The PT7A4401CJE is a low-voltage supervisory circuit manufactured by Pericom (now Diodes Incorporated). This device, similar to other members of the PT7A4401 family, monitors the power supply voltage in microprocessor and digital systems and provides a reset signal when the voltage falls below a specified threshold, preventing erroneous operation.

Applications:

• Microprocessor systems
• Microcontroller systems
• Digital signal processors (DSPs)
• Embedded systems
• Critical voltage monitoring
• Portable devices

Features:

• Precision Voltage Monitoring: Accurately monitors the supply voltage.
• Reset Output: Provides an active-low reset signal.
• Low Supply Current: Minimizes power consumption.
• Small Package: Available in small surface-mount packages.
• Defined Reset Output Valid Down to VCC = 1.2V: Ensures reliable reset assertion even at very low supply voltages.
• Built-in Glitch Immunity: Prevents false resets due to transient voltage dips or spikes.
• No external components required: Simplifies board design.

Benefits:

• Prevents System Malfunctions: Ensures proper system initialization and operation by asserting a reset during power-up, power-down, and voltage dips.
• Improved System Reliability: Protects the system from data corruption and unpredictable behavior caused by low voltage conditions.
• Reduced Power Consumption: Low supply current contributes to energy efficiency.
• Simplified Design: Requires minimal external components, saving board space and reducing design complexity.
• Reliable Reset Assertion: Guarantees reset operation even at very low voltages, ensuring system integrity in critical situations.

Additional Details:

The PT7A4401CJE monitors a single voltage supply. The key difference between the PT7A4401CJE and other family members like PT7A4401BJ and PT7A4401CJ lies primarily in the reset threshold voltage. Each variant will have a slightly different pre-determined threshold. This device offers a precise and reliable way to monitor the supply voltage and assert a reset signal when the voltage falls below this threshold. Its glitch immunity prevents false resets caused by transient voltage variations, ensuring stable system operation. The PT7A4401CJE is frequently used in embedded systems and other applications where reliable power supply monitoring is critical.