sp691a Exar Corporation, sp691a Datasheet - Page 7

• Manufacturer Part Number: sp691a
• Description: Low Power Microprocessor Supervisory With Battery Switch-over
• Manufacturer: Exar Corporation

Figure 11. Watchdog and Reset Timeout Period vs.
OSC
Figure 13. V
Operating Mode)
Figure 15. V
Date: 4/18/05
1000
1000
100
IN
100
0.1
10
10
1
Timing Capacitor (C
1
10
1
CC
CC
Long Watchdog Timeout Period
Reset Active Timeout Period
Short Watchdog Timeout Period
to V
to LOWLINE and CE
SP691A/693A/800L/800M Low Power Microprocessor Supervisor with Battery Switch-Over © Copyright 2005 Sipex Corporation
LOWLINE
V
Threshold
OUT
OSCIN Capacitor (pF)
100
10
CC
vs. Output Current (Normal
RESET
CE
Reset
I
OUT
OSC
)
(mA)
OUT
1000
100
OUT
Slope = 0.6Ω
LOW
LOW
LOW
V
V
V
+5V
BATT
CC
V
BATT
0V
HI
HI
HI
Delay
CC
= 4.5V
= 2.8V
= 5V
= 0V
10000
1000
TYPICAL PERFORMANCE CHARACTERISTICS
80µs
7
Figure 12. Chip-Enable Propagation Delay vs. CE
Load Capacitance
Figure 14. V
Backup Mode)
1000
100
10
30
25
20
15
10
1
5
0
16µs
1
0
1.1µs
BATT
V
50Ω driver
50
BATT
V
CC
to V
= 2.8V
= 5V
100
OUT
10
vs. Output Current (Battery-
150
Cload (pF)
I
OUT
(mA)
200
100
Slope = 5Ω
V
V
250
CC
BATT
= 4.5V
= 0V
300
OUT
1000
350