900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP9843 Datasheet

Memory Module Temperature Sensor w/ EEPROM

No Preview Available !

MCP9843/98243
Memory Module Temperature Sensor w/ EEPROM for SPD
Features
• Meets JEDEC Specification
- MCP9843 - JC42.4-TSE3000B3
Temperature Sensor
- MCP98243 --> JC42.4-TSE2002B3
Temperature Sensor with 2 Kbit Serial
EEPROM for Serial Presence Detect (SPD)
• 2-wire I2C™/SMBus Interface
• Available Packages:
- DFN-8, TDFN-8, UDFN-8, TSSOP-8
Temperature Sensor Features
• Temperature-to-Digital Converter
• Sensor Accuracy (Grade B):
- ±0.2°C/±1°C (typ./max.) +75°C to +95°C
- ±0.5°C/±2°C (typ./max.) +40°C to +125°C
- ±1°C/±3°C (typ./max.) -20°C to +125°C
• Specified VDD Range: 3.0V to 3.6V
• Operating Current: 200 µA (typical)
• Operating VDD Range: 2.7V to 5.5V
Serial EEPROM Features (MCP98243)
• Specified VDD Range: 1.8V to 5.5V
• Operating Current:
- Write 1.1 mA (typical) for 3.5 ms (typical)
- Read 100 µA (typical)
• Permanent and Reversible Software Write Protect
• Software Write Protection for the lower 1 Kbit
• Organized as 1 block of 256 x 8-bit (2 Kbit)
Typical Applications
• DIMM Modules for Servers, PCs, and Laptops
• General Purpose Temperature Datalog
DIMM MODULE
MCP9843/98243
Description
Microchip Technology Inc.’s MCP9843/98243 digital
temperature sensors convert temperature from -40°C
and +125°C to a digital word. These sensors meet
JEDEC Specification JC42.4-TSE3000B3 and
JC42.4-TSE2002B3 Memory Module Thermal Sensor
Component. It provides an accuracy of ±0.2°C/±1°C
(typical/maximum) from +75°C to +95°C. In addition,
MCP98243 has an internal 256 Byte EEPROM which
can be used to store memory module and vendor
information.
The MCP9843/98243 digital temperature sensor
comes with user-programmable registers that provide
flexibility for DIMM temperature-sensing applications.
The registers allow user-selectable settings such as
Shutdown or Low-Power modes and the specification
of temperature Event boundaries. When the
temperature changes beyond the specified Event
boundary limits, the MCP9843/98243 outputs an Alert
signal at the Event pin. The user has the option of
setting the temperature Event output signal polarity as
either an active-low or active-high comparator output
for thermostat operation, or as a temperature Event
interrupt output for microprocessor-based systems.
The MCP98243 EEPROM is designed specifically for
DRAM DIMMs (Dual In-line Memory Modules) Serial
Presence Detect (SPD). The lower 128 Bytes (address
0x00 to 0x7F) can be Permanent Write Protected
(PWP) or Software Reversible Write Protected (SWP).
This allows DRAM vendor and product information to
be stored and write protected. The upper 128 bytes
(address 0x80 to 0xFF) can be used for general
purpose data storage. These addresses are not write
protected.
This sensor has an industry standard 2-wire,
I2C compatible serial interface, allowing up to eight
devices to be controlled in a single serial bus.
Package Types
8-Pin 2x3 DFN/TDFN/UDFN * 8-Pin TSSOP
A0 1
8 VDD
A0 1
A1 2 EP 7 Event A1 2
A2 3 9 6 SCL
A2 3
GND 4
5 SDA GND 4
8 VDD
7 Event
6 SCL
5 SDA
* Includes Exposed Thermal Pad (EP); see Table 3-1.
© 2009 Microchip Technology Inc.
DS22153C-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP9843 Datasheet

Memory Module Temperature Sensor w/ EEPROM

No Preview Available !

MCP9843/98243
Sensor Typical Accuracy Performance
50%
40%
TA = +85°C
1,063,478 units
63 Production lots
30%
20%
10%
0%
Statistics:
Average = 0.003 °C
St. Dev = 0.13 °C
±3 Sigma = ±0.4 °C
Temperature Accuracy (°C)
Note:
This accuracy data from the production system represents the typical accuracy performance of the
MCP98242 Memory Module Temperature Sensor. The MCP98242 production methodology is also used for
the MCP9843/98243 to achieve the same typical accuracy performance.
MCP98243 VS. MCP98242
Feature
Event Output in Shutdown Mode
I2C communication Timeout Range
I2C Maximum Bus Frequency
I2C SCL & SDA VIL/VIH voltage levels
VHV A0 range
I2C Spike Supression
I2C input hysteresis
Device/Revision ID Register
MCP98243
MCP98242
Event Output De-asserts
Event Output Remains in previous
state. If the output asserts before
shutdown command, it remains
asserted during shutdown
tOUT = 25 ms to 35 ms
400 kHz
tOUT = 20 ms to 50 ms
100 kHz
VIL_MAX=0.3*VDD, VIH_MIN=0.7*VDD
7V to 12V
VIL_MAX = 0.8V, VIH_MIN = 2.1V
8V to 12V
50 ns
0.05VDD
0x2101 (hex)
0.5V
0x2001
DS22153C-page 2
© 2009 Microchip Technology Inc.


Part Number MCP9843
Description Memory Module Temperature Sensor w/ EEPROM
Maker Microchip Technology
Total Page 30 Pages
PDF Download

MCP9843 Datasheet PDF

View PDF for Mobile






Similar Datasheet

1 MCP9843 Memory Module Temperature Sensor w/ EEPROM
Microchip Technology
2 MCP9844 1.8V Digital Temperature Sensor
Microchip Technology





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy