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| 型号： | MAX6642ATT90+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 7/14页 |
| 文件大小： | 154K |
| 描述： | IC TEMP SENSOR SMBUS 6-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 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 ~ 125°C，0°C ~ 150°C |
| 精确度： | ±3°C（最小值） |
| 拓扑： | ADC，多路复用器，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WDFN 裸露焊盘 |
| 供应商设备封装： | 6-TDFN 裸露焊盘（3x3） |
| 包装： | 标准包装 |
| 产品目录页面： | 1425 (CN2011-ZH PDF) |
| 其它名称： | MAX6642ATT90+TDKR |
register was previously selected by a Write Byte
instruction. Use caution when using the shorter proto-
cols in multimaster systems, as a second master could
overwrite the command byte without informing the first
master.
Read temperature data from the read internal tempera-
ture (00h) and read external temperature (01h) regis-
ters. The temperature data format for these registers is
8 bits for each channel, with the LSB representing +1癈
(Table 1).
Read the additional bits from the read extended tem-
perature byte register (10h, 11h), which extends the
data to 10 bits and the resolution to +0.25癈 per LSB
(Table 2).
When a conversion is complete, the main temperature
register and the extended temperature register are
updated.
Alarm Threshold Registers
Two registers store ALERT threshold valuesone each
for the local and remote channels. If either measured
temperature equals or exceeds the corresponding
ALERT threshold value, the ALERT interrupt asserts
unless the ALERT bit is masked.
The power-on-reset (POR) state of the local ALERT
T
HIGH
register is +70癈 (0100 0110). The POR state of
the remote ALERT T
HIGH
register is +120癈 (0111 1000).
Diode Fault Detection
A continuity fault detector at DXP detects an open cir-
cuit on DXP, or a DXP short to V
CC
or GND. If an open
or short circuit exists, the external temperature register
is loaded with 1111 1111 and status bit 2 (OPEN) of the
status byte is set to 1. Immediately after POR, the status
register indicates that no fault is present. If a fault is
present upon power-up, the fault is not indicated until
the end of the first conversion. Diode faults do not set
the ALERT output.
ALERT Interrupts
The ALERT interrupt occurs when the internal or external
temperature reading exceeds a high temperature limit
(user programmed). The ALERT interrupt output signal is
latched and can be cleared only by reading the status
register after the fault condition no longer exists or by
successfully responding to the alert response address. If
?癈, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
_______________________________________________________________________________________ 7
SMBCLK
A
B
C
D
E F
G
H
I
SMBDATA
t
SU:STA
t
HD:STA
t
LOW
t
HIGH
t
SU:DAT
t
HD:DAT
t
SU:STO
t
BUF
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
E = SLAVE PULLS SMBDATA LINE LOW
J
K
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO MASTER
H = LSB OF DATA CLOCKED INTO MASTER
I = ACKNOWLEDGE CLOCK PULSE
J = STOP CONDITION
K = NEW START CONDITION
Figure 3. SMBus Read Timing Diagram
TEMP (?/SPAN>C)
DIGITAL OUTPUT
130.00
1 000 0010
127.00
0 111 1111
126.00
0 111 1110
25
0 001 1001
0.00
0 000 0000
<0.00
0 000 0000
Diode fault (short or open)
1 111 1111
Table 1. Main Temperature Register
(High Byte) Data Format
FRACTIONAL TEMP (癈)
DIGITAL OUTPUT
0.000
00XX XXXX
0.250
01XX XXXX
0.500
10XX XXXX
0.750
11XX XXXX
Table 2. Extended Resolution
Temperature Register (Low Byte) Data
Format
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6642ATT92 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX6642ATT92+ | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 2-WIRE 6TDFN EP - Rail/Tube |
| MAX6642ATT92+T | 功能描述:板上安装温度传感器 SMBus-Compatible Temperature Sensor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6642ATT92-T | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX6642ATT94+ | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 2-WIRE 6TDFN EP - Rail/Tube |
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