DS1232LP

Product Overview

• Category: Integrated Circuit (IC)
• Use: Reset Generator
• Characteristics:
  • Low-power CMOS circuitry
  • Precision voltage monitor
  • Manual reset input
  • Active-low reset output
  • Power-on reset delay time: 250ms (typical)
  • Watchdog timer with adjustable timeout period
• Package: 8-pin PDIP (Plastic Dual In-line Package)
• Essence: The DS1232LP is a low-power, precision voltage monitor and reset generator IC. It provides a reliable reset signal to microprocessors, microcontrollers, and other digital systems.
• Packaging/Quantity: The DS1232LP is typically sold in reels of 1000 units.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timeout Period: Adjustable from 1.6s to 6.3s
• Manual Reset Input Threshold Voltage: 0.7V (typical)
• Active-Low Reset Output Voltage: 0.4V (typical)

Pin Configuration

The DS1232LP has the following pin configuration:

```

---

| | --| RESET |-- --| GND |-- --| MR |-- --| VCC |-- --| WDI |-- --| RSTO |-- --| NC |-- |___________| ```

• RESET: Active-low reset output
• GND: Ground reference
• MR: Manual reset input
• VCC: Positive power supply
• WDI: Watchdog input
• RSTO: Reset output
• NC: No connection

Functional Features

1. Precision Voltage Monitoring: The DS1232LP continuously monitors the supply voltage and generates a reset signal when it falls below a preset threshold.
2. Manual Reset Input: The manual reset input allows an external signal to force a system reset.
3. Watchdog Timer: The built-in watchdog timer ensures that the system resets if it fails to receive a periodic input signal within the adjustable timeout period.
4. Active-Low Reset Output: The active-low reset output provides a reliable reset signal to the connected digital system.

Advantages and Disadvantages

Advantages: - Low-power CMOS circuitry ensures minimal power consumption. - Precision voltage monitoring enhances system reliability. - Adjustable watchdog timeout period allows flexibility in system design. - Active-low reset output simplifies interfacing with microprocessors and microcontrollers.

Disadvantages: - Limited operating temperature range (-40°C to +85°C). - Only available in an 8-pin PDIP package.

Working Principles

The DS1232LP operates by continuously monitoring the supply voltage using an internal voltage comparator. When the supply voltage drops below a preset threshold, the reset output is activated, signaling a system reset. The watchdog timer ensures system integrity by requiring a periodic input signal. If the input signal is not received within the adjustable timeout period, the reset output is triggered.

Application Field Plans

The DS1232LP is commonly used in various applications, including: 1. Microprocessor-based systems 2. Microcontroller-based systems 3. Embedded systems 4. Industrial control systems 5. Automotive electronics 6. Medical devices 7. Consumer electronics

Alternative Models

Some alternative models to the DS1232LP include: 1. MAX1232 2. MCP120 3. TPS3808 4. ADM803 5. LTC2950

These alternative models offer similar functionality and can be considered as replacements for the DS1232LP in different applications.

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