Alliance Memory launches 256Mbit CMOS SDRAMs in 54-pin TSOP II

Alliance Memory extends its offering of 256Mbit, high-speed CMOS SDRAMs. The x8 and x4 devices are supplied in a 54-pin, 400-mil plastic TSOP II package.

Alliance Memory’s product line- up offers densities from 16 to 512Mbit in a range of configurations and packages. These AS4C32M8SA and AS4C64M4SA SDRAMs complement the existing x16 and x32 parts.

Internally configured as four banks of 32M x 8 bits and 64M x 4 bits, respectively, the AS4C32M8SA and AS4C64M4SA are reliable drop-in, pin-for-pin-compatible replacements for devices 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 AS4C32M8SA and AS4C64M4SA have fast access time from clock down to 5.4 nano seconds and clock rates to 166MHz. They are available in commercial (0 to +70 degree C) and industrial (-40 to +85 degree C) operating temperature ranges. The SDRAMs offer programmable read or write burst lengths of one, two, four, eight, 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. Refresh functions include auto- or self-refresh, and a programmable mode register allows the system to choose the most suitable modes to maximise performance.

Samples and production quantities of the new SDRAMs are available now, with lead times of four to eight weeks for large orders.

Alliance Memory provides critical and hard-to-find DRAM and SRAM memory ICs for the communications, computing, consumer electronics, medical, automotive, and industrial markets. The company’s product range includes DRAMs and SRAMs with commercial, industrial, and automotive operating temperature ranges and densities from 64kbit to 8Gbit. It is a privately held company, with headquarters in San Carlos, California, USA and regional offices in Europe, Asia, and South America.

WEARTECHDESIGN.COM – Latest News/Advice on Technology for Wearable Devices

Weartechdesign is unlike any other website currently serving the technology
for wearable devices. We carry the very latest news for design engineers and purchasers.
Register on our mailing list to receive regular updates and offers from


About Weartech

This news story is brought to you by, the specialist site dedicated to delivering information about what’s new in the wearable electronics industry, with daily news updates, new products and industry news. To stay up-to-date, register to receive our weekly newsletters and keep yourself informed on the latest technology news and new products from around the globe. Simply click this link to register here: