PC100/PC133 ECC REGISTERED DIMM
VR8ARxx7238xTx
MODULE CONFIGURATIONS
VMS Part Number
VR8AR167238CTC
VR8AR167238CTD
VR8AR167238CTE
VR8AR327238CTC
VR8AR327238CTD
VR8AR327238CTE
VR8AR327238DTC
VR8AR327238DTD
VR8AR327238DTE
VR8AR647238 DTC
VR8AR647238DTD
VR8AR647238DTE
VR8AR647238ETD
VR8AR647238ETE
VR8AR287238ETD
VR8AR287238ETE
512MB
1GB
64Mx72
128Mx72
64M x 8 (9)
64M x 8 (18)
TSOP
TSOP
1
2
512MB
64Mx72
32M x 8 (18)
TSOP
2
256MB
32Mx72
32M x 8 (9)
TSOP
1
256MB
32Mx72
16M x 8 (18)
TSOP
2
128MB
16Mx72
16M x 8 (9)
TSOP
1
Capacity
Module
Configuration
Device
Configuration
Device
Package
Module
Ranks
Performance
PC100
PC133
PC133
PC100
PC133
PC133
PC100
PC133
PC133
PC100
PC133
PC133
PC133
PC133
PC133
PC133
CAS Latency
CL3 (3-3-3)
CL2 (2-2-2)
CL3 (3-3-3)
CL3 (3-3-3)
CL2 (2-2-2)
CL3 (3-3-3)
CL3 (3-3-3)
CL2 (2-2-2)
CL3 (3-3-3)
CL3 (3-3-3)
CL2 (2-2-2)
CL3 (3-3-3)
CL2 (2-2-2)
CL3 (3-3-3)
CL2 (2-2-2)
CL3 (3-3-3)
Features
•
•
•
•
•
•
•
•
Single 3.3V ± 0.3V Power Supply.
Burst Length (1, 2, 4, 8 & full page)
Data Scramble (Sequential & Interleave)
All inputs are sampled at the positive going edge of the system clock.
Auto & self refresh capability. (8k/64ms refresh period)
Serial Presence Detect with EEPROM.
Optional PLL output disable on power-up. PLL clocks are not applied to SDRAM until power is valid for 300ms.
RoHS Compliant* (see last page)
Viking Modular Solutions♦20091 Ellipse♦Foothill Ranch, CA 92610
Tel (800) 338-2361 Fax (949) 666-8159♦Website: http://www.vikingmodular.com
This Data Sheet is subject to change without notice.
Doc. # PS8ARxx7238DTx-LF Revision A1 Created By: Ken Ishiguro
Page 1 of 12
PC100/PC133 ECC REGISTERED DIMM
VR8ARxx7238xTx
PIN CONFIGURATIONS
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
GND
DQ0
DQ1
DQ2
DQ3
VCC
DQ4
DQ5
DQ6
DQ7
DQ8
GND
DQ9
DQ10
DQ11
DQ12
DQ13
VCC
DQ14
DQ15
CB0
Pin
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
CB1
GND
NC
NC
VCC
#WE
DQM0
DQM1
#CS0
NC
GND
A0
A2
A4
A6
A8
A10/AP
BA1
VCC
VCC
CLK0
Pin
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
GND
NC
#CS2
DQM2
DQM3
NC
VCC
NC
NC
CB2
CB3
GND
DQ16
DQ17
DQ18
DQ19
VCC
DQ20
NC
*VREF
CKE1
Pin
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
GND
DQ21
DQ22
DQ23
GND
DQ24
DQ25
DQ26
DQ27
VCC
DQ28
DQ29
DQ30
DQ31
GND
*CLK2
NC
NC
SDA
SCL
VCC
Pin
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
GND
DQ32
DQ33
DQ34
DQ35
VCC
DQ36
DQ37
DQ38
DQ39
DQ40
GND
DQ41
DQ42
DQ43
DQ44
DQ45
VCC
DQ46
DQ47
CB4
Pin
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
CB5
GND
NC
NC
VCC
#CAS
DQM4
DQM5
**#CS1
#RAS
GND
A1
A3
A5
A7
A9
BA0
A11
VCC
*CLK1
1
Pin
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
GND
CKE0
**#CS3
DQM6
DQM7
NC
VCC
NC
NC
CB6
CB7
GND
DQ48
DQ49
DQ50
DQ51
VCC
DQ52
NC
*VREF
REGE
Pin
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
GND
DQ53
DQ54
DQ55
GND
DQ56
DQ57
DQ58
DQ59
VCC
DQ60
DQ61
DQ62
DQ63
GND
*CLK3
NC
SA0
SA1
SA2
VCC
A12
* Pins are not used in this module
** Pins are used for 2 rank modules. (Connected but not functional in 1 rank modules.)
1
Connected but not functional on modules using 128Mb SDRAM devices ( CTx PN suffix ).
Viking Modular Solutions♦20091 Ellipse♦Foothill Ranch, CA 92610
Tel (800) 338-2361 Fax (949) 666-8159♦Website: http://www.vikingmodular.com
This Data Sheet is subject to change without notice.
Doc. # PS8ARxx7238DTx-LF Revision A1 Created By: Ken Ishiguro
Page 2 of 12
PC100/PC133 ECC REGISTERED DIMM
VR8ARxx7238xTx
PIN FUNCTION DESCRIPTION
Pin
Name
Input Function
Row/column addresses are multiplexed on the same pins. PN suffix-
CTx (128Mb SDRAM): Row address: A0~A11, Column address: A0~A9.
DTx (256Mb SDRAM): Row address: A0~A12, Column address: A0~A9.
ETx (512Mb SDRAM): Row address: A0~A12, Column address: A0~A9,
A11
Selects which bank to apply Active, Read, Write, or Precharge command.
Active on the positive-going edge to sample all inputs.
Masks system clock to freeze operation from the next clock cycle. Provides
low power operating modes. To exit low power modes, CKE should be
enabled 1CLK+tss prior to valid command. Input buffers are disabled for low
standby power. CKE1 is used on dual rank modules only.
Disables or enables device operation by masking or enabling all inputs
except CLK, CKE and DQM. #CS1 and #CS3 are used on dual rank
modules only.
Latches row addresses on the positive going edge of the CLK with #RAS
low. Enables row access & precharge.
Latches column addresses on the positive going edge of the CLK with #CAS
low. Enables column access.
Enables write operation and row precharge. Latches data in starting from
#CAS, #WE active.
The module register operates in transparent mode when REGE is low.
When REGE is high or floating, the module operates in registered mode. In
registered mode, the Address and control inputs are latched if CLK is held at
a high or low logic level. The inputs are stored in the latch/flip-flop on the
rising edge of CLK. REGE is tied to VCC through 10k pullup.
Masks data inputs during a Write cycle if DQM is high (Byte masking).
During a Read cycle, provides Output Enable. Data output buffers are Hi-Z if
DQM is high (2-clock latency).
Data inputs/outputs are multiplexed on the same pins.
Check bits for ECC.
SPD Data Line
SPD Clock
Assigns an address to the SPD device. Hardwire “strapped” on the system
motherboard based on the physical DIMM socket.
Pin is not connected.
Power and ground for the input buffers and the core logic.
A0 ~ AN
Address
BA0, BA1
CLK0
CKE0 ~ CKE1
Bank select address
System clock
Clock enable
#CS0 ~ #CS3
#RAS
#CAS
#WE
Chip select
Row address strobe
Column address strobe
Write enable
REGE
Register enable
DQM0 ~ DQM7
DQ0 ~ DQ63
CB0 ~ CB7
SDA
SCL
SA0 ~ SA2
NC
VCC/GND
Data input / output
mask
Data input/output
Check Bit
Serial Data I/O
Serial Clock
Address in EEPROM
No Connection
Power supply/ground
Viking Modular Solutions♦20091 Ellipse♦Foothill Ranch, CA 92610
Tel (800) 338-2361 Fax (949) 666-8159♦Website: http://www.vikingmodular.com
This Data Sheet is subject to change without notice.
Doc. # PS8ARxx7238DTx-LF Revision A1 Created By: Ken Ishiguro
Page 3 of 12
PC100/PC133 ECC REGISTERED DIMM
VR8ARxx7238xTx
MECHANICAL OUTLINE SINGLE RANK
All dimensions are in inches with a tolerance of +/- 0.005 unless otherwise specified.
U2 1
C1
0 0 0 10 86 A
C19
c 2 0 0 5 Vi k i n g - I n t e r W r k s
o
Viking Modular Solutions♦20091 Ellipse♦Foothill Ranch, CA 92610
Tel (800) 338-2361 Fax (949) 666-8159♦Website: http://www.vikingmodular.com
This Data Sheet is subject to change without notice.
Doc. # PS8ARxx7238DTx-LF Revision A1 Created By: Ken Ishiguro
Page 4 of 12
PC100/PC133 ECC REGISTERED DIMM
VR8ARxx7238xTx
MECHANICAL OUTLINE DUAL RANK
All dimensions are in inches with a tolerance of +/- 0.005 unless otherwise specified.
U2 1
C1
0 0 0 10 86 A
C19
c 2 0 0 5 Vi k i n g - I n t e r W r k s
o
Viking Modular Solutions♦20091 Ellipse♦Foothill Ranch, CA 92610
Tel (800) 338-2361 Fax (949) 666-8159♦Website: http://www.vikingmodular.com
This Data Sheet is subject to change without notice.
Doc. # PS8ARxx7238DTx-LF Revision A1 Created By: Ken Ishiguro
Page 5 of 12
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