Datasheet

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General Description

The MAX6375–MAX6380 are ultra-low-power circuits

used for monitoring battery, power-supply, and regulat-

ed system voltages. Each detector contains a precision

bandgap reference, comparator, and internally trimmed

resistors that set specified trip threshold voltages.

These devices provide excellent circuit reliability and

low cost by eliminating external components and

adjustments when monitoring nominal system voltages

from 2.5V to 5V.

These circuits perform a single function: they assert an

output signal whenever the V

supply voltage falls

below a preset threshold. The devices are differentiated

by their output logic configurations and preset thresh-

old voltages. The MAX6375/MAX6378 (push-pull) and

MAX6377/MAX6380 (open-drain) have an active-low

output (OUT is logic low when V

is below V

). The

MAX6376/MAX6379 have an active-high push-pull out-

put (OUT is logic high when V

is below V

). All

parts are guaranteed to be in the correct output logic

state for V

down to 1V. The detector is designed to

ignore fast transients on V

. The MAX6375/MAX6376/

MAX6377 have voltage thresholds between 2.20V and

3.08V in approximately 100mV increments. The

MAX6378/MAX6379/MAX6380 have voltage thresholds

between 3.30V and 4.63V in approximately 100mV

increments.

Ultra-low supply current of 500nA (MAX6375/MAX6376/

MAX6377) makes these parts ideal for use in portable

equipment. All six devices are available in a space-sav-

ing SC70 package or in a tiny SOT23 package.

Applications

Precision Battery Monitoring

Load Switching/Power Sequencing

Power-Supply Monitoring in Digital/Analog Systems

Portable/Battery-Powered Equipment

Features

♦ Ultra-Low 500nA Supply Current

(MAX6375/MAX6376/MAX6377)

♦ Thresholds Available from 2.20V to 4.63V in

Approximately 100mV Increments

♦ ±2.5% Threshold Accuracy Over Temperature

♦ Low Cost

♦ Available in Three Versions: Push-Pull OUT,

Push-Pull OUT, and Open-Drain OUT

♦ Power-Supply Transient Immunity

♦ No External Components

♦ Available in Either a 3-Pin SC70

or 3-Pin SOT23 Package

MAX6375–MAX6380

3-Pin, Ultra-Low-Power SC70/SOT23

Voltage Detectors

________________________________________________________________ Maxim Integrated Products 1

( ) ARE FOR MAX6376/MAX6379 ONLY.

TOP VIEW

OUT(OUT)

GND

SC70-3

GND

SOT23-3

MAX6375XR–

MAX6380XR

MAX6375UR–

MAX6380UR

OUT(OUT)

Pin Configuration

19-1721; Rev 3; 12/05

The MAX6375/MAX6376/MAX6377 are available in factory-preset

thresholds from 2.20V to 3.08V, in approximately 0.1V increments.

The MAX6378/MAX6379/MAX6380 are available in factory-preset

thresholds from 3.30V to 4.63V, in approximately 0.1V increments.

Choose the desired threshold suffix from Table 1 and insert it in

the blank spaces following R. There are 21 standard versions,

with a required order increment of 2500 pieces. Sample stock is

generally held on the standard versions only (see the Selector

Guide). The required order increment is 10,000 pieces for non-

standard versions (Table 2). Contact factory for availability. All

devices available in tape-and-reel only.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

Ordering Information

Selector Guide appears at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART* TEMP RANGE PIN-PACKAGE

MAX6375UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6375XR _ _ -T -40°C to +85°C 3 SC70-3

MAX6376UR _ _ -T -40°C to +85°C 3 SOT23-3

MAX6376XR _ _ -T -40°C to +85°C 3 SC70-3

Ordering information continued at end of data sheet

Summary of content (7 pages)

PAGE 1
9-1721; Rev 3; 12/05 3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors The MAX6375–MAX6380 are ultra-low-power circuits used for monitoring battery, power-supply, and regulated system voltages. Each detector contains a precision bandgap reference, comparator, and internally trimmed resistors that set specified trip threshold voltages. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from 2.
PAGE 2
MAX6375–MAX6380 3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) VCC ...........................................................................-0.3V to +6V OUT, OUT (push-pull) ................................-0.3V to (VCC + 0.3V) OUT (open-drain) .....................................................-0.3V to +6V Input Current (VCC) .............................................................20mA Output Current (OUT, OUT) .................
PAGE 3
-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors PROPAGATION DELAY (FALLING) vs. TEMPERATURE MAX6375-01 1.0 0.9 200 PROPAGATION DELAY (µs) VCC = 5V 0.6 VCC = 3.3V 0.5 0.4 0.3 0.2 0.1 100 VOD = 20mV VOD = 10mV 50 VOD = 100mV VCC = 1.2V VOD = 200mV 0 0 -20 0 20 40 60 -40 80 -20 0 20 40 60 80 TEMPERATURE (°C) TEMPERATURE (°C) PROPAGATION DELAY (RISING) vs. TEMPERATURE MAXIMUM TRANSIENT DURATION vs.
PAGE 4
MAX6375–MAX6380 3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors Negative-Going VCC Transients ____________ Applications Information These devices are relatively immune to short-duration, negative-going VCC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Threshold Overdrive graph, for which output pulses are not generated.
PAGE 5
3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors MAX6375–MAX6380 Table 1. Factory-Trimmed Reset Thresholds‡ (continued) RESET THRESHOLD VOLTAGE, VTH (V) PART SUFFIX MAX6378_R MAX6379_R MAX6380_R TA = +25°C TA = -40°C TO +85°C MIN TYP MAX MIN MAX 33 3.250 3.300 3.350 3.217 3.383 34 3.349 3.400 3.451 3.315 3.485 35 3.447 3.500 3.552 3.412 3.587 36 3.546 3.600 3.654 3.510 3.690 37 3.644 3.700 3.755 3.607 3.792 38 3.743 3.800 3.857 3.705 3.895 39 3.841 3.
PAGE 6
MAX6375–MAX6380 3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors Table 2. Device Marking Codes and Minimum Order Increments (continued) TOP MARK TOP MARK ORDER (SC70) (SOT23) INCREMENT (k) PART PART TOP MARK TOP MARK ORDER (SC70) (SOT23) INCREMENT (k) MAX6378_R39-T — — 10 MAX6379_R43-T — — 10 MAX6378_R40-T — — 10 MAX6379_R44-T ADE FZHW 2.5 MAX6378_R41-T — — 10 MAX6379_R45-T — — 10 MAX6378_R42-T — — 10 MAX6379_R46-T ADT FZHX 2.
PAGE 7
3-Pin, Ultra-Low-Power SC70/SOT23 Voltage Detectors SOT23 L.EPS PACKAGE OUTLINE, 3L SOT-23 21-0051 F 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.