MAX708CSA+T Maxim Integrated Products, MAX708CSA+T Datasheet - Page 8
![IC SUPERVISOR MPU 8-SOIC](/photos/1/39/13902/8-soic_21-0042b_sml.jpg)
MAX708CSA+T
Manufacturer Part Number
MAX708CSA+T
Description
IC SUPERVISOR MPU 8-SOIC
Manufacturer
Maxim Integrated Products
Type
Simple Reset/Power-On Resetr
Datasheet
1.MAX544BCSA.pdf
(12 pages)
Specifications of MAX708CSA+T
Number Of Voltages Monitored
1
Output
Push-Pull, Push-Pull
Reset
Active High/Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
4.4V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Low-Cost, µP Supervisory Circuits
Figure 5. RESET Valid to Ground Circuit
Figure 7. Monitoring a Negative Voltage
8
_______________________________________________________________________________________
+5V
V-
PFO
MR
+5V
+5V
R1
R2
0V
0V
5 1.25
−
R1
MAX70_
=
1.25
RESET
V-
PFI
−
R2
V TRIP
MAX70_
GND
V
CC
V
RESET
TRIP
, V TRIP
PFO
MR
R1
<
100kΩ
0
0V
2N3904
TO µP
100kΩ
µPs with bidirectional reset pins, such as the Motorola
68HC11 series, can contend with the MAX705-MAX708
RESET output. If, for example, the RESET output is driven
high and the µP wants to pull it low, indeterminate logic
levels may result. To correct this, connect a 4.7kΩ
resistor between the RESET output and the µP reset I/O,
as in Figure 8. Buffer the RESET output to other system
components.
Figure 6. Monitoring Both +5V and +12V
Figure 8. Interfacing to µPs with Bidirectional Reset I/O
130kΩ
1MΩ
1%
1%
MAX70_
GND
V
+12V
+12V Reset
Threshold at +25°C
CC
PARAMETER
RESET
+5V
BUFFERED RESET TO OTHER SYSTEM COMPONENTS
4.7kΩ
PFI
V
Bidirectional Reset Pins
CC
MIN
10.67
Interfacing to µPs with
MAX70_
GND
TYP
10.87
RESET
PFO
MR
RESET
MAX
11.50
GND
V
µP
CC
UNIT
V
TO µP