IS43DR16640C-25DBLI-TR

• 1 Gb Density DDR2 SDRAM
• 16-Bit Wide Data organization, Synchronous
• 84-Pin TWBGA Surface-Mount Package
• 1.7 V to 1.9 V Supply Voltage Range
• 400 Ps Access Time
• Tape and Reel packaging; Production Lifecycle Status
• RoHS Non-Compliant Ordering Option

The ISSI IS43DR16640C-25DBLI-TR is a 1 Gb DDR2 SDRAM device in an 84-pin TWBGA package, organized as a 16-bit wide synchronous memory. It operates from a 1.7 V to 1.9 V supply with a 400 ps access time and is supplied on tape and reel for surface-mount assembly. DDR2 SDRAM remains in production for long-lifecycle designs whose processors and memory controllers predate DDR3, where redesigning the board is more expensive than sourcing legacy memory. This ordering option of the IS43DR16640C-25DBLI-TR is designated RoHS non-compliant.

Legacy DDR2 devices are sourced almost entirely for sustaining engineering: keeping industrial controllers, medical equipment, networking line cards, printers, set-top boxes, and transportation and defense systems in production long after the memory generation left the mainstream. ISSI in particular serves this market with extended-availability parts, so buyers here are typically maintaining an existing bill of materials rather than starting a new design. The RoHS non-compliant designation on this ordering option may restrict use in markets with RoHS enforcement and should be confirmed against the target region. Typical buyers are sustaining and obsolescence engineers, industrial and medical equipment OEMs, and contract manufacturers supporting long-lifecycle builds.