INDUSTRY'S FASTEST 4-MBIT SRAM JUST GOT FASTER
SAN JOSE, Calif., June 1, 1998 -- Sony Semiconductor Company of America (SSA), a divisional company of Sony
Electronics Inc., today announced 4-Mbit SRAM products offering the industry's fastest cycle times. With speeds
of up to 3.3ns (300MHz), the enhanced CXK77B Late-Write High-Speed Synchronous SRAM family is ideal for use in
workstations and mainframe computers, as well as large bandwidth, high-throughput buffer applications for high-speed
network routers, hubs and backbone switches.
"With the rapid advancement of processors, SSA has continuously led the industry with high speed memory
products to maximize system performance," said Hiro Ino, senior manager, memory marketing, SSA. "As a result,
if you've only got a few nanoseconds to turn around massive amounts of data, only Sony is prepared to deliver 4-Mbit
SRAM solutions."
Sony has also recently enhanced the industry leading CXK77B family to meet the demand for faster SRAM to complement
faster processors. The chips follow a Late Write protocol. During a write operation, data is provided to the SRAM
one clock cycle after the address and control signals. This eliminates the need for a bus-turn-around cycle when
changing from a read to a write operation and substantially reduces dead cycle times. Originally introduced in
June 1997 at 4.5ns speeds, these industry leading SRAM have undergone an all-layer change and die revision, and are
now 27 percent faster.
With speeds up to 3.3ns (300 MHz), the CXK77B3640AGB and CXK77B1840AGB are HSTL input/output compatible while the
CXK77B3641AGB and CXK77B1841AGB are LVTTL/LVCMOS compatible. The CXK77B3640AGB/ CXK77B3641AGB are configured as 128k x
36 bits, while the CXK77B1840AGB/1841AGB are by 256k x 18 bits. These 4-Mbit SRAMs are processed using a 0.35 micron
BiCMOS process. All products require 3.3V power supply.
SSA's SRAMs are packaged as 119 pin, (7X17) 1.27mm pitch, 14mm x 22mm plastic ball grid arrays and provide
design engineers with a highly integrated solution. Each SRAM includes input registers, high-speed SRAM, output
registers/latches, and a one-deep write buffer in a single monolithic chip solution. They offer four programmable
modes to optimize performance in a variety of applications.
Sample and production quantities are currently available for the CXK77B series and cost approximately $100 when
ordered in 1,000 piece quantities.
Based in San Jose, Calif., SSA is a leading manufacturer of integrated circuits. Since 1983, Sony has designed,
engineered and manufactured products for the U.S. semiconductor market. The company is a leading supplier and
technology leader in the development of semiconductor solutions for emerging and cutting-edge high performance
markets in multimedia, communications and ultra high speed SRAM memory. Currently it offers a diverse array of
innovative products ranging from memory to multimedia, communications, networking and wireless ICs.
Vertically integrated for fast product development and production, Sony is positioned to respond quickly to customer
needs with a state-of-the-art design center in San Jose and wafer fabrication facilities in San Antonio, Texas.
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