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V6309SSP3B+

Description
3-Pin Microprocessor Reset Circuit
File Size706KB,6 Pages
ManufacturerEMMICRO
Websitehttp://www.emmicroelectronic.com
Download Datasheet View All

V6309SSP3B+ Overview

3-Pin Microprocessor Reset Circuit

R
EM MICROELECTRONIC -
MARIN SA
V6309
V6319
3-Pin Microprocessor Reset Circuit
Description
The V6309 and V6319 are microprocessor supervisory
circuits used to monitor the power supplies in
µP
and digital
systems. They provide excellent circuit reliability and low
cost by eliminating external components and adjustments
when used with 5V powered or 3V powered circuits.
These circuits perform a single function: they assert a reset
signal whenever the V
DD
supply voltage declines below a
preset threshold, keeping it asserted for at least 140ms after
V
DD
has risen above the reset threshold. The only difference
between the two devices is that the V6309 has an active-low
RESET output (which is guaranteed to be in the correct
state for V
DD
down to 1V), while the V6319 has an active-
high RESET output. The reset comparator is designed to
ignore fast transients on V
DD
. Reset thresholds suitable for
operation with a variety of supply voltages are available.
Low supply current makes the V6309/V6319 ideal for use in
portable equipment. The V6309/V6319 come in a 3-pin
SOT23 package.
Features
!
Precision monitoring of 3V, 3.3V and 5V power supply
voltages
!
Fully specified over the temperature range of
-40 to +125°C
!
140ms minimum power-on reset pulse width:
RESET output for V6309
RESET output for V6319
!
16
µA
supply current
!
Guaranteed RESET/RESET valid to V
DD
= 1V
!
Power supply transient immunity
!
No external components needed
!
3-pin SOT23 package
!
Fully compatible with MAX809/MAX810
Applications
!
!
!
!
!
Computer
Controllers
Intelligent instruments
Critical
µP
and
µC
power monitoring
Portable/battery-powered equipment
Typical Operating Configuration
V
DD
V
DD
V6309
RES
V
DD
Micro-
processor
RES
Pin Assignment
SOT23-3L
V
DD
3
V6309/19
1
2
V
SS
V
SS
V
SS
RES / RES
Fig. 1
Fig. 2
Pin Description
Pin
1
2
Name
V
SS
for V6309
Function
Ground
RESET
2
for V6319
RESET
VDD
RESET
Output remains low while
V
DD
is below the reset threshold and
rises for 240ms after V
DD
above the
reset threshold
RESET Output remains high while
V
DD
is below the reset threshold and
rises for 240ms after V
DD
above the
reset threshold
Supply voltage (+5V, +3.3V or
+3.0V)
Table 1
3
Copyright © 2006, EM Microelectronic-Marin SA
03/06 – rev.G
1
www.emmicroelectronic.com
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