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DM74ALS1240AWM Arkusz danych(PDF) 1 Page - Fairchild Semiconductor

Numer części DM74ALS1240AWM
Szczegółowy opis  Octal 3-STATE Bus Driver
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Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74ALS1240AWM Arkusz danych(HTML) 1 Page - Fairchild Semiconductor

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© 2000 Fairchild Semiconductor Corporation
DS006261
www.fairchildsemi.com
September 1986
Revised February 2000
DM74ALS1240A
Octal 3-STATE Bus Driver
General Description
These octal 3-STATE bus drivers are designed to provide
the designer with flexibility in implementing a bus interface
with memory, microprocessor, or communication systems,
and
are
low
power
dissipation
versions
of
the
DM74ALS240A and DM74ALS241A. The output 3-STATE
gating control is organized into two separate groups of four
buffers. The DM74ALS1240A control inputs symmetrically
enable the respective outputs when set logic LOW. The 3-
STATE circuitry contains a feature that maintains the buffer
outputs in 3-STATE (high impedance state) during power
supply ramp-up or ramp-down. This eliminates bus glitch-
ing problems that arise during power-up and power-down.
Features
s Advanced oxide-isolated, ion-implanted Schottky TTL
process
s Switching response specified into 500
Ω and 50 pF load
s Switching response specifications guaranteed over full
temperature and VCC supply range
s PNP input design reduces input loading
s Low power dissipation version
s Low level drive current: 74ALS
= 16 mA
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
H
= HIGH Level Logic State
L
= LOW Level Logic State
X
= Don't Care (Either LOW or HIGH Level Logic State)
Z
= High Impedance (OFF) State
Logic Diagram
Order Number
Package Number
Package Description
DM74ALS1240AWM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Input
Output
G
AY
LL
H
LH
L
HX
Z


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