Datasheet > MIC842

MIC842

更新时间： 2024-11-22 22:51:19

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
8页	65K
描述
Comparator with Reference

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MIC842 数据手册

MIC841/2

Micrel

MIC841/842

Comparator with Reference

General Description

The MIC841 and MIC842 are micropower, precision voltage

comparators with an on-chip voltage reference.

Teeny™

Both devices are intended for voltage monitoring applications.

Externalresistorsareusedtosetthevoltagemonitorthreshold.

When the threshold is crossed, the outputs switch polarity.

Features

• Optimized for PDAs, cellular telephones, pagers,

and other battery-powered devices

• Output can be pulled up to 6V regardless of supply

voltage (841NBC5 only)

• High ±1.25% voltage threshold accuracy

• Built in hysteresis for noise suppression

(MIC842)

• Extremely low 1.5µA typical supply current

• Immune to brief input transients

• Teeny™ 5-lead SC-70 package

The MIC842 incorporates a voltage reference and comparator

with fixed internal hysteresis; two external resistors are used to

set the switching threshold voltage. The MIC841 provides a

similar function with user adjustable hysteresis; this part re-

quires three external resistors to set the upper and lower

thresholds (the difference between the threshold voltages

being the hysteresis voltage).

Both the MIC841 and MIC842 are available with push-pull or

open-drain output stage. The push-pull output stage is config-

uredeitheractivehighoractivelow;theopen-drainoutputstage

is only configured active high.

Applications

• PDAs

• Pagers

• Cordless phones

• Consumer electronics

• Embedded controllers

• Personal electronics

Supply current is extremely low (1.5µA, typical), making it ideal

for portable applications.

The MIC841/2 is supplied in Micrel’s Teeny™ 5-lead SC-70

package.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Typical Application

V_IN

V_DD

MIC841

V_IN

V_DD

V_OUT

VDD OUT

LTH

MIC842

V_LTH> V_HTH

V_REF= 1.24V

1.5V ≤ V_DD≤ 5.5V

V_OUT

VDD

OUT

HTH GND

V_REF= 1.24V

1.5V ≤ V_DD≤ 5.5V

INP

GND

Threshold Detection with Hysteresis Set by a Third

External Resistor

Threshold Detector with Internal Fixed Hysteresis

Teeny™ is a trademark of Micrel, Inc.

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

September 2004

MIC841/2

12 3 4 5 6 7 8

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