RT9801

Features:

`􀁺 User Programmable Threshold 1.5V to 5V in 0.1V Step with ±3% Accuracy
`􀁺 Low Supply Current 3A
`􀁺 Quick Reset within 20S
`􀁺 Built-in Recovery Delay 200mS
`􀁺 Low Functional Supply Voltage 0.9V
`􀁺 Small SOT-26 Package


Application

`􀁺 Computers
`􀁺 Controllers
`􀁺 Intelligent Instruments
`􀁺 Critical P and C Power Monitoring
`􀁺 Portable/Battery-Powered Equipment


Pinout




Specifications

` Terminal Voltage (with Respect to GND)
    VDD....................... -0.3V to 6.0V
    All Other Inputs.............. -0.3V to VDD+0.3V
` Input Current, VDD ...................20mA
` Power Dissipation, P<sub>D</sub> @ T<sub>A</sub> = 25°C
    SOT-26 ......................... 0.25W
` Operating Junction Temperature Range ... -40°C ~ 125°C
` Storage Temperature Range......... -65°C ~ 125°C
` Package Thermal Resistance
    SOT-26, _JA .....................250°C /W
` Lead Temperature (Soldering, 5sec.).......... 260°C


Description

The RT9801 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (P) or digital systems. It provides user programmable threshold levels with 0.1V step ranging from 1.5V to 5V, which covers most digital applications. It features low supply current of 3A. Selection of V_TH is easily achieved through 3 pins
connected to GND, VDD or floating for different threshold voltage settings. Two versions of threshold voltages, 1.5V ~ 4V and 2.5V ~ 5V, which are programmed in factory are offered by customer demands.

The RT9801 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a preset threshold level. This reset signal will last the whole period before VDD recovering. Reset signal will release after VDD is recovered and lasts for the whole period of Reset Active Time-out period.

RT9801 is N-channel, open-drain output and provided in SOT-26 package.