Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

MAX6642ATT9E-T Datasheet(PDF) 9 Page - Maxim Integrated Products

Part # MAX6642ATT9E-T
Description  SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX6642ATT9E-T Datasheet(HTML) 9 Page - Maxim Integrated Products

Back Button MAX6642ATT9E-T Datasheet HTML 5Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 6Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 7Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 8Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 9Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 10Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 11Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 12Page - Maxim Integrated Products MAX6642ATT9E-T Datasheet HTML 13Page - Maxim Integrated Products Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 14 page
background image
tion rules apply, and the device with the lower address
code wins. The losing device does not generate an
acknowledge and continues to hold the ALERT line low
until cleared. (The conditions for clearing an ALERT
vary depending on the type of slave device.)
Successful completion of the alert response protocol
clears the interrupt latch. If the condition still exists, the
device reasserts the ALERT interrupt at the end of the
next conversion.
Command Byte Functions
The 8-bit command byte register (Table 3) is the master
index that points to the various other registers within the
MAX6642. The register’s POR state is 0000 0000, so a
Receive Byte transmission (a protocol that lacks the
command byte) that occurs immediately after POR
returns the current local temperature data.
Single-Shot
The single-shot command immediately forces a new
conversion cycle to begin. If the single-shot command
is received while the MAX6642 is in standby mode
(RUN bit = 1), a new conversion begins, after which the
device returns to standby mode. If a single-shot con-
version is in progress when a single-shot command is
received, the command is ignored. If a single-shot
command is received in autonomous mode (RUN bit =
0), the command is ignored.
Configuration Byte Functions
The configuration byte register (Table 4) is a read-write
register with several functions. Bit 7 is used to mask
(disable) interrupts. Bit 6 puts the MAX6642 into stand-
by mode (STOP) or autonomous (RUN) mode. Bit 5 dis-
ables local temperature conversions for faster (8Hz)
remote temperature monitoring. Bit 4 prevents setting
the ALERT output until two consecutive measurements
result in fault conditions.
Status Byte Functions
The status byte register (Table 5) indicates which (if
any) temperature thresholds have been exceeded. This
byte also indicates whether the ADC is converting and
whether there is an open-circuit fault detected on the
external sense junction. After POR, the normal state of
all flag bits is zero, assuming no alarm conditions are
present. The status byte is cleared by any successful
read of the status byte after the overtemperature fault
condition no longer exists.
Slave Addresses
The MAX6642 has eight fixed addresses available.
These are shown in Table 6.
The MAX6642 also responds to the SMBus alert
response slave address (see the
Alert Response
Address section).
POR and UVLO
To prevent ambiguous power-supply conditions from
corrupting the data in memory and causing erratic
behavior, a POR voltage detector monitors VCC and
clears the memory if VCC falls below 2.1 (typ). When
power is first applied and VCC rises above 2.1 (typ),
the logic blocks begin operating, although reads and
writes at VCC levels below 3V are not recommended. A
second VCC comparator, the ADC undervoltage lockout
(UVLO) comparator prevents the ADC from converting
until there is sufficient headroom (VCC = +2.7V typ).
Power-Up Defaults
Power-up defaults include:
• ALERT output is cleared.
• ADC begins autoconverting at a 4Hz rate.
• Command byte is set to 00h to facilitate quick
local Receive Byte queries.
• Local (internal) THIGH limit set to +70°C.
• Remote (external) THIGH limit set to +120°C.
Applications Information
Remote-Diode Selection
The MAX6642 can directly measure the die temperature
of CPUs and other ICs that have on-board temperature-
sensing diodes (see the
Typical Operating Circuit) or
they can measure the temperature of a discrete diode-
connected transistor.
Effect of Ideality Factor
The accuracy of the remote temperature measurements
depends on the ideality factor (n) of the remote “diode”
(actually a transistor). The MAX6642 is optimized for n
= 1.008, which is the typical value for the Intel Pentium
±1°C, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
_______________________________________________________________________________________
9
PART NO. SUFFIX
ADDRESS
MAX6642ATT90
1001 000
MAX6642ATT92
1001 001
MAX6642ATT94
1001 010
MAX6642ATT96
1001 011
MAX6642ATT98
1001 100
MAX6642ATT9A
1001 101
MAX6642ATT9C
1001 110
MAX6642ATT9E
1001 111
Table 6. Slave Address


Similar Part No. - MAX6642ATT9E-T

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
MAX6642ATT9E-T MAXIM-MAX6642ATT9E-T Datasheet
221Kb / 13P
   짹1째C, SMBus-Compatible Remote/Local Temperature Sensor with vertemperature Alarm
Rev 0; 8/03
MAX6642ATT9E-T MAXIM-MAX6642ATT9E-T Datasheet
154Kb / 14P
   ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Rev 1; 10/08
MAX6642ATT9E-T MAXIM-MAX6642ATT9E-T Datasheet
218Kb / 14P
   ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Rev 2; 7/09
MAX6642ATT9E-T MAXIM-MAX6642ATT9E-T Datasheet
160Kb / 14P
   ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Rev 3; 10/09
MAX6642ATT9E-T MAXIM-MAX6642ATT9E-T Datasheet
174Kb / 14P
   짹1째C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
2015
More results

Similar Description - MAX6642ATT9E-T

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
MAX6642 MAXIM-MAX6642_V01 Datasheet
174Kb / 14P
   짹1째C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
2015
MAX6642 MAXIM-MAX6642_09 Datasheet
218Kb / 14P
   ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Rev 2; 7/09
MAX6642_0910 MAXIM-MAX6642_0910 Datasheet
160Kb / 14P
   ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Rev 3; 10/09
MAX6642 MAXIM-MAX6642_08 Datasheet
154Kb / 14P
   ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Rev 1; 10/08
MAX6642 MAXIM-MAX6642 Datasheet
221Kb / 13P
   짹1째C, SMBus-Compatible Remote/Local Temperature Sensor with vertemperature Alarm
Rev 0; 8/03
MAX6657 MAXIM-MAX6657 Datasheet
275Kb / 17P
   짹1째C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
Rev 2; 1/02
MAX6648 MAXIM-MAX6648_08 Datasheet
200Kb / 16P
   Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
Rev 4; 6/08
MAX6648 MAXIM-MAX6648 Datasheet
280Kb / 17P
   Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
Rev 1; 10/02
MAX6657 MAXIM-MAX6657_10 Datasheet
170Kb / 16P
   ±1°C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
Rev 5; 10/10
MAX6646 MAXIM-MAX6646 Datasheet
227Kb / 16P
   145째C Precision SMBus-Compatible Remote/ Local Sensors with Overtemperature Alarms
Rev 1; 7/03
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com