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| 型号： | MAX6649YMUA+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/16页 |
| 文件大小： | 194K |
| 描述： | IC SENSOR REMOTE SMBUS 8UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 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： | -55°C ~ 125°C，外部传感器 |
| 精确度： | ±3°C 本地（最大），±3.2°C 远程（最大） |
| 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： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
+145癈 Precision SMBus-Compatible Remote/
Local Sensors with Overtemperature Alarms
11
Slave Addresses
The MAX6646/MAX6647/MAX6649 have fixed slave
addresses (see Table 9). All devices also respond 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 V
CC
and
clears the memory if V
CC
falls below 2.0V (typ). When
power is first applied and V
CC
rises above 2.0V (typ),
the logic blocks begin operating, although reads and
writes at V
CC
levels below 3V are not recommended. A
second V
CC
comparator, the ADC UVLO comparator,
prevents the ADC from converting until there is sufficient
headroom (V
CC
= 2.7V typ).
Power-Up Defaults
Power-up defaults include:
" Interrupt latch is cleared.
" ADC begins autoconverting at a 4Hz rate.
" Command byte is set to 00h to facilitate quick local
temperature receive byte queries.
" Local (internal) T
HIGH
limit is set to +85癈.
" Local (internal) T
LOW
limit is set to 0癈.
" Remote (external) T
HIGH
limit is set to +85癈
(MAX6649)/+95癈 (MAX6646/MAX6647)
" OVERT (internal) limit is set to +85癈
" OVERT (external) limit is set to +85癈 (MAX6649)/
+125癈 (MAX6646/MAX6647)
DATA
CONVERSION
RATE (Hz)
00h
0.0625
01h
0.125
02h
0.25
03h
0.5
04h
1
05h
2
06h
4
07h
4
08h-FFh
Reserved
Table 8. Conversion-Rate Control Byte
(04h)
BIT
NAME
POR
STATE
FUNCTION
7 (MSB)
BUSY
0
A/D is busy converting when 1.
6
LHIGH
0
Local (internal) high-temperature alarm has tripped when 1; cleared by POR or readout of the
status byte if the fault condition no longer exists.
5
LLOW
0
Local (internal) low-temperature alarm has tripped when 1; cleared by POR or readout of the
status byte if the fault condition no longer exists.
4
RHIGH
0
Remote (external) high-temperature alarm has tripped when 1; cleared by POR or readout of the
status byte if the fault condition no longer exists.
3
RLOW
0
Remote (external) low-temperature alarm has tripped when 1; cleared by POR or readout of the
status byte if the fault condition no longer exists.
2
FAULT
0
A 1 indicates DXN and DXP are either shorted or open; cleared by POR or readout of the status
byte if the fault condition no longer exists.
1
EOT
0
A 1 indicates the remote (external) junction temperature exceeds the external OVERT threshold.
0
IOT
0
A 1 indicates the local (internal) junction temperature exceeds the internal OVERT threshold.
Table 7. Status Register Bit Assignments (02h)
PART
SLAVE ADDRESS
MAX6646
1001 101
MAX6647
1001 110
MAX6649
1001 100
Table 9. Slave Addresses
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX664C/D | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX664CJA | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX664CPA | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX664CPA+ | 功能描述:低压差稳压器 - LDO 5V Prog uPower Voltage Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX664CSA | 功能描述:低压差稳压器 - LDO 5V Prog uPower Voltage Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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