仕様
| 属性 | 値 |
| Package | Tape & Reel (TR) |
| ProductStatus | Obsolete |
| Type | Simple Reset/Power-On Reset |
| NumberofVoltagesMonitored | 1 |
| Voltage-Threshold | 4.37V, 4.62V |
| Output | Open Drain or Open Collector |
| Reset | Active High/Active Low |
| ResetTimeout | 250ms Minimum |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
概要
Description
The MAX1232ESA+T is a microprocessor supervisory circuit manufactured by Maxim Integrated. It is designed to monitor the power supply and operation of microprocessors to ensure system reliability. The device combines a watchdog timer, a voltage monitor, and a manual reset function in a single package. Key features include:
1. Voltage Monitoring: It supervises the power supply voltage, ensuring it remains within specified limits. If the voltage drops too low, it triggers a reset to prevent erratic microprocessor behavior.
2. Watchdog Timer: It requires the microprocessor to periodically toggle a pin within a predefined time frame. Failure to do so results in a system reset, which prevents software from getting stuck in infinite loops or deadlocks.
3. Manual Reset Capability: It allows an external reset to be initiated through a dedicated input pin.
The MAX1232ESA+T is housed in an 8-pin small outline package (SOIC) and is suitable for applications requiring robust system monitoring, such as in embedded systems, consumer electronics, and critical control systems.
1. Voltage Monitoring: It supervises the power supply voltage, ensuring it remains within specified limits. If the voltage drops too low, it triggers a reset to prevent erratic microprocessor behavior.
2. Watchdog Timer: It requires the microprocessor to periodically toggle a pin within a predefined time frame. Failure to do so results in a system reset, which prevents software from getting stuck in infinite loops or deadlocks.
3. Manual Reset Capability: It allows an external reset to be initiated through a dedicated input pin.
The MAX1232ESA+T is housed in an 8-pin small outline package (SOIC) and is suitable for applications requiring robust system monitoring, such as in embedded systems, consumer electronics, and critical control systems.
Equivalent
The MAX1232ESA+T is a supervisory circuit for microprocessors. Equivalent products include the DS1232 from Dallas Semiconductor, the TL7705 from Texas Instruments, and the ADM1232 from Analog Devices. These alternatives provide similar functionalities such as monitoring power supply, ensuring proper reset signals, and watchdog timer features. Always verify pin compatibility and specific features to ensure a seamless replacement.
Features
The MAX1232ESA+T is a microprocessor supervisory circuit designed to monitor a microprocessor’s supply voltage, providing a range of features to enhance system reliability. Key features include:
1. Voltage Monitoring: It monitors the power supply for undervoltage conditions. If the voltage falls below a predefined threshold, it triggers a reset to the microprocessor.
2. Reset Functionality: It provides a reset output to ensure the microprocessor restarts in a known state following a brownout or power interruption. The reset is active until the power supply stabilizes.
3. Watchdog Timer: This feature helps prevent system lock-up by requiring periodic toggling of the watchdog input. If the microprocessor fails to toggle the input within a set time, a reset is initiated.
4. Manual Reset Input: Allows external control to reset the microprocessor, enabling manual resets through a simple push-button.
5. Small Package Size: Available in an 8-pin SOIC package, making it suitable for space-constrained applications.
These features make the MAX1232ESA+T ideal for maintaining reliable operation in embedded systems and microprocessor-based applications.
1. Voltage Monitoring: It monitors the power supply for undervoltage conditions. If the voltage falls below a predefined threshold, it triggers a reset to the microprocessor.
2. Reset Functionality: It provides a reset output to ensure the microprocessor restarts in a known state following a brownout or power interruption. The reset is active until the power supply stabilizes.
3. Watchdog Timer: This feature helps prevent system lock-up by requiring periodic toggling of the watchdog input. If the microprocessor fails to toggle the input within a set time, a reset is initiated.
4. Manual Reset Input: Allows external control to reset the microprocessor, enabling manual resets through a simple push-button.
5. Small Package Size: Available in an 8-pin SOIC package, making it suitable for space-constrained applications.
These features make the MAX1232ESA+T ideal for maintaining reliable operation in embedded systems and microprocessor-based applications.
Pinout
The MAX1232ESA+T is a microprocessor supervisory circuit designed to monitor the power supply and reset the microprocessor during power-up, power-down, or brownout conditions. It is an 8-pin device with the following pin functions:
1. GND (Pin 1): Ground reference for the device.
2. TOL (Pin 2): Tolerance input that selects the reset threshold voltages.
3. TD (Pin 3): Timeout delay input pin used to select the reset time delay.
4. VCC (Pin 4): Supply voltage input.
5. PBRST (Pin 5): Push-button reset input for manual reset control.
6. RST (Pin 6): Active-low reset output.
7. RST (Pin 7): Active-high reset output.
8. ST (Pin 8): Strobe input for external monitoring.
The MAX1232 monitors the supply voltage and provides both active-high and active-low reset outputs, ensuring the microprocessor remains in a known state during power disruptions.
1. GND (Pin 1): Ground reference for the device.
2. TOL (Pin 2): Tolerance input that selects the reset threshold voltages.
3. TD (Pin 3): Timeout delay input pin used to select the reset time delay.
4. VCC (Pin 4): Supply voltage input.
5. PBRST (Pin 5): Push-button reset input for manual reset control.
6. RST (Pin 6): Active-low reset output.
7. RST (Pin 7): Active-high reset output.
8. ST (Pin 8): Strobe input for external monitoring.
The MAX1232 monitors the supply voltage and provides both active-high and active-low reset outputs, ensuring the microprocessor remains in a known state during power disruptions.
Manufacturer
The MAX1232ESA+T is manufactured by Maxim Integrated, which is now part of Analog Devices, Inc. Maxim Integrated was known for designing, manufacturing, and selling analog and mixed-signal integrated circuits. The company focused on creating products that improve the performance and efficiency of electronic systems, serving industries such as automotive, communications, computing, consumer, and industrial markets. Analog Devices, Inc., which acquired Maxim Integrated in 2021, is a leading global technology company specializing in the design and manufacture of advanced semiconductor products and solutions. They provide high-performance analog, mixed-signal, and digital signal processing technologies to address the complex challenges in a variety of applications across diverse industries.
Application
The MAX1232ESA+T is a microprocessor supervisory circuit used primarily for monitoring microprocessor activity, ensuring reliable operation. Its key application areas include:
1. Embedded Systems: Provides a reset signal during power-up and prevents code execution errors due to power glitches.
2. Industrial Control: Ensures robust system performance by monitoring voltage levels and microprocessor activity.
3. Consumer Electronics: Used in devices like TVs and gaming consoles to enhance system reliability.
4. Networking Equipment: Maintains stable router and switch operations by monitoring supply voltages.
5. Automotive Electronics: Enhances the dependability of in-vehicle microcontrollers against voltage fluctuations and transient faults.
These features make it suitable for applications requiring reliability and fault tolerance.
1. Embedded Systems: Provides a reset signal during power-up and prevents code execution errors due to power glitches.
2. Industrial Control: Ensures robust system performance by monitoring voltage levels and microprocessor activity.
3. Consumer Electronics: Used in devices like TVs and gaming consoles to enhance system reliability.
4. Networking Equipment: Maintains stable router and switch operations by monitoring supply voltages.
5. Automotive Electronics: Enhances the dependability of in-vehicle microcontrollers against voltage fluctuations and transient faults.
These features make it suitable for applications requiring reliability and fault tolerance.
Package
The MAX1232ESA+T is a microprocessor supervisory circuit in an 8-pin SOIC (Small Outline Integrated Circuit) package. The "+T" suffix indicates it is supplied in a tape and reel format for automated manufacturing processes.
