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Teilenummer | DM7438 |
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Beschreibung | Quad 2-Input NAND Buffers | |
Hersteller | National Semiconductor | |
Logo | ||
Gesamt 4 Seiten June 1989
DM5438 DM7438 Quad 2-Input NAND Buffers
with Open-Collector Outputs
General Description
This device contains four independent gates each of which
performs the logic NAND function The open-collector out-
puts require external pull-up resistors for proper logical op-
eration
Pull-Up Resistor Equations
RMAX
e
VCC (Min) b VOH
N1 (IOH) a N2 (IIH)
RMIN
e
VCC (Max) b VOL
IOL b N3 (IIL)
Where N1 (IOH) e total maximum output high current for all
outputs tied to pull-up resistor
N2 (IIH) e total maximum input high current for all
inputs tied to pull-up resistor
N3 (IIL) e total maximum input low current for all
inputs tied to pull-up resistor
Connection Diagram
Dual-In-Line Package
Function Table
TL F 6513 – 1
Order Number DM5438J DM5438W DM7438M or DM7438N
See NS Package Number J14A M14A N14A or W14B
Y e AB
Inputs
Output
AB
LL
LH
HL
HH
Y
H
H
H
L
H e High Logic Level
L e Low Logic Level
C1995 National Semiconductor Corporation TL F 6513
RRD-B30M105 Printed in U S A
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Seiten | Gesamt 4 Seiten | |
PDF Download | [ DM7438 Schematic.PDF ] |
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