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Texas Instruments CD74AC540M — Logic ICs

Texas Instruments CD74AC540M Buffer Inverting, 3-State

MPNCD74AC540M
End of Life

Texas Instruments 74AC series Buffer, Inverting, 8-bit, 3-State outputs, 1.5V–5.5V supply, 24mA drive, -55°C to 125°C, 20-SOIC (7.50mm width), Tube.

$1.29Ref. price · indicative, final on quote
Texas Instruments CD74AC540M datasheet (PDF)
Packaging20-SOIC (0.295", 7.50mm Width)
RoHSROHS3 Compliant
Series74AC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CD74AC540M specifications
ParameterValue
Series74AC
Logic typeBuffer, Inverting
Output type3-State
MountingSurface Mount
Supply voltage1.5V ~ 5.5V
Current - output high, low24mA, 24mA
Operating temperature-55°C ~ 125°C (TA)
PackageTube
Case20-SOIC (0.295\", 7.50mm Width)
Number of elements1
Number of bits per element8

Product details

Buffer, inverting, 8-bit — what the 74AC family brings

The CD74AC540M: The 3-state outputs let you share a bus without contention — pull the output-enable pin high and the outputs go high-impedance, releasing the bus to another driver.

Package is 20-SOIC with 0.295" body width, supplied in Tube.

ROHS3 compliant, so it ships lead-free and meets EU RoHS requirements without an exemption. No AEC-Q automotive qualification cited, so it stays in industrial/military/commercial domains unless you qualify it yourself.

Frequently asked questions

Is CD74AC540M RoHS compliant?

Yes, the CD74AC540M is ROHS3 compliant — it meets the latest EU RoHS directive without exemptions.

What is the replacement or equivalent for CD74AC540M?

The CD74AC540M is an active part with no official replacement. For a functional alternative in a different logic family, the SN74ABT2245DW is a TI 74ABT transceiver with 3-state outputs, but it is non-inverting and has a narrower 4.5V supply and commercial temperature range — verify the logic polarity and voltage before substituting.