FEATURES DESCRIPTION 2 The TPS3809 family of supervisory circuits
provides • 3-Pin SOT-23 Package circuit initialization and timing
supervision, primarily • Supply Current of 9 μA (Typical) for DSPs
and processor-based systems. • Precision Supply Voltage Monitor
During power-on, RESET is asserted when the 2.5 V, 3 V, 3.3 V, 5 V
supply voltage VDD becomes higher than 1.1 V. • Pin-For-Pin
Compatible With MAX 809 Thereafter, the supervisory circuit
monitors VDD and • Temperature Range: –40°C to +85°C keeps RESET
active as long as VDD remains below the threshold voltage VIT. An
internal timer delays the APPLICATIONS return of the output to the
inactive state (high) to ensure proper system reset. The delay
time, td(typ) = • Applications Using DSPs, Microcontrollers, or 200
ms, starts after VDD has risen above the Microprocessors threshold
voltage VIT. When the supply voltage drops • Wireless Communication
Systems below the threshold voltage VIT, the output becomes active
(low) again. No external components are • Portable/Battery-Powered
Equipment required. All the devices of this family have a fixed •
Programmable Controls sense-threshold voltage VIT set by an
internal voltage • Intelligent Instruments divider. • Industrial
Equipment The product spectrum is designed for supply voltages •
Notebook/Desktop Computers of 2.5 V, 3 V, 3.3 V, and 5 V. The
circuits are available in a 3-pin SOT-23. The TPS3809 devices •
Automotive Systems are characterized for operation over a
temperature range of –40°C to 85°C
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