SP707 EXAR [Exar Corporation], SP707 Datasheet - Page 13

• Manufacturer Part Number: SP707
• Description: Low Power Microprocessor Supervisory Circuits
• Manufacturer: EXAR [Exar Corporation]

Applications
The SP705-708/813L series offers
unmatched performance and the lowest power
consumption for these industry standard devices.
Refer to Figures 20 and 21 for supply current
performance characteristics rated against
temperature and supply voltages.
Table 2 shows how the SP705-708/813L
series can be used instead of the Dallas
Semiconductor DS1232LP/LPS.
illustrates to a designer the advantages and trade-
offs of the SP705-708/813L series
compared to the Dallas Semiconductor device.
While the names of the pin descriptions may
differ, the functions are the same or very similar.
June 2008 Rev C
Figure 20. Supply Current vs. Temperature
45
44
43
42
41
40
39
38
37
36
35
-40C
Centigrade Temperature
25C
SP705 Low Power Microprocessor Supervisory Circuits
+85C
Table 2
4.75V
5.0V
5.5V
13
Unlike the DS1232, the SP705-708/813L
series has a separate watchdog output pin WDO
which can be simply connected to the MR input
to generate a Reset signal. The DS1232 has pin
selectable features, while the SP705-708/813L
series has more fixed functions of reset
threshold and watchdog time-out delay. For
most applications, the fixed functions will be
preferred, with the benefit of reduced cost due to
a less complex part. In addition, the SP705-708/
813L series has a power fail input and
output function not available with the DS1232
that is useful for monitoring systems with
unregulated supply voltages. The SP705-708/
813L series is available in one of the
industry's smallest space-saving package sizes,
the SOIC.
Figure 21. Supply Current vs. Supply Voltage
45
44
43
42
41
40
39
38
37
36
35
4.75V
5.0V
V
CC
© 2008 Exar Corporation
5.5V
-40C
25C
+85C