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TSB81BA3E: Cross refrence for TSB81BA3IPFP

Alshaimaa Elakkad
Prodigy 10 points

Part Number: TSB81BA3E
Other Parts Discussed in Thread: TUSB7340

Hello

Please I want a drop-in replacement (cross reference) for this TI part (TSB81BA3IPFP) as it's obsolete now.

Thanks

Alshaimaa

  • 0
    TI__Guru**** 158955 points

    Hi Alshaimaa:

       Let  me check if  there is replacement .

    Best

    Brian

  • 0
    Prodigy 163 points

    Hello Alshaimaa,

    Thank you for your query and for providing the detailed documents. The part TSB81BA3IPFP is a Texas Instruments (TI) IEEE 1394a (FireWire) 3-port cable transceiver/arbiter (OHCI-compliant PHY/Link Layer Controller), in an 80-pin TQFP package. It's indeed obsolete (EOL since ~2009–2010), with no new production.

    Replacement Options

    There is no 100% pin-to-pin, drop-in replacement due to the specialized IEEE 1394a protocol and aging technology. FireWire is largely discontinued, so alternatives focus on functional equivalents or migrations to USB/Thunderbolt. Here's a prioritized list:

    Priority Recommended Replacement Manufacturer Key Specs / Compatibility Pin-Compatible? Availability (2026) Price (USD, est.) Notes
    1 TSB81BA3E or TSB81BA3D TI IEEE 1394a 3-port PHY/Link, same function Yes (drop-in for most apps) Low (gray market) $10–20 TI's revised version, minor bug fixes; if available, best match.
    2 LGS 1394A PHY (e.g., LGS-3P) LGS/Generic 3-port FireWire PHY/Link Partial Medium (China suppliers) $5–15 Low-cost clone, functional equivalent; test for reliability.
    3 Migrate to USB 3.0/Thunderbolt (e.g., TI TUSB7340) TI USB 3.0 4-port hub controller No (redesign needed) High $8–12 Modern upgrade; FireWire is obsolete—switch to USB for future-proofing.
    4 NEC uPD720200 Renesas IEEE 1394a 2-port host controller No Low $12–25 Similar protocol, but fewer ports; requires adapter.
    5 Custom FPGA Solution (e.g., Xilinx Artix-7) AMD/Xilinx Programmable IEEE 1394 IP core No (full redesign) High $50+ (dev board) For long-term; implement FireWire in FPGA if volume justifies.

    Best Option: TSB81BA3E (if you can find stock) — closest to original, minor improvements. Check Rochester Electronics for EOL stock.

    Why No Perfect Replacement?

    • FireWire (IEEE 1394a) is legacy tech; most manufacturers stopped production.
    • Functional migration to USB is common.
    • You can visit WWW.ACEICC.COM; they can give you great advice.