MAX7705 Datasheet PDF


Part Number

MAX7705

Description

P Power-Supply Monitor with Reset

Manufacture

Maxim

Total Page 8 Pages
PDF Download
Download MAX7705 Datasheet PDF


Features Datasheet pdf 19-0151; Rev 0; 6/93 µP Power-Supply M onitor with Reset _______________Genera l Description In applications with micr oprocessors (µPs) that have a RESET in put, the MAX7705 is functionally and so cket compatible with the TL7705, but re quires no external components. It provi des power-supply glitch immunity and a guaranteed power-up reset delay, while typically consuming 1/27th the power fr om a +5V supply. The MAX7705 monitors t he power supply in µP and digital syst ems. The RESET output is valid for VCC down to 1V. The device offers excellent circuit reliability and low cost by el iminating external components and adjus tments. A system reset is provided duri ng power-up, powerdown, and brownout co.
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MAX7705 Datasheet
19-0151; Rev 0; 6/93
µP Power-Supply Monitor
with Reset
_______________General Description
In applications with microprocessors (µPs) that have a
RESET input, the MAX7705 is functionally and socket
compatible with the TL7705, but requires no external
components. It provides power-supply glitch immunity
and a guaranteed power-up reset delay, while typically
consuming 1/27th the power from a +5V supply.
The MAX7705 monitors the power supply in µP and digital
systems. The RESET output is valid for VCC down to 1V.
The device offers excellent circuit reliability and low cost
by eliminating external components and adjustments.
A system reset is provided during power-up, power-
down, and brownout conditions. When VCC is below the
reset threshold, RESET is low and holds the µP in reset.
RESET will go high 280ms after VCC rises above the
reset threshold. The MAX7705 is available in 8-pin DIP
and SO packages.
FEATURE
No. of External
Components Required
Operating Supply +5V
Current
+3V
Power-Supply Glitch
Immunity
Guaranteed Minimum
Reset Delay
MAX7705
0
65µA
35µA
Yes
Yes
TL7705
3
1.8mA
1.8mA
No
No
________________________Applications
Minimum Component Count, Low-Cost
Processor Systems
____________________________Features
o No External Components
o Low Cost
o Precise Reset Threshold
o 280ms Power-On Reset Delay
o 8-Pin DIP and SO Packages
______________Ordering Information
PART
TEMP. RANGE
MAX7705CPA
0°C to +70°C
MAX7705CSA
0°C to +70°C
MAX7705C/D
0°C to +70°C
MAX7705EPA
-40°C to +85°C
MAX7705ESA
-40°C to +85°C
* Contact factory for dice specifications.
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
__________Typical Operating Circuit
__________________Pin Configuration
TOP VIEW
N.C. 1
N.C. 2
N.C. 3
GND 4
MAX7705
DIP/SO
8 VCC
7 N.C.
6 N.C.
5 RESET
*
*
MAX7705
1 N.C.
VCC 8
2 N.C.
N.C. 7
3 N.C.
N.C. 6
4 GND
RESET 5
VCC
µP
*
RESET
GND
* THE MAX7705 ELIMINATES THREE EXTERNAL
COMPONENTS REQUIRED BY THE TL7705.
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.




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