ICSSSTU32864 Datasheet, PDF (1/11 Pages) Integrated Circuit Systems – 25-Bit Configurable Registered Buffer

Integrated
Circuit
Systems, Inc.
ICSSSTU32864
25-Bit Configurable Registered Buffer
Recommended Application:
• DDR2 Memory Modules
• Provides complete DDR DIMM logic solution with
ICS97U877
Product Features:
• 25-bit 1:1 or 14-bit 1:2 configurable registered buffer
• Supports SSTL_18 JEDEC specification on data
inputs and outputs
• Supports LVCMOS switching levels on CSR# and
RESET# inputs
• Low voltage operation
VDD = 1.7V to 1.9V
• Available in 96 BGA package
Truth Table
I nputs
Outp uts
RST# DCS# CSR# CK
Dn,
CK# DODT, Qn
DCK E
QCS#
QODT,
QCKE
H
L
L
L
L
L
L
H
L
L
H
H
L
H
H
L
L
L or H L or H
X
Q₀
Q₀
Q₀
H
L
H
L
L
L
L
H
L
H
H
H
L
H
H
L
H
L or H L or H
X
Q₀
Q₀
Q₀
H
H
L
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L or H L or H
X
Q₀
Q₀
Q₀
H
H
H
L
Q₀
H
L
H
H
H
H
Q₀
H
H
H
H
H
L or H L or H
X
Q₀
Q₀
Q₀
L
X or
X or
X or
X or
X or
Floating Floating Floating Floating Floating
L
L
L
0727C—04/15/04
Pin Configuration
123456
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
96 Ball BGA
(Top View)
Ball Assignments
A ^DCKE
B ^D2
C ^D3
D ^DODT
E ^D5
F ^D6
G ^NC
H ^CK
J ^CK#
K ^D8
L ^D9
M ^D10
N ^D11
P ^D12
R ^D13
T ^D14
1
NC
D15
D16
NC
D17
D18
RST#
DCS#
CSR#
D19
D20
D21
D22
D23
D24
D25
2
V _REF
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
V _REF
3
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
GND
V_DD
V_DD
4
QCKE NC
Q2
Q15
Q3
Q16
QODT NC
Q5
Q17
Q6
Q18
C1
C0
QCS# NC
ZOH ZOL
Q8
Q19
Q9
Q20
Q10
Q21
Q11
Q22
Q12
Q23
Q13
Q24
Q14
Q25
5
6
1:1 Register (C0 = 0, C1 = 0)