168-pin Enhanced SDRAM DIMM
8MB, 16MB, 32MB DIMM
Preliminary Data Sheet
2Mx64 (16MB) DIMM Functional Block Diagram – SM2M64DT
S0#
Clock Wiring
4 ESDRAM+3.3 pf
Termination
4 ESDRAM+3.3 pf
Termination
CK0
CK1
CK2
CK3
DQMB0
DQMB1
DQMB4
DQMB5
U1
U3
U2
DQ(7:0)
DQ(39:32)
DQ(47:40)
10
CK0,2
ESDRAM
Clock Termination
U4
10
DQ(15:8)
CK
10 pf
S2#
SDA
WP
SCL
DQMB2
DQMB6
DQMB7
Serial PD
U7
U9
SA0-2
U6
DQ(23:16)
DQ(55:48)
DQ(63:56)
47K
BA0
BA0 ESDRAM U1-9
A0-A10 ESDRAM U1-9
Vdd ESDRAM U1-9
DQMB3
U8
A0-A10
Vdd
DQ(31:24)
Vss
Vss ESDRAM U1-9
RAS#
RAS# ESDRAM U1-9
CAS# ESDRAM U1-9
WE# ESDRAM U1-9
CKE0 ESDRAM U1-9
CAS#
WE#
CKE0
Note: All DQ resistor values are 10 ohms
All CK resistor values are 10 ohms
U1-U9 are SM2403T ESDRAM
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: (719) 488-9095; http://www.edram.com
1999 Enhanced Memory Systems. All rights reserved.
The information contained herein is subject to change without notice.
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Revision 3.1