Preliminary Data Sheet
PC-133 HSDRAM
256MB, 512MB DIMM
512MB DIMM Functional Block Diagram – SM51208BDT-7.5
S0#
S1#
DQMB0
DQ(7:0)
U1
U9
DQMB4
DQ(39:32)
Clock Wiring
U5
U13
CK0
CK1
CK2
CK3
4 SDRAM+3.3 pf
4 SDRAM+3.3 pf
4 SDRAM+3.3 pf
4 SDRAM+3.3 pf
DQMB1
DQ(15:8)
U2
U10
DQMB5
DQ(47:40)
U6
U14
10
CK0-3
S2#
S3#
DQMB2
DQ(23:16)
U3
U11
DQMB6
DQ(55:48)
SDRAMs
U7
U15
SCL
SA0-2
SDA
Serial PD
WP
47K
DQMB3
DQ(31:24)
U4
U12
DQMB7
DQ(63:56)
U8
U16
BA0
BA1
A0-A12
Vdd
Vss
BA0 SDRAM U1-16
BA1 SDRAM U1-16
A0-A12 SDRAM U1-16
Vdd SDRAM U1-16
Vss SDRAM U1-16
RAS#
CAS#
WE#
CKE0
Vdd
10K
CKE1
RAS# SDRAM U1-16
CAS# SDRAM U1-16
WE# SDRAM U1-16
CKE0 SDRAM U1-8
CKE1 SDRAM U9-16
Note: All DQ resistor values are 10 ohms
All CK resistor values are 10 ohms
U1-U16 are SM3803T
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 1.0
Page 5 of 11
RAMTRON [ RAMTRON INTERNATIONAL CORPORATION ]
