Datasheet SN74BCT2244DW, SN74BCT2244DWR, SN74BCT2244N, SNJ54BCT2244FK, SNJ54BCT2244J Datasheet (Texas Instruments)

SN54BCT2244, SN74BCT2244

OCTAL BUFFERS AND LINE/MOS DRIVERS

WITH 3-STATE OUTPUTS

SCBS017C – SEPTEMBER 1988 – REVISED NOVEMBER 1993

• State-of-the-Art BiCMOS Design

Significantly Reduces I

CCZ

• Output Ports Have Equivalent 33-Ω Series

Resistors, So No External Resistors Are
Required

• 3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

• Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W),
andStandard Plastic and Ceramic 300-mil
DIPs (J, N)

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 ′BCT2240
and SN74BCT2241, these devices provide the
choice of selected combinations of inverting and
noninverting outputs, symmetrical active-low
output-enable (OE
OE and OE inputs. These devices feature high
fan-out and improved fan-in.

The outputs, which are designed to source or sink
up to 12 mA, include 33-Ω series resistors to
reduce overshoot and undershoot.

) inputs, and complementary

SN54BCT2244 ...J OR W PACKAGE

SN74BCT2244 . . . DW OR N PACKAGE

SN54BCT2244 . . . FK PACKAGE

1A2
2Y3
1A3
2Y2
1A4

(TOP VIEW)

1OE

1

1A1

2

2Y4

3

1A2

4

2Y3

5

1A3

6

2Y2

7

1A4

8

2Y1

9

GND

10

(TOP VIEW)

2Y4

3212019

4
5
6
7
8

910111213

2Y1

1A1

GND

20
19
18
17
16
15
14
13
12
11

1OE

V

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 SN54BCT2244 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT2244 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

L H H
L LL

H X Z

OUTPUT

A

Y

Copyright  1993, Texas Instruments Incorporated

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–1

SN54BCT2244, SN74BCT2244
OCTAL BUFFERS AND LINE/MOS DRIVERS
WITH 3-STATE OUTPUTS

SCBS017C – SEPTEMBER 1988 – REVISED NOVEMBER 1993

1

2
4
6
8

19

11
13
15
17

†

EN

1

EN

1

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)

1A1

1A2

1A3

1A4

2A1

2A2

1

2

4

6

8

19

11

13

18

16

14

12

1Y1

1Y2

1Y3

1Y4

9

2Y1

7

2Y2

1OE

1Y1
1Y2
1Y3
1Y4

9

2Y1

7

2Y2

5

2Y3

3

2Y4

2OE

schematic of Y outputs

15

2A3

17 3

2A4

V

CC

Output

5

2Y3

2Y4

2–2

GND

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54BCT2244, SN74BCT2244

UNIT

OCTAL BUFFERS AND LINE/MOS DRIVERS

WITH 3-STATE OUTPUTS

SCBS017C – SEPTEMBER 1988 – REVISED NOVEMBER 1993

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

Supply voltage range, V

CC

Input voltage range, VI (see Note 1) – 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the disabled or power-off state, V
Voltage range applied to any output in the high state, V

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

O

O

Input clamp current, IIK –30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Current into any output in the low state 24 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54BCT2244 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT2244 0°C to 70°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 and output voltage ratings may be exceeded if the input and output current ratings are observed.

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

– 0.5 V to 5.5 V. . . . . . . . . . . . . . .

– 0.5 V to V

recommended operating conditions

SN54BCT2244 SN74BCT2244

MIN NOM MAX MIN NOM MAX

V
V
V
I
I
I
T

CC
IH

IL
IK
OH
OL

A

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 –12 mA
Low-level output current 12 12 mA
Operating free-air temperature –55 125 0 70 °C

†

CC

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–3

SN54BCT2244, SN74BCT2244

PARAMETER

TEST CONDITIONS

UNIT

V

V

V

V

V

V

4.5 V

V

(INPUT)

(OUTPUT)

A

Y

ns

OE

Y

ns

OE

Y

ns

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

SCBS017C – SEPTEMBER 1988 – REVISED NOVEMBER 1993

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

SN54BCT2244 SN74BCT2244

MIN TYP†MAX MIN TYP†MAX

V

IK

OH

OL

I

I

I

IH

I

IL

I

OZH

I

OZL

‡

I

OS

I

CCH

I

CCL

I

CCZ

C

i

C

†

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

‡

Not more than one output should be tested at a time, and the duration of the test should not exceed one second.

o

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V

= 4.5

CC

=

CC

VCC = 5.5 V, VI = 7 V 0.1 0.1 mA
VCC = 5.5 V, VI = 2.7 V 20 20 µA
VCC = 5.5 V, VI = 0.5 V –1 –1 mA
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, VO = 0 –100 –225 –100 –225 mA
VCC = 5.5 V, Outputs open 23 37 23 37 mA
VCC = 5.5 V, Outputs open 53 77 53 77 mA
VCC = 5.5 V, Outputs open 6.5 10 6.5 10 mA
VCC = 5 V, VI = 2.5 V or 0.5 V 6 6 pF
VCC = 5 V, VO = 2.5 V or 0.5 V 11 11 pF

IOH = –1 mA 2.4 2.4
IOH = –12 mA 2 2
IOL = 1 mA 0.15 0.5 0.15 0.5
IOL = 12 mA 0.35 0.8 0.35 0.8

switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C

PARAMETER

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

NOTE 2: Load circuit and voltage voltage waveforms are shown in Section 1.

= 50 pF (unless otherwise noted) (see Note 2)

L

FROM

TO

VCC = 5 V,

TA = 25°C

MIN TYP MAX MIN MAX MIN MAX

0.5 3 4.4 0.5 5.2 0.5 4.9

1.6 4.6 6.3 1.6 7.1 1.6 6.7

2.4 6.1 7.7 2.4 9.1 2.4 8.7

3.9 7.6 9.4 3.9 10.8 3.9 10.4

1.7 5.2 6.9 1.7 8.1 1.7 7.8

2.8 6.5 8.3 2.8 10.9 2.8 9.8

SN54BCT2244 SN74BCT2244

UNIT

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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Copyright  1998, Texas Instruments Incorporated