RT9808

Features:

`􀁺 Internally Fixed Threshold 1.5V to 5V in 0.1V Step
`􀁺 ±2% Accuracy
`􀁺 Low Supply Current 3A
`􀁺 Quick Reset within 20S
`􀁺 Built-in Recovery Delay 200mS
`􀁺 Low Functional Supply Voltage 0.9V
`􀁺 N-Channel Open Drain Output
`􀁺 Small 3-Pin SOT-23/SOT89 and 5-Pin SOT-25 Packages


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, V_DD ...................20mA
`􀁺 Output Current, RESET................. 20mA
`􀁺 Power Dissipation, PD @ T_A = 25°C
SOT-23 .........................0.25W
SOT-89 ......................... 0.5W
SOT-25 ......................... 0.25W
`􀁺 Operating Junction Temperature Range... -40°C ~ 125°C
`􀁺 Storage Temperature Range........ -65°C ~ 125°C
`􀁺 Package Thermal Resistance
SOT-23, <sub>JA</sub>..................... 250°C /W
SOT-89, <sub>JC</sub>..................... 100°C /W
SOT-89, <sub>JA</sub> .....................300°C /W
SOT-25, <sub>JA</sub> .....................250°C /W
`􀁺 Lead Temperature (Soldering, 5sec.).......... 260°C


Description

The RT9808 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (P) or digital systems. It provides internally fixed threshold levels with 0.1V per step ranging from 1.5V to 5V, which covers most digital applications. It features low supply current of 3A.

The RT9808 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. Once VDD recovered up-crossing the threshold level, the reset signal will be released if VDD is above threshold and last for the whole period of reset active time out.

RT9808 is n-channel, open-drain output.