CAS2/150MHz HSDRAM
64MB, 128MB DIMM
Preliminary Data Sheet
64MB DIMM Functional Block Diagram – SM6408DT-6.6
S0#
Clock Wiring
4 SDRAM+3.3 pf
Termination
4 SDRAM+3.3 pf
Termination
CK0
CK1
CK2
CK3
DQMB0
DQMB1
DQMB4
DQMB5
U0
U1
U4
DQ(7:0)
DQ(39:32)
DQ(47:40)
10
CK0,2
SDRAMs
U5
DQ(15:8)
Clock Termination
10
CK1,3
10 pf
S2#
DQMB2
DQMB6
DQMB7
SDA
WP
SCL
U2
U3
U6
Serial PD
DQ(23:16)
DQ(55:48)
DQ(63:56)
SA0-2
47K
BA0
BA0 SDRAM U0-7
BA1 SDRAM U0-7
DQMB3
BA1
A0-A11
Vdd
U7
DQ(31:24)
A0-A11 SDRAM U0-7
Vdd SDRAM U0-7
Vss
Vss SDRAM U0-7
RAS#
RAS# SDRAM U0-7
CAS# SDRAM U0-7
WE# SDRAM U0-7
CKE0 SDRAM U0-7
CAS#
WE#
CKE0
Note: All DQ resistor values are 10 ohms
All CK resistor values are 10 ohms
U0-U7 are SM3603T-6.6
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: (719) 488-9095; http://www.edram.com
2000 Enhanced Memory Systems. All rights reserved.
The information contained herein is subject to change without notice.
Revision 1.0
Page 3 of 12
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
