- 2 -

Rev 3.1

July. 2004

K7R163684B

K7R161884B

36 (or 18)

Q(Data Out)

(Echo Clock out)

CQ, CQ

72

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

.

• Separate independent read and write data ports

with concurrent read and write operation

• 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 4-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 (x18, x36) function.

• Sepatate read/write control pin(R and W)

• Simple depth expansion with no data contention.

• Programmable output impenance.

• JTAG 1149.1 compatible test access port.

• 165FBGA(11x15 ball array FBGA) with body size of 13x15mm

R

ADDRESS

W

C

C

D(Data in)

ADD

REG

DATA

REG

CLK

GEN

CTRL

LOGIC

512Kx36

(1Mx18)

MEMORY

ARRAY

WRITE DRIVER

K

K

36 (or 18)

SELECT OUTPUT CONTROL

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

72

17

17 (or 18)

4 (or 2)

72(or 36)

72(or 36)

144

Organization

Part

Number

Cycle

Time

Access

Time

Unit

X36

K7R163684B-FC30

3.3

0.45

ns

K7R163684B-FC25

4.0

0.45

ns

K7R163684B-FC20

5.0

0.45

ns

K7R163684B-FC16

6.0

0.50

ns

X18

K7R161884B-FC30

3.3

0.45

ns

K7R161884B-FC25

4.0

0.45

ns

K7R161884B-FC20

5.0

0.45

ns

K7R161884B-FC16

6.0

0.50

ns

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

(or 18)

(or 36)

(or 36)

(or 72)