Multiple Input Programmable

Supervisory ICs

Data Sheet

ADM6305/ADM6306

Rev. A

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FEATURES

Adjustable input threshold voltage options: 0.4 V and 1.23 V

Pre-trimmed V

Increments between 2.5 V and 5 V

Manual reset input (ADM6306)

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

5-lead SOT-23 package

Temperature range: −40°C to +125°C

APPLICATIONS

Portable/battery-operated equipment

Microprocessor systems

Multivoltage applications

FUNCTIONAL BLOCK DIAGRAMS

Figure 1.

Figure 2.

GENERAL DESCRIPTION

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.

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.

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

1.23 V, while in the case of ADM6305DxARJZ1 model, it is

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

undervoltage threshold options for monitoring supply voltages

in increments between 2.5 V and 5 V. The ADM6306 also

includes a manual reset input.

The ADM6305/ADM6306 RESET output remains valid as long

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.

RESET

GENERATOR

RESET

0.4V/1.23V

RST IN1

GND

0.4V/1.23V

RST IN2

ADM6305

RESET

GENERATOR

GLITCH

REJECTION

RESET

1.23V

GND

0.4V/1.23V

RST IN

MR

ADM6306