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TC07CUA Datasheet(PDF) 2 Page - TelCom Semiconductor, Inc |
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TC07CUA Datasheet(HTML) 2 Page - TelCom Semiconductor, Inc |
2 / 3 page 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* Supply Voltage .............................................................. 7V Input Voltage Any Input ...... (GND – 0.3V) to (VDD + 0.3V) Operating Temperature ......................... – 40 °C to +125°C Maximum Chip Temperature ................................. +150 °C Storage Temperature ............................ – 65 °C to +150°C Lead Temperature (Soldering, 10 sec) ................. +300 °C 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 TSET. The outputs are maintained (latched) in their active states until temperature drops below the setting determined by the programming resistor on HSET (Figure 1). Figure 1. TC07 Output Waveforms TEMPERATURE OUT TEMPERATURE SET BY RESISTOR ON TSET HYSTERESIS SET BY RESISTOR ON HSET OUT APPLICATIONS Trip Point Programming 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: RTRIP = 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: TSET = 0.6 x ((50 + 273.15)2.13) = 132.8kΩ HSET = 0.6 x ((30 + 273.15)2.13) = 115.9kΩ Resistance values for TSET and HSET can be approxi- mated using Figure 2. Care must be taken to ensure the HSET programming resistor is a smaller value than the TSET programming resistor. The temperature programmed on HSET 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 < VCC < 5.5V — 130 300 µA VOH Output Voltage (High) IOUT = 500µA 0.8 x VDD —— V VOL Output Voltage (Low) IOUT = 1mA — — 0.25 x VDD V H Minimum Hysteresis HSET < TSET – 5 — — °C TSET Absolute Accuracy T = Programmed Temperature T – 3 T ± 1 T + 3 °C HSET Absolute Accuracy T = Programmed Temperature T – 5 T ± 1 T + 5 °C TC07 3V LOGIC OUTPUT TEMPERATURE SENSOR WITH PROGRAMMABLE HYSTERESIS |
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Similar Description - TC07CUA |
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