168-pin Low Profile SDRAM DIMMs
32MB, 64MB, 128MB, 256MB, 512MB
Data Sheet
128MB ECC DIMM Functional Block Diagram – SM12809ALDT
S0#
Clock Wiring
CK0
CK1
CK2
CK3
5 SDRAM
DQMB0
DQ(7:0)
DQMB4
DQ(39:32)
Termination
4 SDRAM+3.3 pf
Termination
U0
U1
U2
U5
U6
10
CK0,2
SDRAMs
DQMB1
DQMB5
DQ(47:40)
DQ(15:8)
Clock Termination
10
CK1,3
10 pf
CB(7:0)
SCL
SA0-2
SDA
Serial PD
WP
47K
S2#
DQMB2
DQMB6
DQ(55:48)
U3
U4
U7
U8
DQ(23:16)
BA0
BA1
BA0 SDRAM U0-8
BA1 SDRAM U0-8
A0-A11 SDRAM U0-8
Vdd SDRAM U0-8
Vss SDRAM U0-8
A0-A11
Vdd
DQMB3
DQ(31:24)
DQMB7
DQ(63:56)
Vss
RAS#
CAS#
WE#
RAS# SDRAM U0-8
CAS# SDRAM U0-8
WE# SDRAM U0-8
CKE SDRAM U0-8
CKE0
Note:
All DQ resistor values are 10 ohms.
All CK resistor values are 10 ohms.
U0-U8 are 16Mx8 PC133 SDRAM Devices.
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: (719) 488-9095; http://www.edram.com
2001 Enhanced Memory Systems. All rights reserved.
The information contained herein is subject to change without notice.
Revision 1.1
Page 7 of 20
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
