ICS83840AHLFT datasheet(1/8 Pages) ICST

Part #	ICS83840AHLFT

Description	DDR SDRAM MUX

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Manufacturer	ICST [Integrated Circuit Systems]

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83840AH

www.icst.com/products/hiperclocks.html

REV. A DECEMBER 22, 2003

1

Integrated

Circuit

Systems, Inc.

ICS83840

DDR SDRAM MUX

GENERAL DESCRIPTION

The ICS83840 is a DDR SDRAM MUX and is

a member of the HiPerClock S™ family of High

Performance Clock Solutions from ICS. The

device has 10 Host Lines and each host line can

be passed to 4 Data Ports. The 10 channels are

allocated as follows in the DDR SDRAM application: 8 data

lines, 1 strobe line and 1 DQm line. The Host/Data Ports are

compatible with single-ended SSTL-2 and the device oper-

ates from a 2.5V supply.

Guaranteed low output skew makes the ICS83840 ideal for

demanding applications which require well defined perfor-

mance and repeatability.

LOGIC DIAGRAM

FEATURES

• 40 low skew single-ended DIMM ports

• 4 SSTL-2 compatible enable inputs

• Maximum Switching Speed: 3ns

• Output skew: 120ps (maximum)

• Bank skew: 45ps (maximum)

• r

on = 8

Ω (typical)

• Full 2.5V supply modes

• 0°C to 70°C ambient operating temperature

• Pin compatible with the CBTV4010

HiPerClockS™

ICS

SIMPLIFIED SCHEMATIC

HPx

nSn

nDPx

SW

400

Ω

HP0

0DP0

1DP0

2DP0

3DP0

HP9

Sw

0DP9

1DP9

2DP9

3DP9

Sw

nS0

nS1

nS2

nS3

RON

ICS83840

64-Ball TFBGA

7mm x 7mm x 1.2mm

package body

H Package

Top View

PIN ASSIGNMENT

V

D

1

S

nc

n0

P

D

10

P

D

20

P

D

31

P

D

21

P

D

32

P

D

0

2

S

nV

D

0

S

nD

N

G0

P

D

00

P

H1

P

D

01

P

D

11

P

HD

N

G2

P

D

1

c

n3

S

n

2

P

H2

P

D

2

D

N

G

2

P

D

3

9

P

D

29

P

D

3

P

D

03

P

D

1

9

P

D

19

P

H

3

P

H3

P

D

2

9

P

D

08

P

D

3

D

N

G3

P

D

3

8

P

D

2

4

P

D

0

8

P

D

18

P

H

4

P

H4

P

D

1

8

P

D

0D

N

G7

P

H7

P

D

06

P

D

36

P

HD

N

G5

P

D

35

P

H4

P

D

34

P

D

2

7

P

D

37

P

D

27

P

D

16

P

D

26

P

D

16

P

D

05

P

D

25

P

D

15

P

D

0

1

2

34

5

6

789

10

11

A

B

C

D

E

F

G

H

J

K

L

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