Multiple Input Programmable
Supervisory ICs
ADM6305/ADM6306
FUNCTIONAL BLOCK DIAGRAMS
FEATURES
V
CC
Adjustable input threshold voltage options: 0.4 V and 1.23 V
Pre-trimmed VCC threshold options (ADM6306)
Increments between 2.5 V and 5 V
RST IN1
RST IN2
RESET
GENERATOR
RESET
Manual reset input (ADM6306)
0.4V/1.23V
0.4V/1.23V
4 factory programmed reset timeout delays
1 ms, 20 ms, 140 ms, and 1.12 sec (minimum)
Reset output stage: active low, open drain
Low power consumption: 5 µA typical
Power supply glitch immunity
ADM6305
GND
5-lead SOT-23 package
Temperature range: −40°C to +125°C
Figure 1.
V
CC
APPLICATIONS
Portable/battery-operated equipment
Microprocessor systems
Multivoltage applications
1.23V
RST IN
RESET
GENERATOR
RESET
0.4V/1.23V
V
CC
ADM6306
GLITCH
REJECTION
MR
GND
Figure 2.
GENERAL DESCRIPTION
1.23 V, while in the case of ADM6305DxARJZ1 model, it is
0.4 V. The VCC input of the ADM6305 is not a monitored input.
The ADM6305/ADM6306 are dual voltage supervisors
designed to monitor two supplies and provide a reset signal to
DSP- and microprocessor-based systems. Low supply current
and a small form factor make these devices suitable for portable
and battery-operated applications.
The ADM6306 has one adjustable undervoltage reset input,
RST IN, which features a choice of reset threshold, 0.4 V or
1.23 V (see the Ordering Guide for more information). The
ADM6306 incorporates a variety of internally pretrimmed VCC
undervoltage threshold options for monitoring supply voltages
in increments between 2.5 V and 5 V. The ADM6306 also
includes a manual reset input.
If a monitored power supply voltage falls below the minimum
voltage threshold, a single active low output asserts triggering a
system reset. Once all voltages rise above the selected threshold
level, the reset signal remains low for the reset timeout period.
Four reset timeout options are available.
RESET
The ADM6305/ADM6306
as VCC exceeds 0.9 V.
output remains valid as long
The ADM6305 monitors two supplies via two adjustable
resistor-programmable undervoltage reset inputs. Both RST
IN1 and RST IN2 have a reset threshold of either 0.4 V or
1.23 V depending on the particular model; that is, the RST IN1
and RST IN2 threshold of the ADM6305DxARJZ model is
The ADM6305/ADM6306 are available in a 5-lead SOT-23
package. These devices are specified over the temperature range
of −40°C to +125°C.
Rev. 0
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