Overview
The TPS3705-33DRG4 is a power-on reset supervisor IC manufactured by Texas Instruments. This component is designed to provide essential voltage monitoring and supervision functions for microprocessor and microcontroller-based systems. It features a fixed 200ms power-on reset delay, precision supply voltage monitoring, and an integrated watchdog timer. The device is particularly useful in ensuring reliable operation of systems by monitoring the supply voltage and generating a reset signal if the voltage falls below a specified threshold.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TPS3705-33DRG4 |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Voltage - Threshold | 2.93V |
| Type | Simple Reset/Power-On Reset |
| Reset Timeout | 140 ms Minimum |
| Reset | Active Low |
| Output | Push-Pull, Totem Pole |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Number of Voltages Monitored | 1 |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
Key Features
- Fixed 200ms power-on reset delay without the need for an external capacitor.
- Precision supply voltage monitoring for 2.5V, 3V, 3.3V, and 5V.
- Integrated watchdog timer (specific to TPS3705-xx series).
- Voltage monitoring for power-fail or low-battery warning.
- Maximum supply current of 50µA.
- Available in 8-pin MSOP and 8-pin SOIC packages.
- Operating temperature range: -40°C to 85°C (and up to 125°C for TPS3705-33).
- Pin-for-pin compatible with the MAX705 through MAX708 series.
Applications
- Designs using DSPs, microcontrollers, or microprocessors.
- Industrial equipment.
- Programmable controls.
- Automotive systems.
- Portable or battery-powered equipment.
- Intelligent instruments.
- Wireless communication systems.
- Notebook or desktop computers.
Q & A
- What is the primary function of the TPS3705-33DRG4 IC?
The primary function is to provide power-on reset and voltage monitoring for microprocessor and microcontroller-based systems.
- What is the voltage threshold for the TPS3705-33DRG4?
The voltage threshold is 2.93V.
- What type of reset does the TPS3705-33DRG4 generate?
The TPS3705-33DRG4 generates an active low reset.
- What is the reset timeout for the TPS3705-33DRG4?
The reset timeout is a minimum of 140ms.
- Does the TPS3705-33DRG4 require an external capacitor for the power-on reset delay?
No, it does not require an external capacitor for the power-on reset delay.
- What are the available package types for the TPS3705-33DRG4?
The available package types are 8-pin MSOP and 8-pin SOIC.
- What is the operating temperature range for the TPS3705-33DRG4?
The operating temperature range is -40°C to 85°C (and up to 125°C for TPS3705-33).
- Is the TPS3705-33DRG4 RoHS compliant?
- What is the maximum supply current of the TPS3705-33DRG4?
The maximum supply current is 50µA.
- What are some common applications of the TPS3705-33DRG4?
Common applications include industrial equipment, automotive systems, portable or battery-powered equipment, and wireless communication systems.
