That means the manufacturer has ended production and the last-time-buy window is past. New stock is no longer flowing from TI; any units on the market are existing inventory held by distributors or surplus brokers.
What this LVDS driver does
The DS90LV027MX is a dual LVDS driver from Texas Instruments, designed to convert a single-ended TTL/CMOS signal into a differential LVDS output at 155 Mbps per channel.
Sourcing reality on an obsolete line
Because the DS90LV027MX is obsolete, there is no franchised distributor holding fresh factory stock. Every unit available today is either old-date-code inventory from a distributor's shelf or surplus that has been through the independent channel. The price and lead time vary with the lot size and date code, and the only way to lock availability is to submit an RFQ. If the BOM can tolerate a pin-compatible alternative, the DS90LV027A (the later-generation version) is worth evaluating — it shares the same footprint and 155 Mbps rating, but check its own lifecycle status before committing.