TCN75

Features:

` Solid State Temperature Sensing; 2 Accuracy (Typ.)
` Operates from 55 to +125
` Operating Range ..................................... 2.7V - 5.5V
` Programmable Trip Point and Hysteresis with Power-up Defaults
` Standard 2-Wire Serial Interface
` Thermal Event Alarm Output Functions as Interrupt or Comparator / Thermostat Output
` Up to 8 TCN75's May Share the Same Bus
` Shutdown Mode for Low Standby Power Consumption
` Low Power......................... 250mA (Typ.) Operating 1mA (Typ.) Shutdown Mode
` 8-Pin Plastic DIP, SOIC, and MSOP Packaging

Application

· Thermal Protection for High Performance CPU's
· Solid-State Thermometer
· Fire/Heat Alarms
· Thermal Management in Electronic Systems: Computers Telecom Racks Power Supplies / UPS* / Amplifiers
· Copiers / Office Electronics
· Consumer Electronics
· Process Control

Pinout






Specifications

Parameter NameValueTypical Accuracy (°)0.5Max Input/ Supply Current (A)1000Max. Accuracy @ 25° (°)3Temp. Range (°C)-55 to +125Operating Voltage Range (V)+2.7 to +5.5Device DescriptionSerial Output Temp Sensor

Parameter Name	Value
Typical Accuracy (°)	0.5
Max Input/ Supply Current (A)	1000
Max. Accuracy @ 25° (°)	3
Temp. Range (°C)	-55 to +125
Operating Voltage Range (V)	+2.7 to +5.5
Device Description	Serial Output Temp Sensor

Supply Voltage (V_DD) .................................................6.0V
ESD Susceptibility (Note 2) ..................................... (TBD)
Voltage on Any Pin............. (GND 0.3V) to (V_DD + 0.3V)
Operating Temperature Range (T_J) ...... 55°C to +125
Storage Temperature Range (T_STG) ..... 65°C to +150
Lead Temperature (Soldering, 10 sec) ................. +300
Thermal Resistance (Junction to Ambient)
8-Pin DIP ............................................................ 110/W
8-Pin SOIC .......................................................... 170/W
8-Pin MSOP ........................................................ 250//W

*This is a stress rating only and functional operation of this device at these or any other conditions above those indicated in the operations sections of this specification is not implied.

Description

TCN75 is a serially programmable temperature sensor that notifies the host controller when ambient temperature exceeds a user-programmed setpoint. Hysteresis is also programmable. The INT/CMPTR output is programmable as either a simple comparator for thermostat operation or as a temperature event interrupt. Communication with the TCN75 is accomplished via a two-wire bus that is compatible with industry standard protocols. This permits reading the current temperature, programming the setpoint and hysteresis and configuring the device. The TCN75 powers up in Comparator mode with a default setpoint of 80°C with 5°C hysteresis. Defaults allow independent operation as a stand-alone thermostat. A shut-down command may be sent via the 2-wire bus to activate the low-power standby mode. Address selection inputs allow up to eight TCN75's to share the same 2-wire bus for multi-zone monitoring. All registers can be read by the host and the INT/CMPTR output's polarity is user programmable. Both polled and interrupt driven systems are easily accommodated. Small physical size, low installed cost and ease of use make the TCN75 an ideal choice for implementing sophisticated system management schemes.