EMC1423-1-AIZL-TR SMSC, EMC1423-1-AIZL-TR Datasheet
EMC1423-1-AIZL-TR
Specifications of EMC1423-1-AIZL-TR
Available stocks
Related parts for EMC1423-1-AIZL-TR
EMC1423-1-AIZL-TR Summary of contents
Page 1
... PRODUCT FEATURES General Description The EMC1423 and EMC1424 are high accuracy, low cost, System Management Bus (SMBus) temperature sensors. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to support CPU diodes requiring the BJT/transistor model including 45nm, 65nm and 90nm processors) and automatic ...
Page 2
... EMC1423-1-AIZL-TR FOR 10-PIN, MSOP LEAD-FREE ROHS COMPLIANT PACKAGE EMC1424-1-AIZL-TR FOR 10-PIN, MSOP LEAD-FREE ROHS COMPLIANT PACKAGE Note: See Table 1.1, "Part Selection" 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2009 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 ...
Page 3
... Temperature Data Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 6.3 Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 6.4 Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.5 Conversion Rate Register 6.6 Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6.7 Scratchpad Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 6.8 Therm Limit Registers 6.9 External Diode Fault Register 6.10 Software Thermal Shutdown Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 SMSC EMC1423/EMC1424 3 DATASHEET Revision 1.36 (07-02-09) ...
Page 4
... Filter Control Register 6.20 Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 6.21 SMSC ID Register (FEh 6.22 Revision Register (FFh Chapter 7 Typical Operating Curves Chapter 8 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 8.1 Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Chapter 9 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Revision 1.36 (07-02-09) 1°C Temperature Sensor with Hardware Thermal Shutdown 4 DATASHEET Datasheet SMSC EMC1423/EMC1424 ...
Page 5
... Temperature Sensor with Hardware Thermal Shutdown Datasheet List of Figures Figure 2.1 EMC1423/EMC1424 Pin Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 4.1 SMBus Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 5.1 System Diagram for EMC1423 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 5.2 System Diagram for EMC1424 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 5.3 Block Diagram of Hardware Thermal Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 5.4 Isolating ALERT and SYS_SHDN Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 5 ...
Page 6
... Table 4.4 Send Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 4.5 Receive Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 4.6 Alert Response Address Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 5.1 Supply Current vs. Conversion Rate for EMC1423 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 5.2 Supply Current vs. Conversion Rate for EMC1424 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 5.3 SYS_SHDN Threshold Temperature Table 5.4 Temperature Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Table 6 ...
Page 7
... Switching Current DP1 DN1 Analog DP2 ΔΣ ADC Mux Anti-parallel diodes DN2 Internal Temp Diode 1.1 Part Selection The EMC1423 and EMC1424 device configuration is highlighted below. PART SMBUS EXTERNAL NUMBER ADDRESS DIODES EMC1423 - 1 100_1100b 2 SMSC EMC1423/EMC1424 V DD EMC1423 / EMC1424 External ...
Page 8
... Fixed 2N3904 in anti- Detect Diode w/ REC parallel diode configu- enabled ration Note 1.1 8 DATASHEET Datasheet PRODUCT OTHER ID Software program- mable and mask- able High Limits Software program- mable and mask- able SYS_SHDN 27h Limits Hardware set SYS_SHDN Limit on External Diode 1 SMSC EMC1423/EMC1424 ...
Page 9
... Temperature Sensor with Hardware Thermal Shutdown Datasheet Chapter 2 Pin Description DP2 / DN3 DN2 / DP3 Figure 2.1 EMC1423/EMC1424 Pin Diagram Table 2.1 EMC1423 and EMC1424 Pin Description PIN NUMBER NAME 1 VDD DP1 2 DN1 3 DP2 / DN3 4 DN2/ DP3 5 6 GND SYS_SHDN 7 ALERT ...
Page 10
... Power - these pins are used to supply either VDD or GND to the device. AIO - Analog Input / Output Digital Input Open Drain Digital Output. DIOD - Digital Input / Open Drain Output. Revision 1.36 (07-02-09) 1°C Temperature Sensor with Hardware Thermal Shutdown 10 DATASHEET Datasheet SMSC EMC1423/EMC1424 ...
Page 11
... DC output. If this possibility exists suggested that a clamp circuit be used. Note 3.1 For the 5V tolerant pins that have a pull-up resistor (SMCLK, SMDATA, SYS_SHDN, and ALERT), the pull-up voltage must not exceed 3.6V when the device is unpowered. SMSC EMC1423/EMC1424 Table 3.1 Absolute Maximum Ratings ) - V |) (see Note 3 ...
Page 12
... A +20°C < T < +110°C DIODE 0°C < T < 100°C A -40°C < T < 127°C DIODE EMC1423, default settings EMC1424, default settings Connected across external diode I = 8mA SINK ALERT and SYS_SHDN pins Device powered or unpowered T < 85°C A pull-up voltage < 3.6V Temp selection read Note 3 ...
Page 13
... HD:DAT Data Setup Time t SU:DAT Clock Low Period t LOW Clock High Period t HIGH Clock/Data Fall time t FALL Clock/Data Rise time t RISE Capacitive Load C LOAD SMSC EMC1423/EMC1424 = 27°C unless otherwise noted. A MIN TYP MAX UNITS SMBus Interface 2 Tolerant DD -0.3 0 Tolerant ±5 uA Powered or unpowered TA < ...
Page 14
... Chapter 4 System Management Bus Interface Protocol 4.1 System Management Bus Interface Protocol The EMC1423 and EMC1424 communicate with a host controller, such as an SMSC SIO, through the SMBus. The SMBus is a two-wire serial communication protocol between a computer host and its peripheral devices. A detailed timing diagram is shown in For the first 15ms after power-up the device may not respond to SMBus communications ...
Page 15
... When it detects that the ALERT pin is asserted, the host will send the Alert Response Address (ARA) to the general address of 0001_100xb. All devices with active interrupts will respond with their client address as shown in SMSC EMC1423/EMC1424 Table 4.2 Write Byte Protocol REGISTER ACK ...
Page 16
... Note: Other addresses are available. Contact SMSC for more information. 4.8 SMBus Timeout The EMC1423 and EMC1424 support SMBus Timeout. If the clock line is held low for longer than 30ms, the device will reset its SMBus protocol. This function can be enabled by setting the TIMEOUT bit in the Consecutive Alert Register (see Revision 1.36 (07-02-09) 1° ...
Page 17
... The EMC1423 and EMC1424 have two levels of monitoring. The first provides a maskable ALERT signal to the host when measured temperatures meet or exceed user programmable limits. This allows the EMC1423 or EMC1424 to be used as an independent thermal watchdog to warn the host of temperature hot spots without direct control by the host. ...
Page 18
... Figure 5.2 System Diagram for EMC1424 5.0.1 Conversion Rates The EMC1423 and EMC1424 may be configured for different conversion rates based on the system requirements. The conversion rate is configured as described in rate is 4 conversions per second. Other available conversion rates are shown in 5.0.2 ...
Page 19
... Temperature Sensor with Hardware Thermal Shutdown Datasheet Table 5.1 Supply Current vs. Conversion Rate for EMC1423 (continued) ENABLED CONVERSION RATE (DEFAULT sec 64 / sec When enabled, the dynamic averaging will affect the average supply current based on the chosen conversion rate as shown in Table 5.2 Supply Current vs. Conversion Rate for EMC1424 ...
Page 20
... DATASHEET Datasheet SMBus Traffic 3.3V SYS_SHDN 22K OHM 33K OHM ±10% ±10% 101°C 107°C 102°C 108°C 103°C 109°C 104°C 110°C 105°C 111°C 106°C 112°C SMSC EMC1423/EMC1424 ...
Page 21
... Thermal Shutdown Limit will not be decoded properly. If the system requirements do not permit these conditions, then the ALERT and SYS_SHDN pins must be isolated from their respective busses during this time. One method of isolating this pin is shown in SMSC EMC1423/EMC1424 Section 6.4). Figure 5.4. ...
Page 22
... Programmable External Diode Ideality Factor The EMC1423 and EMC1424 do not support a programmable Ideality Factor for the External Diode 1 channel hard-wired for an ideality factor of 1.008. The EMC1423 External Diode 2 channel defaults to measuring external diodes with an ideality factor of 1 ...
Page 23
... Diode Faults The EMC1423 and EMC1424 detect an open on the DP and DN pins, and a short across the DP and DN pins. For each temperature measurement made, the device checks for a diode fault on the external diode channel(s). When a diode fault is detected, the ALERT pin asserts (unless masked, see Section 5 ...
Page 24
... Disabled Figure 5.5 Temperature Filter Step Response Figure 5.6 Temperature Filter Impulse Response Revision 1.36 (07-02-09) 1°C Temperature Sensor with Hardware Thermal Shutdown Filter Step Response Level1 Level2 Samples Filter Impulse Response Disabled Level1 Samples 24 DATASHEET Datasheet Level2 SMSC EMC1423/EMC1424 ...
Page 25
... All other bits of the low byte register are set to zero. The EMC1423 and EMC1424 have two selectable temperature ranges. The default range is from 0°C to +127°C and the temperature is represented as binary number able to report a temperature from 0°C to +127.875° ...
Page 26
... External Diode Connections The EMC1423 is hard-wired to measure a specific type of thermal diode on the External Diode 1 channel only (DP1 and DN1 pins). The External Diode 2 channel can be configured to measure a CPU substrate transistor, a discrete thermal diode such as a 2N3904 AMD processor diode. The ...
Page 27
... Temperature Sensor with Hardware Thermal Shutdown Datasheet Local Ground Typical remote substrate transistor i.e. CPU substrate PNP SMSC EMC1423/EMC1424 Typical remote discrete PNP transistor discrete NPN transistor i.e. 2N3906 Figure 5.8 Diode Configurations 27 DATASHEET Typical remote i.e. 2N3904 Revision 1.36 (07-02-09) ...
Page 28
... Controls the conversion rate for updating temperature data (mirrored at address 04h) 28 DATASHEET Datasheet DEFAULT VALUE PAGE 00h Page 31 00h 00h Page 31 00h Page 32 06h Page 33 (4/sec) 55h (85°C) 00h (0°C) Page 34 55h (85°C) 00h (0°C) 00h Page 32 06h Page 33 (4/sec) SMSC EMC1423/EMC1424 ...
Page 29
... Hardware Thermal 1Eh R Shutdown Limit Channel Mask 1Fh R/W Register SMSC EMC1423/EMC1424 FUNCTION Stores the 8-bit high limit for the Internal Diode (mirrored at address 05h) Stores the 8-bit low limit for the Internal Diode (mirrored at address 06h) Stores the integer portion of the ...
Page 30
... Page 31 00h 08h or 07h Page 40 12h Page 41 (1.008) 00h Page 31 00h Page 31 00h 55h (85°C) 00h (0°C) Page 34 00h 00h 55h Page 35 (85°C) 12h Page 41 (1.008) 00h Page 42 00h Page 43 00h Page 43 00h Page 44 Table 6.26 Page 44 SMSC EMC1423/EMC1424 ...
Page 31
... MSBits. 6.3 Status Register ADDR R/W REGISTER B7 02h R Status BUSY SMSC EMC1423/EMC1424 FUNCTION Stores a fixed value that represents SMSC Stores a fixed value that represents the revision number Table 6.2 Temperature Data Registers ...
Page 32
... Table 6.4 Configuration Register ALERT RECD2 COMP Section 5.4). 32 DATASHEET Datasheet Section 6.9, (Section 6.16). When set, this bit (Section 6.17). When set, this (Section 6.9). When (Section 6.18 DEFAULT DAVG_ - RANGE DIS APDD 5.3. Section 5.3.2. In this mode the SMSC EMC1423/EMC1424 00h ...
Page 33
... The Conversion Rate Register controls how often the temperature measurement channels are updated and compared against the limits. This register is fully accessible at either address. Bits 3-0 - CONV[3:0] - Determines the conversion rate as shown in CONV[3:0] HEX SMSC EMC1423/EMC1424 Table 5.1 and Table 6.5 Conversion Rate Register Table 6.6 Conversion Rate ...
Page 34
... DATASHEET Datasheet DEFAULT 55h (85°C) 00h (0°C) 55h (85° 00h 00h (0° 00h 55h (85°C) 00h (0° 00h - - - - 00h 55h (85°C) 00h (0°C) SMSC EMC1423/EMC1424 ...
Page 35
... Therm Limit Registers ADDR. R/W REGISTER External 19h R/W Diode 1 THERM Limit External 1Ah R/W Diode 2 THERM Limit Internal Diode 20h R/W THERM Limit THERM 21h R/W Hysteresis SMSC EMC1423/EMC1424 0.5 0.25 0.125 - - 0.5 0.25 0.125 - - Table 6.8 Scratchpad Register ...
Page 36
... Revision 1.36 (07-02-09) 1°C Temperature Sensor with Hardware Thermal Shutdown Table 6.9 Therm Limit Registers (continued 128 Table 6.10 External Diode Fault Register E3FLT E3SYS 36 DATASHEET Datasheet DEFAULT 55h (85° DEFAULT E2FLT E1FLT - 00h DEFAULT E2SYS ESYS INTSYS SMSC EMC1423/EMC1424 00h ...
Page 37
... ALERT pin will not be asserted when the masked channel reads a diode fault or out of limit error. The channel mask does not mask the SYS_SHDN pin. Bit 3 - E3MASK - Masks the ALERT pin from asserting when the External Diode 3 channel is out of limit or reports a diode fault. SMSC EMC1423/EMC1424 ...
Page 38
... It will remain set until the temperature drops below the High Limit minus the THERM Hysteresis value. For example, if the CALRT[2:0] bits are set for 4 consecutive alerts on an EMC1423 device, the high limits are set at 70°C, and none of the channels are masked, then the ALERT pin will be asserted after the following four measurements: 1. Internal Diode reads 71° ...
Page 39
... The bits are decoded as shown in consecutive out of limit conversion. Table 6.15 Consecutive Alert / THERM Settings SMSC EMC1423/EMC1424 Table 6.15. The default setting is 4 consecutive out of limit NUMBER OF CONSECUTIVE OUT OF LIMIT 0 MEASUREMENTS 0 (default for CALRT[2:0 (default for CTHRM[2:0]) 39 ...
Page 40
... Temperature Sensor with Hardware Thermal Shutdown Table 6.16 Beta Configuration Registers ENABLE2 Table 6.17 CPU Beta Values BETAX[2: DATASHEET Datasheet DEFAULT 08h for EMC1423 BETA2[2:0] or 07h for EMC1424 0 MINIMUM BETA 0 0.11 1 0.18 0 0.25 1 0.33 0 0.43 1 1.00 0 2.33 1 Disabled X Autodetection SMSC EMC1423/EMC1424 ...
Page 41
... SMSC EMC1423/EMC1424 IDEALITY2[5: IDEALITY3[5:0] SETTING FACTOR 18h 1.0159 19h 1.0172 1Ah 1.0185 1Bh 1.0200 1Ch 1.0212 1Dh 1 ...
Page 42
... SETTING FACTOR 28h 1.0291 29h 1.0304 2Ah 1.0317 2Bh 1.0330 2Ch 1.0343 2Dh 1.0356 2Eh 1.0369 2Fh 1.0382 30h 1.0395 31h 1.0408 32h 1.0421 33h 1.0434 34h 1.0447 35h 1.0460 36h 1.0473 37h 1.0486 DEFAULT E2HIGH E1HIGH IHIGH 00h SMSC EMC1423/EMC1424 ...
Page 43
... THERM bits are cleared. Bit 3 - E3THERM - This bit is set when the External Diode 3 channel exceeds it’s programmed THERM Limit. Bit 2 - E2THERM - This bit is set when the External Diode 2 channel exceeds it’s programmed THERM Limit. SMSC EMC1423/EMC1424 Table 6.22 Low Limit Status Register ...
Page 44
... Table 6.25. See Figure Table 6.25 Filter Settings 0 0 Disabled (default) 1 Level 1 0 Level 1 1 Level 2 Table 6.26 Product ID Register DATASHEET Datasheet DEFAULT - - FILTER[1:0] 00h 5.5and Figure 5.6 for examples on the AVERAGING DEFAULT 23h EMC1423 27h EMC1424 SMSC EMC1423/EMC1424 ...
Page 45
... SMSC ID Register (FEh) ADDR. R/W REGISTER FEh R SMSC ID The Manufacturer ID register contains an 8 bit word that identifies the SMSC as the manufacturer of the EMC1423 and EMC1424. 6.22 Revision Register (FFh) ADDR. R/W REGISTER FFh R Revision The Revision register contains an 8 bit word that identifies the die revision. ...
Page 46
... Typical 65nm CPU from major vendor (TA = 27°C, VDD = 3.3V, BETA = 011 110 125 46 DATASHEET Datasheet = 42.5°C, VDD = 3.3V) DIODE 110 125 Am bient Tem perature (°C) = 470pF) FILT ER Beta Compensation Disabled Beta Compensation Enabled 60 80 100 120 CPU Temperature (°C) SMSC EMC1423/EMC1424 ...
Page 47
... S upply Curre nt vs. Conve rsion Ra te 1200 1100 1000 900 800 700 600 500 400 300 200 Conve rsion Ra te SMSC EMC1423/EMC1424 Tem perature Error vs. Am bient Tem perature 120 2.0 100 1.5 80 1.0 60 0.5 40 0.0 -0.5 20 -1.0 0 200 -1.5 -2.0 ...
Page 48
Chapter 8 Package Information 10X TOP VIEW C SEATING PLANE A1 ccc C SIDE VIEW C GAUGE PLANE 0.25 SEATING PLANE 0° - 8° DETAIL "A" 5 PIN 1 IDENTIFIER AREA ...
Page 49
... All devices will be marked on the first line of the top side with ”1423””or 1424”. On the second line, they will be marked with the appropriate -X number (-1, -2, etc), the Functional Revision “B” and Country Code (CC). SMSC EMC1423/EMC1424 49 DATASHEET Revision 1.36 (07-02-09) ...
Page 50
... Chapter 9 Revision History REVISION LEVEL & DATE SECTION/FIGURE/ENTRY Rev. 1.36 Table 2.1, "EMC1423 and EMC1424 Pin Description" (07-02-09) Table 2.1, "EMC1423 and EMC1424 Pin Description" Table 3.1, "Absolute Maximum Ratings" Table 3.2, "Electrical Specifications" Rev. 1.35 Table 3.1, "Absolute Maximum Ratings" ...