Overview
The MC34164D-5R2, produced by onsemi, is a micropower undervoltage sensing circuit designed for use as a reset controller in portable microprocessor-based systems. This device is particularly suited for applications where extended battery life is crucial. It offers an economical solution for low voltage detection using a single external resistor. The MC34164 series features a bandgap reference, a comparator with precise thresholds and built-in hysteresis, and an open collector reset output capable of sinking in excess of 6.0 mA. It guarantees operation down to 1.0 V input with extremely low standby current, making it ideal for power-sensitive applications.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Input Supply Voltage | Vin | -1.0 | - | 12 | V |
| Reset Output Voltage | VO | -1.0 | - | 12 | V |
| Reset Output Sink Current | ISink | - | - | Internally Limited | mA |
| Clamp Diode Forward Current | IF | - | - | 100 | mA |
| Maximum Power Dissipation @ TA = 25°C | PD | 700 | - | - | mW |
| Thermal Resistance, Junction-to-Air | RθJA | 178 | - | - | °C/W |
| Operating Junction Temperature | TJ | - | - | +150 | °C |
| Threshold Voltage (High State Output, Vin Increasing) | VIH | 4.15 | 4.15 | 4.45 | V |
| Threshold Voltage (Low State Output, Vin Decreasing) | VIL | 4.15 | 4.27 | 4.45 | V |
| Hysteresis (ISink = 100 µA) | VH | 0.02 | 0.09 | - | V |
| Output Sink Saturation (Vin = 4.0 V, ISink = 1.0 mA) | VOL | 0.1 | - | 0.4 | V |
| Output Sink Current (Vin, Reset = 4.0 V) | ISink | 7.0 | 20 | 50 | mA |
Key Features
- Temperature Compensated Reference
- Monitors 3.0 V (MC34164-3) or 5.0 V (MC34164-5) Power Supplies
- Precise Comparator Thresholds Guaranteed Over Temperature
- Comparator Hysteresis Prevents Erratic Reset
- Reset Output Capable of Sinking in Excess of 6.0 mA
- Internal Clamp Diode for Discharging Delay Capacitor
- Guaranteed Reset Operation With 1.0 V Input
- Extremely Low Standby Current: As Low as 9.0 µA
- Economical TO-92 (TO-226AA), TSOP-5, SOIC-8 and Micro8 Surface Mount Packages
- NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
- Pb-Free and RoHS Compliant
Applications
The MC34164D-5R2 is used in various applications including:
- Direct monitoring of 3.0 V or 5.0 V MPU/logic power supplies
- Appliance, automotive, consumer, and industrial equipment
Q & A
- What is the primary function of the MC34164D-5R2?
The MC34164D-5R2 is primarily used as an undervoltage sensing circuit and reset controller in portable microprocessor-based systems.
- What are the typical threshold voltages for the MC34164-5 series?
The threshold voltages are approximately 4.15 V for the high state output (Vin increasing) and 4.27 V for the low state output (Vin decreasing) with a hysteresis of 0.09 V.
- What is the maximum reset output sink current?
The reset output can sink in excess of 6.0 mA.
- What is the minimum input voltage for guaranteed operation?
The device guarantees operation down to 1.0 V input.
- What are the packaging options for the MC34164 series?
The devices are available in 3-pin TO-92 (TO-226AA), micro size TSOP-5, 8-pin SOIC-8, and Micro8 surface mount packages.
- Is the MC34164D-5R2 Pb-Free and RoHS compliant?
- What is the purpose of the NCV prefix in some versions of this device?
The NCV prefix is used for automotive and other applications requiring site and control changes.
- What is the typical standby current of the MC34164D-5R2?
The standby current is as low as 9.0 µA.
- What are the common applications of the MC34164D-5R2?
- What is the operating ambient temperature range for the MC34164D-5R2?
