Integrated
Circuit
Systems, Inc.
ICSSSTUB32S868D
Advance Information
08/14/06
Recommended Application:
• DDR2 Memory Modules
• Provides complete DDR DIMM solution with
ICS97U877
• Ideal for DDR2 400, 533 and 667
Product Features:
• 28-bit 1:2 registered buffer with parity check
functionality
• Supports SSTL_18 JEDEC specification on data
inputs and outputs
• Supports LVCMOS switching levels on CSGEN and
RESET# inputs
• Low voltage operation
V
DD
= 1.7V to 1.9V
• Available in 176 BGA package
• Green packages available
28-Bit Configurable Registered Buffer for DDR2
Functionality Truth Table
Pin Configuration
176 Ball BGA
(Top View)
Inputs Outputs
RST# DCS0# DCS1# CSGEN CK CK#
Dn,
DODTn,
DCKEn
Qn QCS0# QCS1#
QODT,
QCKE
H
LL X
LL
LL
L
H
LL X
HH
LL
H
H L L X L or H L or H X
Q
0
Q
0
Q
0
Q
0
H
LH X
LL
LH
L
H
LH X
HH
LH
H
H L H X L or H L or H X
Q
0
Q
0
Q
0
Q
0
H
HL X
LL
HL
L
H
HL X
HH
HL
H
H H L X L or H L or H X
Q
0
Q
0
Q
0
Q
0
H
HH L
LLHHL
H
HH L
HHHHH
H H H L L or H L or H X
Q
0
Q
0
Q
0
Q
0
H
HH H
L
Q
0
HHL
H
HH H
H
Q
0
HHH
H H H H L or H L or H X
Q
0
Q
0
Q
0
Q
0
L
X or
floating floating floating floating floating floating
X or X or X or X or X or
LLLL
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
A
B
17823456
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
V
W
Y
AA
AB
ADVANCE INFORMATION documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.
ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners.
