SP691ACN SIPEX [Sipex Corporation], SP691ACN Datasheet - Page 9

• Manufacturer Part Number: SP691ACN
• Description: Low Power Microprocessor Supervisory with Battery Switch-Over
• Manufacturer: SIPEX [Sipex Corporation]

Pin 12 — CE
Pin 13 — CE
Pin 14 — WDO — Watchdog Output. If WDI
Figure 16. Internal Block Diagram of the SP691A/693A/800L/800M
Date: 5/25/04
OSC
OSC
V
output pin goes LOW only when CE
LOW and V
voltage. If CE
asserted, this output pin will stay low for
16µs or until CE
occurs first.
input pin to the chip-enable gating circuit.
If this input pin is not used, connect it to
ground or V
remains HIGH or LOW longer than the
watchdog timeout period, this output pin
goes LOW and RESET is asserted for the
reset timeout period. This output pin returns
HIGH on the next transition at WDI.
This output pin remains HIGH if WDI is
unconnected.
CE
WDI
BATT
V
PFI
SEL
CC
IN
IN
11
13
8
7
4.65V or
3
9
1
4.40V*
IN
*
OUT
4.65V for the SP691A/800L
4.40V for the SP693A/800M
— Chip-Enable Input. This is the
SP691A/693A/800L/800M Low Power Microprocessor Supervisor with Battery Switch-Over © Copyright 2004 Sipex Corporation
Watchdog
Watchdog
Timebase
Transition
Detector
OUT
Reset /
CC
— Chip-Enable Output. This
is above the reset threshold
.
IN
IN
is LOW when RESET is
goes HIGH, whichever
Watchdog
Timer
1.25V
IN
is
9
Generator
Control
Reset
CE
Pin 15 — RESET — Active LOW Reset Output.
Pin 16 — RESET — Active HIGH Reset
OUT
This output pin goes LOW whenever V
falls below the reset threshold. This output
pin will remain low typically for 200ms after
V
power-up.
Output. This output pin is open drain and
the inverse of RESET.
CC
crosses the reset threshold voltage on
14
15
16
12
10
6
5
4
2
GND
RESET
PFO
WDO
RESET
LOWLINE
BATT ON
V
CE
OUT
OUT
CC