168-pin Enhanced SDRAM DIMM
8MB, 16MB, 32MB DIMM
Preliminary Data Sheet
1Mx64 (8MB) DIMM Functional Block Diagram – SM1M64DT
S0#
Clock Wiring
4 ESDRAM+3.3 pf
Termination
4 ESDRAM+3.3 pf
Termination
CK0
CK1
CK2
CK3
DQMB0
DQMB1
DQMB4
DQMB5
DQ(7:0)
DQ(39:32)
DQ(47:40)
10
U1
U3
CK0,2
ESDRAM
DQ(15:8)
Clock Termination
10
CK
10 pf
S2#
DQMB2
DQMB6
DQMB7
SDA
WP
SCL
Serial PD
DQ(23:16)
DQ(55:48)
DQ(63:56)
SA0-2
47K
U2
U4
DQMB3
BA0
BA0 ESDRAM U1-4
DQ(31:24)
A0-A10
Vdd
A0-A10 ESDRAM U1-4
Vdd ESDRAM U1-4
Vss
Vss ESDRAM U1-4
RAS#
RAS# ESDRAM U1-4
CAS# ESDRAM U1-4
WE# ESDRAM U1-4
CKE0 ESDRAM U1-4
CAS#
WE#
CKE0
Note: All DQ resistor values are 10 ohms
All CK resistor values are 10 ohms
U1-U4 are SM2404T 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.
Revision 3.1
Page 3 of 13
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
