SP691ACP Exar Corporation, SP691ACP Datasheet

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SP691ACP

Manufacturer Part Number
SP691ACP
Description
Manufacturer
Exar Corporation
Datasheet
Date: 4/18/05
FEATURES
The SP691A/693A/800L/800M is a microprocessor (µP) supervisory circuit that integrates
a myriad of components involved in discrete solutions to monitor power-supply and
battery-control functions in µP and digital systems. The SP691A/693A/800L/800M offers
complete µP monitoring and watchdog functions. The SP691A/693A/800L/800M is ideal for
a low-cost battery management solution and is well suited for portable, battery-powered
applications with its supply current of 35µA. The 6ns chip-enable propagation delay,
the 25mA current output in battery-backup mode, and the 250mA current output in
standard operation also makes the SP691A/693A/800L/800M suitable for larger scale,
high-performance equipment.
100ms, 1.6s Or Adjustable Watchdog Time
Voltage Monitor for Power-Fail or Low Battery
Precision 4.65V/4.40V Voltage Monitoring
200ms Or Adjustable Reset Time
60µA Maximum Operating Supply Current
2.0µA Maximum Battery Backup Current
0.1µA Maximum Battery Standby Current
Power Switching
On-Board Gating of Chip-Enable Signals
Backup-Battery Monitor
RESET Valid to Vcc=1V
1% Accuracy Guaranteed (SP800L/800M)
Pin Compatible Upgrade to MAX691A/693A/
250mA Output in Vcc Mode (0.6Ω)
25mA Output in Battery Mode (5Ω)
Memory Write-Cycle Completion
6ns CE Gate Propagation Delay
800L/800M
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SP691A/693A/800L/800M Low Power Microprocessor Supervisor with Battery Switch-Over © Copyright 2005 Sipex Corporation
Low Power Microprocessor Supervisory
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Now Available in Lead Free Packaging
LOWLINE
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DESCRIPTION
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SP691ACP Summary of contents

Page 1

Low Power Microprocessor Supervisory FEATURES Precision 4.65V/4.40V Voltage Monitoring 200ms Or Adjustable Reset Time 100ms, 1.6s Or Adjustable Watchdog Time 60µA Maximum Operating Supply Current 2.0µA Maximum Battery Backup Current 0.1µA Maximum Battery Standby Current Power Switching 250mA Output ...

Page 2

These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods ...

Page 3

V = +4.75V to +5.5V for the SP691A/800L noted. Typical values apply AMB ...

Page 4

V = +4.75V to +5.5V for the SP691A/800L noted. Typical values apply AMB ...

Page 5

V = +4.75V to +5.5V for the SP691A/800L noted. Typical values apply AMB NOTE 1: Either can go to 0V, if the other is greater than 2.0V. CC BATT ...

Page 6

V = 4.5V 0 2.8V BATT 0.7 0.5 0.3 -60 - Temperature ( o C) Figure On-Resistance vs. Temperature CC OUT 4. BATT 4.68 4.67 4.66 4.65 ...

Page 7

Long Watchdog Timeout Period Reset Active Timeout Period Short Watchdog Timeout Period 100 10 1 0.1 10 100 1000 OSCIN Capacitor (pF) Figure 11. Watchdog and Reset Timeout Period vs. OSC Timing Capacitor ( OSC 1000 100 ...

Page 8

TOP VIEW BATT OUT Vcc 3 14 GND 4 13 Corporation BATT LOWLINE OSC IN OSC 8 9 SEL DIP/SO PIN ASSIGNMENTS Pin 1 — V — ...

Page 9

Pin 12 — CE — Chip-Enable Output. This OUT output pin goes LOW only when CE LOW and V is above the reset threshold CC voltage LOW when RESET is IN asserted, this output pin will stay ...

Page 10

Regulated + RESET µP NMI I/O LINE A0-A15 Address BUS Decode CMOS RAM RAM n 0.1µF Figure 17. Typical Application Circuit of the SP691A/693A/800L/800M The SP691A/693A/800L/800M devices are microprocessor (µP) supervisory circuits that monitor ...

Page 11

Watchdog function Monitors µP activity where the watchdog output goes to a logic LOW state if the watchdog input is not toggled for greater than the timeout period. 5) Internal switch Switches over from the ...

Page 12

WDI WDO RESET Figure 20. Watchdog Timeout Period and Reset Active Time Watchdog Function The watchdog monitors µP activity via the Watchdog Input (WDI). If the µP becomes inactive, RESET and RESET are asserted. ...

Page 13

...

Page 14

V CE BATT 2.8V CE OUT 12 4 GND Figure 22. Chip Enable Propagation Delay Test Circuit Chip-Enable Output In the enabled mode, the impedance equivalent to 65Ω in series with the source driving ...

Page 15

...

Page 16

Vcc 1N4148 BATT 0.47F Corporation GND 4 Figure 25. High Capacity Capacitor on V Continuous current should be limited to 25mA and peak currents (only during power-up) limited to 250mA. The reverse leakage of this ...

Page 17

Minimum value of R Maximum value the connected number of RAMs OUT GND OUT 4 12 Active-HIGH CE Logic Lines for Memory Devices Figure 26. Alternate ...

Page 18

V CC PFI PFO GND 1. 5 PFO + TRIP * negative voltage TRIP Figure 28. Monitoring a Negative Voltage Negative-Going V Transients CC While asserting resets ...

Page 19

Watchdog Software Considerations A way to help the watchdog timer keep a closer watch on software execution involves setting and resetting the watchdog input at different points in the program, rather than "pulsing" the watchdog input high-low-high or low-high-low. This ...

Page 20

D e E/2 1 INDEX AREA (D/2 X E1/2) TOP VIEW 16 Pin NSOIC JEDEC MO-012 (AC) Variation MIN SYMBOL A 1.35 A1 0.1 A2 1.25 b 0. ø 0º ...

Page 21

D E INDEX AREA (D/2 X E1/2) e TOP VIEW 16 Pin SOIC JEDEC MS-013 (AA) Variation MIN NOM SYMBOL ...

Page 22

PIN PDIP JEDEC MS-001 (BB) Variation SYMBOL MIN NOM 0. 0.115 0.13 b 0.014 0.018 b2 0.045 0.06 b3 0.3 0.039 c 0.008 0.01 D 0.735 0.75 D1 0.005 ...

Page 23

... Part Number SP691ACP ............................................... 0 SP691ACN ............................................... 0 SP691ACN/TR ......................................... 0 SP691ACT ............................................... 0 SP691ACT/TR ......................................... 0 SP691AEP ............................................. -40 SP691AEN ............................................. -40 SP691AEN/TR ....................................... -40 SP691AET ............................................. -40 SP691AET/TR ........................................ -40 SP693ACP ............................................... 0 SP693ACN ............................................... 0 SP693ACN/TR ......................................... 0 SP693ACT ............................................... 0 SP693ACT/TR ......................................... 0 SP693AEP ............................................. -40 SP693AEN ............................................. -40 SP693AEN/TR ....................................... -40 SP693AET ............................................. -40 SP693AET/TR ........................................ -40 Available in lead free packaging. To order add “-L” suffix to part number. Example: SP691AEN/TR = standard; SP691AEN-L/TR = lead free /TR = Tape and Reel Pack quantity is 2500 for NSOIC and WSOIC ...

Page 24

Part Number SP800LCP ............................................... 0 SP800LCN ............................................... 0 SP800LCN/TR ......................................... 0 SP800LCT ................................................ 0 SP800LCT/TR .......................................... 0 SP800LEP ............................................. -40 SP800LEN ............................................. -40 SP800LEN/TR ....................................... -40 SP800LET .............................................. -40 SP800LET/TR ........................................ -40 SP800MCP .............................................. 0 SP800MCN .............................................. 0 SP800MCN/TR ........................................ ...

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