CAT1161WI-30-GT3

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active High/Active Low
Reset Timeout:	130 ms Minimum
Voltage - Threshold:	3V
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:	CAT1161

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The advanced system-on-chip (SoC) designs used in many consumer and industrial applications require sophisticated power management solutions that can ensure proper performance, prolong battery life and ensure safety compliance. CAT1161WI-30-GT3 is a low-Voltage supervisor PMIC designed to provide power management logic and voltage supervision for applications.

Overview

The CAT1161WI-30-GT3 is an easily configurable device for monitoring system power supplies and resetting microprocessor-based designs. It is available in SOIC and TSSOP packages, and operates from -40°C to 85°C temperature ranges. The device is typically used to supervise an array of system power rails from 1.1V to 5.5V, with an built-in threshold accuracy of ±500mV. It has an internal push-button power-on reset (POR) circuit and an active-high system reset output, with a choice of active-low or active-high debounced reset assertion. It also provides optional powerfail, low-battery and low-voltage reset (LVR) detection with delayed outputs, depending on system needs.The CAT1161WI-30-GT3 also boast of a substantial number of features to ensure proper system stability, including over-voltage detection and adjustable under-voltage detection. This ensures that system voltage stays within the specified operating range. The device also has an adjustable LVR threshold, adjustable reset timeout, and watchdog timer to periodically detect system malfunctions, locking up or program errors in the microprocessor. The device is designed to offer a maximum reset pulse width of 270 ms and 0.5 ms start-up time.

Application

The CAT1161WI-30-GT3 is a low-voltage supervisor PMIC for use in applications such as battery operated products, personal electronics, system data communications and more. It is ideal for those who require a reliable solution for monitoring system power supplies and resetting microprocessor designs. It is also suitable for applications with tight control of rising and falling power supply voltages, such as those found in cell phones and other mobile systems. The device is also highly versatile, with adjustable parameters that enable power supply monitoring and resetting in applications with stringent safety requirements.The CAT1161WI-30-GT3 is a high-performance and cost-effective reset solution that provides reset and power management logic to protect microprocessor-based designs and ensure maximum system stability. As a supervisor device, it provides reset logic in case of over-voltage, under-voltage or powerfail conditions and controls system reset delay, automatic reset assertion and pulse duration, so that automated safety systems can respond quickly and accurately.

Functional Principle

The CAT1161WI-30-GT3 is a very simple device, which relies on an adjustable threshold voltage circuit to accurately monitor system power. When the power supply voltage drops below the pre-defined voltage threshold, the low-voltage reset (LVR) output is asserted. This, in turn, triggers the reset logic circuit to reset the system and prevent subsequent system lock-ups. The CAT1161WI-30-GT3 also features an optional watchdog timer, which is activated by the start/stop control interface. When enabled, the watchdog will periodically reset the system to prevent system malfunctions. The device also has an adjustable reset timeout, adjustable pulse width, and adjustable reset assertion rate, to ensure that the reset occurs only when necessary and that any unintentional reset is prevented. All in all, the CAT1161WI-30-GT3 offers an inexpensive, easy-to-use, low-voltage supervisor PMIC to monitor system power supplies and ensure system safety. The device is capable of accurately detecting power fail, over-voltage and under-voltage conditions, and is ideal for use in applications with stringent safety requirements.

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