ISL88012IH522Z-T7A

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Multi-Voltage Supervisor
Number of Voltages Monitored:	2
Output:	Open Drain, Push-Pull
Reset:	Active High/Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	2.19V, Adj
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	ISL88012

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ISL88012IH522Z-T7A Application Field and Working Principle

PMIC (Power Management Integrated Circuits) are highly innovative and efficient components responsible for managing and monitoring the power and energy of all the connecting circuits. The ISL88012IH522Z-T7A is a 4-channel voltage supervisor by Renesas Electronics Corporation, classified as a type of PMIC – Supervisors.This device is specifically designed to monitor the power supply of system cores, microcontrollers, memory circuits, and other subsystems in embedded system applications. It can determine the power-on reset (POR) of systems with cores operating up to 28V and a more advanced power-on reset voltage generating function. It also has high-voltage flanking immunity protection of up to 28V, which is incomparable to most other traditional power-on reset devices of this type.The main characteristics of this part are its down-sweep accuracy, slew rate of 0.4V/us, monitoring window of 4V, low current consumption, and a high accuracy POR (power-on-reset) generated from an adjustable threshold of 1.8V to 5.7V. It contains two independent input pins, SBI and SD, allowing it to be configured as a single or dual channel design.The ISL88012IH522Z-T7A also contains two independent reset outputs, SPOR and SOR, respectively providing a reset signal when the voltage at either input fails to meet the voltage threshold set by an externally connected MUX. The part also contains additional features such as an active-high WATCHDOG OUTPUT, an independent active-low START-UP pin, and an independent active-low RESET-EN pin, making it work in conjunction with other circuits for reset and power-on/off sequencing.The ISL88012IH522Z-T7A offers a wide range of temperature range from -40 to 85 degrees Celsius which makes it suitable for applications located in extreme weather conditions. Its small 8-LDFN package is ideal for applications that demand minimal mounting space. The ISL88012IH522Z-T7A works by monitoring the voltage at the SBI and SD inputs and comparing it with the voltage at the adjustable threshold of 1.8V to 5.7V provided by a Mux. If the voltage falls below the threshold, SPOR and SOR are put into action, sending out reset signals. If the conditions remain, it will reset itself and will not respond to any further significant input changes made. The WATCHDOG output provides a fixed reset interval that is generated after a certain period of time until SBI or SD are de-glitched or a signal is generated to cancel the WATCHDOG reset or. Furthermore, the active-low START-UP pin is synchronized with SBI and SD, allowing it to trigger the system once a certain level of input is reached.To sum up, the ISL88012IH522Z-T7A is an ideal choice for embedded systems requiring tall flanking immunity protection along with a wide working temperature range. With its low current consumption, wide monitoring window, and reset/power-on sequence features, this voltage supervisor device is an efficient choice for any system application.

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