TI introduced Nano-Power Ultra-Low Voltage Supervisor with Adjustable Reset Time Delay

Texas Instruments (TI) introduced the family of voltage supervisors or reset ICs that can operate at high voltage levels while maintaining very low quiescent current across the whole V_DD and temperature range. TLV840 offers best combination of low power consumption, high accuracy and low propagation delay (t_{p_HL} = 30 μs typical).

Reset output signal is asserted when the voltage at V_DD drops below the negative voltage threshold (V_IT-). Reset signal is cleared when V_DD rise above V_{IT- plus} hysteresis (V_HYS) and the reset time delay (t_D) expires. Reset time delay can be programmed by connecting a capacitor between the CT pin and ground for TLV840C and TLV840M. For a minimum reset delay time the CT pin can be left floating. TLV840N does not offer a programmable delay and offers fixed reset delay timing options: 40 μs, 2 ms, 10 ms, 30 ms, 50 ms, 80 ms, 100 ms, 150 ms, 200 ms.

Typical Application Circuit.

Additional features:

• Low power-on reset voltage (V_POR),
• Built-in glitch immunity protection for V_DD,
• Built-in hysteresis,
• Low open-drain output leakage current (I_LKG(OD)).

Typical Supply Current vs. Supply Voltage.

TLV840 is a perfect voltage monitoring solution for industrial applications and battery-powered / low-power applications.

Features

• Operating voltage range: 0.7 V to 6 V
• Nano supply current: 120 nA (Typical)
• Fixed threshold voltage (V_IT-): 0.8 V to 5.5 V in 0.1-V steps
  • High accuracy: 0.5% (Typical)
  • Built-in hysteresis (V_IT+): 5% (Typical)
• Reset time delay (t_D): capacitor-based programmable (TLV840C, TLV840M)
  • Minimum time delay: 30 μs (typical) without capacitor
• Active-low manual reset (MR) (TLV840M)
• Four output topologies:
  • TLV840xxDL: open-drain, active-low (RESET)
  • TLV840xxPL: push-pull, active-low (RESET)
  • TLV840xxDH: open-drain, active-high (RESET)
  • TLV840xxPH: push-pull, active-high (RESET)
• Wide temperature range: –40 °C to +125 °C
• Package: SOT23-5 (DBV)

Applications

• Motor Drives
• Factory Automation and Control
• Home Theater and Entertainment
• Electronic Point of Sale
• Grid Infrastructure
• Data Center and Enterprise Computing
• Multifunction Printer

The TLV840 Evaluation Module.