參數(shù)資料
型號(hào): SN54ALS258AFK
廠商: Texas Instruments, Inc.
英文描述: QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS
中文描述: 四2線1線數(shù)據(jù)選擇器/多路復(fù)用3態(tài)輸出
文件頁(yè)數(shù): 1/9頁(yè)
文件大?。?/td> 139K
代理商: SN54ALS258AFK
SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258
QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS124C – APRIL 1982 – REVISED AUGUST 1996
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
3-State Outputs Interface Directly With
System Bus
Provide Bus Interface From Multiple
Sources in High-Performance Systems
Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
These data selectors/multiplexers are designed
to multiplex signals from 4-bit data sources to
4-output data lines in bus-organized systems. The
3-state outputs do not load the data lines when the
output-enable (OE) input is at a high logic level.
The SN54ALS257A and SN54ALS258A are
characterized for operation over the full military
temperature range of –55
°
C to 125
°
C. The
SN74ALS257A, SN74ALS258A, SN74AS257,
and SN74AS258 are characterized for operation
from 0
°
C to 70
°
C.
FUNCTION TABLE
INPUTS
OUTPUT Y
OE
A/B
DATA
SN54ALS257A
SN74ALS257A
SN74AS257
SN54ALS258A
SN74ALS258A
SN74AS258
A
B
H
X
X
X
Z
Z
L
L
L
X
L
H
L
L
H
X
H
L
L
H
X
L
L
H
L
H
X
H
H
L
Copyright
1996, Texas Instruments Incorporated
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.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A/B
1A
1B
1Y
2A
2B
2Y
GND
V
CC
OE
4A
4B
4Y
3A
3B
3Y
SN54ALS257A, SN54ALS258A . . . J PACKAGE
SN74ALS257A, SN74ALS258A, SN74AS257,
SN74AS258 . . . D OR N PACKAGE
(TOP VIEW)
SN54ALS257A, SN54ALS258A . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
3
2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
4A
4B
NC
4Y
3A
1B
1Y
NC
2A
2B
1
A
N
3
3
O
2
G
N
V
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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