RT9811-33CB [ETC]
RT9811-47CB;
| 型号： | RT9811-33CB |
| 厂家： | 
ETC |
| 描述： | RT9811-47CB |
| 文件： | 总6页 (文件大小：149K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary
RT9811
Micro-Power Voltage Detectors
General Description
Features
The RT9811 is a micro-power voltage detector with
de-glitched manual reset input 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 2.5µA.
z Internally Fixed Threshold 1.5V to 5V in 0.1V
Step
z
2% Accuracy
z Low Supply Current 2.5µA
z No External Components Required
z Quick Reset within 20µS
z Built-in Recovery Delay 400mS
z 100nS Glitch Immunity of Manual Reset Input
z Low Functional Supply Voltage 0.9V
z Small 4-Pin SOT-25 Package
The RT9811 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 after a certain delay
time. A 5% hysteresis splits the rising and falling
threshold levels. To pull reset signal low manually,
just pull the manual reset input (MR) below the
Pin Configurations
Part Number
Pin Configurations
TOP VIEW
RT9811-ꢀꢀCB
(SOT-25)
5
1
4
3
1. GND
2. NC
3. RESET
4. MR
specified V level.
IL
2
5. VDD
RT9811 is provided in SOT-25 package.
Typical Application Circuit
Applications
z Computers
z Controllers
VDD
RT9811
GND
z Intelligent Instruments
z Critical µP and µC Power Monitoring
z Portable/Battery-Powered Equipment
VDD
MR
P
µ
RESET
RESET
Ordering Information
RT9811-ꢀꢀ ꢀ ꢀ
Package Type
B : SOT-25
Operating temperature range
C: Commercial standard
Reset Threshold
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
DS9811-00 June 2001
www.richtek-ic.com.tw
1
RT9811
Preliminary
Pin Description
Pin Name
GND
Pin Function
Ground Pin
NC
Not Connected
RESET
MR
Reset Pulse Output, Negative Pulse
Manual Reset Input, Pull Low to Reset, Internally Pulled High with 1µA Current Source
VDD
Power Pin
Function Block Diagram
VDD
P
VDD
CMP
RESET
TIMER
VSET
N
Threshold Voltage Setting
POR
Power On Reset
MR
MR
Manual Reset
www.richtek-ic.com.tw
DS9811-00 June 2001
2
Preliminary
RT9811
Absolute Maximum Ratings
z Terminal Voltage (with Respect to GND)
VDD
-0.3V to 6.0V
All Other Inputs
z Input Current, VDD
z MR
-0.3V to VDD+0.3V
20mA
1mA
z Output Current, RESET
20mA
z Power Dissipation, P @ T = 25°C
D
A
SOT-25
0.25W
z Operating Junction Temperature Range
z Storage Temperature Range
-40°C ~ 125°C
-65°C ~ 125°C
z Package Thermal Resistance
SOT-25, θ
z Lead Temperature (Soldering, 5sec.)
250°C /W
260°C
JA
Electrical Characteristics
(VDD = 3.0, unless specified)
Parameter
Symbol
Test Conditions
Min
0.9
--
Typ
--
Max
6
Units
V
Operating VDD (V
Supply Current
) Range
V
DD
OUT
2.5
Note1
--
--
I
V
= 1.5V ~ 5V, I = 0
OUT
µA
V
DD
DD
Reset Threshold
--
--
V
TH
T = 27°C
A
Threshold Voltage Accuracy
--
2
%
∆V
T = 27°C
TH
A
--
25
--
V
V
V
= 5V, Drop = -20mV
= 1.5V, Drop = -20mV
DD
DD
DD
V
Drop to Reset Delay
t
µS
CC
RD
--
5
--
Reset Active Time Out Period
MR Minimum Pulse Width
MR to Reset Delay
--
400
400
0.8
100
--
mS
mS
µS
t
t
t
≥ 1.02×V
TH
RP
MR
MD
--
--
Determined by t
RP
--
--
MR Glitch Immunity
--
--
nS
--
--
V
V
V
V
V
= 3.3V
0.85V
IH
DD
DD
DD
DD
DD
MR Input Threshold
V
V
--
--
0.2V
0.8V
0.2V
IL
--
--
V
V
> V , I
> 1mA
OH
OL
DD
TH SOURCE
RESET Output Voltage
--
--
< V , I
> 3.5mA
DD
TH SINK
Note1: 1.5V ~ 5V, step 0.1V
DS9811-00 June 2001
www.richtek-ic.com.tw
3
RT9811
Package Information
Preliminary
D
b
C
B
H
A
L
e
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
Max
Min
Max
A
A1
B
0.889
0.000
1.397
0.356
2.591
2.692
0.838
0.102
0.356
1.295
0.152
1.803
0.559
2.997
3.099
1.041
0.254
0.610
0.035
0.000
0.055
0.014
0.102
0.106
0.033
0.004
0.014
0.051
0.006
0.071
0.022
0.118
0.122
0.041
0.010
0.024
b
C
D
e
H
L
SOT- 25 Surface Mount Package
www.richtek-ic.com.tw
DS9811-00 June 2001
4
Preliminary
RT9811
DS9811-00 June 2001
www.richtek-ic.com.tw
5
RT9811
Preliminary
RICHTEK TECHNOLOGY CORP.
Headquarter
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
6F, No. 35, Hsintai Road, Chupei City
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Hsinchu, Taiwan, R.O.C.
Taipei County, Taiwan, R.O.C.
Tel: (8863)5510047 Fax: (8863)5537749
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek-ic.com.tw
www.richtek-ic.com.tw
DS9811-00 June 2001
6
相关型号：
©2020 ICPDF网 联系我们和版权申明