MAX6754UKTD0+T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	20 µs Typical
Voltage - Threshold:	3.3V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	MAX6754

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Introduction

The MAX6754UKTD0+T is a precision CMOS supervisor integrated circuit (IC) designed to power up and monitor negative supply voltage systems with bipolar + and - logic levels. Supervisors are commonly used in electronic devices to ensure correct power-on-reset (POR) sequences are employed. This particular supervisor IC is built with a low-power CMOS technology and features an extremely low supply current of only 0.9?A typ. As with all supervisors, the MAX6754UKTD0+T is designed to prevent any device started with incorrect or too low supply voltage.

Application Field

The MAX6754UKTD0+T is an IC specifically used in the field of PMIC - Supervisors. Supervisors are used in many electronic devices to ensure that the power-on-reset (POR) sequence is initiated properly and that the device is supplied with the correct voltage. The MAX6754UKTD0+T is particularly suited for negative supply voltage systems with bipolar + and - logic levels. As it is built with low-power CMOS technology, the device also has low-power consumption, making it suitable for battery-powered applications.

Features

The MAX6754UKTD0+T features many advantages, such as very low supply current, fast reset response, very low starting threshold and accuracy (±1.5%), wide operating temperature range (-40°C to +85°C), open drain reset output and active-low reset output. It also has balancing hysteresis, preventing false reset during power-up or power-down times.The device is capable of monitoring both positive and negative supplies, down to -1.5V and up to +6V. It can also detect mono-voltage operation in case of a short circuit. Furthermore, the MAX6754UKTD0+T comes with an adjustable reset timeout delay (50ms to 1.4s) and an output voltage warning flag for monitoring supply voltage level.

Working Principle

The MAX6754UKTD0+T operates on the principle of supply voltage power-on reset (POR). This principle works by having two internal comparators: one that compares the voltage applied at the RESET input to a reference and another that compares the ON/OFF input to the same reference. When the voltage applied to the ON/OFF input reaches the same level as the RESET input, a power up operation is initiated. When the voltage applied to the ON/OFF input is below the RESET input, a power-down operation is initiated and the MAX6754UKTD0+T will reset the system. The device\'s internal voltage reference during POR is adjusted by the internal VREF pin. The VREF pin is also used to detect abnormal voltage levels during the POR cycle. The MAX6754UKTD0+T also features an adjustable reset timeout delay (50ms to 1.4s), which is determined by the RC1 and RC2 resistors connected in series with the RESET pin. The output voltage warning flag, available on the MAX6754UKTD0+T, also monitors the supply voltage level and can be used to shut down the device or alert monitoring systems in case of voltage faults.

Conclusion

The MAX6754UKTD0+T is a PMIC - Supervisors integrated circuit designed to monitor and power up negative supply voltage systems with bipolar + and - logic levels. Thanks to its low-power CMOS technology, it has an extremely low supply current of only 0.9µA typ. It also has several unique features, such as adjustable reset delay, balancing hysteresis and active-low reset output, which make it a popular choice for many power supply applications. The MAX6754UKTD0+T is used to ensure that devices are started with the correct voltage and to prevent incorrect or too low voltage from causing the system to reset.

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