2Mx36 & 4Mx18 DDRII CIO b2 SRAM

K7I643682M

K7I641882M

- 3 -

Rev 1.0

Aug. 2005

2Mx36-bit, 4Mx18-bit DDRII CIO b2 SRAM

FEATURES

FUNCTIONAL BLOCK DIAGRAM

• 1.8V+0.1V/-0.1V Power Supply.

• DLL circuitry for wide output data valid window and future

freguency scaling.

• I/O Supply Voltage 1.5V+0.1V/-0.1V for 1.5V I/O,

1.8V+0.1V/-0.1V for 1.8V I/O

.

• Pipelined, double-data rate operation.

• Common data input/output bus .

• HSTL I/O

• Full data coherency, providing most current data.

• Synchronous pipeline read with self timed late write.

• Registered address, control and data input/output.

• DDR(Double Data Rate) Interface on read and write ports.

• Fixed 2-bit burst for both read and write operation.

• Clock-stop supports to reduce current.

• Two input clocks(K and K) for accurate DDR timing at clock

rising edges only.

• Two input clocks for output data(C and C) to minimize

clock-skew and flight-time mismatches.

• Two echo clocks (CQ and CQ) to enhance output data

traceability.

• Single address bus.

• Byte write function.

• Simple depth expansion with no data contention.

• Programmable output impedance.

• JTAG 1149.1 compatible test access port.

• 165FBGA(11x15 ball aray FBGA) with body size of 15x17mm

& Lead Free

LD

ADDRESS

R/W

C

C

ADD REG

&

BURST

LOGIC

DATA

REG

CLK

GEN

CTRL

LOGIC

2Mx36

(4Mx18)

MEMORY

ARRAY

WRITE DRIVER

K

K

4(or 2)

DQ

SELECT OUTPUT CONTROL

Notes: 1. Numbers in ( ) are for x18 device.

20

20 (or 21)

36 (or 18)

36

72

(Echo Clock out)

CQ, CQ

* E : Lead Free Package

* I : Industrial Temperature

Org.

Part

Number

Cycle

Time

Access

Time

Unit

X36

K7I643682M-F(E)C(I)30

3.3

0.45

ns

K7I643682M-F(E)C(I)25

4.0

0.45

ns

K7I643682M-F(E)C(I)20

5.0

0.45

ns

K7I643682M-F(E)C(I)16

6.0

0.50

ns

X18

K7I641882M-F(E)C(I)30

3.3

0.45

ns

K7I641882M-F(E)C(I)25

4.0

0.45

ns

K7I641882M-F(E)C(I)20

5.0

0.45

ns

K7I641882M-F(E)C(I)16

6.0

0.50

ns

36 (or 18)

A0

DDRII SRAM and Double Data Rate comprise a new family of products developed by Cypress, Renesas, IDT, NEC and Samsung technology.

(or 21)

(or 18)

(or 36)

36 (or 18)