Overview
The CAT811TTBI-T3, produced by onsemi, is a microprocessor supervisory circuit designed to monitor power supplies and ensure reliable operation of microprocessors. This device is a direct replacement for the MAX811 and is fully specified over the industrial temperature range of -40°C to 85°C. It features a manual reset input and a push-pull output configuration with an active LOW reset signal. The CAT811TTBI-T3 is available in a compact 4-pin SOT-143 package, making it suitable for a variety of applications requiring precise power supply monitoring.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| VCC Range | 1.0 | - | 5.5 | V |
| Supply Current (ICC) | 6 | 15 | 20 | μA |
| Reset Threshold Voltage (VTH) | 2.85 | 2.93 | 3.00 | V |
| Reset Active Timeout Period | 140 | - | 400 | ms |
| Operating Ambient Temperature Range | -40 | - | 85 | °C |
| Storage Temperature Range | -65 | - | 105 | °C |
| Lead Soldering Temperature (10 seconds) | - | - | 300 | °C |
| Package Type | - | - | SOT-143 | - |
Key Features
- Precision monitoring of power supply voltages (+5.0 V, +3.3 V, +3.0 V, and +2.5 V) with various threshold levels.
- Manual reset input with an internal 20 kΩ pull-up resistor.
- Active LOW reset output configuration.
- Direct replacement for the MAX811 in applications operating over the industrial temperature range.
- Reset signal valid down to VCC = 1.0 V.
- Low power supply current (typically 6 μA to 20 μA).
- Power supply transient immunity to protect against brownout failures.
- Available in SOT-143 packages with Sn or NiPdAu green lead finishes.
Applications
- Microprocessor and microcontroller systems requiring reliable power supply monitoring.
- Industrial control systems and automation.
- Embedded systems and IoT devices.
- Medical devices and equipment.
- Aerospace and defense applications.
Q & A
- What is the primary function of the CAT811TTBI-T3?
The primary function of the CAT811TTBI-T3 is to monitor the power supply voltage and generate a reset signal if the voltage falls below a preset threshold or during power-up.
- What are the available threshold voltage levels for the CAT811TTBI-T3?
The CAT811TTBI-T3 offers several industry-standard threshold levels, including +5.0 V, +3.3 V, +3.0 V, and +2.5 V.
- What is the package type of the CAT811TTBI-T3?
The CAT811TTBI-T3 is available in a 4-pin SOT-143 package.
- What is the operating temperature range of the CAT811TTBI-T3?
The CAT811TTBI-T3 operates over the industrial temperature range of -40°C to 85°C.
- How does the manual reset input work on the CAT811TTBI-T3?
The manual reset input has an internal 20 kΩ pull-up resistor. A logic LOW on this input asserts the RESET signal, which remains active as long as the input is LOW and for 140 ms after it returns HIGH.
- What is the typical supply current of the CAT811TTBI-T3?
The typical supply current of the CAT811TTBI-T3 is between 6 μA and 20 μA.
- Does the CAT811TTBI-T3 have any protection against power supply transients?
Yes, the CAT811TTBI-T3 has power supply transient immunity to protect against brownout failures.
- What is the reset active timeout period for the CAT811TTBI-T3?
The reset active timeout period for the CAT811TTBI-T3 is at least 140 ms after the power supply voltage has risen above the threshold.
- Can the CAT811TTBI-T3 be used in high-temperature environments?
Yes, the CAT811TTBI-T3 is fully specified over the industrial temperature range of -40°C to 85°C.
- Is the CAT811TTBI-T3 RoHS compliant?
Yes, the CAT811TTBI-T3 is available with RoHS-compliant lead finishes.
