参数资料
型号: ADT7481ARMZ
厂商: ON Semiconductor
文件页数: 3/20页
文件大小: 237K
描述: IC SENSOR TEMP 2CH ALARM 10MSOP
产品变化通告: MFG CHG Notification ADI to ON Semi
标准包装: 50
功能: 温度监控系统(传感器)
传感器类型: 内部和外部
感应温度: -40°C ~ 120°C,外部传感器
精确度: ±2.5°C(最小值)
拓扑: ADC,比较器,多路复用器,寄存器库
输出类型: SMBus?
输出警报:
输出风扇:
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 120°C
安装类型: 表面贴装
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)
供应商设备封装: 10-MSOP
包装: 管件
其它名称: ADT7481ARMZ-ND
ADT7481ARMZOS
ADT7481
http://onsemi.com
3
Table 3. PIN ASSIGNMENT
Pin No.
Mnemonic
Description
1
V
DD
Positive Supply, 3.0 V to 3.6 V.
2
D1+
Positive Connection to the Remote 1 Temperature Sensor.
3
D1
Negative Connection to the Remote 1 Temperature Sensor.
4
THERM
Open-Drain Output. Requires pullup resistor. Signals overtemperature events, could be used to turn a
fan on/off, or throttle a CPU clock.
5
GND
Supply Ground Connection.
6
D2
Negative Connection to the Remote 2 Temperature Sensor.
7
D2+
Positive Connection to the Remote 2 Temperature Sensor.
8
ALERT
/THERM2
Open-Drain Logic Output. Used as interrupt or SMBALERT
. This may also be configured as a second
THERM
 output. Requires pullup resistor.
9
SDATA
Logic Input/Output, SMBus Serial Data. Open-Drain Output. Requires pullup resistor.
10
SCLK
Logic Input, SMBus Serial Clock. Requires pullup resistor.
Table 4. TIMING SPECIFICATIONS (Note 1)
Parameter
Limit at T
MIN
 and T
MAX
Unit
Description
f
SCLK
400
kHz max
t
LOW
4.7
ms min
Clock Low Period, between 10% Points
t
HIGH
4.0
ms min
Clock High Period, between 90% Points
t
R
1.0
ms max
Clock/data Rise Time
t
F
300
ns max
Clock/data Fall Time
t
SU;
 
STA
4.7
ms min
Start Condition Setup Time
t
HD;
 
STA
(Note 2)
4.0
ms min
Start Condition Hold Time
t
SU;
 
DAT
(Note 3)
250
ns min
Data Setup Time
t
SU;
 
STO
(Note 4)
4.0
ms min
Stop Condition Setup Time
t
BUF
4.7
ms min
Bus Free Time between Stop and Start Conditions
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.
Figure 2. Serial Bus Timing
STOP
START
t
SU; DAT
t
HIGH
t
F
t
HD; DAT
t
R
t
LOW
t
SU; STO
STOP  START
SCLK
SDATA
t
BUF
t
HD; STA
t
HD; STA
t
SU; STA
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