參數(shù)資料
型號(hào)： TCN75
廠商： Microchip Technology Inc.
元件分類： 溫度/濕度傳感器
英文描述： 2-Wire Serial Temperature Sensor and Thermal Monitor(2線串行溫度傳感器和熱監(jiān)控器)
中文描述： 2線串行溫度傳感器和溫度監(jiān)視器（2線串行溫度傳感器和熱監(jiān)控器）
文件頁(yè)數(shù)： 6/18頁(yè)
文件大?。?/td> 468K
代理商： TCN75
TCN75
DS21490B-page 6
2002 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
A typical TCN75 hardware connection is shown in
Figure 3-1.
FIGURE 3-1:
TYPICAL APPLICATION
3.1
Serial Data (SDA)
Bi-directional. Serial data
directions using this pin.
is transferred
in both
3.2
Serial Clock (SCL)
Input. Clocks data into and out of the TCN75.
3.3
INT/CMPTR
Open Collector, Programmable Polarity. In Comparator
mode,
unconditionally
driven
temperature exceeds the value programmed into the
T
SET
register. INT/CMPTR will become inactive when
temperature subsequently falls below the T
HYST
set-
ting. (See Section 5.0, Register Set and Programmer's
Model). In Interrupt mode, INT/CMPTR is also made
active by TEMP exceeding T
SET
; it is unconditionally
RESET to its inactive state by reading any register via
the 2-wire bus. If and when temperature falls below
T
HYST
, INT/CMPTR is again driven active. Reading any
register will clear the T
HYST
interrupt. In Interrupt mode,
the INT/CMPTR output is unconditionally RESET upon
entering Shutdown mode. If programmed as an active-
low output, it can be wire-ORed with any number of
other open collector devices. Most systems will require
a pull-up resistor for this configuration.
active
any
time
Note that current sourced from the pull-up resistor
causes power dissipation and may cause internal heat-
ing of the TCN75. To avoid affecting the accuracy of
ambient temperature readings, the pull-up resistor
should be made as large as possible. INT/CMPTR's
output polarity may be programmed by writing to the
INT/CMPTR POLARITY bit in the CONFIG register.
The default is active low.
3.4
Address (A2, A1, A0)
Inputs. Sets the three Least Significant bits of the
TCN75 8-bit address. A match between the TCN75's
address and the address specified in the serial bit
stream must be made to initiate communication with
the TCN75. Many protocol-compatible devices with
other addresses may share the same 2-wire bus.
3.5
Slave Address
The four Most Significant bits of the Address Byte (A6,
A5, A4, A3) are fixed to 1001[B]. The states of A2, A1
and A0 in the serial bit stream must match the states of
the A2, A1 and A0 address inputs for the TCN75 to
respond with an Acknowledge (indicating the TCN75 is
on the bus and ready to accept data). The Slave
Address is represented in Table 3-1.
3.6
Comparator/Interrupt Modes
INT/CMPTR behaves differently depending on whether
the TCN75 is in Comparator mode or Interrupt mode.
Comparator mode is designed for simple thermostatic
operation. INT/CMPTR will go active anytime TEMP
exceeds T
SET
. When in Comparator mode, INT/
CMPTR will remain active until TEMP falls below
T
HYST
, whereupon it will RESET to its inactive state.
The state of INT/CMPTR is maintained in Shutdown
mode when the TCN75 is in Comparator mode. In
Interrupt
mode,
INT/CMPTR
indefinitely, even if TEMP falls below T
HYST
, until any
register is read via the 2-wire bus. Interrupt mode is
better suited to interrupt driven microprocessor-based
will
remain
active
A0
A1
A2
SDA
SCL
+V
DD
(3V to 5.5V)
Address
(Set as Desired)
I2C
Interface
CBypass
To Controller
0.1μF Recommended
Unless Device is Mounted
Close to CPU
INT/CMPTR
7
6
5
1
2
3
8
4
TCN75
TABLE 3-1:
TCN75 SLAVE ADDRESS
1
0
0
1
A2
A1
A0
MSB
LSBS
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參數(shù)描述
TCN75_13 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2-Wire Serial Temperature Sensor and Thermal Monitor
TCN75-3.3MOA 功能描述:板上安裝溫度傳感器 2-Wire RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
TCN75-3.3MOA713 功能描述:板上安裝溫度傳感器 2-Wire RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
TCN75-3.3MOA713G 功能描述:板上安裝溫度傳感器 2-Wire RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
TCN75-3.3MOAG 功能描述:板上安裝溫度傳感器 2-Wire RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
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