sp690tep-l Exar Corporation, sp690tep-l Datasheet - Page 6

• Manufacturer Part Number: sp690tep-l
• Description: Sp690s -low Power Microprocessor Supervisory With Battery Switch-over
• Manufacturer: Exar Corporation

PINOUT
PIN ASSIGNMENTS
Pin 1 —V
Pin 2 — V
Pin 3 — GND — Ground reference for all
Pin 4 — PFI — Power-Fail Comparator Input.
Pin 5 — PFO — Power-Fail Comparator
Pin 6 — WDI — Watchdog Input. If WDI
SP690T/S/R JAN 30-06
CMOS RAM. When V
reset threshold, V
through a P-channel MOSFET switch.
When V
V
Connect to V
signals
When PFI is less than 1.25V or when V
falls below the V
otherwise PFO remains HIGH. Connect
to GND if unused.
Output. Leave open if unused.
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.
BATTERY
OUT
CC
— +5V Supply Input
— Output Supply Voltage for
CC
, V
SP690T/S/R, 802/T/S/R, 804T/S/R, 805T/S/R Low Power Microprocessor Supervisory
falls below the V
BATTERY
CC
if no battery is used.
SW
OUT
, PFO goes LOW,
GND
V
connects to V
V
PFI
connects to V
OUT
CC
CC
is above the
1
2
4
3
SW
SP690T/S/R
SP802T/S/R
SP804T/S/R
SP805T/S/R
OUT
and
CC
CC
.
6
*
SP804T/S/R and SP805T/S/R only
Pin 7 for SP690_/802_ only — Active-LOW
Pin 7 for SP804_/805_ only — Active-HIGH
Pin 8 — V
8
7
6
5
Reset Output. — Whenever RESET is
triggered by a watchdog timeout, it goes
LOW for 200ms. It stays LOW whenever
V
mains LOW for 200ms after V
above the reset threshold or when the
watchdog triggers a reset.
Open-Drain Reset Output.
inverse operation of RESET.
When V
V
When V
V
exceed V
is used.
CC
OUT
OUT
RESET / RESET*
V
PFO
WDI
BATTERY
is below the reset threshold and re-
reconnects to V
BATTERY
switchesfrom V
CC
CC
CC
falls below V
rises above the reset threshold,
. Connect to V
— Backup-Battery Input.
© 2006 Sipex Corporation
CC
CC
SW
. V
CC
and V
to V
BATTERY
if no battery
—
BATTERY
BATTERY
CC
rises
may
The
,
.