Analog Devices Inc./Maxim Integrated DS3181

The DS3181 maps and demaps ATM cells and HDLC packets over a single DS3, E3 or clear-channel 52 Mbps copper interface. Its integrated line interface unit performs receive clock/data recovery and transmit waveshaping, while framer and processor blocks bridge the line to a system-side UTOPIA or POS-PHY interface. Analog Devices identifies this legacy Maxim device as obsolete.

Maxim ordering information specifies the unsuffixed DS3181 as a 400-lead TE-PBGA, 27 mm by 27 mm with 1.27 mm pitch. LCDChip lists 400-BBGA, and the package register maps that catalog name to 400-BBGA.jpg. The local JPG is absent; package artwork and land-pattern verification remain open.

Assembly checks

• Compare the ball map and pin-one orientation with the Maxim drawing.
• Verify 27 mm body, 1.27 mm pitch and board land pattern.
• Confirm moisture handling and rework rules for the supplied lot.

Do not publish until the registered JPG and exact footprint are checked.

The Maxim data sheet contains a DS3181-specific 400-ball assignment table. These functional groups summarize connectivity but do not replace the numbered ball map.

Verify every ball number and revision-specific erratum before changing a board.

Use the data sheet for electrical limits, clocking, package drawing and revision errata.

DS3181N has an industrial temperature range; DS3181+ is a separate lead-free ordering option. The multiport DS3182–DS3184 family can share a package concept but is not automatically interchangeable. Verify ball map, firmware register configuration, supply rails, line transformers, framing mode, timing, compliance and lot revision before substitution. No unverified internal alternative link is included.

The Analog Devices product page and hosted Maxim Rev. 3 data sheet are the primary technical sources. The ordering table distinguishes unsuffixed DS3181 from DS3181N and the optional plus suffix. Analog Devices calls DS3181 obsolete; marketplace listings may describe their own inventory as active and should not be mistaken for a manufacturer lifecycle statement.

Inspect the complete DS3181 marking, package and ball condition, revision, date and lot code, storage history and supply-chain traceability. The obsolete designation and documented errata make revision and lot checks important. This listing does not claim that stock was electrically retested or factory authorized.

Keep this detail under review until the 400-BBGA JPG, exact TE-PBGA footprint, revision errata, lot traceability and current qualified distributor price are verified. Do not publish while any gate remains open.