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TLV803R Datasheet(PDF) 6 Page - Texas Instruments |
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TLV803R Datasheet(HTML) 6 Page - Texas Instruments |
6 / 15 page V DD Transient Amplitude Duration V IT- tw RESET V DD t d V +V IT HYS - 1.1V ValidOutput TLV803M, TLV803R TLV803S, TLV803Z SBVS157A – APRIL 2011 – REVISED JUNE 2011 www.ti.com APPLICATION INFORMATION VDD TRANSIENT REJECTION The TLV803 has built-in rejection of fast transients on the VDD pin. The rejection of transients depends on both the duration and the amplitude of the transient. The amplitude of the transient is measured from the bottom of the transient to the negative threshold voltage of the TLV803, as shown in Figure 7. Figure 7. Voltage Transient Measurement The TLV803 does not respond to transients that are fast duration/low amplitude or long duration/small amplitude. Figure 4 shows the relationship between the transient amplitude and duration needed to trigger a reset. Any combination of duration and amplitude above the curve generates a reset signal. RESET DURING POWER UP/DOWN The TLV803 output is valid when VDD is greater than 1.1 V. When VDD is less than 1.1 V, the output transistor turns off and becomes high impedance. The voltage on the RESET pin rises to the voltage level connected to the pull-up resistor. Figure 8 shows a typical waveform for power-up, assuming the RESET pin has a pull-up resistor connected to the VDD pin. Figure 8. Power-Up Response 6 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TLV803M TLV803R TLV803S TLV803Z |
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