CBM705/CBM706/CBM707/CBM708
OPERATION INSTRUCTION
FEATURES
GENERAL DESCRIPTION
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Guaranteed RESET valid with VCC = 1V
The CBM705, CBM706, CBM707, CBM708
microprocessor supervisory circuits are
190 μA quiescent current
suitable
for
monitoring
and
5V
power
Precision supply voltage monitor
4.65 V (CBM705/CBM707)
supplies/batteries
activity.
microprocessor
4.40 V (CBM706/CBM708)
The
CBM705/
CBM706
provide
200 ms reset pulse width
power-supply monitoring circuitry that
generate a reset output during power-up,
power-down, and brownout conditions. The
reset output remains operational with VCC as
low as 1V. Independent watchdog monitoring
circuitry is also provided. This is activated if
the watchdog input has not been toggled
within 1.60 sec.
Debounced TTL/CMOS manual reset
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input (MR)
Independent watchdog timer
(CBM705/CBM706)
1.60 sec timeout (CBM705/CBM706)
Active high reset output
(CBM707/CBM708)
In addition, there is a 1.25V threshold
detector to warn of power failures, to detect
low battery conditions, or to monitor an
additional power supply. An active low,
Voltage monitor for power fail or low
battery warning
Superior upgrade for ADM705 to
ADM708
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debounced manual reset input ( MR ) is also
included.
APPLICATIONS
The CBM705 and CBM706 are identical
except for the reset threshold monitor levels,
which are 4.65V and 4.40V, respectively.
The CBM707 and CBM708 provide a
similar functionality to the CBM705 and
CBM706 and only differ in that a watchdog
timer function is not available. Instead, an
active high reset output (RESET) is available as
Microprocessor systems
Computers
Controllers
Intelligent instruments
Critical microprocessor supply
monitoring
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well as the active low reset output ( RESET ).
The CBM707 and CBM708 are identical except
for the reset threshold monitor levels, which
are 4.65V and 4.40V, respectively.
All devices are available in narrow 8-lead
SOIC packages.
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