Datasheet > IMP183834

IMP183834

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
IMP		监控
页数	文件大小	规格书
8页	246K
描述
Dual 5V and 3.3V uP Power Supply Supervisors w/Manual Reset

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IMP183834 数据手册

IMP1834/A/D

OWER

ANAGEMENT

Key Features

Dual 5V and 3.3V µP Power

Supply Supervisors w/Manual Reset

◆

Lower power, pin-compatible replacements for

the Dallas DS1834

— 40% lower maximum supply current:

30µA vs 50µA

– Push-Pull and Open-Drain Outputs

– Selectable Trip Point Tolerance

◆

Monitor 5V and 3.3V supplies simultaneously

5V and 3.3V power-on reset

350ms reset time

Debounced pushbutton reset input

Push-Pull CMOS output

— IMP1834, IMP1834D

— Eliminates external pull-up resistors

— Active LOW (IMP1834), HIGH (IMP1834D)

Open drain output

— IMP1834A

— Active LOW

Selectable 5V and 3.3V trip point tolerance

Internal power drawn from highest input

voltage, 5V or 3.3V

Precision temperature-compensated voltage

reference and comparator

Low-cost surface mount SO, compact

MicroSO and DIP packages

The IMP1834 supervisors simultaneously monitor both 3.3V and 5V

power sources and issue reset signals when either supply is out of toler-

ance. When an out-of-tolerance condition is detected, the output-reset

signal of the affected supply becomes active and resets the system micro-

processor/microcontroller. On power-up and after the supply voltage

returns to an in-tolerance condition, the reset signal remains active for

approximately 350ms. This allows the power supply and system micro-

processor to stabilize.

The IMP1834 supervisors are pin-compatible with devices from Dallas

Semiconductor and require up to 40% less current.

◆

Tolerance levels are independently selectable for both supplies.

Tolerance options are 5- and 10-percent for the 5V supply and for the

3.3V supply, 10- and 20-percent.

◆

The IMP1834 and IMP1834D have push-pull reset output stages. The

IMP1834A active LOW reset outputs are open drain devices that can

both be connected to either 5 volt or 3.3 volt supply. The IMP1834 and

IMP1834A have active LOW reset outputs. The IMP1834D has active

HIGH reset outputs.

◆

All devices can issue reset signals through an internally debounced

pushbutton reset input that affects both reset outputs.

Wide operating temperature, –40°C to +85°C

All devices operate over the extended industrial temperature range.

Devices are available in 8-pin DIP, surface mount 8-pin SO and 8-pin

MicroSO packages. Die are also available.

IMP1834A

5VRESET

Block Diagram

IMP1834

3.3VRESET

5V_IN

1834_02.eps

5V Tolerance

Bias

For IMP1834D

5VTOL

–

5VRESET

350 ms

Delay

5VRESET (IMP1834D)

Low TC

Reference

40kΩ

Pushbutton Level

Sense and Debounce

PBRST

3.3V_IN

For IMP1834D

3.3V Tolerance

Bias

3.3VTOL

GND

–

3.3VRESET

350 ms

Delay

3.3VRESET (IMP1834D)

1834_01.eps

1999 IMP, Inc.

408-432-9100/www.impweb.com

12 3 4 5 6 7 8

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