LTC1232CS8

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LTC1232CS8

+Nomenclature

Supervisory Circuits LTC1232 - Microprocessor Supervisory Circuit

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  • Pièce fabricant #LTC1232CS8

  • Fiche technique LTC1232CS8 DataSheet

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Présentation

Description

The LTC1232CS8 is a supervisory circuit designed to monitor microprocessor activity in embedded systems. It provides essential protection features, such as power supply monitoring, microprocessor reset, and watchdog timer functionalities. The chip ensures that the microprocessor operates correctly by generating a reset signal during power-up, power-down, and brownout conditions. It features a precision voltage reference and comparator for accurate voltage monitoring.
The device also includes a watchdog timer that requires regular toggling by the microprocessor to prevent system lock-up, thus ensuring the system remains responsive. In addition, the LTC1232CS8 provides a manual reset input, allowing external control over the reset line, which is useful for testing and debugging.
Packaged in an 8-pin SOIC, the LTC1232CS8 is known for its reliability and ease of integration into various applications, from industrial equipment to consumer electronics. Its low power consumption and robust performance make it a popular choice for designers looking to enhance system reliability and stability.

Equivalent

The LTC1232CS8 is a microprocessor supervisory circuit. Equivalent products include the MAX1232 from Maxim Integrated, the DS1232 from Dallas Semiconductor (now part of Maxim Integrated), and the TC1232 from Microchip Technology. These components offer similar functionality, such as monitoring supply voltage and providing a reset signal to a microprocessor. Always check the specific datasheets to ensure compatibility with your application.

Features

The LTC1232CS8 is a precision voltage monitor and microprocessor supervisory circuit. Key features include:
1. Voltage Monitoring: It monitors a single power supply and provides a reset output to indicate when the supply voltage is below a specified threshold. This ensures the microprocessor operates within specified voltage limits.
2. Reset Functionality: It offers a reset output with adjustable time delay, ensuring that the microprocessor initializes correctly after power-up or voltage drops.
3. Watchdog Timer: The device includes an internal watchdog timer that requires periodic toggling of the input to prevent the system from resetting. This feature helps in detecting and recovering from software malfunctions.
4. Manual Reset Input: A manual reset input pin allows a user to reset the system externally, offering flexibility in system management.
5. Open-Drain Outputs: The reset outputs are open-drain, allowing them to be wired ANDed with other resets.
6. Wide Operating Voltage Range: It supports a broad range of operating voltages, making it suitable for various applications.
7. Compact Package: The chip is available in an 8-pin SOIC package, facilitating easy integration into circuit designs.
These features make the LTC1232CS8 ideal for safeguarding the operation of microprocessor-based systems.

Pinout

The LTC1232CS8 is a microprocessor supervisory circuit designed to monitor the supply voltage of microprocessor systems. It comes in an 8-pin package. Here is a brief overview of its pin functions:
1. VCC (Pin 1): Positive supply voltage input.
2. PBRST (Pin 2): Push-button reset input. It allows manual reset when connected to a switch.
3. TD (Pin 3): Time delay select input. Used to select the duration of the reset timeout period.
4. OSC IN (Pin 4): Oscillator input. May be used to adjust the watchdog timer period with an external capacitor.
5. OSC SEL (Pin 5): Oscillator select input. Used to choose between internal and external clocking for the watchdog timer.
6. GND (Pin 6): Ground reference for the device.
7. RESET (Pin 7): Active-low reset output. It asserts low when the monitored voltage drops below the threshold or during a watchdog timeout.
8. WDI (Pin 8): Watchdog input. Requires periodic toggling to ensure the watchdog timer does not trigger a reset.
The LTC1232CS8 provides critical functions such as reset control, watchdog timing, and manual reset capabilities to ensure robust microprocessor operation.

Manufacturer

The LTC1232CS8 is manufactured by Linear Technology Corporation. Linear Technology is a company that specializes in the design, manufacturing, and marketing of high-performance analog integrated circuits. The company's products are used in a variety of applications across different industries, including telecommunications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace markets. Linear Technology was known for its innovation in analog technology, providing products that are essential for precise signal processing. In 2017, the company was acquired by Analog Devices, another major player in the semiconductor industry, which continues to offer products under the Linear Technology brand.

Application

The LTC1232CS8 is a microprocessor supervisory circuit used in various applications to ensure reliable system operation. Its primary functions include monitoring system power supplies, ensuring proper reset during power-up and power-down, and providing watchdog timer capabilities to prevent system lockup. Common application areas include embedded systems, industrial automation, telecommunications, consumer electronics, and any systems that require reliable microprocessor performance and protection against power anomalies. The device is particularly useful in environments where system stability is crucial and where sudden power failures or malfunctions could lead to data loss or system failure.

Package

The LTC1232CS8 is a microprocessor supervisory circuit from Linear Technology, packaged in an 8-lead SOIC (Small Outline Integrated Circuit). The "CS8" indicates the SOIC package type with 8 pins.

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