Overview
The MAX803SQ308D2T1G is a microprocessor reset supervisory circuit produced by onsemi. This device is part of the MAX803/NCP803 series, designed to monitor the power supply voltage in digital systems and provide a reset signal to the host processor when necessary. It is particularly suited for battery-powered applications due to its low supply current of 0.5 μA at VCC = 3.2 V. The MAX803SQ308D2T1G is available in a 3-pin SC-70 package and is Pb-free and RoHS compliant.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Range | 1.0 | - | 5.5 | V |
| Supply Current (VCC = 3.3 V) | - | 0.5 | 1.2 | μA |
| Supply Current (VCC = 5.5 V) | - | 1.8 | 2.5 | μA |
| Reset Active TimeOut Period | 20 | - | 140 | ms |
| RESET Output Voltage Low (VCC = VTH - 0.2 V, ISINK = 0.5 mA) | 1.6 | - | 2.1 | V |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| Lead Temperature (Soldering, 10 Seconds) | - | - | 260 | °C |
Key Features
- Precision VCC Monitor for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies
- Precision Monitoring Voltages from 1.2 V to 4.9 V Available in 100 mV Steps
- Four Guaranteed Minimum Power-On Reset Pulse Width Available (1 ms, 20 ms, 100 ms, and 140 ms)
- RESET Output Guaranteed to VCC = 1.0 V
- Low Supply Current
- VCC Transient Immunity
- No External Components Required
- Wide Operating Temperature: -40°C to 105°C
- Pb-Free and RoHS Compliant
Applications
- Computers
- Embedded Systems
- Battery Powered Equipment
- Critical Microprocessor Power Supply Monitoring
The MAX803SQ308D2T1G is particularly useful in systems that require precise monitoring of the power supply voltage and reliable reset signals during power-up, power-down, and brownout/sag conditions.
Q & A
- What is the primary function of the MAX803SQ308D2T1G?
The primary function is to monitor the power supply voltage in digital systems and provide a reset signal to the host processor when necessary.
- What is the typical supply current of the MAX803SQ308D2T1G at VCC = 3.3 V?
The typical supply current is 0.5 μA.
- What are the available reset pulse widths for the MAX803SQ308D2T1G?
The available reset pulse widths are 1 ms, 20 ms, 100 ms, and 140 ms.
- Is the MAX803SQ308D2T1G Pb-free and RoHS compliant?
- What is the operating junction temperature range of the MAX803SQ308D2T1G?
The operating junction temperature range is -40°C to 125°C.
- Does the MAX803SQ308D2T1G require any external components?
No, the device does not require any external components.
- How does the MAX803SQ308D2T1G handle VCC transients?
The device has built-in VCC transient immunity to reject fast transient glitches on the power supply line.
- What is the RESET output voltage low at VCC = VTH - 0.2 V, ISINK = 0.5 mA?
The RESET output voltage low is typically 1.6 V.
- Can the MAX803SQ308D2T1G be used in battery-powered applications?
- What are some typical applications of the MAX803SQ308D2T1G?
Typical applications include computers, embedded systems, battery-powered equipment, and critical microprocessor power supply monitoring.
