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The AS4C128M16D2 features a clock rate of 400 MHz and a data rate of 800 Mbitspin Image courtesy of Alliance Memory
<p>The <span data-scayt-lang="en_US" data-scayt-word="AS4C128M16D2">AS4C128M16D2</span> features a clock rate of 400 MHz and a data rate of 800 <span data-scayt-lang="en_US" data-scayt-word="Mbits">Mbits</span>/pin. (Image courtesy of Alliance Memory).</p>

High-Speed Double Data Rate 2 (DDR2) Synchronous DRAMs Provides 2-Gbit Density

Alliance Memory recently broadened its lineup of high-speed CMOS double data rate 2 synchronous DRAMs (DDR2 SDRAM) with a new device featuring high 2-Gbit density in a low-profile FBGA package. Available from a very limited number of suppliers, the AS4C128M16D2 is offered in commercial (0 °C to +85 °C) and industrial (-40 °C to + 95 °C) temperature ranges.

The AS4C128M16D2 provides a drop-in, pin-for-pin-compatible replacement for a number of similar solutions in automotive, industrial, consumer, networking, and medical products requiring high memory bandwidth. The device is internally configured as eight banks of 16M x 16 bits. The DDR2 SDRAM offers a synchronous interface, operates from a single + 1.8-V (± 0.1 V) power supply, and is RoHS-compliant.

The AS4C128M16D2 features a clock rate of 400 MHz and a data rate of 800 Mbits/pin. The DDR2 SDRAM provides programmable read or write burst lengths of 4 or 8. An auto pre-charge function provides a self-timed row pre-charge initiated at the end of the burst sequence. Easy-to-use refresh functions include auto- or self-refresh while a programmable mode register allows the system to choose the most suitable modes to maximize performance.

With the addition of the AS4C128M16D2, Alliance Memory now offers an extensive lineup of DDR2 SDRAMs featuring densities of 512 Mb, 1 Gbit, and 2 Gbits. Samples of the AS4C128M16D2 are available now, with lead times of six to eight weeks for production quantities. Pricing for U.S. delivery starts at $6.50 per piece. 

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