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SN74AS757N 데이터시트(PDF) 1 Page - Texas Instruments

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부품명 SN74AS757N
상세설명  OCTAL BUFFERS AND LINE DRIVERS WITH OPEN-COLLECTOR OUTPUTS
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SN74AS757N 데이터시트(HTML) 1 Page - Texas Instruments

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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
VCC
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
910 11 12 13
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)
† 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.


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