TC07 TELCOM | Alldatasheet
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Technical content
2-11TELCOM SEMICONDUCTOR, INC. TC07 TC07-1 9/18/96
ORDERING INFORMATION
Part No. Package Temp. Range TC07COA 8-Pin SOIC 0 °C to +70°C TC07CUA 8-Pin MSOP 0 °C to +70°C TC07EOA 8-Pin SOIC – 40 °C to +85°C TC07EUA 8-Pin MSOP – 40 °C to +85°C TC07VOA 8-Pin SOIC – 40 °C to +125°C TC07VUA 8-Pin MSOP – 40 °C to +125°C FUNCTIONAL BLOCK DIAGRAM 3V LOGIC OUTPUT TEMPERATURE SENSOR WITH PROGRAMMABLE HYSTERESIS
FEATURES
n User Programmable Hysteresis and Temperature Set Point n Easily Programs with Two External Resistors n Wide Temperature Detection Range n Small 8-Pin MSOP and 8-Pin SOIC Packages n Cost Effective
APPLICATIONS
n Power Supply Over-Temperature Detection n Consumer Equipment n Temperature Regulators n Computer Equipment GENERAL DESCRIPTION The TC07 is a programmable, logic output temperature detector that operates from power supply levels as low as 2.7V. Programming is accomplished with external resistors connected from the temperature setpoint input (T SET ) and the hysteresis control input (HSET ) to VDD . Complimentary outputs (OUT and OUT) are driven active when temperature exceeds the temperature thresh- old programmed by the resistor on T SET . The states of these outputs are maintained (latched) until temperature falls below threshold programmed by the resistor on H SET . The TC07 is useful over a maximum temperature range of – 40°C to +125°C (TC07VxA). It features low (<130µA) supply current and small physical size 8-pin MSOP and 8-pin SOIC packages, making it suitable for a wide variety of applications. PIN CONFIGURATION 8-Pin MSOP TSET OUT OUT TEMPERATURE TO VOLTAGE CONVERTER VOLTAGE REFERENCE GENERATOR TEMP SENSOR H SET VDD GND S Q R Q 8-Pin SOIC GND TSET H SET NC GND TSET H SET NC VDD OUT OUT NC VDD OUT OUT NC TC07COA TC07EOA TC07VOA TC07CUA TC07EUA TC07VUA
2-12 TELCOM SEMICONDUCTOR, INC. * Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ABSOLUTE MAXIMUM RATINGS* DETAILED DESCRIPTION The TC07 programs with resistors connected from the TSET and HSET inputs to VDD . Output pins OUT and OUT are driven active when temperature exceeds the setting deter- mined by the programming resistor on T SET . The outputs are maintained (latched) in their active states until temperature drops below the setting determined by the programming resistor on H SET (Figure 1). Figure 1. TC07 Output Waveforms The resistor values required to achieve the desired trip-point temperatures on TSET and HSET are calculated using the formula below: RTRIP = 0.6 x T 2.13 Where: R TRIP = Programming resistor value in Ohms T = Desired trip point temperature in degrees Kelvin. For example, to program the TC07 outputs to go active at 50°C and inactive at 30°C, the TSET and HSET program- ming resistors are calculated as follows: Resistance values for TSET and HSET can be approxi- mated using Figure 2. Care must be taken to ensure the H SET programming resistor is a smaller value than the TSET programming resistor. The temperature programmed on H SET must be at least 5°C lower than the temperature value programmed by TSET . That is: HSET ≤ TSET – 5°C. ELECTRICAL CHARACTERISTICS: TA = Over Operational Temperature Range, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit VDD Supply Voltage Range 2.7 — 5.5 V IDD Supply Current 2.7V < V CC < 5.5V — 130 300 µA VOH Output Voltage (High) IOUT = 500µA 0.8 x V DD —— V VOL Output Voltage (Low) IOUT = 1mA — — 0.25 x V DD V H Minimum Hysteresis H SET < TSET – 5 — — °C TC07 3V LOGIC OUTPUT TEMPERATURE SENSOR WITH PROGRAMMABLE HYSTERESIS