imp706resa A1 PROs co., Ltd., imp706resa Datasheet - Page 5

• Manufacturer Part Number: imp706resa
• Description: 3/3.3/4.0v ?p Supervisor Circuits
• Manufacturer: A1 PROs co., Ltd.

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DIP/SO MicroSO DIP/SO MicroSO DIP/SO MicroSO Name
Power-fail detector
Brownout detection
Debounced manual RESET input
Power-up/down RESET
Watchdog timer
Active-HIGH RESET
Active-LOW RESET
Active-LOW and HIGH RESETs
RESET threshold
1999 IMP, Inc.
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1
2
3
4
5
6
8
7
IMP706P
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3
4
5
6
7
8
2
1
IMP706R/S/T/J IMP708R/S/T/J
Pin Number
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1
2
3
4
5
6
7
8
IMP706P IMP706R IMP706S IMP706T IMP706J IMP708R IMP708S IMP708T IMP708J
2.63V
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3
4
5
6
7
8
1
2
2.63V
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1
2
3
4
5
6
7
8
408-432-9100/www.impweb.com
IMP706P/R/S/T/J, IMP708R/S/T/J
IMP706P/R/S/T/J, IMP708R/S/T/J
2.93V
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4
5
6
7
8
1
2
3.08V
RESET
RESET
WDO
GND
PFO
WDI
V
MR
PFI
NC
CC
Manual reset input. The active LOW input triggers
a reset pulse. It is pulled HIGH by a 20k pull-up
resistor. It is compatible with TTL/CMOS signals
when V
through a mechanical switch. Leave floating or
connect to V
Monitored power supply input.
Ground
Power-fail input voltage monitor. With PFI less than
1.25V, PFO goes LOW. Connect PFI to ground
when not used.
Power-fail output. The output is active LOW and
used, leave the pin unconnected.
Watchdog input. WDI controls the internal watchdog
timer. A HIGH or LOW signal for 1.6 sec at WDI
allows the internal timer to run-out, setting WDO low.
A rising or falling edge must occur at WDI within
1.6 seconds or WDO goes LOW. The watchdog
function is disabled by floating WDI. The internal
watchdog timer clears when: RESET is asserted;
WDI is three-stated; or WDI sees a rising or falling edge.
Not connected.
Active-LOW reset output. Pulses LOW for 200ms
when triggered, and stays LOW whenever V
below the reset threshold. RESET remains LOW for
200ms after V
or MR goes from HIGH to LOW. A watchdog timeout
will not trigger RESET unless WDO is connected to MR.
Watchdog output. WDO goes LOW when the 1.6
second internal watchdog timer times-out and does
not go HIGH until a transition occurs at WDI. In
addition, when V
WDO goes LOW. Unlike RESET, WDO does not have
a minimum pulse width and as soon as V
the reset threshold, WDO becomes HIGH with no delay.
Active-HIGH reset output. RESET is the inverse of
RESET.
4.00V
sinks current when PFI is less than 1.25V. If not
CC
= 5V. It can be shorted to ground
2.63V
CC
CC
if the function is not used.
CC
rises above the RESET threshold
Function
falls below the reset threshold,
2.93V
Feature Summary
Pin Descriptions
3.08V
CC
CC
exceeds
4.00V
is
5