168-pin Low profile ESDRAM DIMMs
32MB, 64MB, 128MB
64MB DIMM Functional Block Diagram – SM8M64ALDT
Preliminary Data Sheet
S0#
Clock Wiring
DQMB0
U0
DQ(7:0)
DQ(39:32)
DQMB4
U4
CK0
CK1
CK2
CK3
4 SDRAM+3.3 pf
Termination
4 SDRAM+3.3 pf
Termination
10
CK0,2
DQMB1
U1
DQ(15:8)
DQ(47:40)
Clock Termination
10
CK1,3
10 pf
S2#
DQMB5
U5
SDRAMs
DQMB2
U2
DQ(23:16)
DQMB6
U6
DQ(55:48)
SA0-2
SCL
Serial PD
WP
47K
SDA
DQMB3
U3
DQ(31:24)
DQMB7
U7
DQ(63:56)
BA0
BA1
A0-A11
Vdd
Vss
BA0 SDRAM U0-7
BA1 SDRAM U0-7
A0-A11 SDRAM U0-7
Vdd SDRAM U0-7
Vss SDRAM U0-7
RAS#
CAS#
WE#
CKE0
RAS# SDRAM U0-7
CAS# SDRAM U0-7
WE# SDRAM U0-7
CKE SDRAM U0-7
Note:
All DQ resistor values are 10 ohms.
All CK resistor values are 10 ohms.
U0-U7 are SM2603T.
Enhanced Memory Systems Inc., 1850 Ramtron Dr., Colo Spgs, CO 80921
PHONE: (800) 545-DRAM; FAX: (719) 488-9095;
http://www.edram.com
Page 4 of 15
2001 Enhanced Memory Systems. All rights reserved.
The information contained herein is subject to change without notice.
Revision 1.0
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
