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SP804REP Datasheet(PDF) 6 Page - Sipex Corporation

Part # SP804REP
Description  3.0V/3.3V Low Power Microprocessor Supervisory with Battery Switch-Over
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP804REP Datasheet(HTML) 6 Page - Sipex Corporation

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SP690T/S/R DS/10
SP690T/S/R, 802/T/S/R, 804T/S/R, 805T/S/R Low Power Microprocessor Supervisory
© Copyright 2000 Sipex Corporation
6
PIN ASSIGNMENTS
Pin 1 —V
OUT — Output Supply Voltage for
CMOS RAM. When V
CC is above the
reset threshold, V
OUT connects to VCC
through a P-channel MOSFET switch.
When V
CC falls below the VSW and
V
BATTERY, VBATTERY connects to VOUT.
Connect to V
CC if no battery is used.
Pin 2 — V
CC — +5V Supply Input
Pin 3 — GND — Ground reference for all
signals
Pin 4 — PFI — Power-Fail Comparator Input.
When PFI is less than 1.25V or when V
CC
falls below the V
SW, PFO goes LOW,
otherwise PFO remains HIGH. Connect
to GND if unused.
Pin 5
— PFO — Power-Fail Comparator
Output. Leave open if unused.
Pin 6 — WDI — Watchdog Input. If WDI
remains HIGH or LOW for 1.6 seconds,
the internal watchdog timer triggers a
reset. The internal watchdog timer clears
when reset is asserted or WDI sees a
rising or falling edge. The watchdog
function cannot be disabled.
Pin 7 for SP690_/802_ only — Active-LOW
Reset Output. — Whenever RESET is
triggered by a watchdog timeout, it goes
LOW for 200ms. It stays LOW whenever
V
CC is below the reset threshold and re-
mains LOW for 200ms after V
CC rises
above the reset threshold or when the
watchdog triggers a reset.
Pin 7 for SP804_/805_ only — Active-HIGH
Open-Drain Reset Output.
The
inverse operation of RESET.
Pin 8 — V
BATTERY — Backup-Battery Input.
When V
CC falls below VSW and VBATTERY,
V
OUT switchesfrom VCC to VBATTERY.
When V
CC rises above the reset threshold,
V
OUT reconnects to VCC. VBATTERY may
exceed V
CC. Connect to VCC if no battery
is used.
VOUT
VCC
GND
PFI
VBATTERY
RESET / RESET*
WDI
PFO
1
2
3
4
5
6
7
8
*SP804T/S/R and SP805T/S/R only
SP690T/S/R
SP802T/S/R
SP804T/S/R
SP805T/S/R
PINOUT


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