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Texas Instruments SN74LVC646APW — Logic ICs

SN74LVC646APW 74LVC 8-bit Transceiver, 1.65V–3.6V, 24-TSSOP

MPNSN74LVC646APW
End of Life

Texas Instruments 74LVC series, SN74LVC646APW, 8-bit non-inverting transceiver with 3-state outputs, 1.65V–3.6V supply, 24mA output drive, -40°C to 85°C, surface-mount 24-TSSOP package.

$1.88Ref. price · indicative, final on quote
Packaging24-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
Series74LVC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74LVC646APW specifications
ParameterValue
Series74LVC
Logic typeTransceiver, Non-Inverting
Output type3-State
MountingSurface Mount
Supply voltage1.65V ~ 3.6V
Current - output high, low24mA, 24mA
Operating temperature-40°C ~ 85°C (TA)
PackageTube
Case24-TSSOP (0.173\", 4.40mm Width)
Number of elements1
Number of bits per element8

Product details

8-bit transceiver for mixed-voltage buses

Supply voltage and bus compatibility

The 1.65V to 3.6V supply range means this part can sit on a 3.3V backplane and still talk to a 1.8V FPGA bank without a dedicated translator — the transceiver's inputs and outputs track the supply rail. At 3.3V the 24 mA drive gives clean edges on short stubs; at 1.8V the drive current is lower but still adequate for point-to-point links under a few inches. If your bus has more than a handful of loads, budget a derating check at the lower supply corner.

Housed in a 24-TSSOP package with a 4.40mm body width (0.173"), it fits a standard 0.65mm-pitch TSSOP-24 footprint. The 3-state outputs let you share the bus with other transceivers or a microcontroller without contention; the output-enable control (not detailed here) is typically active-low per the 74LVC convention.

For new designs, there is no LTB risk; the part is available through the standard TI distribution channel and independent supply.

Frequently asked questions

How many bits per element does SN74LVC646APW have?

It has 8 bits per element, with a single element (one 8-bit transceiver) in the package.

Is SN74LVC646APW RoHS compliant?

Yes, it is ROHS3 compliant.