Quad 2-Input NAND Buffers
DM5438 DM7438 Quad 2-Input NAND Buffers with Open-Collector Outputs
June 1989
DM5438 DM7438 Quad 2-Input NAND Buffers ...
Description
DM5438 DM7438 Quad 2-Input NAND Buffers with Open-Collector Outputs
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 outputs require external pull-up resistors for proper logical operation
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
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
5 5V
Output Voltage
7V
Operating Free Air Temperature Range
DM54
b55 C to a125 C
DM74
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those value...
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