ADM6316 View Datasheet(PDF) - Analog Devices

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Description

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ADM6316

Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23

Analog Devices 

Data Sheet

Supervisory Circuits with Watchdog

and Manual Reset in 5-Lead SOT-23

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

FEATURES

26 reset threshold options

2.5 V to 5 V in 100 mV increments

4 reset timeout options

1 ms, 20 ms, 140 ms, and 1120 ms (minimum)

4 watchdog timeout options

6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)

Manual reset input

Reset output stages

Push-pull active low

Open-drain active low

Push-pull active high

Low power consumption: 5 μA

Guaranteed reset output valid to VCC = 1 V

Power supply glitch immunity

Specified over industrial temperature range

5-lead SOT-23 package

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Portable equipment

GENERAL DESCRIPTION

The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/

ADM6321/ADM6322 are supervisory circuits that monitor

power supply voltage levels and code execution integrity in

microprocessor-based systems. As well as providing power-on

reset signals, an on-chip watchdog timer can reset the micro-

processor if it fails to strobe within a preset timeout period. A

reset signal can also be asserted by an external push button

through a manual reset input. The seven devices feature different

combinations of watchdog input, manual reset input, and output

stage configuration, as shown in Table 1.

Table 1. Selection Table

Part No.

ADM6316

ADM6317

ADM6318

ADM6319

ADM6320

ADM6321

ADM6322

Watchdog

Yes

Yes

Yes

No

Yes

Yes

No

Manual Reset

Yes

Yes

No

Yes

Yes

No

Yes

Rev. H

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FUNCTIONAL BLOCK DIAGRAMS

ADM6316

VCC

VREF

RESET

GENERATOR

VCC

RESET

MR

DEBOUNCE

WATCHDOG

DETECTOR

GND

ADM6320

WDI

Figure 1.

VCC

VREF

MR

DEBOUNCE

RESET

GENERATOR

WATCHDOG

DETECTOR

RESET

GND

WDI

Figure 2.

Each device is available in a choice of 26 reset threshold options

ranging from 2.5 V to 5 V in 100 mV increments. There are also

four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms

(minimum) and four watchdog timeout options of 6.3 ms, 102 ms,

1600 ms, and 25.6 sec (typical).

The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/

ADM6321/ADM6322 are available in 5-lead SOT-23 packages

and typically consume only 3 μA, making them suitable for use

in low power portable applications.

RESET

Push-pull

No

Push-pull

Push-pull

Open-drain

Open-drain

Open-drain

Output Stage

RESET

No

Push-pull

Push-pull

Push-pull

No

Push-pull

Push-pull

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Technical Support

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