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MOS INTEGRATED CIRCUIT

18M-BIT DDRII SRAM SEPARATE I/O

2-WORD BURST OPERATION

Document No. M15823EJ7V

1DS00 (7th edition)

Date Published

July 2004 NS CP(K)

Printed in Japan

DATA SHEET

2001

Description

The

technology using full CMOS six-transistor memory cell.

The

burst counter. All input registers controlled by an input clock pair (K and /K) are latched on the positive edge of K and

/K.

These products are suitable for application which require synchronous operation, high speed, low voltage, high

density and wide bit configuration.

These products are packaged in 165-pin PLASTIC BGA.

Features

• 1.8 ± 0.1 V power supply and HSTL I/O

• DLL circuitry for wide output data valid window and future frequency scaling

• Separate independent read and write data ports

• DDR read or write operation initiated each cycle

• Pipelined double data rate operation

• Separate data input/output bus

• Two-tick burst for low DDR transaction size

• Two input clocks (K and /K) for precise DDR timing at clock rising edges only

• Two output clocks (C and /C) for precise flight time and clock skew matching-clock

and data delivered together to receiving device

• Internally self-timed write control

• Clock-stop capability with

• User programmable impedance output

• Fast clock cycle time : 4.0 ns (250 MHz), 5.0 ns (200 MHz), 6.0 ns (167 MHz)

• Simple control logic for easy depth expansion

• JTAG boundary scan