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Texas Instruments PCA9518DW — Discrete Semiconductors
Texas Instruments

PCA9518DW I²C Buffer, 3V-3.6V, 20-SOIC, Active

MPNPCA9518DW
End of Life

Texas Instruments PCA9518DW, I²C buffer, 3V–3.6V supply, 20-SOIC (0.295", 7.50mm Width), surface mount, Tube, active lifecycle.

$2.59Ref. price · indicative, final on quote
PCA9518DW datasheet
Packaging20-SOIC (0.295", 7.50mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

PCA9518DW Technical Specifications
ParameterValue
Mounting typeSurface Mount
Voltage3V ~ 3.6V
InterfaceI²C
PackageTube
ApplicationsBuffer
Case20-SOIC (0.295\", 7.50mm Width)

Product details

What the PCA9518DW is and where it fits

The Texas Instruments PCA9518DW is a specialized I²C interface buffer IC in a 20-pin SOIC package. It sits between a master I²C controller and a segmented bus, buffering the clock (SCL) and data (SDA) lines to extend the physical reach or increase the fan-out of the bus. The supply range of 3V to 3.6V makes it a direct fit for standard 3.3V I²C domains found in telecom line cards, industrial control backplanes, and multi-board server systems where a single I²C segment must span several connectors.

Supply voltage — the fit gate for 3.3V I²C buses

The PCA9518DW operates from 3V to 3.6V, covering the nominal 3.3V rail.

Package and mounting — 20-SOIC wide body

The part comes in a 20-SOIC package with 0.295-inch (7.50 mm) body width — the wide SOIC variant. It is a surface-mount device.

Lifecycle and compliance

The PCA9518DW carries an active lifecycle status and is ROHS3 compliant. There is no end-of-life notice, no last-time-buy window.

Frequently asked questions

What is the difference between PCA9518DW and PCA9518DWR?

The die and electrical specifications are identical. The only difference is the shipping medium: PCA9518DW ships in Tube, while PCA9518DWR ships in Tape & Reel.

Does PCA9518DW require external pull-up resistors?

Yes, as a standard I²C buffer, the PCA9518DW requires external pull-up resistors on the SCL and SDA lines on both the master and buffered bus segments. The resistor value depends on the bus capacitance and the desired rise time.

Is PCA9518DW compatible with 3.3V I²C logic?

Yes, the 3V to 3.6V supply range covers 3.3V nominal operation, so it is fully compatible with 3.3V I²C logic levels.