168-pin Low Profile SDRAM DIMMs
32MB, 64MB, 128MB, 256MB, 512MB
Data Sheet
128MB DIMM Functional Block Diagram – SM12808ALDT
S0#
Clock Wiring
CK0
CK1
CK2
CK3
4 SDRAM+3.3 pf
Termination
4 SDRAM+3.3 pf
Termination
DQMB0
DQ(7:0)
DQMB4
DQ(39:32)
U0
U1
U4
U5
10
CK0,2
SDRAMs
DQMB1
DQ(15:8)
DQMB5
DQ(47:40)
Clock Termination
10
CK1,3
10 pf
S2#
DQMB2
DQMB6
DQ(55:48)
U2
U3
U6
U7
SCL
SA0-2
SDA
DQ(23:16)
Serial PD
WP
47K
DQMB3
DQ(31:24)
DQMB7
DQ(63:56)
BA0
BA1
BA0 SDRAM U0-7
BA1 SDRAM U0-7
A0-A11 SDRAM U0-7
Vdd SDRAM U0-7
Vss SDRAM U0-7
A0-A11
Vdd
Vss
RAS#
CAS#
WE#
RAS# SDRAM U0-7
CAS# SDRAM U0-7
WE# SDRAM U0-7
CKE SDRAM U0-7
CKE0
Note:
All DQ resistor values are 10 ohms.
All CK resistor values are 10 ohms.
U0-U7 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.
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Revision 1.1