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| 型号： | ADT7476AARQZ |
| 厂商： | ON Semiconductor |
| 文件页数： | 62/66页 |
| 文件大小： | 945K |
| 描述： | IC REMOTE THERM CTRLR 5V 24QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi QSOP 24ld Pkg (MSL) Change 17/Jun/2010 Product Discontinuation 30/Sept/2011 |
| 标准包装： | 56 |
| 系列： | dBCool® |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 125°C |
| 精确度： | ±2.5% |
| 拓扑： | ADC，比较器，风扇速度计数器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 管件 |
| 产品目录页面： | 1118 (CN2011-ZH PDF) |
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ADT7476A
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62
Table 82. REGISTER 0x78 CONFIGURATION REGISTER 3 (POWER-ON DEFAULT = 0x00) (Note 1)
Bit No.
Mnemonic
R/W
Description
[0]
ALERT
R/W
ALERT = 1, Pin 10 (PWM2/SMBALERT
) is configured as an SMBALERT
interrupt output to
indicate out-of-limit error conditions.
ALERT = 0, Pin 10 (PWM2/SMBALERT
) is configured as the PWM2 output.
[1]
THERM
/
2.5V
R/W
THERM
= 1 enables THERM
functionality on Pin 22 and Pin 14, if Pin 14 is configured as
THERM
, determined by Bits 0 and 1 (PIN14FUNC) of Configuration Register 4. When THERM
is asserted, if the fans are running and the BOOST bit is set, then the fans run at full speed.
Alternatively, THERM
can be programmed so that a timer is triggered to time how long THERM
has been asserted.
THERM
= 0 enables 2.5V measurement on Pin 22 and disables THERM
. If Bits [5:7] of
Configuration Register 5 are set, THERM
is bidirectional. If they are 0, THERM
is a timer input
only.
Pin14FUNC
THERM
/2.5 V
Pin 22
Pin 14
00
01
10
11
00
01
10
11
0
0
0
0
1
1
1
1
+2.5 V
IN
+2.5 V
IN
+2.5 V
IN
+2.5 V
IN
THERM
+2.5 V
IN
THERM
THERM
TACH4
THERM
SMBALERT
GPIO6
TACH4
THERM
SMBALERT
GPIO6
[2]
BOOST
R/W
When THERM
is an input and BOOST = 1, assertion of THERM
causes all fans to run at the
maximum programmed duty cycle for fail-safe cooling.
[3]
FAST
R/W
FAST = 1 enables fast TACH measurements on all channels. This increases the TACH
measurement rate from once per second to once every 250 ms (4x).
[4]
DC1
R/W
DC1 = 1 enables TACH measurements to be continuously made on TACH1. Fans must be
driven by dc. Setting this bit prevents pulse stretching because it is not required for dc-driven
motors.
[5]
DC2
R/W
DC2 = 1 enables TACH measurements to be continuously made on TACH2. Fans must be
driven by dc. Setting this bit prevents pulse stretching because it is not required for dc-driven
motors.
[6]
DC3
R/W
DC3 = 1 enables TACH measurements to be continuously made on TACH3. Fans must be
driven by dc. Setting this bit prevents pulse stretching because it is not required for dc-driven
motors.
[7]
DC4
R/W
DC4 = 1 enables TACH measurements to be continuously made on TACH4. Fans must be
driven by dc. Setting this bit prevents pulse stretching because it is not required for dc-driven
motors.
1. This register become read-only when the Configuration Register 1 Lock bit is set to 1. Any further attempts to write to to this register have no
effect.
Table 83. REGISTER 0x79 THERM
TIMER STATUS REGISTER (POWER-ON DEFAULT = 0x00)
Bit No.
Mnemonic
R/W
Description
[7:1]
TMR
Read-only
Times how long THERM
input is asserted. These seven bits read 0 until the THERM
assertion time exceeds 45.52 ms.
[0]
ASRT/
TMR0
Read-only
This bit is set high on the assertion of the THERM
input and is cleared on read. If the THERM
assertion time exceeds 45.52 ms, this bit is set and becomes the LSB of the 8-bit TMR
reading. This allows THERM
assertion times from 45.52 ms to 5.82 sec to be reported back
with a resolution of 22.76 ms.
Table 84. REGISTER 0x7A THERM
TIMER LIMIT REGISTER (POWER-ON DEFAULT = 0x00)
Bit No.
Mnemonic
R/W
Description
[7:0]
LIMT
R/W
Sets maximum THERM
assertion length allowed before an interrupt is generated. This is an
8-bit limit with a resolution of 22.76 ms allowing THERM
assertion limits of 45.52 ms to
5.82 sec to be programmed. If the THERM
assertion time exceeds this limit, Bit 5 (F4P) of
Interrupt Status Register 2 (0x42) is set. If the limit value is 0x00, an interrupt is generated
immediately on the assertion of the THERM
input.
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| ADT7476AARQZ-R | 功能描述:板上安装温度传感器 MONITORS 5V/4 FANS 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 |
| ADT7476AARQZ-REEL | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 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，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7476AARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24-QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 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，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
| ADT7476AARQZ-RL7 | 功能描述:板上安装温度传感器 MONITORS 5V/4 FANS 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 |
| ADT7476ARQH | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:dBCOOL Remote Thermal Controller and Voltage Monitor |
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