DM74ALS520WMX View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
View to exact match
DM74ALS520WMX Datasheet PDF : 5 Pages
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September 1986
Revised April 2000
DM74ALS520 • DM74ALS521
8-Bit Comparator
General Description
These comparators perform an “equal to” comparison of
two 8-bit words with provision for expansion or external
enabling. The matching of the two 8-bit input plus a logic
LOW on the EN input produces the output A = B on the
DM74ALS520 and DM74ALS521. The DM74ALS520 and
DM74ALS521 have totem pole outputs for wire AND cas-
cading. Additionally, the DM74ALS520 is provided with B
input pull up termination resistors for analog or switch data.
Features
s Switching specifications at 50 pF
s Switching specifications guaranteed over full tempera-
ture and VCC range
s Advanced oxide-isolated, ion-implanted Schottky TTL
process
s Functionally and pin for pin compatible with LS family
counterpart
s Improved output transient handling capability
Ordering Code:
Ordering Code Package Number
Package Description
DM74ALS520WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS520N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74ALS521WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
SM74ALS521N
N20A
20-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 “X” to the ordering code.
Connection Diagram
Function Table
Inputs
EN
L
L
H
H = HIGH Logic Level
L = LOW Logic Level
X = Don't Care
Data
A=B
A≠B
X
Output
A=B
L
H
H
© 2000 Fairchild Semiconductor Corporation DS006114
www.fairchildsemi.com
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