SMBus Temperature Sensor

EMC1001 1.5°C SMBus Temperature Sensor in Miniature SOT-23 PRODUCT FEATURES General Description The EMC1001 is a tiny SMBus temperature sensor with ±1.5°C accuracy and two interrupts. Packaged in a SOT23-6, the EMC1001 provides an accurate, low-cost, low-current, solution for critical temperature monitoring in a PC or embedded applications. The EMC1001 generates two separate interrupts with programmable thermal trip points. The THERM output operates as a thermostat with programmable threshold and hysteresis. The ALERT output can be configured as a maskable SMBus alert with programmable window comparator limits, or as a second THERM output. An efficient fan control system can be created since this output may be used to control a fan. A power down mode extends battery life in portable applications. Each part number may be configured to respond to one of four separate SMBus addresses. Datasheet Features Self Contained Internal Temperature Sensor — 0.25°C resolution — ±1.5°C Accuracy 40°C to 85°C Small 6-lead SOT lead-free RoHS compliant packages SMBus address selected by external resistor — Select 1 of 4 per package, 8 addresses available Maskable Interrupt using ALERT One-shot Command during standby Low Power, 3.0V to 3.6V Supply — 47uA at 0.0625 Conversions per Second (Typical) — 4.8uA in Standby (Typical) SMBus 2.0 Compliant interface Programmable temperature conversion rate Applications Desktop and Notebook Computers Thermostats Smart batteries Industrial/Automotive Other Electronic Systems Simplified Block Diagram EMC1001 Address Pointer Register Switching Current Limit Comparator Conversion Rate Register High Limit Registers Digital Mux Low Limit Registers THERM Limit Register THERM Hysteresis Register Configuration Register Status Register Interrupt Masking SMBus Interface Internal Temp Diode 10-bit delta-sigma ADC Temperature Register SMCLK SMDATA ALERT THERM SMSC EMC1001 DATASHEET Revision 1.6 (01-29-07) 1.5°C SMBus Temperature Sensor in Miniature SOT-23 Datasheet Order Number(s): EMC1001-AFZQ-TR for 6 pin, SOT 23 Lead-Free RoHS compliant package (tape and reel) EMC1001-1-AFZQ-TR for 6 pin, SOT 23 Lead-Free RoHS compliant package (alternate addresses, tape and reel) See Table 1.2, "SMBus Address Configuration Information," on page 3 Reel size is 8,000 pieces. 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2007 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. 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Revision 1.6 (01-29-07) 2 SMSC EMC1001 DATASHEET 1.5°C SMBus Temperature Sensor in Miniature SOT-23 Datasheet Chapter 1 Pin Configuration ADDR/THERM GND VDD 1 2 3 6 5 4 SMDATA ALERT/THERM2 SMCLK Figure 1.1 EMC1001 Pin Configuration Table 1.1 Pin Description PIN ADDR/THERM PIN NO. 1 DESCRIPTION Logic output that can be used to turn on/off a fan or throttle a CPU clock in the event of an over-temperature condition. This is an open-drain output. This pin is sampled following power up and the value of the pull up resistor determines the SMBus slave address per Table 1.2.Total capacitance on this pin must not exceed 100 pF, and the pull-up resistor must be connected to the same supply voltage as VDD Ground. Supply Voltage, 3.0V to 3.6V. SMBus clock input. Logic output used as interrupt, SMBus alert or as a second THERM output. This is an open-drain output. SMBus data input/output, open drain output. GND VDD SMCLK ALERT/THERM2 2 3 4 5 6 SMDATA Table 1.2 SMBus Address Configuration Information ADDR/THERM PULL-UP RESISTOR 7.5kΩ ±5% Note 1.1, Note 1.2 12kΩ ±5% Note 1.2 20kΩ ±5% Note 1.2 33kΩ ±5% Note 1.2 EMC1001-1 7.5kΩ ±5% Note 1.1, Note 1.2 12kΩ ±5% Note 1.2 20kΩ ±5% Note 1.2 33kΩ ±5% Note 1.2 Note 1.1 Note 1.2 SMBUS ADDRESS 1001 000b 1001 001b 0111 000b 0111 001b 1001 010b 1001 011b 0111 010b 0111 011b PACKAGE DESCRIPTION 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 6-Lead SOT-23 PART NUMBER EMC1001 This value must be greater than 1kΩ ±5% and less than or equal to 7.5kΩ ±5%. The pull-up resistor must be connected to VDD (pin 1), and the total capacitance on this pin must be less than 100pF. SMSC EMC1001 3 Revision 1.6 (01-29-07) DATASHEET 1.5°C SMBus Temperature Sensor in Miniature SOT-23 Datasheet Table 1.3 Absolute Maximum Ratings PARAMETER Supply Voltage VDD Voltage on ALERT/THERM2, SMDATA and SMCLK pins Voltage on any other pin Operating Temperature Range Storage Temperature Range Lead Temperature Range Package Thermal Characteristics for SOT23-6 Power Dissipation Thermal Resistance ESD Rating, All Pins (Human Body Model) TBD 111.5 2000 mW @ 70oC o RATING -0.3 to 5.0 -0.3 to 5.5 -0.3 to VDD+0.3 -25 to +125 -55 to +150 Refer to JEDEC Spec. J-STD-020 V V V °C °C UNIT C/W V Note: Stresses above those listed could cause damage to the device. This is a stress rating only and functional operation of the device at any other condition above those indicated in the operation sections of this specification is not implied. When powering this device from laboratory or system power supplies, it is important that the Absolute Maximum Ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on their outputs when the AC power is switched on or off. In addition, voltage transients on the AC power line may appear on the DC output. If this possibility exists, it is suggested that a clamp circuit be used. Revision 1.6 (01-29-07) 4 SMSC EMC1001 DATASHEET 1.5°C SMBus Temperature Sensor in Miniature SOT-23 Datasheet Chapter 2 Electrical Characteristics Table 2.1 Electrical Characteristics VDD=3.0V to 3.6V, TA= -25°C to +125°C, Typical values at TA = 27°C unless otherwise noted PARAMETER DC Power Supply Voltage Average Operating Current SYMBOL MIN TYP MAX UNITS CONDITIONS VDD IDD 3.0 3.3 47 3.6 TBD V μA 0.0625 conversion/s See Table 4.6, "Conversion Rates," on page 14 Standby mode IPD Temperature Measurement Accuracy 4.8 10 μA ±0.5 ±1 ±1.5 ±3 °C °C °C ms 40°C≤TA≤85°C -25°C≤TA≤125°C Resolution Conversion Time Voltage Tolerance Voltage at pin (ADDR/THERM, ) Voltage at pin (ALERT/THERM2, SMDATA,SMCLK) VTOL VTOL -0.3 -0.3 0.25 26 3.6 5.5 V V Digital Outputs (ADDR/THERM, ALERT/THERM2) Output Low Voltage High Level Leakage Current SMBus Interface (SMDATA,SMCLK) Input High Level Input Low Level Input High/Low Current Hysteresis Input Capacitance Output Low Sink Current SMBus Timing Clock Frequency Spike Suppression FSMB 10 400 50 kHz ns 6 VIH VIL IIH/IIL -1 500 5 2.0 0.8 1 V V μA mV pF mA SMDATA = 0.6V VOL IOH 0.1 0.4 1 V μA IOUT=-4mA VOUT=VDD SMSC EMC1001 5 Revision 1.6 (01-29-07) DATASHEET 1.5°C SMBus Temperature Sensor in Miniature SOT-23 Datasheet Table 2.1 Electrical Characteristics (continued) VDD=3.0V to 3.6V, TA= -25°C to +125°C, Typical values at TA = 27°C unless otherwise noted PARAMETER Bus free time Start to Stop Hold time Start Setup time Start Setup time Stop Data Hold Time Data Setup Time Clock Low Period Clock High Period Clock/Data Fall Time Clock/Data Rise Time SYMBOL TBUF THD:STA TSU:STA TSU:STO THD:DAT TSU:DAT TLOW THIGH TF TR MIN 1.3 0.6 0.6 0.6 0.3 100 1.3 0.6 * * TYP MAX UNITS μs μs μs μs μs ns μs μs CONDITIONS 300 300 Note 2.1 400 ns ns *Min = 20+0.1Cb ns *Min