ADM8693ANZ データシートの表示（PDF） - Analog Devices

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ADM8693ANZ

Microprocessor Supervisory Circuits

Analog Devices 

ADM8690/ADM8691/ADM8692/ADM8693/ADM8695

GENERAL DESCRIPTION

The ADM869x family of supervisory circuits offers complete

single- chip solutions for power supply monitoring and battery

control functions in microprocessor systems. These functions

include microprocessor reset, backup battery switchover,

watchdog timer, CMOS RAM write protection, and power

failure warning. The complete family provides a variety of

configurations to satisfy most microprocessor system

requirements.

The ADM869x family is fabricated using an advanced epitaxial

CMOS process combining low power consumption (0.7 mW),

extremely fast chip enable gating (3 ns), and high reliability.

RESET assertion is guaranteed with VCC as low as 1 V. In

addition, the power switching circuitry is designed for minimal

voltage drop thereby permitting increased output current drive

of up to 100 mA without the need of an external pass transistor.

See Table 1 for a product selection guide listing the characteristics

of each device in the ADM869x family. To place an order, use

the Ordering Guide provided as the last section of this data sheet.

Table 1. Product Selection Guide

Part

Number

Nominal

Reset Time

Nominal VCC Reset

Threshold

ADM8690 50 ms

4.65 V

ADM8691 50 ms or ADJ 4.65 V

ADM8692 50 ms

4.4 V

ADM8693 50 ms or ADJ 4.4 V

ADM8695 200 ms or ADJ 4.65 V

Nominal Watchdog

Timeout Period

1.6 s

100 ms, 1.6 s, ADJ

1.6 s

100 ms, 1.6 s, ADJ

100 ms, 1.6 s, ADJ

Battery Backup

Switching

Yes

Yes

Yes

Yes

Yes

Base Drive

Ext PNP

No

Yes

No

Yes

Yes

Chip Enable

Signals

No

Yes

No

Yes

Yes

Rev. B | Page 3 of 20

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