RT9808-25CV Richtek Technology Corporation, RT9808-25CV Datasheet

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RT9808-25CV

Manufacturer Part Number
RT9808-25CV
Description
2.5V micro-power voltage detector
Manufacturer
Richtek Technology Corporation
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
RT9808-25CV
Manufacturer:
RICHTEK
Quantity:
137
Part Number:
RT9808-25CV
Manufacturer:
RICHTEK/立锜
Quantity:
20 000
General Description
The RT9808 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 1.5V to 5V, which covers most digital
applications. It features low supply current of 3µA.
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.
Applications
Ordering Information
RT9808-
DS9808-01 January 2002
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Operating temperature range
C: Commercial standard
Reset Threshold
15 : 1.5V
16 : 1.6V
49 : 4.9V
50 : 5.0V
Package Type
V : SOT-23
X : SOT-89
B : SOT-25
:
Preliminary
Micro-Power Voltage Detectors
Features
Pin Configurations
Typical Application Circuit
RT9808-
(Plastic SOT-23)
RT9808-
(Plastic SOT-89)
RT9808-
(Plastic SOT-25)
Part Number
Internally Fixed Threshold 1.5V to 5V in 0.1V Step
± ± ± ± 2% Accuracy
Low Supply Current 3µ µ µ µ A
Quick Reset within 20µ µ µ µ S
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
VDD
µ P
RESET
CV
CX
CB
Pull
Up
100K
Pin Configurations
1
5
1
1
3
2
2
2
4
3
GND
www.richtek-ic.com.tw
RESET
3
RT9808
RT9808
TOP VIEW
1. RESET
2. GND
3. VDD
TOP VIEW
TOP VIEW
1. RESET
2. VDD
3. GND
4. NC
5. NC
1. RESET
2. VDD
3. GND
VDD
1

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RT9808-25CV Summary of contents

Page 1

... General Description The RT9808 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 1.5V to 5V, which covers most digital applications. It features low supply current of 3µA. ...

Page 2

... RT9808 Pin Description Pin Name Pin Function GND Ground Pin RESET Reset Pulse Output, Negative Pulse VDD Power Pin NC No Connected Function Block Diagram Threshold Voltage Setting www.richtek-ic.com.tw 2 Preliminary VDD CMP TIMER VSET POR Power On Reset RESET N DS9808-01 January 2002 ...

Page 3

... SINK -0.3V to 6.0V -0.3V to VDD+0.3V 20mA 20mA 0.25W 0.5W 0.25W -40°C ~ 125°C -65°C ~ 125°C 250°C /W 100°C /W 300°C /W 250°C /W 260°C Min Typ 0 OUT -- Note1 -- -- -- -- -- 200 -- 0.4 RT9808 Max Units µ µ www.richtek-ic.com.tw 3 ...

Page 4

... RT9808 (2) Current Consumption RT9808 V SS www.richtek-ic.com.tw 4 Preliminary (3) Output Transistor Current R (100k Ω ) Oscilloscope OUT (4) Dynamic Response OUT V DD 100k Ω CRT OUT RT9808 P OUT DD V RT9808 DS9808-01 January 2002 ...

Page 5

... V (V) DS Nch Driver Output Current vs 2.5V 12 2. (V) DS Output Voltage vs. Input Voltage 25° 3.0V 3 2.4V 2. 0.0 1.0 2.0 3.0 4.0 Input Voltage V IN www.richtek-ic.com.tw RT9808 DS 2.2V 2. 25°C A RT9808-24CV 2 2 4.0V 3.5V 3. 25°C A RT9808-45CV 3 4 5.0V 4.5V 5.0 6.0 (V) 5 ...

Page 6

... Input Voltage V IN Supply Current vs. Input Voltage 5 ° ° ° - Input Voltage V IN Reset Threshold Deviation vs. Temp. 5.1 4.7 4.3 3.9 3.5 3.1 2.7 2.3 1.9 -40 - Temperture ( C) ° DS9808-01 January 2002 RT9808-24CV (V) RT9808-45CV (V) 5V 4. ...

Page 7

... IN Nch Driver Output Current vs. Input Voltage 10 RT9808-24CV 0.5 1 1.5 Input Voltage V Nch Driver Output Current vs. Input Voltage 16 RT9808-45CV ° ° ° Input Voltage V Power-Up reset Timeout vs. Temp. ...

Page 8

... Temperture ( C) Output Delay Time vs. Load Capacitance 1000 100 10 4. 0.0001 0.001 Load Capacitance C DS9808-01 January 2002 V = 150mV drop V = 200mV drop V = 250mV drop RT9808-24CV 60 85 ° 150mV drop V = 250mV drop RT9808-45CV 60 85 ° 2. 25°C A 0.01 0.1 (uF) OUT ...

Page 9

... Max 0.889 1.295 -- 0.152 1.397 1.803 0.356 0.508 2.591 2.997 2.692 3.099 1.803 2.007 0.102 0.254 0.356 0.610 SOT-23 Plastic Surface Mount RT9808 H L Dimensions In Inches Min Max 0.035 0.051 -- 0.006 0.055 0.071 0.014 0.020 0.102 0.118 0.106 0.122 0.071 0.079 ...

Page 10

... RT9808 C C1 Symbol www.richtek-ic.com.tw 10 Preliminary Dimensions In Millimeters Min Max 1.397 1.600 0.356 0.483 2.388 2.591 0.406 0.533 -- 4.242 0.787 1.194 4.394 4.597 1.397 1.753 1.448 1.549 0.381 0.432 3-Lead SOT-89 Surface Mount ...

Page 11

... SOT- 25 Surface Mount Package RT9808 H L Dimensions In Inches Min Max 0.035 0.051 0.000 0.006 0.055 0.071 0.014 0.022 0.102 0.118 0.106 0.122 0.033 ...

Page 12

... RT9808 RICHTEK TECHNOLOGY CORP. Headquarter 6F, No. 35, Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749 www.richtek-ic.com.tw 12 Preliminary RICHTEK TECHNOLOGY CORP. Taipei Office (Marketing) 8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek-ic.com.tw ...

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