MAX709L Maxim Integrated Products, MAX709L Datasheet

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MAX709L

Manufacturer Part Number
MAX709L
Description
Manufacturer
Maxim Integrated Products
Datasheet

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19-0136; Rev. 1; 6/94
The MAX709 provides a system reset during power-up,
power-down, and brownout conditions. When V
below the reset threshold, RESET goes low and holds
the µP in reset for 140ms min after V
threshold.
The RESET output is guaranteed to be in the correct
state with V
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.
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
_______________General Description
_______________________Applications
Minimum Component Count,
Low-Cost Processor Systems
CC
MAX709
GND
V
down to 1V. The MAX709 provides
CC
________________________________________________________________ Maxim Integrated Products
RESET
RESET
Power-Supply Monitor with Reset
GND
V
CC
CC
P
rises above the
CC
falls
* Dice are specified at T
Note: This part offers a choice of five different reset threshold
__________________Pin Configuration
______________Ordering Information
MAX709_CPA
MAX709_CUA
MAX709_CSA
MAX709_C/D
MAX709_EPA
MAX709_EUA
MAX709_ESA
___________________________Features
+5V, +3.3V, and +3V Versions
No External Components
Low Cost
Precise Power-Down Reset Threshold
140ms Min Power-On Reset Delay
Immune to Short Negative V
8-Pin DIP, µMAX, and SO Packages
Low Supply Current: 35µA - MAX709R/S/T
TOP VIEW
PART
voltages. Select the letter corresponding to the desired
nominal reset threshold voltage, and insert it into the
blank to complete the part number.
SUFFIX
M
S
R
L
T
GND
N.C.
N.C.
V
CC
RESET THRESHOLD
1
2
3
4
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
A
TEMP. RANGE
= +25 °C , DC parameters only.
DIP/SO/ MAX
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX709
65µA - MAX709L/M
CC
Transients
VOLTAGE (V)
8
7
6
5
PIN-PACKAGE
8 Plastic DIP
8 µMAX
8 SO
Dice
8 Plastic DIP
8 µMAX
8 SO
4.65
4.40
3.08
2.93
2.63
N.C.
RESET
N.C.
N.C.
1

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MAX709L Summary of contents

Page 1

... SUFFIX __________________Pin Configuration TOP VIEW N. GND N.C. Transients CC 65µA - MAX709L/M TEMP. RANGE PIN-PACKAGE 0°C to +70°C 8 Plastic DIP 0°C to +70°C 8 µMAX 0°C to +70° 0°C to +70°C Dice -40°C to +85°C 8 Plastic DIP -40°C to +85°C 8 µMAX -40°C to +85° +25 ° ...

Page 2

... V SINK RESET Output Voltage I = 100µA, V SINK I SOURCE MAX709R/S/T only I SOURCE MAX709L/M only Note 1: Supply current is measured with _______________________________________________________________________________________ Operating Temperature Ranges MAX709_C___ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C + 0.3V) MAX709_E___ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C CC Storage Temperature Range . . . . . . . . . . . . . . . . . . - 65°C to +160°C Lead Temperature (soldering, 10sec +300°C ...

Page 3

Power-Supply Monitor with Reset __________________________________________Typical Operating Characteristics POWER-UP RESET DELAY vs. TEMPERATURE 300 V = RESET THRESHOLD MAX RISING CC 250 200 150 100 50 0 -60 -20 20 TEMPERATURE (°C) SUPPLY CURRENT vs. TEMPERATURE 100 NOTE: STEADY-STATE ...

Page 4

... As the magnitude of the transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. Typically, for the MAX709L/MAX709M transient that goes 100mV CC below the reset threshold and lasts 40µs or less will not cause a reset pulse to be issued. ...

Page 5

Power-Supply Monitor with Reset V CC MAX709 RESET R1 GND Figure 2. RESET Valid Ground Circuit CC Interfacing to µPs with Bidirectional Reset Pins Microprocessors with bidirectional reset pins (such as the Motorola 68HC11 series) can contend ...

Page 6

... MAX705/706 4.65/4.40 140 1.6 MAX706P 2.63 140 1.6 MAX706R/S/T 2.63/2.93/ 140 1.6 3.08 MAX707/708 4.65/4.40 140 - MAX708R/S/T 2.63/2.93/ 140 - 3.08 MAX709L/M/ 4.65/4.40/ 140 - R/S/T 2.63/2.93/3.08 MAX791 4.65 140 1 MAX792L/M/ 4.65/4.40/ 140 1 R/S/T 2.63/2.93/3.08 MAX800L/M 4.60/4.40 140 1.6/adj. MAX802L/M 4.60/4.40 140 1.6 MAX805L 4 ...

Page 7

Power-Supply Monitor with Reset ___________________Chip Topography V CC RESET GND 0.056" (1.422mm) TRANSISTOR COUNT: 380 SUBSTRATE CONNECTED ________________________________________________________Package Information A 0.101mm 0.004 _______________________________________________________________________________________ 0.045" (1.143mm 8-PIN MAX MICROMAX ...

Page 8

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1994 Maxim Integrated Products 0° ...

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