Preliminary Data Sheet
168-pin Low Profile ESDRAM DIMMs
32MB, 64MB, 128MB
32MB DIMM Functional Block Diagram – SM4M64ALDT
S0#
Clock Wiring
DQMB0
DQMB1
DQ(15:0)
10
CK0,2
DQMB4
DQMB5
DQ(47:32)
CK1,3
10 pf
S2#
U2
Clock Termination
10
SDRAMs
U0
CK0
CK1
CK2
CK3
2 SDRAM+15 pf
Termination
2 SDRAM+15 pf
Termination
DQMB2
DQMB3
DQ(31:16)
U1
SCL
Serial PD
SA0-2
WP
47K
DQMB6
DQMB7
DQ(63:48)
U3
BA0
BA1
A0-A11
Vdd
Vss
BA0 SDRAM U0-3
BA1 SDRAM U0-3
A0-A11 SDRAM U0-3
Vdd SDRAM U0-3
Vss SDRAM U0-3
SDA
RAS#
CAS#
WE#
CKE0
RAS# SDRAM U0-3
CAS# SDRAM U0-3
WE# SDRAM U0-3
CKE0 SDRAM U0-3
Note:
All DQ resistor values are 10 ohms.
All CK resistor values are 10 ohms.
U0-U3 are SM2604T.
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 1.0
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
