Diodes AZ809/AZ810 - Manual

Data Sheet
3-PIN MICROPROCESSOR RESET CIRCUITS AZ809/AZ810
1
Dec. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
General Description
The AZ809/810 microprocessor supervisory circuits
can be used to monitor the power supplies in micropro-
cessor and digital systems. They provide a reset to the
microprocessor in power-up, power-down and brown-
out conditions. The function of the AZ809/810 is to
monitor the V
CC
supply voltage, and assert a reset sig-
nal whenever this voltage declines below the factory-
programmed reset threshold. The reset signal remains
asserted for 240ms after V
CC
rises above the threshold.
The AZ809 has an active-low RESET output, while
the AZ810 has an active-high RESET output. Seven
standard reset voltage options are available, suitable
for monitoring 3.0V, 3.3V and 5.0V supply voltages.
With a typical supply current of only 8
μ A when V
CC
is
3.3V, the AZ809/810 are ideal for use in portable
equipment.
These ICs are available in SOT-23 package.
Features
· Precise Monitoring of 3.0V, 3.3V and 5.0V Sup-
ply Voltages
· Improved Maxim MAX809/MAX810 Replace-
ment
· 140ms Min. Reset Pulse Width
Active-low Reset Output (AZ809)
Active-high Reset Output (AZ810)
· No External Components
· Specified Over Full Temperature Range: -40 to
105
o C
Applications
· Embedded Controllers
· Battery Operated Systems
· Intelligent Instruments
· Wireless Communication Systems
· PDAs and Handheld Equipment
SOT-23
Figure 1. Package Type of AZ809/810