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LTC2908ITS8-B1 Datasheet(PDF) 3 Page - Linear Integrated Systems |
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LTC2908ITS8-B1 Datasheet(HTML) 3 Page - Linear Integrated Systems |
3 / 16 page 3 LTC2908 sn2908 2908fs SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Internal Operating Voltage RST in Correct Logic State ● 0.5 6 V IV1 V1 Input Current V1 = 5.0V (LTC2908-A1) (Note 4) ● 26 50 µA V1 = 3.3V (LTC2908-B1) ● 24 50 µA IV2 V2 Input Current V2 = 3.3V (LTC2908-A1) (Note 4) ● 10 20 µA V2 = 2.5V (LTC2908-B1) ● 820 µA IV3 V3 Input Current V3 = 2.5V (LTC2908-A1) ● 25 µA V3 = 1.8V (LTC2908-B1) ● 25 µA IV4 V4 Input Current V4 = 1.8V (LTC2908-A1) ● 25 µA V4 = 1.5V (LTC2908-B1) ● 25 µA IVADJ VADJ1, VADJ2 Input Current VADJ1 = VADJ2 = 0.55V ● ±15 nA tRST Reset Time-Out Period ● 160 200 260 ms tUV VX Undervoltage Detect to RST or RST VX Less Than Reset Threshold VRTX by 250 µs More Than 1% VOH Output Voltage High RST (Note 5) IRST = –1µA, VCC = 5V (LTC2908-A1) ● VCC – 1.5 V IRST = –1µA, VCC = 3.3V (LTC2908-B1) ● VCC – 1.0 V VOL Output Voltage Low RST VCC = 0.5V, IRST = 5µA ● 0.01 0.15 V VCC = 1.0V, IRST = 100µA ● 0.01 0.15 V VCC = 3.0V, IRST = 2500µA ● 0.10 0.30 V The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. VCC = 5V for the LT2908-A1 and VCC = 3.3V for the LTC2908-B1, unless otherwise noted. (Notes 2, 3) ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The greater of V1, V2 is the internal supply voltage (VCC). Note 3: All currents into pins are positive; all voltages are referenced to GND unless otherwise noted. Note 4: Under typical operating conditions, most of the quiescent current is drawn from the V1 input. When V2 exceeds V1, V2 supplies most of the quiescent current. Note 5: The output pin RST has an internal pull-up to VCC of typically 6µA. However, an external pull-up resistor may be used when a faster rise time is required or for VOH voltages greater than VCC. TYPICAL PERFOR A CE CHARACTERISTICS 5V Threshold Voltage vs Temperature 3.3V Threshold Voltage vs Temperature 2.5V Threshold Voltage vs Temperature TEMPERATURE (°C) –50 4.750 4.725 4.700 4.675 4.650 4.625 4.600 25 75 2908 G01 –25 0 50 100 TEMPERATURE (°C) –50 3.135 3.115 3.095 3.075 3.055 3.035 25 75 2908 G02 –25 0 50 100 TEMPERATURE (°C) –50 2.375 2.360 2.345 2.330 2.315 2.300 25 75 2908 G03 –25 0 50 100 Specifications are at TA = 25°C unless otherwise noted. |
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