Download Transcend 256MB, DDR, DIMM, DDR,333MHz, CL2, JetRam

256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
Description
Placement
The JM334D643A-60 is a 32M x 64bits Double Data Rate
SDRAM high density for DDR333. The JM334D643A-60
consists of 8pcs CMOS 32Mx8 bits Double Data Rate
SDRAMs in 66 pin TSOP-II 400mil packages and a 2048
bits serial EEPROM on a 184-pin printed circuit board.
The JM334D643A-60 is a Dual In-Line Memory Module
and is intended for mounting into 184-pin edge connector
sockets.
A
Synchronous design allows precise cycle control with the
use of system clock. Data I/O transactions are possible
on both edges of DQS. Range of operation frequencies,
programmable latencies allow the same device to be
useful for a variety of high bandwidth, high performance
B
memory system applications.
Features
•
Power supply: VDD: 2.5V ± 0.2V, VDDQ: 2.5V ±
C
0.2V
•
Max clock Freq: 166MHZ.
•
Double-data-rate architecture; two data transfers per
D
I
clock cycle
•
H
Differential clock inputs(CK and /CK)
•
Burst Mode Operation.
•
Auto and Self Refresh.
•
•
Data I/O transactions on both edge of data strobe.
G
F
E
Edge aligned data output, center aligned data
input.
•
Serial Presence Detect (SPD) with serial EEPROM
•
SSTL-2 compatible inputs and outputs.
•
MRS cycle with address key programs.
PCB: 09-1395
CAS Latency (Access from column address) : 2.5
Burst Length (2,4,8 )
Data Sequence (Sequential & Interleave)
Transcend Information Inc.
1
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
Dimensions
Pin Identification
Symbol
Inches
Function
Side
Millimeters
A
133.35±0.20
5.250±0.008
B
72.39
2.850
C
6.35
0.250000
DQ0~DQ63
Data Input / Output.
D
2.20
0.0870
DQS0~DQS7
Data strobe input/output
E
31.75±0.20
1.250±0.00800
F
19.80
0.779
CK0, /CK0, CK1, /CK1
Clock Input.
CK2, /CK2
G
4.00
0.157
H
12.00
0.472
I
1.27±0.10
0.050±0.004
A0~A12, BA0, BA1 Address input
(Refer Placement)
CKE0
Clock Enable Input.
/CS0
Chip Select Input.
/RAS
Row Address Strobe
/CAS
Column Address Strobe
/WE
Write Enable
DM0~DM7
Data-in Mask
VDD
+2.5 Voltage power supply
VDDQ
+2.5 Voltage Power Supply for DQS
VREF
VDDSPD
Power Supply for Reference
+2.5 Voltage Serial EEPROM
Power Supply
SA0~SA2
Address in EEPROM
SCL
Serial PD Clock
SDA
Serial PD Add/Data input/output
VSS
Ground
NC
No Connection
(Refer Block Diagram And Pinouts)
Transcend Information Inc.
2
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
Pinouts:
Pin
No
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Pin
Name
VREF
DQ0
VSS
DQ1
DQS0
DQ2
VDD
DQ3
NC
NC
VSS
DQ8
DQ9
DQS1
VDDQ
CK1
/CK1
VSS
DQ10
DQ11
CKE0
VDDQ
DQ16
DQ17
DQS2
VSS
A9
DQ18
A7
VDDQ
DQ19
A5
DQ24
VSS
DQ25
DQS3
A4
VDD
DQ26
DQ27
A2
VSS
A1
NC
NC
VDD
Transcend Information Inc.
Pin
No
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
Pin
Name
NC
A0
NC
VSS
NC
BA1
DQ32
VDDQ
DQ33
DQS4
DQ34
VSS
BA0
DQ35
DQ40
VDDQ
/WE
DQ41
/CAS
VSS
DQS5
DQ42
DQ43
VDD
NC
DQ48
DQ49
VSS
/CK2
CK2
VDDQ
DQS6
DQ50
DQ51
VSS
NC
DQ56
DQ57
VDD
DQS7
DQ58
DQ59
VSS
NC
SDA
SCL
Pin
No
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
3
Pin
Name
VSS
DQ4
DQ5
VDDQ
DM0
DQ6
DQ7
VSS
NC
NC
NC
VDDQ
DQ12
DQ13
DM1
VDD
DQ14
DQ15
NC
VDDQ
NC
DQ20
A12
VSS
DQ21
A11
DM2
VDD
DQ22
A8
DQ23
VSS
A6
DQ28
DQ29
VDDQ
DM3
A3
DQ30
VSS
DQ31
NC
NC
VDDQ
CK0
/CK0
Pin
No
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
Pin
Name
VSS
NC
A10
NC
VDDQ
NC
VSS
DQ36
DQ37
VDD
DM4
DQ38
DQ39
VSS
DQ44
/RAS
DQ45
VDDQ
/CS0
NC
DM5
VSS
DQ46
DQ47
NC
VDDQ
DQ52
DQ53
NC
VDD
DM6
DQ54
DQ55
VDDQ
NC
DQ60
DQ61
VSS
DM7
DQ62
DQ63
VDDQ
SA0
SA1
SA2
VDDSPD
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
JM334D643A-60-- Block Diagram
/WE
/CS0
/WE
/CS
CKE0
CKE
32Mx8
DDR
SDRAM
/RAS
32Mx8
/RAS
/CAS
DDR
SDRAM
/CAS
/WE
/CS
CKE
DM1
DQS1
DM0
DQS0
32Mx8
DDR
SDRAM
/WE
/CS
CKE
DM2
DQS2
/RAS
32Mx8
/CAS
DDR
SDRAM
/WE
/CS
CKE
DM
DQS
CK,/CK
/CAS
A0~A12,
BA0,BA1
DQ0~DQ7
CK,/CK
/RAS
/CAS
A0~A12,
BA0,BA1
DQ0~DQ7
DM
DQS
CK,/CK
/RAS
A0~A12,
BA0,BA1
DQ0~DQ7
DM
DQS
A0~A12,
BA0,BA1
DQ0~DQ7
DM
DQS
CK,/CK
A0~A12,
BA0,BA1
DQ0~DQ63
DM3
DQS3
DM4
SCL
Serial EEPROM
SCL
SDA
A0
A1
/RAS
/CAS
/WE
/CS
CKE
CK,/CK
CK,/CK
32Mx8
DDR
SDRAM
DQS
CKE
A0~A12,
BA0,BA1
DQ0~DQ7
DM
/WE
32Mx8
DDR
SDRAM
/CS
DM6
DQS6
DM5
DQS5
DQS4
/RAS
/CAS
DQS
CKE
A0~A12,
BA0,BA1
DQ0~DQ7
DM
/WE
/CS
DQS
CKE
DM
/CS
32Mx8
DDR
SDRAM
/CAS
DM
/WE
/RAS
32Mx8
DDR
SDRAM
DQS
/RAS
/CAS
A0~A12,
BA0,BA1
DQ0~DQ7
CK,/CK
A0~A12,
BA0,BA1
DQ0~DQ7
CK,/CK
CK1,/CK1
CK0,/CK0
CK2,/CK2
DM7
DQS7
SDA
A2
SA0 SA1 SA2
This technical information is based on industry standard data and tests believed to be reliable. However, Transcend makes no warranties, either
expressed or implied, as to its accuracy and assume no liability in connection with the use of this product. Transcend reserves the right to make changes
in specifications at any time without prior notice.
Transcend Information Inc.
4
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Value
Unit
Voltage on any pin relative to Vss
VIN, VOUT
-0.5 ~ 3.6
V
Voltage on VDD supply to Vss
VDD, VDDQ
-1.0 ~ 3.6
V
Storage temperature
TSTG
-55~+150
°C
Power dissipation
PD
12
W
Short circuit current
IOS
50
mA
Mean time between failure
MTBF
50
Years
Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded.
Note:
Functional operation should be restricted to recommended operating condition.
Exposure to higher than recommended voltage for extended periods of time could affect device reliability.
DC OPERATING CONDITIONS
Recommended operating conditions (Voltage referenced to Vss = 0V, TA = 0 to 70°C)
Parameter
Symbol
Min
Max
Unit
Note
Supply voltage
VDD
2.3
2.7
V
I/O Supply voltage
VDDQ
2.3
2.7
V
I/O Reference voltage
VREF
VDDQ/2-50mV VDDQ/2+50mV
V
1
I/O Termination voltage
VTT
VREF-0.04
VREF+0.04
V
2
Input logic high voltage
VIH(DC)
VREF+0.15
VDDQ+0.3
V
4
Input logic low voltage
VIL(DC)
-0.3
VREF-0.15
V
4
Input Voltage Level, CK and /CK inputs
VIN(DC)
-0.3
VDDQ+0.3
V
Input Differential Voltage, CK and /CK inputs
VID(DC)
0.36
VDDQ+0.6
V
3
Input crossing point voltage, CK and /CK inputs VIX(DC)
1.15
1.35
V
5
Input leakage current
II
-2
2
uA
Output leakage current
IOZ
-5
5
uA
Output High Current (Normal strength driver)
IOH
-16.8
mA
VOUT= VTT + 0.84V
Output Low Current (Normal strength driver)
16.8
mA
IOL
VOUT= VTT – 0.84V
Output High Current(Half strength driver)
IOH
-9
mA
VOUT= VTT + 0.45V
Output High Current(Half strength driver)
IOL
9
mA
VOUT= VTT - 0.45V
Note: 1. Includes ± 25mV margin for DC offset on VREF, and a combined total of ± 50mV margin for all AC noise and DC
offset on VREF, bandwidth limited to 20MHz. The DRAM must accommodate DRAM current spikes on VREF and
internal DRAM noise coupled. TO VREF, both of which may result in VREF noise. VREF should be de-coupled
with an inductance of <=3nH.
2. VTT is not applied directly to the device. VTT is a system supply for signal termination resistors, is expected to be
set equal to VREF, and must track variations in the DC level of VREF
3. VID is the magnitude of the difference between the input level on CK and the input level on /CK.
4. These parameters should be tested at the pin on actual components and may be checked at either the pin or the
pad in simulation. The AC and DC input specifications are relative to a VREF envelop that has been bandwidth
limited to 200MHZ.
5. The value of VIX is expected to equal 0.5*VDDQ of the transmitting device and must track variations in the dc
level of the same.
Transcend Information Inc.
5
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
DC CHARACTERISTICS
(Recommended operating condition unless otherwise noted, TA = 0 to 70°C)
Parameter
Symbol
Max.
Unit
Operating current - One bank Active-Precharge;
tRC=tRCmin; tCK= tCK min
DQ, DM and DQS inputs changing twice per clock cycle;
Address and control inputs changing once per clock cycle
IDD0
920
mA
Operating current - One bank Active-Read-Precharge; Burst=2;
tRC=tRC min; CL=2.5; tCK=tCK min; VIN=VREF fro DQ,DQS and DM
IDD1
1120
mA
Percharge power-down standby current; All banks idle; power –
down mode; CKE = <VIL(max); tCK= tCK min
VIN = VREF for DQ, DQS and DM
IDD2P
24
mA
Precharge Floating standby current; CS# > =VIH(min);All banks idle;
CKE > = VIH(min); tCK=166Mhz for DDR333
Address and other control inputs changing once per clock cycle;
VIN = VREF for DQ, DQS and DM
IDD2F
240
mA
Active power - down standby current ; one bank active; power-down mode; CKE<=
VIL (max); tCK = tCK min;
VIN = VREF for DQ, DQS and DM
IDD3P
320
mA
Active standby current; CS# >= VIH(min); CKE>=VIH(min);
one bank active; active - precharge; tRC=tRASmax; tCK = tCK min;
DQ, DQS and DM inputs changing twice per clock cycle; address and other control
inputs changing once per clock cycle
IDD3N
480
mA
Operating current - burst read; Burst length = 2; reads; continuous burst; One
bank active; address and control inputs changing once per clock cycle; CL=2.5 at
tCK = tCK min; 50% of data changing at every burst; lout = 0 mA
IDD4R
1,480
mA
Operating current - burst write; Burst length = 2; writes; continuous burst; One
bank active address and control inputs changing once per clock cycle; CL=2.5 at
IDD4W
tCK = tCK min; DQ, DM and DQS inputs changing twice per clock cycle, 50% of
input data changing at every burst
1,400
mA
Auto refresh current; tRC = tRFC(min)
IDD5
1,560
mA
Self refresh current; CKE <= 0.2V;
IDD6
24
mA
Operating current - Four bank operation;
Four bank interleaving with BL=4
-Refer to the following page for detailed test condition
IDD7
2,800
mA
Note
Note: 1. These parameters depend on the cycle rate and these values are measured a cycle rate with the minimum
values of tCK and tRC
2. These parameters depend on the output loading. Specified values are obtained with the output open.
Transcend Information Inc.
6
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
AC OPERATING CONDITIONS
Parameter
Symbol
Min
Input High (Logic 1) Voltage, DQ, DQS and DM signals
VIH(AC)
VREF + 0.31
Input Low (Logic 0) Voltage, DQ, DQS and DM signals
VIL(AC)
Input Differential Voltage, CK and /CK inputs
VID(AC)
Input Crossing Point Voltage, CK and /CK inputs
VIX(AC)
Max
Unit
V
VREF - 0.31
V
0.7
VDDQ + 0.6
ns
0.5*VDDQ - 0.2
0.5*VDDQ + 0.2
Note: 1. VIH(max)=4.2V. The overshoot voltage duration is <=3ns at VDD.
2. VIL(min)=-1.5V. The undershoot voltage duration is <=3ns at VSS
3. VID is the magnitude of the difference between the input level on CK and the input on /CK
4. The Value of VIX is expected to equal 0.5*VDDQ of the transmitting device and must track variations in the DC
level of the same.
AC OPERATING TEST CONDITIONS (VDD=2.5, VDDQ=2.5, TA=0 to 70°C)
Parameter
Input reference voltage for Clock
Value
Unit
0.5*VDDQ
V
Input signal maximum peak swing
Input Levels (VIH/VIL)
1.5
V
VREF+0.31/VREF-0.31
V
VREF
V
Vtt
V
Input timing measurement reference level
Output timing measurement reference level
Output load condition
Note
See Load Circuit
VTT=0.5*VDDQ
RT=50ohm
Output
ZO=50ohm
VREF
=0.5*VDDQ
CLOAD=30pF
Output Load circuit
Input/Ouput CAPACITANCE (VDD = 2.5V, VDDQ = 2.5V,TA = 25°C, f = 1MHz)
Parameter
Input capacitance (A0~A12, BA0~BA1, /RAS, /CAS, /WE)
Input capacitance (CKE0)
Input capacitance (/CS0)
Input capacitance (CLK0, CLK1, CLK2)
Data and DQS input/output capacitance (DQ0~DQ63)
Input capacitance (DM0~DM7)
Transcend Information Inc.
Symbol
CIN1
CIN2
CIN3
CIN4
COUT
CIN5
7
Min
49
42
42
22
6
6
Max
57
50
50
25
8
8
Unit
pF
pF
pF
pF
pF
pF
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
AC Timing Parameters & Specifications
(These AC characteristics were tested on the Component)
Parameter
Row cycle time
Refresh row cycle time
Row active time
/RAS to /CAS delay
Row active to Row active delay
Row active to Row active delay
Write recovery time
Last data in to Read command
Col. Address to Col. Address delay
Clock cycle time
Clock high level width
Clock low level width
DQS-out access time from CK /CK
Output data access time from CK /CK
Data strobe edge to output data edge
Read Preamble
Read Postamble
CK to valid DQS-in
DQS-in setup time
DQS-in hold time
DQS falling edge to CK rising-setup time
DQS falling edge from CK rising-hold time
DQS-in high level width
DQS-in low level width
DQS-in cycle time
Address and Control input setup time
Address and Control input hold time
Data-out high-impedance time from CK, /CK
Data-out low-impedance time from CK, /CK
Mode register set cycle time
DQ & DM setup time to DQS
DQ & DM hold time to DQS
DQ & DM input pulse width
Exit self refresh to read command
Refresh interval time
Clock half period
DQS write postamble time
Note:
Symbol
tRC
tRFC
tRAS
tRCD
tRP
tRRD
tWR
tCDLR
tCCD
tCK
tCH
tCL
tDQSCK
tAC
tDQSQ
tRPRE
tRPST
tDQSS
tWPRES
tWPREH
tDSS
tDSH
tDQSH
tDQSL
tDSC
tIS
tIH
tHZ
tLZ
tMRD
tDS
tDH
tDIPW
tXSR
tREF
tHP
Min
60
72
42
18
18
12
15
1
1
6
0.45
0.45
-0.6
-0.7
0.9
0.4
0.75
0
0.25
0.2
0.2
0.35
0.35
0.9
0.75
0.75
-0.7
-0.7
12
0.45
0.45
1.75
200
7.8
tCLmin or
tCHmin
tRCD or tRAS
min
tWPST
Max
70K
0.55
0.55
0.6
0.7
0.45
1.1
0.6
1.25
1.1
0.7
0.7
Unit
ns
ns
ns
ns
ns
ns
tCK
tCK
tCK
ns
tCK
tCK
ns
ns
ns
tCK
tCK
tCK
ns
tCK
tCK
tCK
tCK
tCK
tCK
ns
ns
ns
ns
ns
ns
ns
ns
tCK
us
Note
4
4
2
1
ns
tCK
3
1. Maximum burst refresh of 8
2. The specific requirement is that DQS be valid (High or Low) on or before this CK edge. The case shown (DQS
going from High_Z to logic Low) applies when no writes were previously in progress on the bus. If a previous
write was in progress, DQS could be High at this time, depending on tDQSS.
3. The Maximum limit for this parameter is not a device limit. The device will operate with a great value for this
parameter, but system performance (bus turnaround) will degrade accordingly.
4. For registered DINNs, tCL and tCH are >= 45% of the period including both the half period jitter (tJIT(HP) ) of
the PLL and the half period jitter due to crosstalk (tJIT(crosstalk)) on the DIMM.
Transcend Information Inc.
8
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
SIMPLIFIED TRUTH TABLE
COMMAND
Extended
Mode Register Set
Mode Register Set
Auto Refresh
Entry
Self
Refresh Exit
Register
Register
Refresh
Bank Active & Row Addr.
Read &
Column Address
Auto Precharge Disable
Write &
Column Address
Auto Precharge Disable
Auto Precharge Enable
CKEn-1
CKEn
/CS
/RAS
/CAS
/WE
H
X
L
L
L
L
OP CODE
1,2
H
X
H
L
L
L
L
L
OP CODE
L
L
L
H
X
X
1,2
3
3
3
3
H
H
L
H
H
X
H
X
H
X
H
X
L
L
H
H
V
H
X
L
H
L
H
V
X
L
H
L
L
H
X
L
H
H
L
Bank Selection
All Banks
H
X
L
L
H
L
Entry
H
L
H
X
X
X
L
V
V
V
X
X
X
X
H
X
X
X
L
H
H
H
H
X
X
X
L
V
V
V
Auto Precharge Enable
Active Power Down
Exit
Entry
L
H
H
L
Precharge Power
Down Mode
DM
L
No Operation Command
5.
6.
7.
8.
9.
A0~A9,A11, A12
Row Address
L
Column
Address
(A0~A9, A11)
H
L
Column
Address
(A0~A9, A11)
H
X
V
X
Note
L
H
4
4, 5
4
4, 5
6
X
X
H
H
4.
V
A10/AP
X
Exit
Note : 1.
2.
3.
BA0,1
L
H
Burst Stop
Precharge
(V=Valid, X=Don’t Care, H=Logic High, L=Logic Low)
H
X
X
H
X
X
X
L
H
H
H
X
7
X
OP Code: Operand Code. A0 ~ A12 & BA0 ~ BA1: Program keys. (@EMRS/MRS
EMRS/ MRS can be issued only at all banks precharge state.
Auto refresh functions are same as the CBR refresh of DRAM. The automatic precharge without row precharge command is meant by
"Auto". Auto/self refresh can be issued only at all banks precharge state.
BA0 ~ BA1: Bank select addresses. If both BA0 and BA1 are "Low" at read, write, row active and precharge, bank A is selected. If both
BA0 is "High" and BA1 is "Low" at read, write, row active and precharge, bank B is selected. If both BA0 is "Low" and BA1 is "High" at
read, write, row active and precharge, bank C is selected. If both BA0 and BA1 are "High" at read, write, row active and precharge, bank
D is selected.
If A10/AP is "High" at row precharge, BA0 and BA1 are ignored and all banks are selected.
During burst write with auto precharge, new read/write command cannot be issued. Another bank read/write command can be issued
after the end of burst.. New row active of the associated bank can be issued at tRP after the end of burst.
Burst stop command is valid at every burst length.
DM sampled at the rising and falling edges of the DQS and Data-in is masked at the both edges (Write DM latency is 0).
This combination is not defined for any function, which means "No Operation (NOP)" in DDR SDRAM.
Transcend Information Inc.
9
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
Serial Presence Detect Specification
Serial Presence Detect
Byte No.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36-61
Function Described
# of Bytes Written into Serial Memory
Total # of Bytes of S.P.D Memory
Fundamental Memory Type
# of Row Addresses on this Assembly
# of Column Addresses on this Assembly
# of Module Rows on this Assembly
Data Width of this Assembly
Data Width of this Assembly
VDDQ and Interface Standard of this Assembly
DDR SDRAM Cycle Time at CAS Latency=2.5
DDR SDRAM Access Time from Clock at CL=2.5
DIMM configuration type (non-parity, Parity, ECC)
Refresh Rate Type
Primary DDR SDRAM Width
Error Checking DDR SDRAM Width
Min Clock Delay for Back to
Back Random Column Address
Burst Lengths Supported
# of banks on each DDR SDRAM device
CAS Latency supported
CS Latency
WE Latency
Standard
Specification
128bytes
256bytes
DDR SDRAM
13
10
1 bank
64bits
0
SSTL 2.5V
6ns
±0.7ns
Non-ECC
7.8us/Self Refresh
X8
-
Vendor Part
tCCD=1CLK
01
2,4,8
4 bank
2, 2.5
0 CLK
1 CLK
Registered address &
DDR SDRAM Module Attributes
control inputs and
on-card DLL
+/-0.2V voltage
DDR SDRAM Device Attributes: General
tolerance
DDR SDRAM Cycle Time CL=2.0
7.5ns
±0.7ns
DDR SDRAM Access from Clock CL=2.0
DDR SDRAM Cycle Time CL=1.5
DDR SDRAM Access from Clock CL=1.5
Minimum Row Precharge Time (tRP)
18ns
Minimum Row Active to Row Activate delay (tRRD)
12ns
Minimum RAS to CAS Delay (tRCD)
18ns
Minimum active to Precharge time (tRAS)
42ns
Module ROW density
256MB
Command/Address Input Setup Time
0.8ns
Command/Address Input Hold Time
0.8ns
Data Signal Input Setup Time
0.45ns
Data Signal Input Hold Time
0.45ns
Superset Information
-
Transcend Information Inc.
10
80
08
07
0D
0A
01
40
00
04
60
70
00
82
08
00
0E
04
0C
01
02
20
00
75
70
00
00
48
30
48
2A
40
80
80
45
45
00
256MB 184 PIN DDR333 DDR
SDRAM DIMM With 32Mx8 2.5VOLT
JM334D643A-60
62
63
64-71
72
73-90
91-92
93-94
95-98
99-127
128~255
SPD Data Revision Code
Checksum for Bytes 0-62
Manufacturers JEDEC ID
Manufacturing Location
Manufacturers Part Number
Revision Code
Manufacturing Date
Assembly Serial Number
Manufacturer Specific Data
Unused Storage Locations
Transcend Information Inc.
Transcend
By Manufacturer
By Manufacturer
Undefined
11
00
20
7F, 4F
00
00
Variable
Variable
-