Overview
The TL7700CPWR, produced by Texas Instruments, is a bipolar integrated circuit designed for use as a reset controller in microcomputer and microprocessor systems. This device is part of the TL7700 series and is specifically packaged in an 8-pin TSSOP (Thin Shrink Small Outline Package). The TL7700CPWR is used to monitor supply voltages and generate a power-on reset signal in digital systems. It features a precision voltage reference, a fast comparator, a timing generator, and an output driver, ensuring stable operation over a wide range of supply voltages and temperatures.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 1.8 | - | 40 | V |
| Sense Input Voltage (Vs) | -0.3 | - | 41 | V |
| Operating Temperature Range | -40 | - | 85 | °C |
| Supply Current (ICC) at VCC = 40 V | - | 0.6 | 1 | mA |
| Output Pulse Duration (tpo) with CT = 0.01 µF | 0.5 | 1 | 1.5 | ms |
| Output Rise Time (tr) with CT = 0.01 µF, RL = 2.2 kΩ, CL = 100 pF | - | 15 | - | µs |
| Output Fall Time (tf) with CT = 0.01 µF, RL = 2.2 kΩ, CL = 100 pF | - | - | - | µs |
| Package Type | - | - | TSSOP (8-pin) | - |
Key Features
- Adjustable sense voltage with two external resistors, allowing any voltage greater than 0.5 V to be monitored.
- 1.0% sense voltage tolerance at 25°C.
- Adjustable hysteresis of sense voltage to prevent unstable resetting due to voltage ripples.
- Wide operating supply-voltage range: 1.8 V to 40 V.
- Wide operating temperature range: –40°C to 85°C.
- Low power consumption: ICC = 0.6 mA typical at VCC = 40 V.
- Internal 1.5-V temperature-compensated voltage reference.
- Fast comparator and timing generator for generating power-on reset signals.
- Open-collector output requiring a pull-up resistor.
Applications
- Digital Signal Processors (DSPs) and Microcontrollers (MCUs).
- Field-Programmable Gate Arrays (FPGAs) and Application-Specific Integrated Circuits (ASICs).
- Notebooks and desktop computers.
- Set-top boxes.
- Industrial control systems.
- Automotive and portable battery-operated devices.
Q & A
- What is the primary function of the TL7700CPWR?
The TL7700CPWR is designed as a reset controller in microcomputer and microprocessor systems, generating a power-on reset signal.
- What is the adjustable sense voltage range of the TL7700CPWR?
The sense voltage can be set to any value greater than 0.5 V using two external resistors.
- What is the operating supply-voltage range of the TL7700CPWR?
The device operates within a supply-voltage range of 1.8 V to 40 V.
- What is the operating temperature range of the TL7700CPWR?
The device operates over a temperature range of –40°C to 85°C.
- How is the sense voltage hysteresis set in the TL7700CPWR?
The hysteresis is set using the same external resistors that set the sense voltage, with the value determined by the current through one of the resistors.
- What is the typical supply current of the TL7700CPWR at VCC = 40 V?
The typical supply current is 0.6 mA.
- What type of output does the TL7700CPWR have?
The output is an open-collector output, requiring a pull-up resistor.
- How is the output pulse duration set in the TL7700CPWR?
The output pulse duration is set by the timing capacitor (Ct), with the duration calculated as tpo = Ct × 105 seconds.
- What are some common applications of the TL7700CPWR?
Common applications include DSPs, MCUs, FPGAs, ASICs, notebooks, desktop computers, set-top boxes, and industrial control systems.
- What package type is the TL7700CPWR available in?
The TL7700CPWR is available in an 8-pin TSSOP package.
