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ADM6305

Multiple Input Programmable Supervisory ICs

Analog Devices 

Data Sheet

FEATURES

Adjustable input threshold voltage options: 0.4 V and 1.23 V

Pretrimmed VCC threshold options (ADM6306)

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

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. After 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 ADM6305D3ARJZ-RL7 model is

Rev. C

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license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

Multiple Input Programmable

Supervisory ICs

ADM6305/ADM6306

FUNCTIONAL BLOCK DIAGRAMS

VCC

RST IN1

RST IN2

0.4V/1.23V

RESET

GENERATOR

RESET

0.4V/1.23V

ADM6305

GND

Figure 1.

VCC

RST IN

1.23V

0.4V/1.23V

VCC

MR

GLITCH

REJECTION

RESET

GENERATOR

RESET

ADM6306

GND

Figure 2.

1.23 V, while in the case of ADM6305D3ARJZ1-RL7 model, it is

0.4 V. The VCC input of the ADM6305 is not a monitored input.

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. Not all options are released for

sale as standard models. See the Ordering Guide for details.

The ADM6305/ADM6306 RESET output remains valid as long

as VCC exceeds 0.9 V.

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700 ©2010–2018 Analog Devices, Inc. All rights reserved.

Technical Support

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