MCP98242-CE/ST Microchip Technology, MCP98242-CE/ST Datasheet
MCP98242-CE/ST
Specifications of MCP98242-CE/ST
Related parts for MCP98242-CE/ST
MCP98242-CE/ST Summary of contents
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... Low-Power temperature event and critical output boundaries. When the temperature changes beyond the specified boundary limits, the MCP98242 outputs an Event signal. The user has the option of setting the Event output signal polarity as either an active-low or active- high comparator output for thermostat operation temperature event interrupt output for microproces- sor-based systems ...
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... MCP98242 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † V .................................................................................. 6.0V DD Voltage at all Input/Output pins ............... GND – 0.3V to 6.0V Pin A0.................................................... GND – 0.3V to 12.5V Storage temperature .....................................-65°C to +150°C Ambient temp. with power applied ................-40°C to +125°C Junction Temperature (T )........................................... +150°C J ESD protection on all pins (HBM:MM) ................. (4 kV:300V) Latch-Up Current at each pin (25° ...
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... A T -40 — +125 A T -65 — +150 A θ — 41 — JA θ — 41 — JA θ — 123.7 — exceed Maximum Junction Temperature (+150°C). J MCP98242 Conditions V V µ µ 0. OUTPUT time Units Conditions °C (Note 1) °C °C °C/W °C/W °C/W DS21996B-page 3 ...
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... MCP98242 0 SENSOR AND EEPROM SERIAL INTERFACE TIMING SPECIFICATIONS Electrical Specifications: Unless otherwise indicated pF, and all limits measured to 50% point. L Parameters Sym 2 2-Wire I C/SMBus-Compatible Interface Serial Port Frequency f Low Clock t LOW High Clock t HIGH Rise Time t Fall Time Data Setup Before SCLK High ...
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... EEPROM Read (Sensor in Shutdown Mode) 1 100 120 -40 FIGURE 2-4: Temperature. 3. 2.50 2.00 1.50 1.00 0.50 0.00 -40 FIGURE 2-5: Temperature. 3 2.5 2 1.5 1 0.5 0 -40 -20 FIGURE 2-6: Voltage vs. Temperature. MCP98242 , and 3.3V to 3. 100 120 T (°C) A Supply Current vs. = 3.0V to 3.6V - 100 120 T (° Shutdown Current vs. 0 ...
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... MCP98242 Note: Unless otherwise indicated -20°C to +125° 3. 0.3 0.2 SDA 0.1 Event 0 -40 - (°C) A FIGURE 2-7: Event and SDA V Temperature. 125 V = 3.0V to 3.6V DD 110 -40 - (°C) A FIGURE 2-8: Conversion Rate vs. Temperature. 1.0 ° 3.3V + 150 (AC) 0.5 0.0 -0.5 No decoupling capacitor -1 ...
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... Section 4.0 “Serial Communication”). Table 3-2. 3.5 Open-Drain Temperature Alert Slave Output (Event) Address The MCP98242 Event pin is an open-drain output. The device outputs a signal when the ambient temperature goes beyond the user-programmed temperature limit. (see Section 5.2.3 “Event Output Configuration”). X ...
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... The bus is controlled by a master device (typically a microcontroller) that controls the bus access and generates the Start and Stop conditions. The MCP98242 is a slave device and does not control other devices in the bus. Both master and slave devices can operate as either transmitter or receiver. However, the master device determines which mode is activated ...
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... Stop condition. 4.1.7 TIME OUT (MCP98242) If the SCLK stays low or high for time specified by t the MCP98242 temperature sensor resets the serial interface. This dictates the minimum clock speed as specified in the SMBus specification. However, the EEPROM does not reset the serial interface. ...
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... MCP98242 5.0 FUNCTIONAL DESCRIPTION The MCP98242 temperature sensors consists of a band-gap type temperature sensor, a Delta-Sigma Ana- log-to-Digital Converter (ΣΔ ADC), user-programmable Temperature Sensor Hysteresis Shutdown Critical Trip Lock Alarm Win. Lock Bit Clear Event Event Status Output Control Critical Event only ...
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... If temperature drifts beyond the user-specified limits, the MCP98242 outputs a signal using the Event pin (refer to Section 5.2.3 “Event Output Configuration”). In addition, the Critical Temperature Trip register is used to provide an additional critical temperature limit. REGISTER 5-1: REGISTER POINTER (WRITE ONLY) ...
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... MCP98242 TABLE 5-1: BIT ASSIGNMENT SUMMARY FOR ALL REGISTERS (SEE SECTION 5.4) Register MSB/ Pointer LSB 7 6 (Hex) 0x00 MSB 0 0 LSB 0 0 0x01 MSB 0 0 LSB Crt Loc Win Loc 0x02 MSB LSB 2 °C 2 °C 0x03 MSB LSB 2 °C 2 °C ...
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... CAPABILITY REGISTER This is a read-only register used to identify the temperature sensor capability. In this case, the MCP98242 is capable of providing temperature at 0.25°C resolution, measuring temperature below and above 0°C, providing ±1°C and ±2°C accuracy over the active and monitor temperature ranges (respectively) and providing user-programmable temperature event boundary trip limits ...
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... A A SDA Address Byte MCP98242 SCLK A A SDA Address Byte FIGURE 5-2: Timing Diagram for Reading the Capability Register (See Section 4.0 “Serial Communication”). DS21996B-page Capability Pointer MCP98242 MSB Data Master MCP98242 LSB Data Master © 2008 Microchip Technology Inc. ...
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... SENSOR CONFIGURATION REGISTER (CONFIG) The MCP98242 has a 16-bit Configuration register (CONFIG) that allows the user to set various functions for a robust temperature monitoring system. Bits 10 thru 0 are used to select Event output boundary hysteresis, device Shutdown or Low-Power mode, temperature boundary and critical temperature lock, temperature Event output enable/disable ...
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... MCP98242 CONFIGURATION REGISTER (CONFIG) → ADDRESS ‘0000 0001’b REGISTER 5-3: bit 6 T and T UPPER LOWER 0 = Unlocked. T UPPER 1 = Locked. T UPPER When enabled, this bit remains set ‘1’ or locked until cleared by internal reset (Section 5.4 “Summary of Temperature Sensor Power-on Default”). This bit does not require a double-write. ...
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... Microchip Technology Inc Configuration Pointer MCP98242 MCP98242 MSB Data MCP98242 Configuration Pointer MCP98242 MCP98242 MSB Data Master MCP98242 MCP98242 LSB Data MCP98242 Note not necessary to select the register pointer if it was set from the previous read/write LSB Data Master DS21996B-page 17 ...
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... If this feature is enabled (Section 5.1.2 “Sensor Configuration Register (CONFIG)”) and the ambient temperature exceeds the specified boundary or window, the MCP98242 asserts an Event output. (Refer to Section 5.2.3 “Event Configuration”). ...
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... UPPER MCP98242 MCP98242 MSB Data MCP98242 Pointer UPPER MCP98242 MCP98242 MSB Data Master MCP98242 MCP98242 LSB Data MCP98242 Note not necessary to select the register pointer if it was set from the previous read/write LSB Data Master Register (See Section 4.0 UPPER DS21996B-page 19 ...
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... AMBIENT TEMPERATURE REGISTER ( The MCP98242 uses a band gap temperature sensor circuit to output analog voltage proportional to absolute temperature. An internal ΔΣ ADC is used to convert the analog voltage to a digital word. The converter resolution is set to 0.25 °C + sign (11-bit data). The digital word is loaded to a 16-bit read-only Ambient ...
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... Timing Diagram for Reading +25.25°C Temperature from the T Section 4.0 “Serial Communication”). © 2008 Microchip Technology Inc Pointer A MCP98242 MSB Data Master MCP98242 MCP98242 Note not necessary to select the register pointer if it was set from the previous read/write LSB Data Master Register (See A DS21996B-page 21 ...
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... MCP98242 5.1.5 MANUFACTURER ID REGISTER This register is used to identify the manufacturer of the device in order to perform manufacturer specific operation. The Manufacturer ID for the MCP98242 is 0x0054 (hexadecimal). MANUFACTURER ID REGISTER (READ-ONLY) → ADDRESS ‘0000 0110’b REGISTER 5-6: R-0 R-0 R-0 bit 15 R-0 R-1 R-0 ...
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... The upper byte of this register is used to specify the device identification and the lower byte is used to specify device revision. The device ID for the MCP98242 is 0x20 (hex). The revision begins with 0x00 (hex) for the first release, with the number being incremented as revised versions are released. DEVICE ID AND DEVICE REVISION (READ-ONLY) → ...
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... U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared = 30 ms typ typ.) CONV = 130 ms typ.) CONV = 260 ms typ.) CONV Resolution Pointer MCP98242 MCP98242 Resolution to 0.0625°C <0000 0011>b (See A U-0 R/W-0 R/W-0 — Resolution bit Bit is unknown Data MCP98242 © 2008 Microchip Technology Inc. ...
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... Temperature Resolution The MCP98242 is capable of providing a temperature data with 0.5°C to 0.0625°C resolution. The Resolution can selected using the Resolution register (Register 5- temperate 8) which is located in address ‘00001000’b. This address location is not specified in JEDEC Standard JC42 ...
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... MCP98242 T CRIT T UPPER LOWER Comparator Interrupt S/w Int. Clear Critical Only Note: 1 Event Output Boundary Note Conditions ≥ LOWER < LOWER HYST > UPPER ≤ UPPER HYST ≥ CRIT < CRIT HYST ≥ When T and T A CRIT CONFIG (Event output mode) is ignored. FIGURE 5-9: Event Output Condition ...
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... EEPROM FEATURE DESCRIPTION 5.3.1 BYTE WRITE To write a byte in the MCP98242 EEPROM, the master has to specify the memory location or address. Once the address byte is transmitted correctly followed by a word address, the word address is stored in the EEPROM address pointer. The following byte is data to be stored in the specified memory location ...
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... PAGE WRITE The write Address Byte, word address and the first data byte are transmitted to the MCP98242 in the same way byte write. Instead of generating a Stop condi- tion, the master transmits additional data bytes to the MCP98242, which are temporarily stored in the on-chip page buffer and will be written into the memory after the master has transmitted a Stop condition ...
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... WRITE PROTECTION The MCP98242 has a Software Write-Protect (SWP) feature that allows the lower half array (addresses 00h - 7Fh write-protected or permanently write- protected (PWP). The write protected area can be cleared by sending Clear Write Protect (CWP) command. However, once the PWP is executed the protected memory can not be cleared ...
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... MCP98242 at A1 pin, connect A2 pin to GND to initiate CWP cycle. DD needs to be applied to the A0 pin and Table 5-3. Both A2 and A1 pins are Table Data MCP98242 needs to be applied to the A0 pin and and the corresponding slave DD Table 5-4 and Data MCP98242 © 2008 Microchip Technology Inc. ...
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... A0 pin to execute PWP. The state of A2, A1, and A0 is user selectable. However, the address pin states need to match the slave address bits, as shown in Table 5-4 and Word Address MCP98242 MCP98242 is not applied on the A0 pin to execute PWP. HI_WP MCP98242 is not applied on the HI_WP Table 5- Data MCP98242 DS21996B-page 31 ...
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... Upon receipt of the slave address with R/W bit set to ‘1’, the MCP98242 issues an acknowledge and transmits the 8-bit data 1 2 SCLK SDA S ...
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... Microchip Technology Inc. set. The master then issues the Address Byte again, but with the R/W bit set to a ‘1’. The MCP98242 then issues an acknowledge and transmits the 8-bit data word. The master will not acknowledge the transfer but ...
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... Sequential reads are initiated in the same way as a random read, with the exception that after the MCP98242 transmits the first data byte, the master issues an acknowledge, as opposed to a stop condition in a random read. This directs the MCP98242 to transmit the next sequentially addressed 8-bit word (Figure 5-17). ...
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... Summary of Temperature Sensor Power-on Default The MCP98242 temperature sensor has an internal Power-on Reset (POR) circuit. If the power supply voltage V glitches down to the V DD POR device resets the registers to the power-on default settings. Table 5-6 shows the power-on default summary. TABLE 5-6: ...
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... SDA and SCLK lines. Although SMBus specifications only require the SDA and SCLK lines to pull-down 350 µA, with a maximum voltage drop of 0.4 V, the MCP98242 is designed to meet a maximum voltage drop of 0.4 V, with current. This allows lower pull-up resistor values to be used, allowing the MCP98242 to handle higher bus capacitance ...
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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. © 2008 Microchip Technology Inc. MCP98242 : Example ABJ 805 56 ...
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... MCP98242 D N NOTE TOP VIEW A3 DS21996B-page EXPOSED PAD BOTTOM VIEW A NOTE NOTE © 2008 Microchip Technology Inc. ...
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... Microchip Technology Inc. MCP98242 DS21996B-page 39 ...
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... MCP98242 DS21996B-page 40 © 2008 Microchip Technology Inc. ...
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... Microchip Technology Inc. MCP98242 DS21996B-page 41 ...
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... MCP98242 D N NOTE DS21996B-page φ L © 2008 Microchip Technology Inc. ...
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... APPENDIX A: REVISION HISTORY Revision B (February 2008) The following is the list of modifications: 1. Added TDFN package throughout document. Revision A (September 2006) • Original Release of this Document. © 2008 Microchip Technology Inc. MCP98242 DS21996B-page 43 ...
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... MCP98242 NOTES: DS21996B-page 44 © 2008 Microchip Technology Inc. ...
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... To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office PART NO. –X X Device Grade Temperature Range Device: MCP98242: Digital Temperature Sensor MCP98242T: Digital Temperature Sensor (Tape and Reel) Grade ±1°C (max.) from +75°C to +95°C, B ±2°C (max.) from +40°C to +125°C, and B ± ...
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... MCP98242 NOTES: DS21996B-page 46 © 2008 Microchip Technology Inc. ...
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... PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, UNI/O, WiperLock and ZENA 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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