Maxim MAX6382XR29D6-T Datasheet

General Description

The MAX6381–MAX6390 microprocessor (µP) supervisory
circuits monitor power supply voltages from +1.8V to
+5.0V while consuming only 3µA of supply current at
+1.8V. Whenever VCCfalls below the factory-set reset
thresholds, the reset output asserts and remains assert­ed for a minimum reset timeout period after VCCrises
above the reset threshold. Reset thresholds are available
from +1.58V to +4.63V, in approximately 100mV incre­ments. Seven minimum reset timeout delays ranging
from 1ms to 1200ms are available.

The MAX6381/MAX6384/MAX6387 have a push-pull
active-low reset output. The MAX6382/MAX6385/
MAX6388 have a push-pull active-high reset output,
and the MAX6383/MAX6386/MAX6389/MAX6390
have an open-drain active-low reset output. The
MAX6384/MAX6385/MAX6386 also feature a
debounced manual reset input (with internal pullup
resistor). The MAX6387/MAX6388/MAX6389 have an
auxiliary input for monitoring a second voltage. The
MAX6390 offers a manual reset input with a longer V

CC

reset timeout period (1120ms or 1200ms) and a shorter
manual reset timeout (140ms or 150ms).

The MAX6381/MAX6382/MAX6383 are available in 3-pin
SC70 packages and the MAX6384–MAX6390 are avail­able in 4-pin SC70 packages.

________________________Applications

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

Dual Voltage Systems

Features

♦ Factory-Set Reset Threshold Voltages Ranging

from +1.58V to +4.63V in Approximately 100mV
Increments

♦ ±2.5% Reset Threshold Accuracy Over

Temperature (-40°C to +125°C)

♦ Seven Reset Timeout Periods Available: 1ms,

20ms, 140ms, 280ms, 560ms, 1120ms,
1200ms (min)

♦ 3 Reset Output Options

Active-Low Push-Pull
Active-High Push-Pull
Active-Low Open-Drain

♦ Reset Output State Guaranteed Valid

Down to V

CC

= 1V

♦ Manual Reset Input (MAX6384/MAX6385/MAX6386)

♦ Auxiliary RESET IN

(MAX6387/MAX6388/MAX6389)

♦ V

CC

Reset Timeout (1120ms or 1200ms)/Manual

Reset Timeout (140ms or 150ms) (MAX6390)

♦ Negative-Going V

CC

Transient Immunity

♦ Low Power Consumption of 6µA at +3.6V

and 3µA at +1.8V

♦ Pin Compatible with

MAX809/MAX810/MAX803/MAX6326/MAX6327/
MAX6328/MAX6346/MAX6347/MAX6348,
and MAX6711/MAX6712/MAX6713

♦ Tiny 3-Pin SC70 and 4-Pin SC70 Packages

MAX6381–MAX6390

SC70, Single/Dual Low-Voltage,

Low-Power µP Reset Circuits

________________________________________________________________ Maxim Integrated Products 1

RESET

(RESET)

1

3 V

CC

GND

MAX6381
MAX6382
MAX6383

TOP VIEW

2

SC70

( ) IS FOR MAX6382

PART TEMP. RANGE PIN-PACKAGE

MAX6381XR_ _D_-T -40°C to +125°C 3 SC70-3

MAX6382XR_ _D_-T -40°C to +125°C 3 SC70-3

MAX6383XR_ _D_-T -40°C to +125°C 3 SC70-3

Pin Configurations

19-1839; Rev 1; 04/01

Ordering Information

Pin Configurations continued at end of data sheet.

Ordering Information continued at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Selector Guide appears at end of data sheet.

Note: Insert reset threshold suffix (see Reset Threshold table)

after "XR" or "XS". Insert reset timeout delay (see Reset Timeout
Delay table) after "D" to complete the part number. Sample
stock is generally held on standard versions only (see
Standard Versions table). Standard versions have an order
increment requirement of 2500 pieces. Nonstandard versions
have an order increment requirement of 10,000 pieces.
Contact factory for availability of nonstandard versions.

*MAX6390 is available with D4 or D7 timing only.

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.

MAX6381–MAX6390

SC70, Single/Dual Low-Voltage,
Low-Power µP Reset Circuits

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= full range, TA= -40°C to +125°C, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

V

CC

to GND ..........................................................-0.3V to +6.0V

RESET Open-Drain Output....................................-0.3V to +6.0V

RESET, RESET (Push-Pull Output) .............-0.3V to (V

CC

+ 0.3V)

MR, RESET IN.............................................-0.3V to (V

CC

+ 0.3V)

Input Current (V

CC

).............................................................20mA

Output Current (All Pins) .....................................................20mA

Continuous Power Dissipation (T

A

= +70°C)

3-Pin SC70 (derate 2.9mW/°C above +70°C)........235mW

4-Pin SC70 (derate 3.1mW/°C above +70°C)........245mW

Operating Temperature Range .........................-40°C to +125°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Voltage Range V

CC

1.0 5.5 V

VCC = 5.5V, no load 7 13

VCC = 3.6V, no load 6 11

VCC = 2.5V, no load 4 7

VCC Supply Current I

CC

VCC = 1.8V, no load 3 6

µA

TA = +25°C

V

TH

-

1.5%

V

TH

V

TH

+

1.5%

V

CC

Reset Threshold

(See Reset Thresholds table)

V

TH

TA = -40°C to +125°C

V

TH

-

2.5%

V

TH

V

TH

+

2.5%

V

Reset Threshold Tempco ∆VTH/°C 60 ppm/°C

VCC to Reset Delay

V

CC

falling at 10mV/µs from V

TH

+ 100mV

to V

TH

- 100mV

35 µs

D1 1 2

D2 20 40

D3 140 280

D5 280 560

D6 560 1120

D4 1120 2240

Reset Timeout Period
MAX6381–MAX6389
(See Reset Timeout table)

t

RP

D7 1200 2400

ms

D4 140 280

MR timeout period

D7 150 300

D4 1120 2240

Reset Timeout Period
MAX6390

t

RP

VCC timeout period

D7 1200 2400

ms

V

IL

0.3

✕

V

CC

V

IH

VTH < 4V

0.7

✕

V

CC

V

IL

0.8

MR Input Voltage

V

IH

VTH > 4V

2.4

V

MAX6381–MAX6390

SC70, Single/Dual Low-Voltage,

Low-Power µP Reset Circuits

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= full range, TA= -40°C to +125°C, unless otherwise specified. Typical values are at TA= +25°C.) (Note 1)

Note 1: Specifications over temperature are guaranteed by design, not production tested.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MR Minimum Input Pulse Width 1 µs
MR Glitch Rejection 100 ns
MR to Reset Delay 200 ns

MAX6381–MAX6389 32 63 100 kΩ

MR Internal Pullup Resistance

MAX6390 800 1350 2300 Ω

TA = +25°C 1.245 1.27 1.295

TA = 0°C to +85°C 1.232 1.308

Reset IN Input Threshold V

THRST

TA = -40°C to +125°C 1.219 1.321

V

RESET IN to RESET Delay

V

RESETIN

falling at 4mV/µs from

V

THRST

+ 40mV to V

THRST

- 40mV

4.5 µs

RESET IN Input Leakage Current I

RESET

IN

-50 ±1 +50 nA

VCC ≥ 4.5V, I

SINK

= 3.2mA, reset asserted 0.4

VCC ≥ 2.5V, I

SINK

= 1.2mA, reset asserted 0.3

Open-Drain RESET Output
Voltage

V

OL

VCC ≥ 1.0V, I

SINK

= 80µA, reset asserted 0.3

V

Open-Drain RESET Output
Leakage Current

I

LKG

VCC > VTH, RESET not asserted 1.0 µA

VCC ≥ 4.5V, I

SINK

= 3.2mA, reset asserted 0.4

VCC ≥ 2.5V, I

SINK

= 1.2mA, reset asserted 0.3

V

OL

VCC ≥ 1.0V, I

SINK

= 80µA, reset asserted 0.3

VCC ≥ 4.5V, I

SOURCE

= 800µA, reset not

asserted

0.8

✕

V

CC

Push-Pull RESET Output Voltage

V

OH

VCC ≥ 2.5V, I

SOURCE

= 500µA, reset not

asserted

0.8

✕

V

CC

V

VCC ≥ 4.5V, I

SOURCE

= 800µA, reset asserted

0.8

✕

V

CC

VCC ≥ 2.5V, I

SOURCE

= 500µA, reset asserted

0.8

✕

V

CC

VCC ≥ 1.8V, I

SOURCE

= 150µA, reset asserted

0.8

✕

V

CC

V

OH

VCC ≥ 1.0V, I

SOURCE

= 1µA, reset asserted

0.8

✕

V

CC

VCC ≥ 4.5V, I

SINK

= 3.2mA, reset not

asserted

0.4

Push-Pull RESET Output Voltage

V

OL

VCC ≥ 2.5V, I

SINK

= 1.2mA, reset not

asserted

0.3

V

MAX6381–MAX6390

SC70, Single/Dual Low-Voltage,
Low-Power µP Reset Circuits

4 ______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

2

1

5

4

3

6

7

8

9

-40 -10 5-25 20 35 50 65 80 95 110 125

SUPPLY CURRENT vs. TEMPERATURE

(NO LOAD)

MAX6381/90 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

VCC = +5.5V

VCC = +3.6V

VCC = +1.8V

V

CC

= +2.5V

25

29

27

35

33

31

37

39

41

43

-40 -10 5-25 20 35 50 65 80 95 110 125

POWER-DOWN RESET DELAY

vs. TEMPERATURE

MAX6381/90 toc02

TEMPERATURE (°C)

POWER-DOWN RESET DELAY (µs)

VCC = +3.0V

VCC = +1.8V

0.94

0.98

0.96

1.02

1.00

1.06

1.04

1.08

-40 -10 5 20-25 35 50 65 80 95 110 125

NORMALIZED POWER-UP RESET TIMEOUT

vs. TEMPERATURE

MAX6381/90 toc03

TEMPERATURE (°C)

NORMALIZED RESET TIMEOUT PERIOD

0.990

0.985

1.015

0.995

0.990

1.000

1.005

1.010

1.020

-40 -10 5 20-25 35 50 9580 11065 125

MAX6381/90 toc04

TEMPERATURE (°C)

NORMALIZED RESET THRESHOLD

NORMALIZED RESET THRESHOLD

vs. TEMPERATURE

0

0.4

0.2

0.8

0.6

1.0

1.2

063912

OUTPUT VOLTAGE LOW

vs. SINK CURRENT

MAX6381/90 toc05

I

SINK

(mA)

V

OL

(V)

VCC = +3.0V

VCC = +4.5V

0

1.0

0.5

2.0

1.5

2.5

3.0

0 500 750250 1000 1250 1500

OUTPUT VOLTAGE HIGH

vs. SOURCE CURRENT

MAX6381/90 toc06

I

SOURCE

(µA)

V

OH

(V)

VCC = +2.5V

VCC = +1.8V

450

0

1 100010010

MAXIMUM TRANSIENT DURATION

vs. RESET COMPARATOR OVERDRIVE

150

50

350

250

500

200

100

400

300

MAX6381/90 toc07

RESET COMPARATOR OVERDRIVE, VTH - VCC (mV)

MAXIMUM TRANSIENT DURATION (µs)

RESET ASSERTED
ABOVE THIS LINE

3.5

3.9

3.7

4.5

4.3

4.1

4.7

4.9

5.3

5.1

5.5

-40 -10 5-25 20 35 50 65 80 95 110 125

RESET IN TO RESET DELAY

vs. TEMPERATURE

MAX6381/90 toc08

TEMPERATURE (°C)

RESET IN DELAY (µs)