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Texas Instruments SN74HC540PWR — Logic ICs

SN74HC540PWR Buffer, Inverting, 3-State, 20-TSSOP, 2V-6V

MPNSN74HC540PWR
End of Life

Texas Instruments 74HC series, SN74HC540PWR, Buffer, Inverting, 3-State, 2V ~ 6V supply, 7.8mA output drive, -40°C ~ 85°C, 20-TSSOP package.

$0.74Ref. price · indicative, final on quote
Packaging20-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Series74HC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74HC540PWR specifications
ParameterValue
Series74HC
Logic typeBuffer, Inverting
Output type3-State
MountingSurface Mount
Supply voltage2V ~ 6V
Current - output high, low7.8mA, 7.8mA
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case20-TSSOP (0.173\", 4.40mm Width)
Number of elements1
Number of bits per element8

Product details

What the 2V–6V supply and 7.8 mA drive mean for your bus

Its supply range of 2V to 6V lets it interface directly with 3.3V and 5V logic domains without a level translator, and the symmetric 7.8 mA source and sink drive handles typical CMOS fan-out to a handful of load gates or a short PCB trace. The single-element, 8-bit-per-element architecture means one package replaces eight discrete inverters, saving board area and BOM line count.

Industrial temperature grade — where it runs

The 74HC series CMOS process keeps quiescent current low across the temperature range, so the buffer doesn't add a thermal load to the board.

Frequently asked questions

What is the difference between SN74HC540 and SN74HC540PWR?

The 'SN74HC540' without the suffix typically refers to the same die in a different package or tube packaging. The electrical specifications are identical.