RT9818G-12PVL中文资料

Function Block Diagram
VDD
VSET
CMP
Timer
Threshold Voltage Setting
POR
Power On Reset
RESET/ RES9818-05 March 2007
元器件交易网
450ms Options z Low Functional Supply Voltage 0.9V z N-Channel Open-Drain Output z Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89
Packages z RoHS Compliant and 100% Lead (Pb)-Free
NC
4
3
1
2
RESET/ RESET
VDD
SC-82
RESET/
RESET
NC
4
3
1
2
VDD
GND
SC-82 (R-Type)
(TOP VIEW)
VDD
3
1
2
GND
RESET/ RESET
SC-70-3
VDD
3
1
2
RESET/ RESET
GND
SOT-23-3
VDD
3
1
2
GND
RESET/ RESET
`Suitable for use in SnPb or Pb-free soldering processes. `100%matte tin (Sn) plating.
1
元器件交易网
RT9818
Pin Configurations
GND
元器件交易网
RT9818
Micro-Power Voltage Detectors
General Description
The RT9818 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (μP) or digital systems. It provides internally fixed threshold levels with 0.1V per step ranging from 1.2V to 5V, which covers most digital applications. It features low supply current of 3μA. The RT9818 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 upcrossing the threshold level, the reset signal will be released after a certain delay time. RT9818 is provided in SC-82, SC-70-3, SOT-23-3, SOT-23-5 and SOT-89 packages.
Applications
z Computers z Controllers z Intelligent Instruments z Critical μP and μC Power Monitoring z Portable/Battery-Powered Equipment
Marking Information
Typical Application Circuit
VDD μP
RESET/ RESET
100k Pull Up
RT9818 GND
VDD
RESET/ RESET
Note : RichTek Pb-free and Green products are :
`RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
RT9818
Absolute Maximum Ratings (Note 1)
z Terminal Voltage (with Respect to GND)
VDD ------------------------------------------------------------------------------------------------------------------------ −0.3V to 6.0V z All Other Inputs -------------------------------------------------------------------------------------------------------- −0.3V to VDD+0.3V
SOT-23-3 (L-Type)
NC
NC
5
4
123
RESET/ VDD GND RESET
SOT-23-5
1
2
3
RESET/ VDD GND RESET
SOT-89
Note : There is no pin1 indicator on top mark for SC-82 type, and pin 1 will be lower left pin when reading top mark from left to right. Pin2 of SC-82 is wider than other pins.
cial Standard)
Threshold Voltage 12 : 1.2V 13 : 1.3V
: 49 : 4.9V 50 : 5.0V
Reset Active Timeout Period A = 0ms (RESET) B = 55ms (RESET) C = 220ms (RESET) D = 450ms (RESET) E = 0ms (RESET) F = 55ms (RESET) G = 220ms (RESET) H = 450ms (RESET)
DS9818-05 March 2007
Features
z Internally Fixed Threshold 1.2V to 5V in 0.1V Step z High Accuracy ±1.5% z Low Supply Current 3μA z No External Components Required z Quick Reset within 20μs z Built-in Recovery Delay Include 0ms, 55ms, 220ms,
For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail.
z Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 125°C
z ESD Susceptibility (Note 2) HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
z Input Current, IVDD ----------------------------------------------------------------------------------------------------- 20mA z Power Dissipation, PD @ TA = 25°C
Ordering Information
RT9818 -
Package Type U3 : SC-70-3 V : SOT-23-3 VL : SOT-23-3 (L-Type) B : SOT-23-5 X : SOT-89 Y : SC-82 YR : SC-82 (R-Type)
Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer-
Functional Pin Description
Pin Name GND RESET RESET VDD
Pin Function Ground Active Low Open-Drain Reset Output Active High Open-Drain Reset Output Power Pin
SC-70 / SC-82 ---------------------------------------------------------------------------------------------------------- 0.25W SOT-23-3 ---------------------------------------------------------------------------------------------------------------- 0.4W SOT-23-5 ---------------------------------------------------------------------------------------------------------------- 0.4W SOT-89 ------------------------------------------------------------------------------------------------------------------- 0.55W z Package Thermal Resistance (Note 4) SC-70 / SC-82, θJA ---------------------------------------------------------------------------------------------------- 400°C/W SOT-23-3, θJA ----------------------------------------------------------------------------------------------------------- 250°C/W SOT-23-5, θJA ----------------------------------------------------------------------------------------------------------- 250°C/W SOT-89, θJA ------------------------------------------------------------------------------------------------------------- 180°C/W z Lead Temperature (Soldering, 10sec.) ---------------------------------------------------------------------------- 260°C