3-Pin Microprocessor Reset Monitor
(Preliminary)
Electrical Characteristics
Vcc=5V for L/M/J ;3.3V for T/S ;3.0V for R ,T
A
= 25°C, unless otherwise specified.
SE809
Symbol
V
CC
I
CC
Parameter
Input Voltage
Supply Current
Condition
Min
2.0
--
Typ
Max
5.5
Unit
V
μA
7
4.63
4.38
4.00
3.08
2.93
2.63
2.25
30
10
4.72
4.47
4.08
3.14
2.99
2.68
2.33
--
SE809L-4.63V
SE809M-4.38V
SE809J-4.00V
V
TH
Reset Threshold
SE809T-3.08V
SE809S-2.93V
SE809R-2.63V
SE809R-2.30V
Reset Threshold Temperature
Coefficient
(4)
4.54
4.29
3.92
3.02
2.87
2.58
2.18
--
V
ppm/°C
V
CC
to Reset Delay V
CC
= V
TH
to (V
TH
–
100mV)
Reset Active Timeout Period
V
OL
V
OH
RESET Output Voltage Low
RESET Output Voltage High
I
SINK
= 3mA
I
SOURCE
= 800μA
--
--
--
0.8V
CC
20
200
--
--
--
μsec
msec
0.4
--
V
V
PIN DESCRIPTION:
Pin No.
1
2
Symbol
GND
RESET
Description
Ground
RESET output remains low while Vcc is below the reset voltage
threshold and for 200msec(typ) after Vcc rises above reset threshold
3
Vcc
Supply Voltage (typ.)
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 T
A
(ambient temperature) is calculated using: P
D(MAX)
=
(T
J(MAX)
– T
A
)/Θ
JA
.
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
SEAWARD [ Seaward Electronics Inc. ]
