MAX705MJA

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MAX705MJA

IC SUPERVISOR 1 CHANNEL 8CERDIP

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規格

Package Tube
ProductStatus Active
Type Simple Reset/Power-On Reset
NumberofVoltagesMonitored 1
Voltage-Threshold 4.65V
Output Push-Pull, Totem Pole
Reset Active Low
ResetTimeout 140ms Minimum
OperatingTemperature -55°C ~ 125°C (TA)
MountingType Through Hole
Package/Case 8-CDIP (0.300, 7.62mm)

概述

Description

The MAX705MJA is a microprocessor supervisory circuit designed to monitor the power supply to a microprocessor system. It provides essential functions to ensure reliable operation, including a reset output during power-up, power-down, and brownout conditions. The device typically includes a watchdog timer, which resets the microprocessor if it fails to toggle a specific input within a set timeframe, preventing system hang-ups. It also often features a manual reset input, allowing for an external reset trigger.
The MAX705MJA operates over a range of supply voltages and is designed to be highly efficient, with low power consumption being a key feature. It is packaged in a standard integrated circuit form, typically suitable for various applications, including consumer electronics, industrial controls, and embedded systems.
Key specifications often include a precise voltage threshold for reset activation, ensuring that the microprocessor is only allowed to operate when the power supply is adequate. This makes it an integral component in maintaining the stability and reliability of microprocessor-based systems.

Features

The MAX705MJA is a microprocessor supervisory circuit designed to monitor power supply levels in microprocessor-based systems. Key features include:
1. Voltage Monitoring: It monitors supply voltage and provides a reset signal to the microprocessor during power-up, power-down, and brownout conditions to prevent code execution errors.
2. Reset Output: It features an active-low reset output with a fixed threshold voltage, ensuring the microprocessor operates correctly only at proper voltage levels.
3. Watchdog Timer: The device includes a watchdog timer to ensure the microprocessor is functioning correctly. If the microprocessor fails to reset the timer, the MAX705MJA triggers a reset.
4. Manual Reset Input: It offers a manual reset input, allowing the user to initiate a reset sequence manually.
5. Low Supply Current: With a low operating current, it is suitable for battery-powered applications.
6. Small Package: It is available in a compact package, making it suitable for space-constrained applications.
These features make the MAX705MJA ideal for enhancing the reliability of microprocessor systems by preventing erroneous operations during unstable power conditions.

Package

The MAX705MJA is a microprocessor supervisory circuit typically packaged in an 8-pin Ceramic Dual In-line Package (CERDIP). This package type is suitable for applications requiring high reliability and is often used in environments with higher thermal and mechanical stress.

Pinout

The MAX705MJA is a microprocessor supervisory circuit designed to monitor and manage the operation of microprocessor systems. It typically comes in an 8-pin package. Here are the key functions and pin descriptions:
1. VCC (Pin 8): Power supply pin for the device.
2. GND (Pin 4): Ground pin.
3. RESET (Pin 7): Active-low reset output. It is used to reset the microprocessor during power-up, power-down, or when a brownout condition occurs.
4. RESET (Pin 6): Active-high reset output. Similar function to the active-low reset, but active when the reset condition is met.
5. WDI (Pin 3): Watchdog input. It monitors microprocessor activity and triggers a reset if a pulse is not received within a specified time.
6. MR (Pin 2): Manual reset input. An external signal can trigger a reset.
7. VBATT (Pin 1): Backup battery input for memory retention during power failures.
8. VOUT (Pin 5): Output voltage pin that provides a regulated output or switches to backup battery when VCC is below threshold.
These supervisory circuits ensure reliable operation by providing reset control, watchdog functions, and battery backup switching.

Manufacturer

The MAX705MJA is manufactured by Maxim Integrated, which is now a part of Analog Devices, Inc. Maxim Integrated was known for designing and manufacturing analog and mixed-signal integrated circuits. They specialized in creating various semiconductor products, including power management ICs, interface ICs, and sensors. In August 2021, Maxim Integrated was acquired by Analog Devices, a company that is recognized as a global leader in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits. Analog Devices serves a wide range of industries, including communications, automotive, industrial, healthcare, and consumer electronics, emphasizing innovation and advanced technology solutions.

Application

The MAX705MJA is a microprocessor supervisory circuit commonly used in applications requiring system monitoring and reset functions to ensure reliable operation. Its primary areas of application include embedded systems, industrial controllers, consumer electronics, and automotive systems. It provides features such as power-on reset, watchdog timer, and battery backup switching, making it ideal for maintaining system stability and preventing data corruption during power failures or system malfunctions.

Equivalent

The MAX705MJA is a microprocessor supervisory circuit. Equivalent products include:
1. Texas Instruments: TPS3823-33
2. STMicroelectronics: STM706R
3. ON Semiconductor: CAT705
4. Microchip: MCP130T-315I/TT
5. Analog Devices: ADM705ARZ
These alternatives offer similar functionalities like reset monitoring, power-fail detection, and watchdog timer. Always verify specifications to ensure compatibility.

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