Texas Instruments SNJ54ABT2244FK, SNJ54ABT2244J, SNJ54ABT2244W Datasheet

SN54ABT2244, SN74ABT2244

OCTAL BUFFERS AND LINE/MOS DRIVERS

WITH 3-STATE OUTPUTS

SCBS106B – JANUARY 1991 – REVISED JUL Y 1994

Copyright  1994, Texas Instruments Incorporated

6–1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

• Output Ports Have Equivalent 25-Ω Series

Resistors, So No External Resistors Are
Required

• State-of-the-Art

EPIC-ΙΙB

 BiCMOS Design

Significantly Reduces Power Dissipation

• T ypical V

OLP

(Output Ground Bounce)

< 1 V at VCC = 5 V, TA = 25°C

• Package Options Include Plastic

Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK), and
Plastic (N) and Ceramic (J) 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 ′ABT2240
and ′ABT2241, these devices provide the choice
of selected combinations of inverting and
noninverting outputs, symmetrical active-low
output-enable (OE

) inputs, and complementary

OE and OE

inputs. These devices feature high

fan-out and improved fan-in.
The outputs, which are designed to sink up to

12 mA, include 25-Ω series resistors to reduce
overshoot and undershoot.

T o ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74ABT2244 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.

The SN54ABT2244 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74ABT2244 is characterized for operation from –40°C to 85°C.

FUNCTION TABLE

(each buffer)

INPUTS

OUTPUT

OE

A

Y

L H H
L LL
H X Z

1
2
3
4
5
6
7
8
9
10

20
19
18
17
16
15
14
13
12
11

1OE

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

GND

V

CC

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

SN54ABT2244 ...J PACKAGE

SN74ABT2244 . . . DB, DW, N, OR PW PACKAGE

(TOP VIEW)

3212019

910111213

4
5
6
7
8

18
17
16
15
14

1Y1
2A4
1Y2
2A3
1Y3

1A2
2Y3
1A3
2Y2
1A4

SN54ABT2244 . . . FK PACKAGE

(TOP VIEW)

2Y4

1A1

1OE

1Y4

2A2 2OE

2Y1

GND

2A1

V

CC

EPIC-ΙΙB is a trademark of Texas Instruments Incorporated.

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.

SN54ABT2244, SN74ABT2244
OCTAL BUFFERS AND LINE/MOS DRIVERS
WITH 3-STATE OUTPUTS

SCBS106B – JANUARY 1991 – REVISED JULY 1994

6–2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic symbol

†

logic diagram (positive logic)

1OE

2

1A1

4

1A2

6

1A3

8

1A4

EN

1

1Y1

18

1Y2

16

1Y3

14

1Y4

12

2OE

11

2A1

13

2A2

15

2A3

17

2A4

EN

19

2Y1

9

2Y2

7

2Y3

5

2Y4

3

1

2

4

6

8

19

11

13

15

17

3

5

7

9

12

14

16

18

1A1

1A2

1A3

1A4

1Y1

2A1

2A2

2A3

2A4

2Y1

1Y2

1Y3

1Y4

2Y2

2Y3

2Y4

1OE

2OE

†

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

schematic of Y outputs

Output

V

CC

GND

1

1

SN54ABT2244, SN74ABT2244

OCTAL BUFFERS AND LINE/MOS DRIVERS

WITH 3-STATE OUTPUTS

SCBS106B – JANUARY 1991 – REVISED JUL Y 1994

6–3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

†

Supply voltage range, VCC –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, V

I

(except I/O ports) (see Note 1) –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

Current into any output in the low state, I

O

30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input clamp current, I

IK

(V

I

< 0) –18 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output clamp current, I

OK

(V

O

< 0) –50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maximum power dissipation at TA = 55°C (in still air) (see Note 2):DB package 0.6 W. . . . . . . . . . . . . . . . . . . .

DW package 1.6 W. . . . . . . . . . . . . . . . . . .

N package 1.3 W. . . . . . . . . . . . . . . . . . . . .

PW package 0.7 W. . . . . . . . . . . . . . . . . . .

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.

NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

2. The maximum package power dissipation is calculated using a junction temperature of 150°C and a board trace length of 750 mils,
except for the N package, which has a trace length of zero. For more information, refer to the

Package Thermal Considerations

application note in the 1994

ABT Advanced BiCMOS T echnology Data Book

, literature number SCBD002B.

recommended operating conditions (see Note 3)

SN54ABT2244 SN74ABT2244

MIN MAX MIN MAX

UNIT

V

CC

Supply voltage 4.5 5.5 4.5 5.5 V

V

IH

High-level input voltage 2 2 V

V

IL

Low-level input voltage 0.8 0.8 V

V

I

Input voltage 0 V

CC

0 V

CC

V

I

OH

High-level output current –24 –32 mA

I

OL

Low-level output current 12 12 mA

∆t/∆v Input transition rise or fall rate Outputs enabled 5 5 ns/V
∆t/∆V

CC

Power-up ramp rate 200 200 µs/V

T

A

Operating free-air temperature –55 125 –40 85 °C

NOTE 3: Unused or floating inputs must be held high or low.