TL7705BIDR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Complementary
Reset:	Active High/Active Low
Reset Timeout:	270 ns Typical Propagation Delay
Voltage - Threshold:	4.55V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	TL7705B

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Introduction

The TL7705BIDR is an advanced voltage supervisor IC with an integrated watchdog timer and reset output. It is a product of Texas Instruments and is part of the PMIC-supervisor product family. The TL7705BIDR combines multiple devices into one and allows easy monitoring of up to two voltage thresholds. This can be used to improve reliability of digital systems and helps to ensure that the system is safe, reliable and secure. The TL7705BIDR can be used in a variety of applications, such as digital cameras, surveillance systems, medical equipment and industrial automation.

Application Field

The TL7705BIDR is a versatile tool for monitoring system reset and power management functions. It can be used to monitor supply voltages, monitor system reset and control power up sequence. It is especially useful for automotive applications, as it can detect open/short to ground, open/short to supply and out of voltage range. It is also useful for remote battery-powered applications, as it can detect if the battery is running low and respond accordingly.The TL7705BIDR is suitable for many different applications, including power on reset (POR), under voltage controlled reset (UVCR) and system monitoring reset (SMR). It is also a suitable solution for monitoring operating system security and validity, as it has the ability to detect start up problems such as double resets.

Working Principle

The TL7705BIDR monitors the voltage of two independent supply lines, which can be used to detect AC or DC power failures. The power on reset (POR) voltage can be set using a resistive divider and is monitored by the POR circuit. When the voltage drops below the POR threshold, the POR output is driven high to ensure that the system is in a reset state.The under voltage controlled reset (UVCR) also uses a resistive divider to set the UVCR voltage. If the voltage drops below the UVCR value, an inhibit signal is generated. This signal can be used to shut down the system or control an alarm.The system monitoring reset (SMR) circuit also uses a resistive divider to set the voltage threshold. If the voltage drops below the SMR threshold, the output signal is driven high. This output signal can be used to shut down the system or inform the user that the system is not operating properly.Finally, the integrated watchdog timer is used to provide a time-out signal in the event of an unstable system. This timer can be programmed via the SEL and RST pins. When the timeout period is reached, the watchdog will drive the output signal high, signaling a system error.

Conclusion

The TL7705BIDR is an advanced voltage supervisor IC suitable for a variety of applications. It can provide system reset and power management functions, and monitor two independent supply lines. Additionally, it features a watchdog timer and an integrated reset output for improved reliability and safety. This makes it an excellent choice for automotive, battery-powered and industrial applications.

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