M377S0823CT2-C1L [SAMSUNG]

Synchronous DRAM Module, 8MX72, 6ns, CMOS, DIMM-168;
M377S0823CT2-C1L
型号: M377S0823CT2-C1L
厂家: SAMSUNG    SAMSUNG
描述:

Synchronous DRAM Module, 8MX72, 6ns, CMOS, DIMM-168

时钟 动态存储器 内存集成电路
文件: 总10页 (文件大小:171K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
PC100 Registered DIMM  
M377S0823CT2  
M377S0823CT2 SDRAM DIMM (Intel 1.1 ver. Base)  
8Mx72 SDRAM DIMM with PLL & Register based on 8Mx8, 4Banks 4K Ref., 3.3V Synchronous DRAMs with SPD  
FEATURE  
GENERAL DESCRIPTION  
• Performance range  
The Samsung M377S0823CT2 is a 8M bit x 72 Synchronous  
Dynamic RAM high density memory module. The Samsung  
M377S0823CT2 consists of nine CMOS 8Mx8 bit Synchronous  
DRAMs in TSOP-II 400mil packages, two 18-bits Drive ICs for  
input control signal, one PLL in 24-pin TSSOP package for  
clock and one 2K EEPROM in 8-pin TSSOP package for Serial  
Presence Detect on a 168pin glass-epoxy substrate. Two  
0.22uF and one 0.0022uF decoupling capacitors are mounted  
on the printed circuit board in parallel for each SDRAM. The  
M377S0823CT2 is a Dual In-line Memory Module and is  
intented for mounting into 168-pin edge connector sockets.  
Synchronous design allows precise cycle control with the use  
of system clock. I/O transactions are possible on every clock  
cycle. Range of operating frequencies, programmable latencies  
allows the same device to be useful for a variety of high band-  
width, high performance memory system applications.  
Part No.  
Max Freq. (Speed)  
100MHz (10ns @ CL=2)  
100MHz (10ns @ CL=3)  
M377S0823CT2-C1H  
M377S0823CT2-C1L  
• Burst mode operation  
• Auto & self refresh capability (4096 Cycles/64ms)  
• LVTTL compatible inputs and outputs  
• Single 3.3V ± 0.3V power supply  
• MRS cycle with address key programs  
Latency (Access from column address)  
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  
• Serial presence detect with EEPROM  
• PCB : Height (1,500mil) , double sided component  
PIN CONFIGURATIONS (Front side/back side)  
PIN NAMES  
Pin  
Pin Front Pin Front  
Front Pin Back Pin Back Pin Back  
Pin Name  
A0 ~ A11  
BA0 ~ BA1  
DQ0 ~ DQ63  
CB0 ~ CB7  
CLK0  
Function  
Address input (Multiplexed)  
Select bank  
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  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
VSS  
DQ0  
DQ1  
DQ2  
DQ3  
VDD  
DQ4  
DQ5  
DQ6  
DQ7  
DQ8  
VSS  
29 DQM1  
DQ18 85  
VSS  
113 DQM5 141 DQ50  
30  
31  
32  
33  
34  
35  
36  
37  
CS0  
DU  
VSS  
A0  
A2  
A4  
DQ19 86 DQ32 114 *CS1 142 DQ51  
Data input/output  
Check bit (Data-in/data-out)  
Clock input  
VDD  
87 DQ33 115 RAS 143  
VDD  
DQ20 88 DQ34 116  
NC 89 DQ35 117  
*VREF 90 118  
*CKE1 91 DQ36 119  
92 DQ37 120  
DQ21 93 DQ38 121  
VSS  
A1  
A3  
A5  
A7  
A9  
144 DQ52  
145  
NC  
VDD  
146 *VREF  
147 REGE  
CKE0  
Clock enable input  
Chip select input  
Row address strobe  
Colume address strobe  
Write enable  
A6  
A8  
VSS  
148  
VSS  
CS0, CS2  
RAS  
149 DQ53  
38 A10/AP  
DQ22 94 DQ39 122 BA0 150 DQ54  
CAS  
39  
40  
41  
BA1  
VDD  
VDD  
DQ23 95 DQ40 123  
96 124  
A11  
VDD  
151 DQ55  
152  
WE  
VSS  
VSS  
VSS  
DQ9  
DQ24 97 DQ41 125 *CLK1 153 DQ56  
DQ25 98 DQ42 126 *A12 154 DQ57  
DQM0 ~ 7  
VDD  
DQM  
14 DQ10 42 CLK0  
Power supply (3.3V)  
Ground  
15 DQ11 43  
16 DQ12 44  
17 DQ13 45  
VSS  
DU  
CS2  
DQ26 99 DQ43 127  
DQ27 100 DQ44 128 CKE0 156 DQ59  
VDD 101 DQ45 129 *CS3 157  
DQ28 102 VDD 130 DQM6 158 DQ60  
VSS  
155 DQ58  
VSS  
VDD  
*VREF  
Power supply for reference  
Register enable  
Serial data I/O  
18  
VDD  
46 DQM2  
REGE  
SDA  
19 DQ14 47 DQM3  
DQ29 103 DQ46 131 DQM7 159 DQ61  
DQ30 104 DQ47 132 *A13 160 DQ62  
20 DQ15 48  
DU  
VDD  
NC  
SCL  
Serial clock  
21  
22  
23  
24  
25  
26  
27  
CB0  
CB1  
VSS  
NC  
NC  
VDD  
WE  
49  
50  
51  
52  
53  
54  
DQ31 105 CB4 133  
VDD  
NC  
NC  
161 DQ63  
162  
163 *CLK3  
NC  
137 CB7 165 **SA0  
138 166 **SA1  
VSS  
106 CB5 134  
VSS  
SA0 ~ 2  
DU  
Address in EEPROM  
Don¢t use  
NC  
*CLK2 107  
NC 108  
VSS  
NC  
135  
CB2  
CB3  
VSS  
136 CB6 164  
NC  
No connection  
WP 109  
NC  
**SDA 110  
VDD  
VSS  
WP  
Write protection  
55 DQ16  
**SCL 111 CAS 139 DQ48 167 **SA2  
VDD 112 DQM4 140 DQ49 168  
*
These pins are not used in this module.  
28 DQM0 56 DQ17  
VDD  
** These pins should be NC in the system  
which does not support SPD.  
SAMSUNG ELECTRONICS CO., Ltd. reserves the right to change products and specifications without notice.  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
PIN CONFIGURATION DESCRIPTION  
Pin  
Name  
System clock  
Input Function  
CLK  
CS  
Active on the positive going edge to sample all inputs.  
Disables or enables device operation by masking or enabling all inputs except  
CLK, CKE and DQM  
Chip select  
Masks system clock to freeze operation from the next clock cycle.  
CKE should be enabled at least one cycle prior to new command.  
Disable input buffers for power down in standby.  
CKE  
Clock enable  
CKE should be enabled 1CLK+tss prior to valid command.  
Row/column addresses are multiplexed on the same pins.  
Row address : RA0 ~ RA11, Column address : CA0 ~ CA8  
A0 ~ A11  
BA0 ~ BA1  
RAS  
Address  
Selects bank to be activated during row address latch time.  
Selects bank for read/write during column address latch time.  
Bank select address  
Row address strobe  
Column address strobe  
Write enable  
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.  
CAS  
Enables write operation and row precharge.  
Latches data in starting from CAS, WE active.  
WE  
Makes data output Hi-Z, tSHZ after the clock and masks the output.  
Blocks data input when DQM active. (Byte masking)  
DQM0 ~ 7  
Data input/output mask  
The device operates in the transparent mode when REGE is low. When REGE is high,  
the device operates in the registered mode. In registered mode, the Address and con-  
trol 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 VDD through 10K ohm  
Resistor on PCB. So if REGE of module is floating, this module will be operated as reg-  
istered mode.  
REGE  
Register enable  
DQ0 ~ 63  
CB0 ~ 7  
Data input/output  
Check bit  
Data inputs/outputs are multiplexed on the same pins.  
Check bits for ECC.  
WP pin is connected to VSS through 47KW Resistor.  
When WP is "high", EEPROM Programming will be inhibited and the entire memory will  
be write-protected.  
WP  
Write protection  
VDD/VSS  
Power supply/ground  
Power and ground for the input buffers and the core logic.  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
FUNCTIONAL BLOCK DIAGRAM  
PCLK0  
BCS0  
BCKE0  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
·
·
D0  
·
·
·
·
·
·
·
B0A0~B0A11,BBA0~1,BRAS,BCAS,BWE  
BDQM0  
DQ0~7  
10W  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
D1  
D2  
D3  
DQ8~15  
10W  
PCLK1  
·
·
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
BDQM1  
·
CB0~7  
10W  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
BCS2  
·
·
BDQM2  
DQ16~23  
10W  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
PCLK3  
·
D4  
D5  
·
·
BDQM3  
DQ24~31  
DQ32~39  
10W  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
·
BDQM4  
10W  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
D6  
D7  
D8  
·
BDQM5  
DQ40~47  
10W  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
·
·
·
BDQM6  
DQ48~55  
DQ56~63  
10W  
CLK  
CS  
CKE  
Add,CTL  
DQM  
DQ0~7  
BDQM7  
10W  
Notes : Address/Control Signals are connected to D2 through 100 ohms resistor.  
VSS  
V
DD  
B0A0~B0A9  
A0~A9  
1Y0  
1Y1  
1Y2  
1Y3  
1Y4  
2Y0  
2Y1  
2Y2  
SN74ALVC162835  
BRAS,BCAS,BWE  
BDQM0,1,4,5  
BCS0  
RAS,CAS,WE  
DQM0,1,4,5  
CS0  
CDC2509  
PCLK0  
PCLK1  
PCLK2  
PCLK3  
10  
W
LE  
REGE  
CLK  
CLK0  
FBOU  
12pF  
OE  
PCLK2  
*1  
Cb  
10kW  
* Note  
1. The actual values of Cb will depend upon the PLL chosen.  
V
DD  
SN74ALVC162835  
A10,A11,BA0~1  
CS2  
B0A10,B0A11,BBA0~1  
BCS2  
Serial PD  
CKE0  
BCKE0  
DQM2,3,6,7  
BDQM2,3,6,7  
SCL  
WP  
SDA  
A0 A1 A2  
LE  
47K  
W
OE  
SA0 SA1 SA2  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
STANDARD TIMING DIAGRAM WITH PLL & REGISTER (CL=2, BL=4)  
*2  
REG  
*1  
DOUT  
Control Signal(RAS,CAS,WE)  
*3  
*1. Register Input  
0
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
CLK  
RAS  
CAS  
WE  
*2. Register Output  
RAS  
td  
tr  
td  
tr  
CAS  
WE  
*3. SDRAM  
CAS latency(refer to *1)  
=2CLK+1CLK  
1CLK  
tSAC  
tRAC(refer to *1)  
tRAC(refer to *2)  
Qa0 Qa1 Qa2 Qa3  
Db0 Db1 Db2 Db3  
DQ  
CAS latency(refer to *2)  
=2CLK  
tRDL  
Row Active  
Precharge  
Command  
Row Active  
Read  
Command  
Precharge  
Command  
Write  
Command  
td, tr = Delay of register (SN74ALVC162835)  
Notes : 1. In case of module timing, command cycles delayed 1CLK with respect to external input timing at the address and input signal  
because of the buffering in register (SN74ALVC162835). Therefore, Input/Output signals of read/write function should be  
issued 1CLK earlier as compared to Unbuffered DIMMs.  
2. DIN is to be issued 1clock after write command in external timing because DIN is issued directly to module.  
: Don¢t care  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
ABSOLUTE MAXIMUM RATINGS  
Parameter  
Voltage on any pin relative to Vss  
Voltage on VDD supply relative to Vss  
Storage temperature  
Symbol  
VIN, VOUT  
VDD, VDDQ  
TSTG  
Value  
-1.0 ~ 4.6  
-1.0 ~ 4.6  
-55 ~ +150  
9
Unit  
V
V
°C  
W
Power dissipation  
PD  
Short circuit current  
IOS  
50  
mA  
Note :  
Permanent device damage may occur if "ABSOLUTE MAXIMUM RATINGS" are exceeded.  
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 AND CHARACTERISTICS  
Recommended Operating Conditions (Voltage Referenced to VSS = 0V, TA = 0 to 70°C)  
Parameter  
Supply voltage  
Symbol  
VDD  
VIH  
Min  
3.0  
2.0  
-0.3  
2.4  
-
Typ  
Max  
Unit  
V
Note  
3.3  
3.6  
Input high voltage  
3.0  
VDDQ+0.3  
V
1
Input low voltage  
VIL  
0
-
0.8  
-
V
2
IOH = -2mA  
IOL = 2mA  
3
Output high voltage  
VOH  
VOL  
IIL  
V
Output low voltage  
-
0.4  
2
V
Input leakage current (Inputs)  
Input leakage current (I/O pins)  
-2  
-
uA  
uA  
IIL  
-1.5  
-
1.5  
3,4  
Notes :  
1. VIH (max) = 5.6V AC. The overshoot voltage duration is £ 3ns.  
2. VIL (min) = -2.0V AC. The undershoot voltage duration is £ 3ns.  
3. Any input 0V £ VIN £ VDDQ  
Input leakage currents include Hi-Z output leakage for all bi-directional buffers with Tri-State outputs.  
4. Dout is disabled, 0V £ VOUT £ VDDQ  
CAPACITANCE (VDD = 3.3V, TA = 23°C, f = 1MHz, VREF =1.4V ± 200 mV)  
Parameter  
Symbol  
Min  
Max  
Unit  
Input capacitance (A0 ~ A11)  
CIN1  
CIN2  
-
-
-
-
-
-
-
-
-
15  
15  
15  
26  
15  
15  
15  
17  
17  
pF  
pF  
pF  
pF  
pF  
pF  
pF  
pF  
pF  
Input capacitance (RAS, CAS, WE)  
Input capacitance (CKE0)  
CIN3  
Input capacitance (CLK0)  
CIN4  
Input capacitance (CS0, CS2)  
CIN5  
Input capacitance (DQM0 ~ DQM7)  
Input capacitance (BA0 ~ BA1)  
Data input/output capacitance (DQ0 ~ DQ63)  
Data input/output capacitance (CB0 ~ CB7)  
CIN6  
CIN7  
COUT  
COUT1  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
DC CHARACTERISTICS  
(Recommended operating condition unless otherwise noted, TA = 0 to 70°C)  
Version  
CAS  
Latency  
Parameter  
Symbol  
Test Condition  
Burst length = 1  
tRC ³ tRC(min)  
IOL = 0 mA  
Unit Note  
-1H  
-1L  
Operating current  
(One bank active)  
ICC1  
780  
780  
mA  
mA  
1
3
ICC2P  
CKE £ VIL(max), tCC = 15ns  
11  
11  
Precharge standby current in  
power-down mode  
ICC2PS  
CKE & CLK £ VIL(max), tCC = ¥  
CKE ³ VIH(min), CS ³ VIH(min), tCC = 15ns  
Input signals are changed one time during 30ns  
ICC2N  
110  
56  
Precharge standby current in  
non power-down mode  
mA  
mA  
3
3
CKE ³ VIH(min), CLK £ VIL(max), tCC = ¥  
Input signals are stable  
ICC2NS  
ICC3P  
CKE £ VIL(max), tCC = 15ns  
20  
20  
Active standby current in  
power-down mode  
ICC3PS  
CKE & CLK £ VIL(max), tCC = ¥  
CKE ³ VIH(min), CS ³ VIH(min), tCC = 15ns  
Input signals are changed one time during 30ns  
ICC3N  
182  
92  
mA  
mA  
3
3
Active standby current in non  
power-down mode  
CKE ³ VIH(min), CLK £ VIL(max), tCC = ¥  
Input signals are stable  
ICC3NS  
IOL = 0mA  
Page burst  
2Banks activated  
tCCD=2CLK  
3
825  
825  
825  
780  
Operating current  
(Burst mode)  
ICC4  
mA  
1
2
Refresh current  
ICC5  
ICC6  
tRC ³ tRC(min)  
CKE £ 0.2V  
1,126  
11  
mA  
mA  
2
3
Self refresh current  
Notes :  
1. Measured with outputs open.  
2. Refresh period is 64ms.  
3. Measured with 1 PLL & 2 Drive ICs.  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
AC OPERATING TEST CONDITIONS (VDD = 3.3V ± 0.3V, TA = 0 to 70°C)  
Parameter  
AC input levels (Vih/Vil)  
Value  
2.4/0.4  
1.4  
Unit  
V
Input timing measurement reference level  
Input rise and fall time  
V
tr/tf = 1/1  
1.4  
ns  
V
Output timing measurement reference level  
Output load condition  
See Fig. 2  
3.3V  
Vtt = 1.4V  
1200W  
50W  
VOH (DC) = 2.4V, IOH = -2mA  
VOL (DC) = 0.4V, IOL = 2mA  
Output  
Output  
Z0 = 50W  
50pF  
50pF  
870W  
(Fig. 1) DC output load circuit  
(Fig. 2) AC output load circuit  
OPERATING AC PARAMETER (AC operating conditions unless otherwise noted)  
Version  
Parameter  
Symbol  
Unit  
Note  
-1H  
20  
20  
20  
50  
-1L  
20  
20  
20  
50  
Row active to row active delay  
RAS to CAS delay  
tRRD(min)  
tRCD(min)  
tRP(min)  
ns  
ns  
1
1
1
1
Row precharge time  
ns  
tRAS(min)  
tRAS(max)  
tRC(min)  
ns  
Row active time  
100  
us  
Row cycle time  
70  
70  
ns  
1
2
2
2
3
Last data in to new col. address delay  
Last data in to row precharge  
Last data in to burst stop  
tCDL(min)  
tRDL(min)  
tBDL(min)  
tCCD(min)  
1
1
1
1
2
1
CLK  
CLK  
CLK  
CLK  
Col. address to col. address delay  
CAS latency=3  
CAS latency=2  
Number of valid output data  
ea  
4
Notes : 1. The minimum number of clock cycles is determined by dividing the minimum time required with clock cycle time  
and then rounding off to the next higher integer.  
2. Minimum delay is required to complete write in Reg. DIMM (1 CLK earlier than Unbuff. DIMM)  
3. All parts allow every cycle column address change.  
4. In case of row precharge interrupt, auto precharge and read burst stop.  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
AC CHARACTERISTICS (AC operating conditions unless otherwise noted)  
REFER TO THE INDIVIDUAL COMPONENET, NOT THE WHOLE MODULE.  
-1H  
-1L  
Parameter  
Symbol  
Unit  
ns  
Note  
1
Min  
10  
Max  
Min  
10  
Max  
CAS latency=3  
CLK cycle time  
tCC  
1000  
1000  
CAS latency=2  
CAS latency=3  
CAS latency=2  
CAS latency=3  
CAS latency=2  
10  
12  
6
6
6
7
CLK to valid  
output delay  
tSAC  
ns  
1,2  
1,2  
3
3
3
3
2
1
1
3
3
3
3
2
1
1
Output data  
hold time  
tOH  
ns  
CLK high pulse width  
CLK low pulse width  
Input setup time  
tCH  
tCL  
ns  
ns  
ns  
ns  
ns  
3
3
3
3
2
tSS  
tSH  
tSLZ  
Input hold time  
CLK to output in Low-Z  
CAS latency=3  
CAS latency=2  
6
6
6
7
CLK to output  
in Hi-Z  
tSHZ  
ns  
1
Notes :  
1. Parameters depend on programmed CAS latency.  
2. If clock rising time is longer than 1ns, (tr/2-0.5)ns should be added to the parameter.  
3. Assumed input rise and fall time (tr & tf) = 1ns.  
If tr & tf is longer than 1ns, transient time compensation should be considered,  
i.e., [(tr + tf)/2-1]ns should be added to the parameter.  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
SIMPLIFIED TRUTH TABLE  
A11,  
A9 ~ A0  
Command  
CKEn-1  
CKEn  
CS  
RAS  
CAS  
WE  
DQM BA0,1  
A10/AP  
Note  
Register  
Refresh  
Mode register set  
Auto refresh  
H
X
H
L
L
L
L
L
X
OP code  
1,2  
3
H
L
L
L
L
H
X
X
X
X
Entry  
3
Self  
L
H
L
H
X
L
H
X
H
H
X
H
3
refresh  
Exit  
H
3
Bank active & row addr.  
H
H
X
X
X
X
V
V
Row address  
Column  
address  
(A0 ~ A8)  
Read &  
column address  
Auto precharge disable  
Auto precharge enable  
Auto precharge disable  
Auto precharge enable  
L
H
L
4
4,5  
4
L
L
H
H
L
L
H
L
Column  
address  
(A0 ~ A8)  
Write &  
column address  
H
X
X
V
H
X
L
4,5  
6
Burst stop  
Precharge  
H
H
X
X
L
L
H
L
H
H
L
L
X
X
Bank selection  
All banks  
V
X
X
H
H
L
X
V
X
X
H
X
V
X
X
H
X
V
X
X
H
X
V
X
V
X
X
H
X
V
Entry  
H
L
X
Clock suspend or  
active power down  
X
X
Exit  
L
H
L
X
H
L
X
X
Entry  
H
Precharge power down mode  
H
L
Exit  
L
H
X
X
DQM  
H
H
V
X
X
X
7
H
L
X
H
X
H
No operation command  
(V=Valid, X=Don¢t care, H=Logic high, L=Logic low)  
1. OP Code : Operand code  
Notes :  
A0 ~ A11 & BA0 ~ BA1 : Program keys. (@ MRS)  
2. MRS can be issued only at all banks precharge state.  
A new command can be issued after 2 clock cycles of MRS.  
3. Auto refresh functions are as same as CBR refresh of DRAM.  
The automatical precharge without row precharge command is meant by "Auto".  
Auto/self refresh can be issued only at all banks precharge state.  
4. 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 "Low" and BA1 is "High" at read, write, row active and precharge, bank B is selected.  
If both BA0 is "High" and BA1 is "Low" 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 is ignored and all banks are selected.  
5. During burst read or write with auto precharge, new read/write command can not 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.  
6. Burst stop command is valid at every burst length.  
7. DQM sampled at positive going edge of a CLK and masks the data-in at the very CLK (Write DQM latency is 0),  
but makes Hi-Z state the data-out of 2 CLK cycles after. (Read DQM latency is 2)  
Rev. 0.0 Jun. 1999  
PC100 Registered DIMM  
M377S0823CT2  
PACKAGE DIMENSIONS  
Units : Inches (Millimeters)  
5.250  
(133.350)  
0.054  
(1.372)  
5.014  
0.118  
(3.000)  
(127.350)  
R 0.079  
(R 2.000)  
0.157 ± 0.004  
(4.000 ± 0.100)  
PLL  
B
C
A
.118DIA ± 0.004  
(3.000DIA ± 0.100)  
0.250  
(6.350)  
0.250  
(6.350)  
0.350  
(8.890)  
1.450  
(36.830)  
2.150  
(54.61)  
.450  
(11.430)  
4.550  
(115.57)  
0.150 Max  
(3.81 Max)  
REG  
REG  
0.050 ± 0.0039  
(1.270 ± 0.10)  
0.250  
(6.350)  
0.250  
(6.350)  
0.039 ± 0.002  
(1.000 ± 0.050)  
0.123 ± 0.005  
(3.125 ± 0.125)  
0.123 ± 0.005  
(3.125 ± 0.125)  
0.008 ±0.006  
(0.200 ±0.150)  
0.050  
(1.270)  
0.079 ± 0.004  
(2.000 ± 0.100)  
0.079 ± 0.004  
(2.000 ± 0.100)  
Detail A  
Detail B  
Detail C  
Tolerances : ± 0.005(.13) unless otherwise specified  
The used device is 8Mx8 SDRAM, TSOP  
SDRAM Part No. : K4S640832C  
Rev. 0.0 Jun. 1999  

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