Overview
The TL7757CPKG3, produced by Texas Instruments, is a supply-voltage supervisor designed for use in microcomputer and microprocessor systems. This device is engineered to eliminate supply undervoltage fault conditions, ensuring reliable operation of the system. It features a precision voltage detector and provides a reset signal when the supply voltage falls below a predetermined threshold. The TL7757CPKG3 is available in various package options, including the SOT-89 (PK) package, which is specified here.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | -0.3 | 20 | V | |
| Operating Free-Air Temperature (TL7757C) | 0 | 70 | °C | |
| Operating Free-Air Temperature (TL7757I) | -40 | 85 | °C | |
| Output Current (IO) | 30 | mA | ||
| Package Thermal Impedance (θJA) - PK Package | 52 | °C/W | ||
| Negative-Going Input Threshold Voltage (VIT-) | 4.43 | 4.55 | 4.67 | V |
| Propagation Delay Time (tPLH, tPHL) | 2 | 5 | 5 | µs |
| Rise Time (tr) | 0.4 | 1 | 1 | µs |
| Fall Time (tf) | 0.05 | 1 | 1 | µs |
Key Features
- Precision voltage detection with a negative-going input threshold voltage of 4.43V to 4.67V.
- Provides a reset signal when the supply voltage falls below the predetermined threshold.
- Low supply current of 40µA (typical) at VCC = 5.5V.
- Propagation delay times of 2µs to 5µs for both low-to-high and high-to-low transitions.
- Available in SOT-89 (PK), SOIC (D), and TO-92 (LP) packages.
- Operating temperature ranges from -40°C to 85°C for the TL7757I version.
Applications
The TL7757CPKG3 is suitable for various applications requiring reliable supply voltage monitoring, including:
- Microcomputer and microprocessor systems.
- Embedded systems requiring precise voltage detection.
- Industrial control systems where reliable reset signals are crucial.
- Automotive and aerospace systems needing robust voltage supervision.
Q & A
- What is the primary function of the TL7757CPKG3?
The primary function is to monitor the supply voltage and provide a reset signal when the voltage falls below a predetermined threshold.
- What are the operating temperature ranges for the TL7757C and TL7757I versions?
The TL7757C operates from 0°C to 70°C, while the TL7757I operates from -40°C to 85°C.
- What is the typical supply current of the TL7757CPKG3 at VCC = 5.5V?
The typical supply current is 40µA.
- What are the propagation delay times for the reset signal?
The propagation delay times are 2µs to 5µs for both low-to-high and high-to-low transitions.
- In what packages is the TL7757 available?
The TL7757 is available in SOT-89 (PK), SOIC (D), and TO-92 (LP) packages.
- What is the maximum output current of the TL7757CPKG3?
The maximum output current is 30mA.
- How does the TL7757CPKG3 handle supply voltage undervoltage conditions?
The device eliminates supply undervoltage fault conditions by providing a reset signal when the supply voltage falls below the threshold.
- What is the thermal impedance of the SOT-89 (PK) package?
The thermal impedance of the SOT-89 (PK) package is 52°C/W.
- What is the negative-going input threshold voltage range of the TL7757CPKG3?
The negative-going input threshold voltage range is 4.43V to 4.67V.
- Can the TL7757CPKG3 be used in automotive applications?
Yes, the TL7757CPKG3 can be used in automotive and aerospace systems due to its robust voltage supervision capabilities.
