOLUTE MAXIMUM RATINGS

(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free air temperature range.)

SYMBOL

V

CC

V

IN

I

IN

V

OUT

I

OUT

T

amb

T

stg

Supply voltage –0.5 to +7.0 V Input voltage –0.5 to +7.0 V Input current –30 to +5 mA

Voltage applied to output in high output state –0.5 to V Current applied to output in low output state Operating free air temperature range 0 to +70

Storage temperature range –65 to +150

PARAMETER RATING UNIT

CC

10 mA

RECOMMENDED OPERATING CONDITIONS

LIMITS UNIT

MIN NOM MAX

5 mA

V V V I I I T

Ik OH OL

amb

CC IH IL

PARAMETER

Supply voltage 4.5 5.0 5.5 V High–level input voltage 2.0 V Low–level input voltage 0.8 V Input clamp current –18 mA High–level output current –15 mA Low–level output current Operating free air temperature range 0 +70

V

°C °C

°C

1994 Dec 05

3

Philips Semiconductors Product specification

SYMBOL

PARAMETER

UNIT

3

Octal buffer with 30Ω equivalent output termination (3-State)

DC ELECTRICAL CHARACTERISTICS

(Over recommended operating free-air temperature range unless otherwise noted.)

TEST LIMITS

CONDITIONS

VCC = MIN, IOH = –3mA

V

OH

High-level output voltage

VIL = MAX, VIH = MIN IOH =

–15mA

V

OL

Low-level output voltage

VCC = MIN, VIL = MAX,

IOL = MAX

VIH = MIN, ±5%V V I

I

IH

I

IL

I

OZH

I

OZL

I

OS

I

CC

IK

Input clamp voltage VCC = MIN, II = I

IK

Input current at maximum input voltage VCC = MAX, VI = 7.0V 100 µA High–level input current VCC = MAX, VI = 2.7V 20 µA Low–level input current VCC = MAX, VI = 0.5V –0.2 mA Off–state output current,

high–level voltage applied Off–state output current,

low–level voltage applied Short–circuit output current

Supply current (total) I

VCC = MAX, V

VCC = MAX, VO = 0.5V –50

VCC = MAX -60 -150 mA

I

CCH CCLVCC

I

CCZ

= MAX 45 65 mA

= 2.7V 50

O

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.

2. All typical values are at V

3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold

= 5V, T

CC

amb

= 25°C.

techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, I

tests should be performed last.

OS

1

±10%V

C

±5%V ±10%V

C

±5%V ±10%V

C

MIN TYP2MAX

2.5 V

C

2.7 3.4 V

CC

2.0 V

C

2.0 V

CC

C

CC

74F2244

0.50 V

0.42 0.50 V

–0.73 -1.2 V

µA

20 30 mA

26 40 mA

AC ELECTRICAL CHARACTERISTICS

T

= +25°C T

amb

SYMBOL PARAMETER TEST VCC = +5.0V

CONDITION CL = 50pF, RL = 500Ω CL = 50pF, RL = 500Ω

MIN TYP MAX MIN MAX

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

1994 Dec 05

Propagation delay Ian, Ibn to Yn

Output enable time to high or low level

Output disable time from high or low level

Waveform 1 Waveform 2

Waveform 3 Waveform 2

Waveform 3

4

3.0

2.5

3.0

1.5

4.5

5.0

3.5

2.5

LIMITS

7.0

7.5

8.0

6.0

5.5

= 0°C to +70°C

amb

VCC = +5.0V ± 10%

2.5

2.0

3.0

1.0

8.0

7.5

8.0

8.5

6.0

5.5

UNIT

ns

Philips Semiconductors Product specification

Octal buffer with 30Ω equivalent output termination (3-State)

AC WAVEFORMS

For all waveforms, VM = 1.5V.

Ian, Ibn

Yn

V

M

t

PLH

V

M

t

PHL

V

M

Waveform 1. Propagation delay for data to outputs

OEn

V

M

t

PZH

Yn

V

M

t

PHZ

V

M

V

M

SF00231

VOH–0.3V

0V

OEn

Yn

Waveform 3. 3-State output enable time to low level

74F2244

V

M

t

PZL

and output disable time from low level

V

M

t

PLZ

V

M

3.5V

VOL+0.3V

SF00234

Waveform 2. 3-State output enable time to high level

and output disable time from high level

TEST CIRCUIT AND WAVEFORMS

SWITCH POSITION

TEST SWITCH

, t

t

PLZ

PZL

closed

openAll other

V

PULSE

GENERATOR

IN

Test circuit for 3-State outputs

DEFINITIONS:

= Load resistor; see AC electrical characteristics for

R

L

value.

C

= Load capacitance includes jig and probe

L

capacitance; see AC electrical characteristics for value

R

= T ermination resistance should be equal to Z

T

pulse generators.

V

CC

V

D.U.T.

R

T

OUT

C

L

SF00233

t

7.0V NEGATIVE

PULSE

R

L

R

L

POSITIVE PULSE

90%

10%

V

M

10%

t

THL (tf

t

TLH (tr

90%

V

M

w

V

M

10%

)

t

)

TLH (tr

t

)

THL (tf

90%

V

M

t

w

90%

10%

AMP (V)

0V

AMP (V)

0V

Input pulse definition

INPUT PULSE REQUIREMENTS

V

1.5V

rep. rate

M

1MHz 500ns 2.5ns

amplitude

3.0V

t

w

t

TLHtTHL

2.5ns

SF000235

OUT

of

family

74F

1994 Dec 05

5

Philips Semiconductors Product specification

74F2244Octal buffer with 30Ω equivalent output termination (3-State)

DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1

1994 Dec 05

6

Philips Semiconductors Product specification

74F2244Octal buffer with 30Ω equivalent output termination (3-State)

SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1

1994 Dec 05

7

Philips Semiconductors Product specification

74F2244Octal buffer with 30Ω equivalent output termination (3-State)

SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1

1994 Dec 05

8

Philips Semiconductors Product specification

74F2244Octal buffer with 30Ω equivalent output termination (3-State)

NOTES

1994 Dec 05

9

Philips Semiconductors Product specification

74F2244Octal buffer with 30Ω equivalent output termination (3-State)

DEFINITIONS

Data Sheet Identification Product Status Definition

Objective Specification

Preliminary Specification

Product Specification

Formative or in Design

Preproduction Product

Full Production

Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.

LIFE SUPPORT APPLICA TIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected

to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.

Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381

This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.

This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product.

Philips Semiconductors and Philips Electronics North America Corporation

register eligible circuits under the Semiconductor Chip Protection Act.

 Copyright Philips Electronics North America Corporation 1994

(print code) Date of release: July 1994 Document order number: 9397-750-05198