ADT7481ARMZ ON Semiconductor, ADT7481ARMZ Datasheet - Page 3

• Manufacturer Part Number: ADT7481ARMZ
• Description: IC SENSOR TEMP 2CH ALARM 10MSOP
• Manufacturer: ON Semiconductor

Specifications of ADT7481ARMZ

• Function: Temp Monitoring System (Sensor)
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Full Temp Accuracy: +/- 2.5 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Maximum Operating Temperature: + 127 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. Guaranteed by design, not production tested.
2. Time from 10% of SDATA to 90% of SCLK.
3. Time for 10% or 90% of SDATA to 10% of SCLK.
4. Time for 90% of SCLK to 10% of SDATA.
PIN ASSIGNMENT
Pin No.
TIMING SPECIFICATIONS
10
Parameter
1
2
3
4
5
6
7
8
9
(Note 2)
(Note 3)
(Note 4)
t
t
t
t
SU; STO
SU; STA
HD; STA
SU; DAT
f
t
t
SDATA
SCLK
t
HIGH
LOW
BUF
t
t
SCLK
R
F
ALERT/THERM2
Mnemonic
STOP START
THERM
SDATA
SCLK
GND
V
D1+
D1−
D2−
D2+
t
BUF
DD
Limit at T
MIN
400
300
250
(Note 1)
4.7
4.0
1.0
4.7
4.0
4.0
4.7
t
t
LOW
HD;STA
Positive Supply, 3.0 V to 3.6 V.
Positive Connection to the Remote 1 Temperature Sensor.
Negative Connection to the Remote 1 Temperature Sensor.
Open−Drain Output. Requires pullup resistor. Signals overtemperature events, could be used to turn a
fan on/off, or throttle a CPU clock.
Supply Ground Connection.
Negative Connection to the Remote 2 Temperature Sensor.
Positive Connection to the Remote 2 Temperature Sensor.
Open−Drain Logic Output. Used as interrupt or SMBALERT. This may also be configured as a second
THERM output. Requires pullup resistor.
Logic Input/Output, SMBus Serial Data. Open−Drain Output. Requires pullup resistor.
Logic Input, SMBus Serial Clock. Requires pullup resistor.
and T
t
HD;DAT
MAX
t
R
Figure 2. Serial Bus Timing
kHz max
ms max
ns max
ms min
ms min
ms min
ms min
ns min
ms min
ms min
Unit
t
F
t
HIGH
http://onsemi.com
t
SU;DAT
Clock low period, between 10% points
Clock high period, between 90% points
Clock/data rise time
Clock/data fall time
Start condition setup time
Start condition hold time
Data setup time
Stop condition setup time
Bus free time between stop and start conditions
3
Description
START
t
SU;STA
t
HD;STA
Description
t
SU;STO
STOP