廬
EM MICROELECTRONIC-MARIN SA
V6309/V6319
3-Pin Microprocessor Reset Circuit
Features
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Precision monitoring of 3 V, 3.3 V and 5 V power
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Typical Operating Configuration
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supply voltages
Fully specified over the temperature range of
-40 to + 125
o
C
140 ms minimum power-on reset pulse width:
RESET output for V6309
RESET output for V6319
16
碌A(chǔ)
supply current
Garanteed RESET/RESET valid to V
DD
= 1 V
Power supply transient immunity
No external components needed
3-pin SOT-23 package
Fully compatible with MAX809/MAX810 and
AMD809/AMD810
Description
The V6309 and V6319 are microprocessor supervisory cir-
cuits used to monitor the power supplies in 碌P and digital
systems. They provide excellent circuit reliability and low
cost by eliminating external components and adjustments
when used with 5 V powered or 3 V powered circuits.
These circuits perform a single function: they assert a re-
set signal whenever the V
DD
supply voltage declines below
a preset threshold, keeping it asserted for at least 140 ms
after V
DD
has risen above the reset threshold. The only dif-
ference 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 1 V), while the V6319 has an
active-high RESET output. The reset comparator is de-
signed 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
SOT-23 package
Fig. 1
Pin Assignment
Applications
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Computers
Controllers
Intelligent instruments
Critical
and
碌C
power monitoring
Portable/battery-powered equipment
Fig. 2
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1
2
3
4
5
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