ADM809SAKSZ-REEL7 Analog Devices Inc, ADM809SAKSZ-REEL7 Datasheet - Page 8

• Manufacturer Part Number: ADM809SAKSZ-REEL7
• Description: IC SUPERVISOR MPU 2.93V SC-70-3
• Manufacturer: Analog Devices Inc
• Type: Simple Reset/Power-On Resetr

Specifications of ADM809SAKSZ-REEL7

• Package / Case: SC-70-3, SOT-323-3
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 125°C
• Output: Push-Pull, Totem Pole
• Reset: Active Low
• Number Of Voltages Monitored: 1
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 2.93V
• Number Of Elements: 1
• Monitored Voltage 1 (typ): 2.5/3/3.3/5V
• Threshold Voltage 1 (max): 2.96V
• Battery Backup Switching: No
• Watchdog Timer: No
• Chip Enable Signals: No
• Reset Active Time: 840ms
• Manual Reset: No
• Package Type: SC-70
• Operating Supply Voltage (min): 1V
• Operating Supply Voltage (max): 5.5V
• Reset Threshold Voltage (max): 2.96V
• Reset Threshold Voltage (min): 2.89V
• Family Name: ADM809
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Power Fail Detection: No
• Mounting: Surface Mount
• Pin Count: 3
• Supply Current: 0.06mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADM803/ADM809/ADM810
INTERFACING TO OTHER DEVICES’ OUTPUT
The ADM803/ADM809/ADM810 series is designed to integrate
with as many devices as possible and, therefore, has a standard
output dependent on V
both 3 V and 5 V, or any nominal voltage within the minimum
and maximum specifications for V
interfacing the ADM803/ADM809/ADM810 to other devices.
ENSURING A VALID RESET OUTPUT DOWN TO
V
When V
longer sinks current. A high impedance CMOS logic input
connected to RESET may, therefore, drift to undetermined logic
levels. To eliminate this problem, a 100 kΩ resistor should be
connected from RESET to ground.
BENEFITS OF AN ACCURATE RESET THRESHOLD
In other microprocessors, tolerances in supply voltages lead
to an overall increase in reset tolerance levels due to the
deterioration of the reset circuit’s power supply. In the
ADM803/ADM809/ADM810, the possibility of a malfunction
during a power failure is greatly reduced because the devices
can operate effectively even when there are large degradations
of the supply voltages. Another advantage is the very accurate
internal voltage reference circuit of the ADM803/ADM809/
ADM810. These benefits combine to produce an exceptionally
reliable voltage monitor circuit.
CC
= 0 V
Figure 11. Ensuring a Valid Reset Output Down to V
CC
falls below 0.8 V, the ADM803/ADM809 RESET no
ADM809
CC
GND
V
V
CC
CC
. This enables the parts to be used in
RESET
CC
. This design simplifies
CC
= 0 V
Rev. G | Page 8 of 12
INTERFACING TO MICROPROCESSORS WITH
MULTIPLE INTERRUPTS
In a number of cases, it is necessary to interface many interrupts
from different devices (for example, thermal, altitude, and
velocity sensors). The ADM803/ADM809/ADM810 can easily
be integrated into existing interrupt-handling circuits, as shown
in Figure 12, or can be used as standalone devices.
Figure 12. Interfacing to Microprocessors with Multiple Interrupts
ADM809
GND
V
V
CC
CC
RESET
PRIORITY ENCODER
74LS147
OTHER SENSING
DEVICES
4-LINE BCD TO
MICROPROCESSOR