Temperature Sensor with Serial Presence-Detect EEPROM
The temperature sensor continuously monitors the module's temperature and can be
read back at any time over the I
2
C bus shared with the SPD EEPROM. Refer to JEDEC
standard No. 21-C page 4.7-1, "Definition of the TSE2002av, Serial Presence Detect with
Temperature Sensor."
Serial Presence-Detect
For the latest SPD data, refer to Micron's SPD page: www.micron.com/SPD.
Table 13: Temperature Sensor with SPD EEPROM Operating Conditions
Parameter/Condition Symbol Min Max Units
Supply voltage V
DDSPD
3.0 3.6 V
Supply current: V
DD
= 3.3V I
DD
– 2.0 mA
Input high voltage: Logic 1; SCL, SDA V
IH
V
DDSPD
x 0.7 V
DDSPD
+ 1 V
Input low voltage: Logic 0; SCL, SDA V
IL
–0.5 V
DDSPD
x 0.3 V
Output low voltage: I
OUT
= 2.1mA V
OL
– 0.4 V
Input current I
IN
–5.0 5.0 µA
Temperature sensing range – –40 125 °C
Temperature sensor accuracy (class B) – –1.0 1.0 °C
Table 14: Temperature Sensor and SPD EEPROM Serial Interface Timing
Parameter/Condition Symbol Min Max Units
Time bus must be free before a new transition can
start
t
BUF 4.7 – µs
SDA fall time
t
F 20 300 ns
SDA rise time
t
R – 1000 ns
Data hold time
t
HD:DAT 200 900 ns
Start condition hold time
t
H:STA 4.0 – µs
Clock HIGH period
t
HIGH 4.0 50 µs
Clock LOW period
t
LOW 4.7 – µs
SCL clock frequency
t
SCL 10 100 kHz
Data setup time
t
SU:DAT 250 – ns
Start condition setup time
t
SU:STA 4.7 – µs
Stop condition setup time
t
SU:STO 4.0 – µs
4GB, 8GB (x72, ECC, DR) 240-Pin DDR3 VLP UDIMM
Temperature Sensor with Serial Presence-Detect EEPROM
PDF: 09005aef84a97472
jdf18c512_1gx72az.pdf - Rev. C 04/13 EN
15
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