![](http://datasheet.mmic.net.cn/230000/ICS83840B_datasheet_15579673/ICS83840B_1.png)
83840BH
www.icst.com/products/hiperclocks.html
REV. A JANUARY 30, 2004
1
Integrated
Circuit
Systems, Inc.
ICS83840B
DDR SDRAM MUX
G
ENERAL
D
ESCRIPTION
The ICS83840B is a DDR SDRAM MUX and is
a member of the HiPerClockS family of High
Performance Clock Solutions from ICS. The de-
vice 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 appli-
cation: 8 data lines, 1 strobe line and 1 DQm line. The Host/
Data Ports are compatible with single-ended SSTL-2 and the
device operates from a 2.5V supply.
Guaranteed low output skew makes the ICS83840B ideal
for demanding applications which require well defined per-
formance and repeatability.
S
IMPLIFIED
S
CHEMATIC
L
OGIC
D
IAGRAM
R
ON
F
EATURES
40 low skew single-ended DIMM ports
4 SSTL-2 compatible enable inputs
Maximum Switching Speed: 3ns
Output skew: 120ps (maximum)
Bank skew: 60ps (maximum)
r
on
= 8
(typical)
Full 2.5V supply modes
0°C to 70°C ambient operating temperature
Pin compatible with the CBTV4010
HiPerClockS
ICS
HPx
nSn
nDPx
SW
400
HP0
0DP0
1DP0
2DP0
3DP0
HP9
Sw
Sw
Sw
Sw
0DP9
1DP9
2DP9
3DP9
Sw
Sw
Sw
Sw
nS0
nS1
nS2
nS3
R
ON
ICS83840B
64-Ball TFBGA
7mm x 7mm x 1.2mm
package body
H Package
Top View
P
IN
A
SSIGNMENT
1
A
B
C
D
E
F
G
H
J
K
L
V
n
n
D
2
c
D
1
S
n
V
n
G
D
3
H
D
3
D
2
H
G
D
2
c
n
S
n
0
0
P
P
D
D
1
0
0
0
P
P
D
H
2
0
1
P
P
D
D
3
0
1
1
P
P
D
H
2
1
P
D
N
P
H
P
D
3
D
0
P
H
N
G
D
0
P
H
D
3
D
1
D
3
G
2
2
2
P
P
P
D
D
D
0
1
2
S
D
3
D
9
P
9
P
P
P
8
P
D
N
P
D
0
D
N
G
1
P
D
1
S
N
2
2
3
3
D
4
P
4
P
P
9
9
9
P
P
P
D
D
D
2
1
0
P
3
3
3
P
P
P
D
D
D
1
2
3
8
8
8
8
7
P
P
P
D
D
D
1
0
3
4
4
5
P
P
P
D
D
D
1
2
0
7
P
P
D
H
1
7
P
D
0
6
6
P
P
D
D
3
2
6
P
P
D
H
1
D
6
P
N
G
0
5
P
D
3
5
5
P
P
H
D
2
4
5
7
7
6
D
2
3
4
5
6
7
8
9
10
11