MAX809 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
MAX809 Datasheet PDF : 12 Pages
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Philips Semiconductors
3-pin microprocessor resets
Product data
MAX809/MAX810
DESCRIPTION
The MAX809/MAX810 are single function microprocessor resets
used to monitor supply voltages in microprocessor and other logic
systems. They provide a reset signal to the microprocessor during
power-up, power-down, and brownout conditions. The reset signal is
asserted when the supply voltage drops below the preset threshold,
and the signal is released a set time after the supply voltage has
risen above the preset threshold.
The MAX809 has an active-LOW reset output while the MAX810
has an active-HIGH reset output.
The low supply current of typically 17 µA makes the
MAX809/MAX810 ideal for use in portable, battery operated
equipment. They are available in the 3-pin SOT23 and SC70
packages.
FEATURES
• Monitors 5.0 V, 3.3 V and 3 V supplies
• 140 ms min. reset delay time:
– Active-LOW RESET output (MAX809)
– Active-HIGH RESET output (MAX810)
• Power supply transient immunity
• Guaranteed reset valid for 1.1 V
• Available in small SOT23 and SC70 3-pin packages
• No external components needed
• Specified over full temperature range –40 °C to +105 °C
APPLICATIONS
• Embedded controllers
• Battery operated systems
• Wireless communication systems
• PDAs and handheld equipment
SIMPLIFIED SYSTEM DIAGRAMS
VCC
VCC
VCC
VCC
VCC
VCC
MAX809
RESET
GND
MICROPROCESSOR
RESET INPUT
GND
SL01642
Figure 1. MAX809 simplified system diagram.
MAX810
RESET
GND
MICROPROCESSOR
RESET INPUT
GND
SL01643
Figure 2. MAX810 simplified system diagram.
2003 Aug 08
2
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