TEXAS INSTRUMENTS SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A Technical data

SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

• 3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

• pnp Inputs Reduce dc Loading

• Package Options Include Plastic

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

description

These octal buffers and line drivers are designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. With the ′ALS240A, ′ALS241C, ′AS240A, and ′AS241A, these devices provide the choice of selected combinations of inverting outputs, symmetrical active-low output-enable (OE

) inputs, and complementary OE and OE

inputs. The -1 version of SN74ALS244C is identical to the

standard version, except that the recommended maximum I no -1 version of the SN54ALS244C.

The SN54ALS244C and SN54AS244A are characterized for operation over the full military temperature range of –55°C to 125°C. The SN74ALS244C and SN74AS244A are characterized for operation from 0°C to 70°C.

for the -1 version is 48 mA. There is

OL

SN54ALS244C, SN54AS244A ...J PACKAGE

SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE

SN54ALS244C, SN54AS244A . . . 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 9

2Y1

GND

10

(TOP VIEW)

2Y4

3 2 1 20 19

4 5 6 7 8

910111213

2Y1

1A1

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

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  1995, Texas Instruments Incorporated

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1

SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

1

2 4 6 8

19

11 13 15 17

†

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)

1

1OE

2

1Y1 1Y2 1Y3 1Y4

9

2Y1

7

2Y2

5

2Y3

3

2Y4

1A1

1A2

1A3

1A4

2OE

2A1

2A2

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, V Input voltage, V

Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

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.

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

: SN54ALS244C –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . .

A

SN74ALS244C 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

‡

2

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SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

UNIT

VILLow-level input voltage

V

IOLLow-level output current

mA

PARAMETER

TEST CONDITIONS

UNIT

V

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

recommended operating conditions

SN54ALS244C SN74ALS244C

MIN NOM MAX MIN NOM MAX

V

CC

V

IH

I

OH

T

A

†

Applies over temperature range –55°C to 70°C

‡

Applies over temperature range 70°C to 125°C

§

Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V

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

¶

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

#

The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

Supply voltage 4.5 5 5.5 4.5 5 5.5 V High-level input voltage 2 2 V

†

p

High-level output current –12 –15 mA

p

Operating free-air temperature –55 125 0 70 °C

SN54ALS244C SN74ALS244C

MIN TYP¶MAX MIN TYP¶MAX

V

IK

OH

V

OL

I

OZH

I

OZL

I

IH

I

IL

I

O

I

CC

#

VCC = 4.5 V, II = –18 mA –1.5 –1.5 V

= 4.5 V to 5.5

CC

= 4.5

CC

VCC = 4.5 V

VCC = 5.5 V, VO = 2.7 V 20 20 µA VCC = 5.5 V, VO = 0.4 V –20 –20 µA 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 = 0.4 V –0.1 –0.1 mA VCC = 5.5 V, VO = 2.25 V –20 –112 –30 –112 mA

VCC = 5.5 V

IOH = –0.4 mA VCC –2 VCC –2 IOH = –3 mA 2.4 3.2 2.4 3.2 IOH = –12 mA 2 IOH = –15 mA 2 IOL = 12 mA 0.25 0.4 0.25 0.4 IOL = 24 mA 0.35 0.5 IOL = 48 mA (-1 version) 0.35 0.5

Outputs high 9 18 9 17 Outputs low 15 25 15 24 Outputs disabled 17 29 17 27

0.8 ‡

0.7

12 24

48

0.8

§

V

mA

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3

SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

A

Y

ns

OE

Y

ns

OE

Y

ns

UNIT

OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

switching characteristics (see Figure 1)

VCC = 4.5 V to 5.5 V, CL = 50 pF,

PARAMETER

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

†

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

PLZ

FROM

(INPUT)

TO

(OUTPUT)

R1 = 500 Ω R2 = 500 Ω, TA = MIN to MAX

SN54ALS244C SN74ALS244C

MIN MAX MIN MAX

1 16 2 10 3 12 3 10 1 26 3 20 1 24 3 20 2 10 2 10 1 26 1 13

,

†

UNIT

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

Supply voltage, V Input voltage, V

Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, T

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.

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I

: SN54AS244A –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A

SN74AS244A 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

recommended operating conditions

SN54AS244A SN74AS244A

MIN NOM MAX MIN NOM MAX

V V V I I T

CC IH

IL 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 High-level output current –12 –15 mA Low-level output current 48 64 mA Operating free-air temperature –55 125 0 70 °C

‡

4

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SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

PARAMETER

TEST CONDITIONS

UNIT

V

VOLV

V

I

V

5.5 V

V

0.4 V

mA

A

Y

ns

OE

Y

ns

OE

Y

ns

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

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

SN54AS244A SN74AS244A

MIN TYP†MAX MIN TYP†MAX

V

IK

OH

I

OZH

I

OZL

I

IH

IL

I

O

I

CC

†

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

‡

The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.

OE A

‡

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V VCC = 4.5 V to 5.5 V, IOH = –2 mA VCC –2 VCC –2

IOH = –3 mA 2.4 3.4 2.4 3.4

VCC = 4.5 V

= 4.5

CC

VCC = 5.5 V, VO = 2.7 V 50 50 µA VCC = 5.5 V, VO = 0.4 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

,

=

CC

VCC = 5.5 V, VO = 2.25 V –50 –150 –50 –150 mA

VCC = 5.5 V

IOH = –12 mA 2.4 IOH = –15 mA 2.4 IOL = 48 mA 0.55 IOL = 64 mA 0.55

=

I

Outputs high 22 34 22 34 Outputs low 60 90 60 90 Outputs disabled 34 54 34 54

–0.5 –0.5

–1 –1

mA

switching characteristics (see Figure 1)

VCC = 4.5 V to 5.5 V, CL = 50 pF,

PARAMETER

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

§

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

PLZ

FROM

(INPUT)

TO

(OUTPUT)

R1 = 500 Ω R2 = 500 Ω, TA = MIN to MAX

SN54AS244A SN74AS244A

MIN MAX MIN MAX

2 9 2 6.2 1 7 1 6.2 1 10 1 9 2 8 2 7.5 1 6.5 1 6 1 10.5 1 9

,

§

UNIT

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5

SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

PARAMETER MEASUREMENT INFORMATION

SERIES 54ALS/74ALS AND 54AS/74AS DEVICES

V

CC

R

L

From Output

Under Test

(see Note A)

C

L

Test Point

R

L

From Output

Under Test

C

(see Note A)

Test Point

L

From Output

Under Test

(see Note A)

7 V

RL = R1 = R2

S1

R1

C

L

Test Point

R2

LOAD CIRCUIT FOR

BI-STATE

TOTEM-POLE OUTPUTS

Timing

Input

t

su

Data

Input

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

Output

Control

(low-level

enabling)

Waveform 1

S1 Closed

(see Note B)

Waveform 2

S1 Open

(see Note B)

t

PZL

t

PZH

ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS

VOLTAGE WAVEFORMS

1.3 V

t

PHZ

1.3 V

t

1.3 V1.3 V

FOR OPEN-COLLECTOR OUTPUTS

h

t

PLZ

LOAD CIRCUIT

3.5 V

0.3 V

3.5 V

0.3 V

3.5 V

0.3 V

[

3.5 V

V

OL

0.3 V

V

OH

0.3 V

[

0 V

High-Level

Low-Level

Out-of-Phase

(see Note C)

Pulse

Input

In-Phase

Output

LOAD CIRCUIT

FOR 3-STATE OUTPUTS

1.3 V 1.3 V

t

w

1.3 V 1.3 V

VOLTAGE WAVEFORMS

PULSE DURATIONS

1.3 V 1.3 V

t

PLH

t

PHL

1.3 V 1.3 V

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

1.3 V1.3 V

t

PHL

t

PLH

3.5 V

0.3 V

3.5 V

0.3 V

3.5 V

0.3 V

V

OH

OL

OH

OL

NOTES: A. CL includes probe and jig capacitance.

B. W aveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. When measuring propagation delay items of 3-state outputs, switch S1 is open. D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%. E. The outputs are measured one at a time with one transition per measurement.

Figure 1. Load Circuits and Voltage Waveforms

6

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