Overview
The MC34064D-5R2 is an undervoltage sensing circuit designed by onsemi, specifically for use as a reset controller in microprocessor-based systems. It provides an economical solution for low voltage detection using a single external resistor. The device features a trimmed-in-package bandgap reference and a comparator with precise thresholds and built-in hysteresis to prevent erratic reset operations. The open collector reset output can sink more than 10 mA, and the device operates reliably down to a 1.0 V input with low standby current.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Input Supply Voltage | Vin | -1.0 | 10 | V | |
| Reset Output Voltage | VO | 10 | V | ||
| Reset Output Sink Current | ISink | 10 | Internally Limited | mA | |
| Clamp Diode Forward Current | IF | 100 | mA | ||
| Comparator Threshold Voltage (High State Output) | VIH | 4.59 | 4.61 | 4.7 | V |
| Comparator Threshold Voltage (Low State Output) | VIL | 4.5 | 4.6 | 4.7 | V |
| Comparator Hysteresis | 0.01 | 0.02 | 0.05 | V | |
| Operating Input Voltage Range | Vin | 1.0 | 6.5 | V | |
| Quiescent Input Current | Iin | 390 | 500 | μA | |
| Operating Ambient Temperature | TA | 0 | 70 | °C |
Key Features
- Trimmed-In-Package Temperature Compensated Reference: Ensures stable operation over a range of temperatures.
- Comparator Threshold of 4.6 V at 25°C: Precise threshold for reliable undervoltage detection.
- Precise Comparator Thresholds Guaranteed Over Temperature: Maintains accuracy across different temperatures.
- Comparator Hysteresis: Prevents erratic reset operations.
- Reset Output Capable of Sinking in Excess of 10 mA: Supports high current requirements.
- Internal Clamp Diode for Discharging Delay Capacitor: Enhances circuit stability.
- Guaranteed Reset Operation with 1.0 V Input: Reliable operation at low input voltages.
- Low Standby Current: Minimizes power consumption in standby mode.
- Economical Packaging Options: Available in TO-92, TSOP-5, SOIC-8, and Micro8 surface mount packages.
- Pb-Free and RoHS Compliant: Environmentally friendly packaging.
Applications
The MC34064D-5R2 is suitable for various applications, including:
- Direct Monitoring of 5.0 V MPU/Logic Power Supply: Used in systems requiring precise voltage monitoring.
- Appliance Equipment: Ensures reliable operation in household appliances.
- Automotive Equipment: Meets the stringent requirements of automotive systems.
- Consumer Electronics: Ideal for consumer devices needing voltage supervision.
- Industrial Equipment: Used in industrial settings for robust voltage monitoring.
Q & A
- What is the primary function of the MC34064D-5R2?
The MC34064D-5R2 is an undervoltage sensing circuit designed to act as a reset controller in microprocessor-based systems.
- What is the comparator threshold voltage of the MC34064D-5R2 at 25°C?
The comparator threshold voltage is 4.6 V at 25°C.
- What is the minimum input voltage for guaranteed reset operation?
The device guarantees reset operation with an input voltage as low as 1.0 V.
- What is the maximum current the reset output can sink?
The reset output can sink in excess of 10 mA.
- What types of packages are available for the MC34064D-5R2?
The device is available in TO-92, TSOP-5, SOIC-8, and Micro8 surface mount packages.
- Is the MC34064D-5R2 Pb-Free and RoHS compliant?
Yes, the MC34064D-5R2 is Pb-Free and RoHS compliant.
- What is the operating ambient temperature range for the MC34064D-5R2?
The operating ambient temperature range is 0°C to +70°C.
- What is the quiescent input current of the MC34064D-5R2?
The quiescent input current is typically 390 μA at 5.0 V input.
- What applications are the MC34064D-5R2 suitable for?
The device is suitable for appliance, automotive, consumer, and industrial equipment.
- Does the MC34064D-5R2 have built-in hysteresis?
Yes, the device includes built-in hysteresis to prevent erratic reset operations.
