TPS3307-18-Q1

• Qualified for Automotive Applications
• ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
• Triple Supervisory Circuits for DSP and Processor-Based Systems
• Power-On Reset Generator with Fixed Delay Time of 200 ms, No External Capacitor Needed
• Temperature-Compensated Voltage Reference
• Maximum Supply Current of 40 µA
• Supply Voltage Range ...2 V to 6 V
• Defined RESET Output from V_DD ≥ 1.1 V
• SO-8 Package
• Temperature Range ...–40°C to 125°C
• typical applications
  • Automotive applications using DSPs, Microcontrollers or Microprocessors
  • Industrial Equipment
  • Programmable Controls
  • Automotive Systems

The TPS3307-18 is a micropower supply voltage supervisor designed for circuit initialization primarily in automotive DSP and processor-based systems, which require more than one supply voltage.

The TPS3307-18 is designed for monitoring three independent supply voltages: 3.3 V/1.8 V/adj,. The adjustable SENSE input allows the monitoring of any supply voltage >1.25 V.

The various supply voltage supervisors are designed to monitor the nominal supply voltage as shown in the following supply voltage monitoring table.

During power-on, RESET is asserted when the supply voltage V_DD becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors the SENSEn inputs and keeps RESET\ active as long as SENSEn remain below the threshold voltage V_IT+.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, t_{d typ} = 200 ms, starts after all SENSEn inputs have risen above the threshold voltage V_IT+. When the voltage at any SENSE input drops below the threshold voltage V_IT–, the RESET output becomes active (low) again.

The TPS3307-18 incorporates a manual reset input, MR. A low level at MR causes RESET to become active. In addition to the active-low RESET output, the TPS3307-18 includes an active-high RESET output.

The device is available in a standard 8-pin SO package, and is characterized for operation over a temperature range of –40°C to 125°C.