Wave Issue 2003 1/19/00 Article 1-01

***Fujitsu Sampling Fast Cycle RAM with Double Data Rate SDRAM
Interface
(January 19)

Fujitsu Limited and Fujitsu Microelectronics (FMI) introduced
samples of the company's 64 Megabit Fast Cycle RAM (FCRAM) with
Double Data Rate (DDR) SDRAM interface. Designed for graphics and
multimedia applications, the FCRAM features high speeds and low
power consumption.

The 64 Megabit FCRAM with DDR interface is the first in a series
of Application Specific Memory (ASM) products based on the FCRAM
architecture, which was introduced in June 1998 at the VLSI
Symposium as Fujitsu's next generation of high-speed memory
technology. The ASMs announced feature a 200 MHz clock speed, DLL
controlled output, and a 400 Megabit/second/pin data transfer
rate. All versions use page mode operation. Random access speeds
are very high, with the fastest random cycle time measured at 30
nanoseconds.

The products in Fujitsu's series reflect the diversity of
applications that can be served using the FCRAM core technology.
FCRAM includes memory array segmentation and internal pipelining
that speed random access and reduce power consumption.

The specifications for each model of Fujitsu's DDR FCRAM are:

Clock Write I/O
Model frequency latency Power Interface Package
MB81P643287-50 200 MHz max 1 2.5V SSTL_2 TSOP-86
MB81P643287-60 167 MHz max 1 2.5V SSTL_2 TSOP-86
MB81N643289-50 200 MHz max CL-1 2.5V CMOS TSOP-86
Source Termination
MS81N643289-60 167 MHz max CL-1 2.5V CMOS TSOP-86
Source Termination

The MB81P643287 / MB81N643289 Series are available in samples,
with prices beginning at $25 each per unit. In conjunction with
the announcement of FCRAM, Fujitsu announced that it will offer
Denali Software's simulation model for the 64Mbit FCRAM with DDR
interface. The model utilizes Denali's Specification of Memory
Architecture (SOMA) language to support the full-timing, full-
function simulation needed by system designers to verify complex
designs. The model will be available on Fujitsu's web site as
part of its online memory datasheet.