Qualified for Military 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 VDD ≥ 1.1 V

CDIP-8 and LCCC-20 Packages

Temperature Range . . . −55°C to 125°C

typical applications

Figure 1 lists some of the typical applications for

the TPS3307 family, and a schematic diagram for

a processor-based system application. This

application uses TI part numbers TPS3307−18

and SMJ320C6201B.

description

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 VDD 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 VIT+.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset.

The delay time, td typ= 200 ms, starts after all SENSEn inputs have risen above the threshold voltage VIT+. When

the voltage at any SENSE input drops below the threshold voltage VIT–, 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.