M391B5273DH0 SAMSUNG [Samsung semiconductor], M391B5273DH0 Datasheet - Page 7

• Manufacturer Part Number: M391B5273DH0
• Description: 240pin Unbuffered DIMM based on 2Gb D-die
• Manufacturer: SAMSUNG [Samsung semiconductor]

Unbuffered DIMM
6. Pin Description
NOTE :
* The V
** DM8, DQS8 and DQS8 are for ECC UDIMM only.
7. SPD and Thermal Sensor for ECC UDIMMs
On DIMM thermal sensor will provide DRAM temperature readout through a integrated thermal sensor.
[ Table 1 ] Temperature Sensor Characteristics
Pin Name
A0-A14
BA0-BA2
RAS
CAS
WE
S0, S1
CKE0,CKE1
ODT0, ODT1
DQ0 - DQ63
CB0 - CB7
DQS0 - DQS8
DQS0-DQS8
DM0-DM8
CK0, CK1
CK0, CK1
DD
Grade
B
and V
DDQ
Description
SDRAM address bus
SDRAM bank select
SDRAM row address strobe
SDRAM column address strobe
SDRAM write enable
DIMM Rank Select Lines
SDRAM clock enable lines
On-die termination control lines
DIMM memory data bus
DIMM ECC check bits
SDRAM data strobes
(positive line of differential pair)
SDRAM differential data strobes
(negative line of differential pair)
SDRAM data masks/high data strobes
(x8-based x72 DIMMs)
SDRAM clocks
(positive line of differential pair)
(negative line of differential pair)
SDRAM clocks
pins are tied common to a single power-plane on these designs.
Resolution
-20 < Ta < 125
40 < Ta < 125
75 < Ta < 95
NOTE :
1. Raw Cards D (1Rx8 ECC) and E (2Rx8 ECC) support a thermal sensor.
2. When the SPD and the thermal sensor are placed on the module, R1 is placed but R2 is not.
Range
EVENT
When only the SPD is placed on the module, R2 is placed but R1 is not.
SCL
R1
0 Ω
datasheet
R2
0 Ω
WP/EVENT
SA0
SA0
Min.
- 7 -
-
-
-
Pin Name
SCL
SDA
SA0-SA2
V
V
V
V
V
V
NC
TEST
RESET
EVENT
V
RFU
DD
DDQ
REFDQ
REFCA
SS
DDSPD
TT
Temperature Sensor Accuracy
SA1
*
SA1
*
SA2
SA2
+/- 0.5
+/- 1.0
+/- 2.0
Description
I
I
I
SDRAM core power supply
SDRAM I/O Driver power supply
SDRAM I/O reference supply
SDRAM command/address reference supply
Power supply return (ground)
Serial EEPROM positive power supply
Spare Pins(no connect)
Used by memory bus analysis tools
(unused on memory DIMMs)
Set DRAMs Known State
Reserved for optional temperature-sensing hardware
SDRAM I/O termination supply
Reserved for future use
2
2
2
Typ.
0.25
C serial bus clock for EEPROM
C serial bus data line for EEPROM
C serial address select for EEPROM
SDA
+/- 1.0
+/- 2.0
+/- 3.0
Max.
DDR3 SDRAM
°C /LSB
Units
°C
NOTE
Rev. 1.4
-
-
-
-