Kentron Technologies, Inc.
155 West Street
Wilmington, MA 01887
Phone: (978) 988-9100
Fax (978) 988-5550
www.kentrontech.com
64M X 72 REGISTERED DDR DIMM
SDRAM DDR MODULE
512 MByte (64M x 72) DDR SDRAM
Registered 184 Pin DIMM Preliminary
General Description:
This memory module is a high performance 512 Megabyte Registered synchronous dynamic
RAM module organized as 64M x 72 in a 184 pin Dual In-Line Memory Module (DIMM)
package. The module utilizes eighteen (18) 32Mx8 DDR SDRAM devices in a TSOP II 400 mil
package. A 256 Byte Serial EEPROM contains the module configuration information. The
EEPROM can be configured to Jedec specifications.
These modules offer substantial advances in DRAM operating performance, including the ability
to synchronously burst data at a high rate with automatic column-address generation, interleave
between internal banks in order to hide precharge time, and the capability to randomly change
column address on each clock cycle during burst.
Features:
High density: 512 MB (64M x 72) in two Banks
Cycle time: 7.5ns (133 MHz)
10ns (100 MHz)
Data Rate: 266Mbit/sec/pin (133 MHz)
200Mbit/sec/pin (100 MHz)
CAS Latency: 2 (100MHz)
2, 2.5 (133MHz)
JEDEC Standard 184 Pin Registered SDRAM DDR DIMM
PC1600/2100 Compliant
Single power supply of 2.5V 10%
Serial Presence Detect
SSTL2 Compatible I/O and Clock
SSTL2 Registered Control & Address Lines
On-board Differential PLL Clock Driver
Refresh Rate 7.8uSec
Auto Precharge and Auto Refresh Modes handled by SDRAM Devices
Programmable Burst Type, Burst Length and CAS Latency of SDRAM devices
Internal Pipeline Operation
Fully Synchronous all signals registered on positive edge of system clock
Data provided during Reads and Writes at twice the clock frequency
Package Height: 1.20 inches
Kentron Technologies, Inc. (978) 988-9100 Page 2
Rev. 10/01
64M X 72 REGISTERED DDR DIMM
Operating Features:
The SDRAM DDR DIMM utilizes a clock input for the synchronization. Each operation of the
SDRAM is determined by commands and all operations are referenced to a positive clock edge.
CAS Latency defines the delay from when a Read Command is registered on a rising clock
edge to when the data from the Read Command becomes available at the outputs. The CAS
latency is expressed in terms of clock cycles. This specific DIMM supports 2.5 and 2 clock
cycles.
The burst mode is a very high-speed access mode utilizing an internal column address
generator. Once a column address for the first access is set, following addresses are
automatically generated by the internal column address counter.
All control and address signals are registered on-board and hence delayed by one cycle in
arriving at the SDRAMs. The clock signal is distributed to all SDRAMs via a zero delay PLL
driver. Note that the PLL must be given enough clock cycles to stabilize before any operation
can be given (minimum stabilization time equal to 1 ms).
Absolute Maximum Ratings*:
Item
Symbol
Rating
Unit
V
DD
Supply voltage Relative to V
SS
V
DD
-1V to +3.6V
V
V
DDQ
Supply voltage Relative to V
SS
V
DDQ
-1V to +3.6V
V
V
REF
and Inputs Relative to V
SS
V
REF,
V
IN
-1V to +3.6V
V
I/O Voltage Relative to V
SS
V
I/O
-0.5V to V
DD
+0.5V
V
Operating temperature
T
opr
0 to +70
C
Storage temperature
T
stg
-55 to +150
C
Short circuit output current
I
out
50
mA
* Permanent device damage may occur if absolute maximum ratings are exceeded. Functional operation
should be restricted to the conditions as detailed in the sections of this data sheet. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Kentron Technologies, Inc. (978) 988-9100 Page 3
Rev. 10/01
64M X 72 REGISTERED DDR DIMM
Recommended Operating Conditions:
(Voltage referenced to V
SS
=0V ,T
A
= 0 to 70 C)
Item
Symbol
Min.
Typ.
Max.
Unit
Supply voltage
V
DD
2.3
2.5
2.7
V
I/O Supply voltage
V
DDQ
2.3
2.5
2.7
V
I/O Reference Voltage
V
REF
0.49x V
DD
1.25
0.51x V
DD
V
I/O Termination Voltage
V
TT
V
REF
-0.04
V
REF
V
REF
+0.04
V
Input high Voltage
V
IH
V
REF
+0.18
-
V
DD
+0.3
V
Input low Voltage
V
IL
-0.3
-
V
REF
-0.18
V
Clock Input Voltage
V
IN
-0.3
-
V
DDQ
+0.3
V
Clock Differential Voltage
V
ID
0.36
-
V
DDQ
+0.6
V
Clock Crossing Point Voltage
V
IX
1.15
-
1.35
V
Input and Output Leakage
I
I ,
I
OZ
-5
-
5
uA
Output High and Low Currents
I
OH ,
I
OL
-16.8 , +16.8
-
-
mA
Capacitance:
(TA=25C, Vcc=2.5V0.2V)
Parameter
Symbol
Max.
Unit
Input capacitance (CK, CK\)
C
I1
3
PF
Input/Output capacitance (DQs, DQSs, DMs,CBs)
C
IO
7
PF
Input capacitance (All other input-only pins)
C
I2
4
PF
DIMM Pinout:
No.
Designation
No.
Designation
No.
Designation
No.
Designation
No.
Designation
1
VREF
43
A1
85
VDD
127
DQ29
169
DM6/DQS15
2
DQ0
44
CB0
86
DQS7
128
VDDQ
170
DQ54
3
VSS
45
CB1
87
DQ58
129
DM3/DQS12
171
DQ55
4
DQ1
46
VDD
88
DQ59
130
A3
172
VDDQ
5
DQS0
47
DQS8
89
VSS
131
DQ30
173
NC
6
DQ2
48
A0
90
NC
132
VSS
174
DQ60
7
VDD
49
CB2
91
SDA
133
DQ31
175
DQ61
8
DQ3
50
VSS
92
SCL
134
CB4
176
VSS
9
NC
51
CB3
93
VSS
135
CB5
177
DM7/DQS16
10
RESET/
52
BA1
94
DQ4
136
VDDQ
178
DQ62
11
VSS
53
DQ32
95
DQ5
137
CK0
179
DQ63
12
DQ8
54
VDDQ
96
VDDQ
138
CK0
180
VDDQ
13
DQ9
55
DQ33
97
DM0/DQS9
139
VSS
181
SA0
14
DQS1
56
DQS4
98
DQ6
140
DM8/DQS17
182
SA1
15
VDDQ
57
DQ34
99
DQ7
141
A10
183
SA2
16
DU (CK1)
58
VSS
100
VSS
142
CB6
184
VDDSPD
17
DU (CK1)/
59
BA0
101
NC
143
VDDQ
18
VSS
60
DQ35
102
NC
144
CB7
19
DQ10
61
DQ40
103
A13
145
VSS
20
DQ11
62
VDDQ
104
VDDQ
146
DQ36
21
CCKE0
63
WE/
105
DQ12
147
DQ37
22
VDDQ
64
DQ41
106
DQ13
148
VDD
23
DQ16
65
CAS/
107
DM1/DQS10
149
DM4/DQS13
24
DQ17
66
VSS
108
VDD
150
DQ38
25
DQS2
67
DQS5
109
DQ14
151
DQ39
No.
Designation
No.
Designation
No.
Designation
No.
Designation
No.
Designation
Kentron Technologies, Inc. (978) 988-9100 Page 4
Rev. 10/01
64M X 72 REGISTERED DDR DIMM
26
VSS
68
DQ42
110
DQ15
152
VSS
27
A9
69
DQ43
111
CKE1
153
DQ44
28
DQ18
70
VDD
112
VDDQ
154
RAS/
29
A7
71
NC, S2/
113
BA2
155
DQ45
30
VDDQ
72
DQ48
114
DQ20
156
VDDQ
31
DQ19
73
DQ49
115
A12
157
S0/
32
A5
74
VSS
116
VSS
158
S1/
33
DQ24
75
DU (CK2)/
117
DQ21
159
DM5/DQS14
34
VSS
76
DU (CK2)
118
A11
160
VSS
35
DQ25
77
VDDQ
119
DM2/DQS11
161
DQ46
36
DQS3
78
DQS6
120
VDD
162
DQ47
37
A4
79
DQ50
121
DQ22
163
NC,S3/
38
VDD
80
DQ51
122
A8
164
VDDQ
39
DQ26
81
VSS
123
DQ23
165
DQ52
40
DQ27
82
VDDID
124
VSS
166
DQ53
41
A2
83
DQ56
125
A6
167
NC/FETEN
42
VSS
84
DQ57
126
DQ28
168
VDD
DC Characteristics:
(V
DD,
V
DDQ
= 2.5V0.2V, V
SS
=0V, T
A
=0 to + 70C)
Parameter
1
Symbol
133MHz
Max.
100MHz
Max.
Unit
Operating current
(No Burst, T
CK
=min. T
RC
=min.)
I
CC1
TBD
TBD
mA
Precharge Standby Current
(CKE=V
IL
, T
CK
= min. Bank idle)
(CKE=V
IH
, T
CK
= min. Bank idle)
I
CC2
90
900
90
900
mA
Active Standby Current
(CKE=V
IL
, T
CK
= min. )
(CKE=V
IH
, T
CK
= min. )
I
CC3
126
900
126
720
mA
Burst Mode Current (t
CK
=min.)
I
CC4
TBD
TBD
mA
Refresh Current (per DIMM)
(t
CK
=min., t
RFC
=min., t
RRD
=min., Auto Refresh)
I
CC5
TBD
TBD
mA
Self Refresh Current (CKE=V
IL
)
I
CC7
36
54
mA
Kentron Technologies, Inc. (978) 988-9100 Page 5
Rev. 10/01
64M X 72 REGISTERED DDR DIMM
AC Electrical Characteristics:
(TA=0C to +70C, V
CC
=2.5V0.2V, V
SS
=0V)
Parameter
Symbol 133MHz
Min.
133MHz
Max.
100MHz
Min.
100MHz
Max.
Unit
Row to row active delay
t
RRD
15
-
20
-
ns
RAS to CAS delay
(CL=2.5)
(CL=2)
t
RCD
20
15
-
-
-
20
-
-
ns
Row precharge time
(CL=2.5)
(CL=2)
t
RP
20
15
-
-
-
20
-
-
ns
Row active time
t
RAS
45
120K
50
120K
ns
Row cycle time
(CL=2.5)
(CL=2)
t
RC
65
60
-
-
-
70
-
-
ns
Access Window of DQS from CLK,
CLK\
t
DQSCK
-0.75
+0.75
-0.8
+0.8
ns
DQS Input High Pulse Width
t
DQSH
0.35
-
0.35
-
clk
DQS Input Low Pulse Width
t
DQSL
0.35
-
0.35
-
clk
Refresh to Refresh command period
t
REFC
-
140.6
-
140
clk
Access Window of DQs from CLK
t
AC
-0.75
+0.75
-0.8
+0.8
ns
Clock Cycle Time
t
CK
7.5
10
ns
Auto Refresh command period
(CL=2.5)
(CL=2)
t
RFC
75
67
-
-
-
80
-
-
ns
Clock High Pulse Width
t
CH
0.45
0.55
0.45
0.55
clk
Clock Low Pulse Width
t
CL
0.45
0.55
0.45
0.55
clk
Address Input Setup Time
t
IS
1
-
1.1
-
ns
Address Input Hold Time
t
IH
1
-
1.1
-
ns
Input Data Hold Time
t
DH
0.5
-
0.6
-
ns
Input Data Setup Time
t
DS
0.5
-
0.6
-
ns
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