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DM74ALS258N Datasheet

  • DM74ALS258N

  • 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer

  • 7頁

  • FAIRCHILD

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DM74ALS257 鈥?DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer
April 1984
Revised February 2000
DM74ALS257 鈥?DM74ALS258
3-STATE Quad 1-of-2-Line Data Selector/Multiplexer
General Description
These data selectors/multiplexers contain inverters and
drivers to supply full on-chip data selection to the four 3-
STATE outputs that can interface directly with data lines of
bus-organized systems. A 4-bit word selected from one of
two sources is routed to the four outputs. The
DM74ALS257 presents true data whereas the
DM74ALS258 presents inverted data to minimize propaga-
tion delay time.
This 3-STATE output feature means that n-bit (paralleled)
data selectors with up to 258 sources can be implemented
for data buses. It also permits the use of standard TTL reg-
isters for data retention throughout the system.
Features
s
Switching specifications at 50 pF
s
Switching specifications guaranteed over full tempera-
ture and V
CC
range
s
Advanced oxide-isolated, ion-implanted Schottky TTL
process
s
Functionally and pin for pin compatible with Schottky
and low power Schottky TTL counterpart
s
Improved AC performance over Schottky and low power
Schottky counterparts
s
3-STATE buffer-type outputs drive bus lines directly
s
Expand any data input point
s
Multiplex dual data buses
s
General four functions of two variables (one variable is
common)
s
Source programmable counters
Ordering Code:
Order Number
DM74ALS257M
DM74ALS257SJ
DM74ALS257N
DM74ALS258M
DM74ALS258N
Package Number
M16A
M16D
N16E
M16A
N16E
Package Description
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Function Table
Inputs
Output
Control
H
L
L
L
L
Select
X
L
L
H
H
A
X
L
H
X
X
B
X
X
X
L
H
Output Y
DM74ALS257 DM74ALS258
Z
L
H
L
H
Z
H
L
H
L
H
=
HIGH Level
L
=
LOW Level
X
=
Don't Care
Z
=
High Impedance (OFF)
漏 2000 Fairchild Semiconductor Corporation
DS006227
www.fairchildsemi.com

DM74ALS258N 產(chǎn)品屬性

  • 25

  • 集成電路 (IC)

  • 邏輯 - 信號開關(guān)，多路復(fù)用器，解碼器

  • 74ALS

  • 數(shù)據(jù)選擇器/多路復(fù)用器

  • 4 x 2:1

  • 1

  • 2.6mA，24mA

  • 單電源

  • 4.5 V ~ 5.5 V

  • 0°C ~ 70°C

  • 通孔

  • 16-DIP（0.300"，7.62mm）

  • 16-DIP

  • 管件

  • 74ALS258

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