MAX809L PHILIPS [NXP Semiconductors], MAX809L Datasheet - Page 2

• Manufacturer Part Number: MAX809L
• Description: 3-pin microprocessor resets
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
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 A makes the
MAX809/MAX810 ideal for use in portable, battery operated
equipment. They are available in the 3-pin SOT23 and SC70
packages.
SIMPLIFIED SYSTEM DIAGRAMS
2003 Aug 08
3-pin microprocessor resets
V
CC
Figure 1. MAX809 simplified system diagram.
MAX809
GND
V
CC
RESET
RESET INPUT
MICROPROCESSOR
GND
V
CC
SL01642
2
FEATURES
APPLICATIONS
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
Embedded controllers
Battery operated systems
Wireless communication systems
PDAs and handheld equipment
V
CC
Figure 2. MAX810 simplified system diagram.
MAX810
GND
V
CC
RESET
MAX809/MAX810
RESET INPUT
MICROPROCESSOR
GND
V
CC
Product data
SL01643