SE809 [SEAWARD]
3-Pin Microprocessor Reset Monitor; 3引脚微处理器复位监控器
| 型号： | SE809 |
| 厂家： | 
Seaward Electronics Inc. |
| 描述： | 3-Pin Microprocessor Reset Monitor |
| 文件： | 总5页 (文件大小：179K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3-Pin Microprocessor Reset Monitor
(Preliminary)
SE809
Description
Features
The SE809 is
a
cost-effective system
¾
Precision VCC Monitor for 2.8V, 3.0V, 3.3V, and
5.0V Supplies
supervisor Integrated Circuit (IC) designed to
monitor VCC in digital and mixed signal systems and
provide a warning signal when the system power
supply is out of working range, and a reset signal to
the host processor when necessary. No external
components are required.
¾
¾
¾
¾
¾
¾
¾
¾
200mSec typical RESET Output Delay.
RESET Output Guaranteed to VCC=1.0V
Low 7μA Supply Current typical.
VCC Transient Immunity
Small SOT-23 Package and TO-92 Package
No External Components
The reset output is driven active within 20μsec
of VCC falling through the reset voltage threshold.
Reset is maintained active after VCC rises above the
reset threshold. The SE809 has an active-low
RESET output. The output of the SE809 is
guaranteed valid down to VCC=1V.
Wide Operating Temperature: 0°C to 85°C
100% Lead (Pb)-Free
The SE809 is optimized to reject fast transient
glitches on the VCC line. Low supply current of 18μA
(VCC=3.3V) makes these devices suitable for battery
powered applications. The output voltages range
from 1.7V to 4.5V in 100mV increments. Standard
voltage versions are 2.30, 2.63, 2.93, 3.08, 4.0,
4.38, and 4.63V.
Application
¾
¾
¾
¾
Computers
Embedded systems
Battery powered equipment
Critical µP power supply monitoring
Pin Configuration
Application Diagram
Revision 1/7/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2007. • www.seawardinc.com
1
3-Pin Microprocessor Reset Monitor
(Preliminary)
SE809
Ordering/Marking Information (SOT23)
Ordering Information
Marking Information
S809xa•
SE809xS
The “x” denotes a suffix for VCC threshold.
Suffix
Reset VCC threshold(V)
The last character is the batch number.
A dot on top right corner is for lead-free
L
M
J
4.63
4.38
4.00
3.08
2.93
2.63
process.
T
S
R
Ordering/Marking Information (TO92)
Ordering Information
Marking Information
SE809Z
XXXX is the batch number.
Lead-free package is indicated by LF after
XXXX.
SE809Z
XXXX-LF
Suffix
Reset VCC threshold(V)
2.30
Z
Absolute Maximum Ratings(1)
Parameter
Symbol
VCC
Value
Units
V
Input Voltage
5.5
Output Voltage
RESET
-0.3 to (VCC + 0.3)
V
Input Current
20
20
mA
mA
Output Current
IOUT
PD
Power Dissipation
Internally Limited (3)
Output Short Circuit Duration
Thermal Resistance, Junction-to-Ambient
Operating Temperature Range
Lead Temperature (Soldering, 10 sec.)
Junction Temperature
Storage Temperature
Infinite
ΘJA
230
°C/W
℃
TA
0 ~ 85
260
°C
TJ
0 to +125
-60 to +150
°C
TS
°C
Operating Rating(2)
Parameter
Symbol
VCC
Value
Units
Supply Input Voltage
Junction Temperature
+2.0V to +5.5
0 to +125
V
TJ
°C
Revision 1/7/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2007. • www.seawardinc.com
2
3-Pin Microprocessor Reset Monitor
(Preliminary)
SE809
Electrical Characteristics
Vcc=5V for L/M/J ;3.3V for T/S ;3.0V for R ,TA = 25°C, unless otherwise specified.
Symbol
VCC
Parameter
Input Voltage
Supply Current
Condition
Min
2.0
Typ
Max
Unit
V
5.5
10
ICC
--
7
μA
SE809L-4.63V
SE809M-4.38V
SE809J-4.00V
SE809T-3.08V
SE809S-2.93V
SE809R-2.63V
SE809R-2.30V
4.54
4.29
3.92
3.02
2.87
2.58
2.18
4.63
4.38
4.00
3.08
2.93
2.63
2.25
4.72
4.47
4.08
3.14
2.99
2.68
2.33
VTH
Reset Threshold
V
Reset Threshold Temperature
Coefficient(4)
--
--
30
20
--
--
ppm/°C
VCC to Reset Delay VCC = VTH to (VTH
100mV)
–
μsec
Reset Active Timeout Period
RESET Output Voltage Low
RESET Output Voltage High
--
--
200
--
msec
VOL
VOH
ISINK = 3mA
0.4
--
V
V
ISOURCE = 800μA
0.8VCC
--
PIN DESCRIPTION:
Pin No.
Symbol
Description
Ground
RESET output remains low while Vcc is below the reset voltage
1
2
GND
RESET
threshold and for 200msec(typ) after Vcc rises above reset threshold
Supply Voltage (typ.)
3
Vcc
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guaranteed to function outside its operating rating.
Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX)
=
(TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature,
and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details
Note 4: RESET threshold temperature coefficient is the worst case voltage change divided by the total temperature
range.
Revision 1/7/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2007. • www.seawardinc.com
3
3-Pin Microprocessor Reset Monitor
(Preliminary)
SE809
OUTLINE DRAWING SOT-23
C
B
DIMENSIONS
INCHES
MIN MAX MIN MAX
J
H
MM
N
DIM
0.110 0.120 2.80
0.047 0.055 1.20
0.083 0.104 2.10
0.035 0.040 0.89
0.070 0.080 1.78
0.018 0.024 0.45
0.015 0.020 0.37
0.0005 0.004 0.013 0.10
0.034 0.040 0.887 1.02
0.003 0.007 0.085 0.18
3.04
1.40
2.64
1.03
2.05
0.60
0.51
A
B
C
D
E
F
G
H
J
D
A
E
G
F
K
K
L
L
-
0.027
-
0.69
OUTLINE DRAWING TO-92
DIMENSIONS
INCHES
A
MM
DIMN
B
D
MIN MAX MIN MAX
0.175 0.205 4.445 5.207
0.170 0.210 4.318 5.334
0.500 0.610 12.70 15.50
0.016 0.021 0.407 0.533
0.045 0.055 1.143 1.397
0.095 0.105 2.413 2.667
0.080 0.105 2.032 2.667
0.125 0.165 3.175 4.191
A
B
E
F
G
H
J
E
G
F
H
K
K
J
Revision 1/7/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2007. • www.seawardinc.com
4
3-Pin Microprocessor Reset Monitor
(Preliminary)
SE809
Contact Information
Seaward Electronics Incorporated – China
Rm 1605, Building 1, International Pioneering Park, #1 Shangdi Xinxi Rd
Haidian District, Beijing 100085, China
Tel: 86-10-8289-5700/01/05
Fax: 86-10-8289-5706
Email: sales@seawardinc.com.cn
Seaward Electronics Corporation – Taiwan
2F, #181, Sec. 3, Minquan East Rd,
Taipei, Taiwan R.O.C
Tel: 886-2-2712-0307
Fax: 886-2-2712-0191
Email: sales@seawardinc.com.tw
Seaward Electronics Incorporated – North America
1512 Centre Pointe Dr.
Milpitas, CA95035, USA
Tel: 1-408-821-6600
Last Updated - 1/7/2008
Revision 1/7/2008
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2007. • www.seawardinc.com
5
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