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參數(shù)資料
| 型號(hào)： | MC1066 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Hex Inverter Buffers/Drivers With Open-Collector High-Voltage Outputs 14-CDIP -55 to 125 |
| 中文描述： | 符合ACPI的SMBus溫度傳感器內(nèi)部和外部二極管輸入 |
| 文件頁(yè)數(shù)： | 3/16頁(yè) |
| 文件大?。?/td> | 196K |
| 代理商： | MC1066 |
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MC1066
http://onsemi.com
3
1. INT_TEMP equal to or exceeds INT_HLIM
2. INT_TEMP below INT_LLIM
3. EXT_TEMP equal to or exceeds EXT_HLIM
4. EXT_TEMP below EXT_LLIM
5. External Diode “Open”
The operation of the ALERT output is controlled by the
MASK1 bit in the CONFIG register. If the MASK1 bit is set
to “1,” no interrupts will be generated on ALERT. The
ALERT output is cleared and re–armed by the Alert
Response Address (ARA). This output may be
WIRE–ORed with similar outputs from other SMBus
devices. If the alarm condition persists after the ARA, the
ALERT output will be immediately re–asserted.
(
NOTE:
A pull–up resistor is necessary on ALERT since
it is an open–drain output. Current sourced from the pull–up
resistor causes power dissipation and may cause internal
heating of the MC1066. To avoid affecting the accuracy of
internal temperature readings, the pull–up resistors should
be made as large as possible.)
Normally the COMP output will be asserted upon the
following events:
1. EXT_TEMP equal to or exceeds EXT_HLIM
2. External Diode “Open”
COMP will be de–asserted upon the following event:
EXT_TEMP below EXT_HLIM.
The operation of the COMP output is controlled by the
MASK1 bit in the CONFIG register. If the MASK1 bit is set
to “1,” no interrupts will be generated on COMP. This output
may be WIRE–ORed with similar outputs from other
SMBus devices. Note: A pull–up resistor is necessary on
COMP since it is an open–drain output. Current sourced
from thepull–up resistor causes power dissipation and may
cause internal heating of the MC1066. To avoid affecting the
accuracy of internal temperature readings, the pull–up
resistors should be made as large as possible.
INT_SEL
Input. The operation of Pin 11 is defined by the state of this
pin. There is an internal pull–up to V
DD
. If INT_SEL is high,
Pin 11 will function as ALERT. If INT_SEL is grounded, Pin
11 will function as COMP
.
STBY
Input. The activation of Standby mode may be achieved
using either the STBY pin or the CHIP STOP bit (CONFIG
register). If STBY is pulled low, the MC1066
unconditionally enters its low–power Standby mode (I
DD
=
10
μ
A, max). The temperature–to–digital conversion
process is halted, but ALERT and OS remain functional. The
MC1066’s bus interface remains active, and all registers
may be read from and written to normally. The INT_TEMP
and EXT_TEMP registers will contain whatever data was
valid at the time of Standby. (Transitions on SDA or SCL
due to external bus activity may increase the Standby power
consumption.)
CRIT [1:0]
Inputs. These digital pins determine the temperature
threshold for the CRITICAL setpoint when the 1066 is first
powered up. They must be tied either to Ground or to V
DD
,
or they must be left floating. See the CRITICAL setpoint
decode table for details.
OS
Output. Open Collector, low–true digital output which
asserts when
either
INT_TEMP or EXT_TEMP trips the
CRITICAL setpoint. This interrupt
cannot be masked.
D+
Bi–directional. This pin connects to the anode of the
external diode and is the positive A/D input. Current is
injected into the external diode from the MC1066, and the
temperature proportional V
BE
is measured and converted to
digital temperature data.
D—
Bi–directional. This pin connects to the cathode of the
external diode. Current is sunk from the external diode into
the MC1066 through this pin. It also is the negative input
terminal to the MC1066’s A/D converter. This node is kept
at approximately 0.7V above GROUND.
VDD
Input. Power supply input. See electrical specifications.
GND
Input. Ground return for all MC1066 functions.
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