74LS140 Datasheet – Dual 4-input NAND 50Ω Line Drive

Part Number: 74LS140

Function: LSTTL Dual 4-input NAND

Package: DIP 14 Pin Type

Manufacturer: TW, BDTIC


74LS140 Datasheet Pinout


The 74LS140 is 4-input NAND gates, 50-Ohm line drivers.

In computer science, NAND is a logic gate that produces a logical “NOT-AND” output from two logical inputs. In addition to being a fundamental building block of digital circuits, NAND gates are also used to construct other logic gates, such as OR and NOT gates.


Logic symbols

Typical parameters: tpd = 12ns Pd = 4.3mW

74LS140 pinout


74LS140 Logic Table

74LS140 Logic Table


Recommended Operating Conditions

Operating Conditions

74LS140 Datasheet



Other data sheets are available within the file:  54LS140

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