IDT Announces New 3.3-Volt and Higher-Speed 5-Volt Synchronous Dual-Port Memories
IDT First to Ship Production Quantity of New 66-MHz and 3.3-Volt Dual-Ports
SANTA CLARA, Calif.--(BUSINESS WIRE)--June 8, 1998--IDT (NASDAQ:IDTI - news), the
world's leading supplier of multi-ported memory products, today expanded its dual-port family with the
introduction of 3.3-volt synchronous dual-port SRAMs as well as speed enhanced versions of its
existing 5-volt products.
IDT is the first supplier to ship production quantities of the 50-MHz, 3.3-volt dual-port memories and
the 5-volt memories running at 66 MHz. The enhanced dual-port family includes four 256-Kbit devices
and four 512-Kbit devices, available in both x8 and x16 configurations. These dual-ports provide higher
bandwidth, making them ideal for applications in the data communications and telecommunications
markets, including LAN and WAN switches, routers, hubs, PBX switches and cellular base stations.
''As the industry transitions to lower-voltage products, designers are increasingly specifying
applications that require 3.3-volt interfaces. Components such as processors, DSPs and FPGAs already run at 3.3 volts and have difficulty interfacing with higher-voltage memories,'' said Carl May, specialty memory products marketing manager for IDT. ''The new 3.3-volt synchronous dual-ports provide an ideal solution to these problems by operating at a lower voltage while providing all the benefits of a synchronous interface and a dual-ported memory.''
The new dual-ports feature a synchronous interface that allows for ease of design and provides a
simple, fast way to move data in and out of separate ports of a common memory. The new products run at speeds of 50 MHz and 66 MHz, making them the highest-performance shared memory solution
available. They feature shorter cycle times, enabling higher bandwidth for designers of high performance systems, including LAN switches, routers and base stations. All pro maximum flexibility with separate clocks per port and separate internal counters. The separate clocks enable the two ports to run at different speeds, while separate internal counters simplify the burst operations by eliminating the need to generate addresses on each rising clock edge.
Dual-Port Memory Advantages
Dual-port memories provide higher bandwidth than all other types of memory solutions, including
multiplexed SRAM. The memories double bandwidth by allowing simultaneous access to a common
memory array through two ports. In multi-processor applications, the result from one processor is
loaded into memory, while an earlier result is accessed by another processor. This ability to
accommodate two independent operations makes the chips useful as buffers in networking applications where an incoming stream of data is stored, while at the same time a previously stored block of data is processed.
Pricing and Availability
All 66-MHz and 50-MHz synchronous pipelined dual-port SRAMs in both 5- and 3.3-volt versions are
currently available. Prices range from $23.80 to $39.95 in 10,000-piece quantities, as illustrated in
the table below. Flow-through devices as fast as 40 MHz are also available, with 5-volt and 3.3-volt
versions in 512-Kbit densities only.
Part Number Configuration Supply Max Speed Pin/Pkg Price/Qty
Voltage
709079 32Kx8 5V 66 MHz 100/TQFP 23.80/10K
70V9079 32Kx8 3.3V 50 MHz 100/TQFP 25.75/10K
709269 16Kx16 5V 66 MHz 100/TQFP 23.80/10K
70V9269 16Kx16 3.3V 50 MHz 128/TQFP 25.75/10K
709089 64Kx8 5V 66 MHz 100/TQFP 36.90/10K
70V9089 64Kx8 3.3V 50 MHz 100/TQFP 39.95/10K
709279 32Kx16 5V 66 MHz 100/TQFP 36.90/10K
70V9279 32Kx16 3.3V 50 MHz 128/TQFP 39.95/10K
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