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256Mb High-Speed CMOS SDRAMs Offered in the 54-Pin TSOP II Package

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SAN CARLOS, Calif. — Alliance Memory extended its offering of 256Mb high-speed CMOS SDRAMs with new x8 and x4 devices in the 54-pin 400-mil plastic TSOP II package.

Internally configured as four banks of 32M x 8 bits and 64M x 4 bits, respectively, the AS4C32M8SA and AS4C64M4SA provide reliable drop-in, pin-for-pin-compatible replacements for a number of similar solutions used for image storage and video buffering in consumer and industrial products, and wearables. The SDRAMs offer a synchronous interface, operate from a single +3.3V (± 0.3V) power supply, and are lead (Pb)- and halogen-free.

The devices released feature fast access time from clock down to 5.4 ns and clock rates to 166 MHz, and they are available in commercial (0 °C to +70 °C) and industrial (-40 °C to +85 °C) operating temperature ranges. The SDRAMs offer programmable read or write burst lengths of 1, 2, 4, 8, or full page, with a burst termination option. 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.

Samples and production quantities of the new SDRAMs are available now, with lead times of four to eight weeks for large orders. Pricing for U.S. delivery starts at $1.95 per piece.

More information about Alliance Memory is available online at www.alliancememory.com.

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