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SN74ALS677A датащи(PDF) 1 Page - Texas Instruments

номер детали SN74ALS677A
подробное описание детали  16-BIT ADDRESS COMPARATOR
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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SN74ALS677A датащи(HTML) 1 Page - Texas Instruments

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SN74ALS677A
16BIT ADDRESS COMPARATOR
SDAS012C − JUNE 1982 − REVISED JANUARY 1995
Copyright
1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
16-Bit Address Comparator With Enable
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic (NT) 300-mil DIPs
description
This
16-bit
address
comparator
simplifies
addressing of memory boards and/or other
peripheral devices. The four P inputs are normally
hardwired with a preprogrammed address. An
internal
decoder
determines
what
input
information applied to the A inputs must be low or
high to cause a low state at the Y output. For
example, a positive-logic bit combination of 0111
(decimal 7) at the P input determines that inputs
A1 through A7 must be low and that inputs A8
through A16 must be high to cause the output to
go low. Equality of the address applied at the
A inputs to the preprogrammed address is
indicated by the output being low.
This device features an enable (G) input. When G is low, the device is enabled. When G is high, the device is
disabled and the output is high, regardless of the A and P inputs.
The SN74ALS677A is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUT
G
P3
P2
P1
P0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
OUTPUT
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
LL
H
L
H
HHHH
HHH
HHHHHHH
L
L
L
LHL
L
L
HHHH
HHH
HHHHHHH
L
L
L
LH
HL
L
L
H
H
H
H
H
H
HHHHHHH
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
HL
H
L
L
L
L
L
H
H
H
H
HHHHHHH
L
L
L
HH
L
L
L
LLLL
H
H
H
HHHHHHH
L
L
L
HH
H
L
L
LLLL
L
H
H
HHHHHHH
L
L
H
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
H
LL
H
L
L
LLLL
LLL
HHHHHHH
L
L
H
LHL
L
L
LLLL
LLL
L
HHHHHH
L
L
H
LH
HL
L
LLLL
LLL
L
L
H
H
H
H
H
L
L
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
L
L
H
HL
H
L
L
LLLL
LLL
LLLL
H
H
H
L
L
H
HH
L
L
L
LLLL
LLL
LLLLL
H
H
L
L
H
HH
H
L
L
LLLL
LLL
LLLLLL
H
L
L
All other combinations
H
H
Any combination
H
DW OR NT PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
GND
VCC
G
Y
P3
P2
P1
P0
A16
A15
A14
A13
A12
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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