MCP9805T-BE/ST Microchip Technology, MCP9805T-BE/ST Datasheet
MCP9805T-BE/ST
Specifications of MCP9805T-BE/ST
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MCP9805T-BE/ST Summary of contents
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... DD_SPD * Serial Presence Detect © 2005 Microchip Technology Inc. Description Microchip Technology Inc.’s MCP9805 digital tempera- ture sensor converts temperatures between -40°C and +125° digital word. This sensor is designed to meet the JEDEC standard JC42.4 for Mobile Platform Memory Module Thermal Sensor. This device provides an accuracy of ± ...
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... Continuous Operation µA Shutdown Mode V V Falling Edge DD °C ° 3.3V + 150 mVpp MHz +25°C A °C Active Temp. Range °C Monitor Temp. Range °C ° samples/sec. (typ.) µ 3. Time to 63% of +22°C (Air) to +125°C (Oil Bath) s © 2005 Microchip Technology Inc. ...
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... Low-Level Current Capacitance SDA and SCLK Inputs Hysteresis Graphical Symbol Description SDA & SCLK INPUTS Voltage time Current I IN time © 2005 Microchip Technology Inc. = 3.0V to 3.6V, GND = Ground and T DD Sym Min Typ Max V 2.1 — — — — 0.8 ...
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... JA to exceed Maximum Junction Temperature (+150°C -20°C to +125°C, A Conditions (V - 0.15V 0.15V) IL MAX IH MIN (V + 0.15V 0.15V) IH MIN IL MAX t B-FREE t t SU-STOP LOW STOP Condition Units Conditions °C °C Note 1 °C — °C/W — °C/W © 2005 Microchip Technology Inc. ...
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... A 60 3.3V DD 120 samples 50% 40% 30% 20% 10% 0% Temperature Accuracy (°C) FIGURE 2-3: Temperature Accuracy Histogram +75°C. A © 2005 Microchip Technology Inc. = 0.1 µF de_cap 500 V = 3.3V to 3.6V DD 450 400 350 300 250 200 150 100 100 120 -40 -20 FIGURE 2-4: Temperature ...
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... FIGURE 2-12: Response 0. 3.3V = 3.0V = 3.6V - 100 120 T (°C) A SDA IOL vs. Ambient = 3.0V PSR = 0.3°C 3.6V - 100 120 T (°C) A Temperature Accuracy vs. TSSOP-8 DFN-8 22°C (Air) to +125°C (Oil bath Time (s) Package Thermal © 2005 Microchip Technology Inc. ...
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... Open-Drain Serial Data Line (SDA) SDA is a bidirectional input/output pin, used to serially transmit data to/from the host controller. This pin requires a pull-up resistor. (See Section 5.0 “Serial Communication”). © 2005 Microchip Technology Inc. Pin Function Slave Address Slave Address Slave Address ...
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... Event Output Status Enable/Disable Event Output Critical Event Output only Event Output Polarity, Active-High/Low Event Output Comparator/Interrupt ) A ) UPPER ) LOWER ) CRIT Event V GND compatible serial interface Band Gap Temperature Sensor ADC 2 SMBus/Standard I C™ Interface SDA SCLK © 2005 Microchip Technology Inc. ...
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... Manufacturer ID register 111 = Device ID/Revision register Legend Readable bit - n = Value at POR © 2005 Microchip Technology Inc. The Capability register is used to provide bits describing the MCP9805’s capability in measurement resolution, measurement range and device accuracy. The device Configuration register provides access to configure the MCP9805’ ...
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... U-0 R-0 R-1 Resolution /T /T UPPER LOWER CRIT U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared U-0 — bit 8 R-1 R-1 R-1 Meas. Accuracy Temp. Range Event bit 0 registers) and a temperautre x = Bit is unknown © 2005 Microchip Technology Inc. ...
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... R = Readable bit W = Writable bit - n = Value at POR ‘1’ = Bit is set © 2005 Microchip Technology Inc. The temperature hysteresis bits 10 and 9 can be used to prevent output chatter when the ambient tempera- ture gradually changes beyond the user-specified temperature boundary (see Section 4.2.2 “Tempera- ture Hysteresis (T or Shutdown mode is selected using bit 8 ...
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... T . (power-up default) LOWER CRIT and T temperature boundaries are disabled.) LOWER U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared R/W-0 R/W-0 SHDN bit 8 R/W-0 R/W-0 R/W-0 Event Event Event Sel. Pol. Mod. bit Bit is unknown © 2005 Microchip Technology Inc. ...
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... Unimplemented: Read as ‘0’ Note: This table reflects the three 16-bit registers T ‘0000 0011’b and ‘0000 0100’b, respectively (see Register 4-1). Legend Readable bit W = Writable bit -n = Value at POR ‘1’ = bit is set © 2005 Microchip Technology Inc UPPER ) and a LOWER ) that CRIT /T ) ADDRESS ‘ ...
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... T A CRIT is greater than T and bit 13 A UPPER is less than LOWER ADDRESS ‘0000 0101’b R-0 R-0 R °C/LSb 2 °C/LSb 2 °C/LSb bit 8 R-0 U-0 U-0 -2 (2) °C/LSb — — bit 0 = 0°C, HYST x = bit is unknown © 2005 Microchip Technology Inc. , ...
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... Note 1: Not affected by the status of the Event output configuration (bits CONFIG) and T Register 4-3. 2: Bit 1 may remain set ‘1’ for some devices indicating 2 depending on the state of the device calibration code. Legend Readable bit W = Writable bit -n = Value at POR ‘1’ = bit is set © 2005 Microchip Technology Inc R-0 R-0 R-0 7 Vs. T SIGN 2 ° ...
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... R-0 Device Revision U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared ADDRESS ‘0000 0110’b R-0 bit 8 R-1 R-0 R-0 bit Bit is unknown ADDRESS ‘0000 0111’b R-0 bit 8 R-0 R-0 R-0 bit Bit is unknown © 2005 Microchip Technology Inc. ...
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... LOWER CRIT prevent false triggers at the Event output due to an accidental rewrite to these registers. © 2005 Microchip Technology Inc. MCP9805 The Event output can also be used as a critical temper- ature output using bit 2 of CONFIG (critical output only). When this feature is selected, the Event output becomes a comparator output ...
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... FIGURE 4-2: Event Output Boundary Conditions. DS21977B-page UPPER HYST T -T LOWER HYST Event Output Comparator Interrupt HYST HYST the Event output is in Comparator mode and bit CRIT HYST CRIT HYST UPPER HYST T -T LOWER HYST * bits A Critical © 2005 Microchip Technology Inc. ...
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... POWER-UP DEFAULTS Registers Address (Hex) Register Label 0x00 Capability 0x01 CONFIG 0x02 0x03 T 0x04 0x05 0x06 Manufacturer ID 0x07 Device ID/Device Revision © 2005 Microchip Technology Inc. drifts below the Default Register Data (Hex) 0x000F 0x0000 T 0x0000 UPPER 0x0000 LOWER T 0x0000 CRIT T 0x0000 A ...
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... ACK. Bit 8 in the address byte is a read/write bit. Setting this bit to ‘1’ commands a read operation, while ‘0’ commands a write operation (see Figure 5-1). . B-FREE register (repeated pointer the previously-specified pointer ‘1’ or GND ‘0’. The 7-bit DD © 2005 Microchip Technology Inc. ...
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... After the Start condition, each bit of data in transmis- sion needs to be settled for a time specified by t before SCLK toggles from low-to-high (see Serial Interface Timing Characteristics). © 2005 Microchip Technology Inc. 5.1.6 ACKNOWLEDGE (ACK) Each receiving device, when addressed, is obliged to generate an ACK bit after the reception of each byte. ...
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... SCLK A A SDA Address Byte S = START Condition P = STOP Condition FIGURE 5-2: Read 1-byte and 2-byte data from a Register. DS21977B-page Pointer MCP9805 MCP9805 Address Byte MCP9805 Pointer MCP9805 MSb Data Master MCP9805 Data Master LSb Data Master © 2005 Microchip Technology Inc. ...
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... Write 1-byte Data SCLK A A SDA Address Byte Write 2-byte Data SCLK SDA Address Byte S = START Condition P = STOP Condition FIGURE 5-3: Write 1-byte and 2-byte data from a Register. © 2005 Microchip Technology Inc Pointer MCP9805 MCP9805 Pointer MCP9805 MSb Data MCP9805 ...
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... Register Pointer. This device does not support sequential read/write START Condition P = STOP Condition FIGURE 5-4: Receive 1-byte Data from Previously Set Pointer. DS21977B-page 24 (Note Pointer MCP9805 Address Byte MCP9805 Address Byte MCP9805 MCP9805 Data Master Data Master © 2005 Microchip Technology Inc. ...
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... Temperature Sensor EEPROM FIGURE 6-2: Multiple Devices on DIMM SMBus. © 2005 Microchip Technology Inc. 6.2 Layout Considerations The MCP9805 does not require any additional compo- nents besides the master controller in order to measure temperature. However recommended that a decoupling capacitor of 0.1 µ µF be used between the V and GND pins ...
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... Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. DS21977B-page 26 : Example ABA 536 56 Example: 805B 0536 256 © 2005 Microchip Technology Inc. ...
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... Package may have one or more exposed tie bars at ends. BSC: Basic Dimension. Theoretically exact value shown without tolerances. See ASME Y14.5M REF: Reference Dimension, usually without tolerance, for information purposes only. See ASME Y14.5M JEDEC Equivalent MO-229 VCED-2 DWG No. C04-123 © 2005 Microchip Technology Inc EXPOSED METAL PAD ...
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... Revised 07-21-05 © 2005 Microchip Technology Inc. ...
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... APPENDIX A: REVISION HISTORY Revision B (September 2005) • Added the text “for Mobile Platform Memory Module Thermal Sensor” to first bullet under Features section. Revision A (September 2005) • Original Release of this Document. © 2005 Microchip Technology Inc. MCP9805 DS21977B-page 29 ...
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... MCP9805 NOTES: DS21977B-page 30 © 2005 Microchip Technology Inc. ...
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... ST = Plastic Thin Shrink Small Outline (4x4 mm Body), 8-lead © 2005 Microchip Technology Inc. Examples: /XX a) Package b) c) MCP9805 . MCP9805T-BE/MC: Tape and Reel, Extended Temp., 8LD DFN pkg. MCP9805-BE/ST: Extended Temp., 8LD TSSOP pkg. MCP9805T-BE/ST: Tape and Reel, Extended Temp., 8LD TSSOP pkg. DS21977B-page 31 ...
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... MCP9805 NOTES: DS21977B-page 32 © 2005 Microchip Technology Inc. ...
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... PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance and WiperLock are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
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... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2005 Microchip Technology Inc. EUROPE Austria - Weis Tel: 43-7242-2244-399 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...