V

DD

Transient

Amplitude

Duration

V

IT-

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

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

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

Figure 8. Power-Up Response

6

Submit Documentation Feedback

Copyright

© 2011, Texas Instruments Incorporated

Product Folder Link(s): TLV803M TLV803R TLV803S TLV803Z