Datasheet SN54F244J, SN74F244DBLE, SN74F244DBR, SN74F244DW, SN74F244DWR Datasheet (Texas Instruments)

SN54F244, SN74F244

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SDFS063A – D2932, MARCH 1987 – REVISED OCT OBER 1993

• 3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

• Package Options Include Plastic

Small-Outline (SOIC) and Shrink
Small-Outline (SSOP) Packages, Ceramic
Chip Carriers, and Plastic and Ceramic
DIPs

description

These octal buffers and line drivers are designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters. Taken together with the ′F240 and
′F241, these devices provide the choice of
selected combinations of inverting and
noninverting outputs, symmetrical OE
output-enable) inputs, and complementary OE
and OE

The ′F244 is organized as two 4-bit buffers/line
drivers with separate output enable (OE
When OE
A inputs to the Y outputs. When OE
outputs are in the high-impedance state.

The SN74F244 is available in TI’s shrink
small-outline package (DB), which provides the
same I/O pin count and functionality of standard
small-outline packages in less than half the
printed-circuit-board area.

inputs.

is low, the device passes data from the

(active-low

) inputs.

is high, the

SN54F244 ...J PACKAGE

SN74F244 . . . DB, DW, OR N PACKAGE

1A2
2Y3
1A3
2Y2
1A4

(TOP VIEW)

1OE

1

1A1

2

2Y4

3

1A2

4

2Y3

5

1A3

6

2Y2

7

1A4

8
9

2Y1

GND

SN54F244 . . . FK PACKAGE

10

(TOP VIEW)

2Y4

1A1

3 2 1 20 19

4
5
6
7
8

9 10 11 12 13

2Y1

GND

20
19
18
17
16
15
14
13
12
11

V

1OE

2A1

CC

1Y4

V

CC

2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1

18
17
16
15
14

2A2 2OE

1Y1
2A4
1Y2
2A3
1Y3

The SN54F244 is characterized for operation over
the full military temperature range of –55°C to
125°C. The SN74F244 is characterized for
operation from 0°C to 70°C.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

FUNCTION TABLE

(each buffer)

INPUTS

OE A

L H H
L LL

HXZ

OUTPUT

Y

Copyright  1993, Texas Instruments Incorporated

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–1

SN54F244, SN74F244
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS

SDFS063A – D2932, MARCH 1987 – REVISED OCT OBER 1993

1

2
4
6
8

19

11
13
15
17

†

EN

EN

logic symbol

1OE

1A1
1A2
1A3
1A4

2OE

2A1
2A2
2A3
2A4

†

This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.

18
16
14
12

logic diagram (positive logic)

1OE

1Y1
1Y2
1Y3
1Y4

9

2Y1

7

2Y2

5

2Y3

3

2Y4

1A1

1A2

1A3

1A4

2OE

2A1

2A2

1

2

4

6

8

19

11

13

18

16

14

12

1Y1

1Y2

1Y3

1Y4

9

2Y1

7

2Y2

2A3

2A4

15

17

5

2Y3

3

2Y4

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, V
Input voltage range, V

Input current range –30 mA to 5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the disabled or power-off state –0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the high state –0.5 V to V

Current into any output in the low state: SN54F244 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54F244 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

‡

Stresses beyond those listed under “absolute maximum ratings” 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.

NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.

–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

(see Note 1) –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F244 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F244 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

‡

CC

2–2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54F244, SN74F244

UNIT

PARAMETER

TEST CONDITIONS

UNIT

V

V

VOLV

V

V

I

V

5.5 V

V

0.5 V

mA

V

Out uts oen

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SDFS063A – D2932, MARCH 1987 – REVISED OCTOBER 1993

recommended operating conditions

SN54F244 SN74F244

MIN NOM MAX MIN NOM MAX

V

CC

V

IH

V

IL

I

IK

I

OH

I

OL

T

A

electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)

V

IK

OH

I

OZH

I

OZL

I

I

I

IH

IL

I

OS

I

CC

†

All typical values are at VCC = 5 V, TA = 25°C.

‡

Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.

Supply voltage 4.5 5 5.5 4.5 5 5.5 V
High-level input voltage 2 2 V
Low-level input voltage 0.8 0.8 V
Input clamp current –18 –18 mA
High-level output current –12 –15 mA
Low-level output current 48 64 mA
Operating free-air temperature –55 125 0 70 °C

SN54F244 SN74F244

MIN TYP†MAX MIN TYP†MAX

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V

IOH = – 3 mA 2.4 3.3 2.4 3.3

VCC = 4.5 V

VCC = 4.75 V, IOH = – 3 mA 2.7

= 4.5

CC

VCC = 5.5 V, VO = 2.7 V 50 50 µA
VCC = 5.5 V, VO = 0.5 V –50 –50 µA
VCC = 5.5 V, VI = 7 V 0.1 0.1 mA

VCC = 5.5 V, VI = 2.7 V 20 20 µA
OE
Any A

‡

CC

VCC = 5.5 V, VO = 0 –100 –225 –100 –225 mA

CC

p

=

= 5.5 V,

p

,

IOH = – 12 mA 2 3.2
IOH = – 15 mA 2 3.1

IOL = 48 mA 0.38 0.55
IOL = 64 mA 0.42 0.55

=

I

Outputs high 40 60 40 60
Outputs low 60 90 60 90
Outputs disabled 60 90 60 90

–1 –1

– 1.6 – 1.6

mA

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–3

SN54F244, SN74F244

(

)

(

)

(INPUT)

(OUTPUT)

A

Y

ns

OE

Y

ns

OE

Y

ns

OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS

SDFS063A – D2932, MARCH 1987 – REVISED OCT OBER 1993

switching characteristics (see Note 2)

VCC = 5 V,
CL = 50 pF,

PARAMETER

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t
†
NOTE 2: Load circuits and waveforms are shown in Section 1.

PLZ

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

FROM
INPUT

TO

OUTPUT

RL = 500 Ω,
TA = 25°C

′F244 SN54F244 SN74F244

MIN TYP MAX MIN MAX MIN MAX

1.7 3.6 5.2 2 6.5 1.7 6.2

1.7 3.6 5.2 2 7 1.7 6.5

1.2 3.9 5.7 2 7 1.2 6.7

1.2 5 7 2 8.5 1.2 8

1.2 4.1 6 2 7 1.2 7

1.2 4.1 6 2 7.5 1.2 7

VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500Ω,
TA = MIN to MAX

†

UNIT

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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Copyright  1998, Texas Instruments Incorporated