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Fairchild Semiconductor - Quad 2-Input NAND Buffers with Open-Collector Outputs

Numéro de référence DM7438N
Description Quad 2-Input NAND Buffers with Open-Collector Outputs
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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DM7438N fiche technique
September 1986
Revised February 2000
DM7438 • 7438
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
operation.
Pull-Up Resistor Equations
Where:
N1 (IOH) = total maximum output high current
for all outputs tied to pull-up resistor
N2 (IIH) = total maximum input high current for
all inputs tied to pull-up resistor
N3 (IIL) = total maximum input low current for
all inputs tied to pull-up resistor
Ordering Code:
Order Number Package Number
Package Description
DM7438M
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM7438N
N14A
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
7438SJ
M14D
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Y = AB
Inputs
AB
LL
LH
HL
HH
H = HIGH Logic Level
L = LOW Logic Level
Output
Y
H
H
H
L
© 2000 Fairchild Semiconductor Corporation DS006513
www.fairchildsemi.com

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