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Texas Instruments SN74S140D — Analog & Data Acquisition
Texas Instruments

SN74S140D 74S Dual 4-Input NAND Gate, 6 ns Propagation Delay

MPNSN74S140D
End of Life

Texas Instruments 74S series, SN74S140D, dual 4-input NAND gate, 6 ns propagation delay at 5V/150pF, 40 mA low / 60 mA high output current, 4.75V–5.25V supply, 0°C to 70°C, 14-SOIC package.

$3.26Ref. price · indicative, final on quote
SN74S140D datasheet
Packaging14-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
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Specifications

SN74S140D Technical Specifications
ParameterValue
Series74S
Logic typeNAND Gate
Mounting typeSurface Mount
Voltage4.75V ~ 5.25V
Current - output high, low40mA, 60mA
Number of inputs4
Operating temperature0°C ~ 70°C
PackageTube
Case14-SOIC (0.154\", 3.90mm Width)
Number of circuits2
Input logic level - low0.8V
Input logic level - high2V
Max propagation delay @ v, max CL6ns @ 5V, 150pF

Product details

Dual 4-input NAND gate in the 74S family

The Texas Instruments SN74S140D is a dual 4-input NAND gate from the 74S Schottky logic family, packaged in a 14-SOIC surface-mount body. It integrates two independent NAND gates, each with four inputs, and operates from a 4.75V to 5.25V supply rail. The 74S series uses Schottky-clamped transistors to achieve higher switching speeds than standard 74LS, with a typical propagation delay of 6 ns at 5V and a 150 pF load. Output drive capability is 40 mA sinking and 60 mA sourcing, which is notably higher than many other 74-series gates — useful for driving multiple fan-out loads or long PCB traces without a buffer. The part is rated for the commercial temperature range of 0°C to 70°C, making it suitable for indoor equipment, office electronics, and general-purpose logic designs where speed and drive strength are priorities.

Output drive: 40 mA low, 60 mA high

The SN74S140D can sink 40 mA and source 60 mA per output.

Lifecycle and supply posture

The SN74S140D carries an Active product status and is ROHS3 compliant.

Frequently asked questions

What is the propagation delay of SN74S140D?

The maximum propagation delay is 6 ns at 5V supply with a 150 pF load. This is the worst-case spec; actual delay with lighter loads (typical CMOS inputs) will be shorter.

What is the equivalent of SN74S140D?

No official second-source alternate is listed. For a functional equivalent, the SN74F00DR (74F quad 2-input NAND) offers similar speed (5 ns) but lower output drive and a different input count. The SN74ALS11ANS (74ALS triple 3-input AND) is a different logic function. For a drop-in dual 4-input NAND, the SN74S140D itself is the direct choice.