E1 Quad Transceiver in a 100-LQFP
The Maxim Integrated DS21Q59L+ is a quad transceiver IC for telecom line interface applications. It packs four independent transceivers into a single 100-LQFP package, operating from a 3.14 V to 3.47 V supply and drawing 230 mA typical.
Temperature Grade and Environment
Rated 0°C to 70°C, this is a commercial-temperature part. It fits indoor telecom equipment, central-office line cards, and controlled-environment racks. Not specified for outdoor or industrial cabinets without active cooling or extended-temperature qualification.
Package and Assembly
The 100-LQFP (14x14 mm body) is a hand-solderable SMD package. For production, a stencil and reflow profile are recommended; for rework or prototyping, a fine-tip iron and flux work.
Lifecycle and Sourcing
The DS21Q59L+ is listed as Active with ROHS3 compliance. No end-of-life notice or last-time-buy window is indicated. For BOM planning, this part is suitable for new designs and ongoing production without near-term obsolescence risk.