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SN74AS756N

Part # SN74AS756N
Description Buffer/Line Driver 8-CH Inverting 3-ST/Open Collector Bipo
Category IC
Availability In Stock
Qty 35
Qty Price
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8 - 14 $3.38158
15 - 22 $2.78980
23 - 29 $2.59254
30 + $2.31074
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Texas Instruments
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

SN54AS756, SN74AS756, SN74AS757
OCTAL BUFFERS AND LINE DRIVERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS040B – DECEMBER 1983 – REVISED JANUARY 1995
Copyright 1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• Open-Collector Outputs Drive Bus Lines or
Buffer Memory Address Registers
• Eliminate the Need for 3-State Overlap
Protection
• pnp Inputs Reduce dc Loading
• Open-Collector Versions of ′AS240A and
′AS241
• 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 by eliminating the need for 3-state
overlap protection. The designer has a 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 SN54AS756 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74AS756 and SN74AS757 are
characterized for operation from 0°C to 70°C.
logic symbols
‡
2
1A1
4
1A2
6
1A3
8
1A4
EN
1
1Y1
18
1Y2
16
1Y3
14
1Y4
12
11
2A1
13
2A2
15
2A3
17
2A4
EN
19
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1OE
2OE
′AS756
2
1A1
4
1A2
6
1A3
8
1A4
EN
1
1Y1
18
1Y2
16
1Y3
14
1Y4
12
11
2A1
13
2A2
15
2A3
17
2A4
EN
19
2OE
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1OE
SN74AS757
‡
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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/2OE
†
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
SN54AS756 ...J PACKAGE
SN74AS756, SN74AS757 . . . DW OR N PACKAGE
(TOP VIEW)
3 2 1 20 19
910111213
4
5
6
7
8
18
17
16
15
14
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
SN54AS756 . . . FK PACKAGE
(TOP VIEW)
2Y4
1A1
1OE
1Y4
2A2 2OE
2Y1
GND
2A1
V
CC
†
2OE for ′AS756 or 2OE for SN74AS757
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.
SN54AS756, SN74AS756, SN74AS757
OCTAL BUFFERS AND LINE DRIVERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS040B – DECEMBER 1983 – REVISED JANUARY 1995
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagrams (positive logic)
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
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
′AS756 SN74AS757
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off-state output voltage 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN54AS756 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74AS756, SN74AS757 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.
SN54AS756, SN74AS756, SN74AS757
OCTAL BUFFERS AND LINE DRIVERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS040B – DECEMBER 1983 – REVISED JANUARY 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions
SN54AS756
SN74AS756
SN74AS757
UNIT
MIN NOM MAX MIN NOM MAX
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.7 0.8 V
V
OH
High-level output voltage 5.5 5.5 V
I
OL
Low-level output current 48 64 mA
T
A
Operating free-air temperature –55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS
SN54AS756
SN74AS756
SN74AS757
UNIT
MIN TYP
†
MAX MIN TYP
†
MAX
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 V
I
OH
V
CC
= 4.5 V, V
OH
= 5.5 V 0.1 0.1 mA
V
OL
V
CC
=45V
I
OL
= 48 mA 0.55
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 64 mA 0.55
V
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 0.1 mA
I
IH
V
CC
= 5.5 V, V
I
= 2.7 V 20 20 µA
I
IL
A inputs of
SN74AS757 only
V
CC
= 5.5 V, V
I
= 0.4 V
–1 –1
mA
IL
All other inputs
CC
,
I
–0.5 –0.5
′
AS756
V
CC
=55V
Outputs high 9 15 9 15
I
CC
′AS756
V
CC
=
5
.
5
V
Outputs low 51 80 51 80
mA
I
CC
SN74AS757
V
CC
=55V
Outputs high 21 33 21 33
mA
SN74AS757
V
CC
=
5
.
5
V
Outputs low 61 95 61 95
†
All typical values are at V
CC
= 5 V, T
A
= 25°C.
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