SE809 datasheet(3/5 Pages) SEAWARD

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Revision 1/7/2008

Preliminary and all contents are subject to change without prior notice.

SE809

3-Pin Microprocessor Reset Monitor

(Preliminary)

Electrical Characteristics

Vcc=5V for L/M/J ;3.3V for T/S ;3.0V for R ,TA = 25°C, unless otherwise specified.

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VCC

Input Voltage

2.0

5.5

ICC

Supply Current

μA

VTH

Reset Threshold

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

Reset Threshold Temperature

Coefficient

(4)

ppm/°C

VCC to Reset Delay VCC = VTH to (VTH –

100mV)

μsec

Reset Active Timeout Period

200

msec

VOL

RESET Output Voltage Low

ISINK = 3mA

0.4

VOH

RESET Output Voltage High

ISOURCE = 800μA

0.8VCC

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.

PIN DESCRIPTION:

Pin No.

Symbol

Description

GND

Ground

RESET

RESET output remains low while Vcc is below the reset voltage

threshold and for 200msec(typ) after Vcc rises above reset threshold

Vcc

Supply Voltage (typ.)

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