19-0136; Rev. 1; 6/94
P o w e r-S u p p ly Mo n it o r w it h Re s e t
MAX709
_______________Ge n e ra l De s c rip t io n
___________________________Fe a t u re s
♦ +5V, +3.3V, and +3V Versions
The MAX709 provides a system reset during power-up,
power-down, and brownout conditions. When VCC falls
below the reset threshold, RESET goes low and holds
the µP in reset for 140ms min after VCC rises above the
threshold.
♦ No External Components
♦ Low Cost
♦ Precise Power-Down Reset Threshold
♦ 140ms Min Power-On Reset Delay
♦ Immune to Short Negative VCC Transients
♦ 8-Pin DIP, µMAX, and SO Packages
The RESET output is guaranteed to be in the correct
state with VCC down to 1V. The MAX709 provides
excellent circuit reliability and low cost by eliminating
external components and adjustments when used with
+5V, +3.3V, or +3V powered systems. The MAX709 is
available 8-pin DIP, µMAX, and SO packages.
♦ Low Supply Current: 35µA - MAX709R/S/T
65µA - MAX709L/M
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 µMAX
8 SO
MAX709_CPA
MAX709_CUA
MAX709_CSA
MAX709_C/D
MAX709_EPA
MAX709_EUA
MAX709_ESA
Dice
_______________________Ap p lic a t io n s
8 Plastic DIP
8 µMAX
8 SO
Minimum Component Count,
Low-Cost Processor Systems
* Dice are specified at TA = +25°C, DC parameters only.
Note: This part offers a choice of five different reset threshold
voltages. Select the letter corresponding to the desired
nominal reset threshold voltage, and insert it into the
blank to complete the part number.
RESET THRESHOLD
SUFFIX
VOLTAGE (V)
4.65
L
M
T
4.40
__________Typ ic a l Op e ra t in g Circ u it
3.08
S
2.93
R
2.63
__________________P in Co n fig u ra t io n
V
CC
V
CC
TOP VIEW
µP
MAX709
N.C.
N.C.
1
2
3
4
8
7
6
5
RESET
RESET
V
CC
RESET
N.C.
MAX709
GND
N.C.
GND
GND
N.C.
DIP/SO/µMAX
________________________________________________________________ Maxim Integrated Products
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
