Maxim MAX6322HPUK50C-T, MAX6322HPUK50D-T, MAX6322HPUK46D-T, MAX6322HPUK47A-T, MAX6322HPUK47B-T Datasheet

___________________________________________________________________Selector Guide

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].

________________General Description

The MAX6316–MAX6322 family of microprocessor (µP)
supervisory circuits monitors power supplies and
microprocessor activity in digital systems. It offers sev­eral combinations of push/pull, open-drain, and bidirec­tional (such as Motorola 68HC11) reset outputs, along
with watchdog and manual-reset features. The

Selector

Guide

below lists the specific functions available from
each device. These devices are specifically designed
to ignore fast negative transients on VCC. Resets are
guaranteed valid for VCCdown to 1V.

These devices are available in 26 factory-trimmed reset
threshold voltages (from 2.5V to 5V, in 100mV incre­ments), featuring four minimum power-on reset timeout
periods (from 1ms to 1.12sec), and four watchdog time­out periods (from 6.3ms to 25.6sec). Nine standard ver­sions are available with an order increment requirement
of 2500 pieces (see

Standard Versions

table); contact
the factory for availability of other versions, which have
an order increment requirement of 10,000 pieces.

The MAX6316–MAX6322 are offered in a miniature
5-pin SOT23 package.

________________________Applications

Portable Computers
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Embedded Control Systems

____________________________Features

♦ Small 5-Pin SOT23 Package
♦ Available in 26 Reset Threshold Voltages

2.5V to 5V, in 100mV Increments

♦ Four Reset Timeout Periods

1ms, 20ms, 140ms, or 1.12sec (min)

♦ Four Watchdog Timeout Periods

6.3ms, 102ms, 1.6sec, or 25.6sec (typ)

♦ Four Reset Output Stages

Active-High, Push/Pull
Active-Low, Push/Pull
Active-Low, Open-Drain
Active-Low, Bidirectional

♦ Guaranteed Reset Valid to VCC= 1V
♦ Immune to Short Negative VCCTransients
♦ Low Cost
♦ No External Components

MAX6316–MAX6322

5-Pin µP Supervisory Circuits with

Watchdog and Manual Reset

________________________________________________________________

Maxim Integrated Products

1

19-0496; Rev 3; 1/99

PART

MAX6316LUK____-T

MAX6316MUK____-T -40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

5 SOT23-5
5 SOT23-5

_______________Ordering Information

Ordering Information continued at end of data sheet.

MAX6317HUK____-T

-40°C to +85°C 5 SOT23-5

MAX6318HUK____-T

-40°C to +85°C 5 SOT23-5

ACTIVE-LOW
OPEN-DRAIN

MAX6316L
MAX6316M
MAX6317H

✔

✔

✔

MAX6321HP

✔

✔
✔
✔

MAX6318LH

✔

—

MAX6318MH**

✔

—

MAX6319LH —

✔

MAX6319MH** —

✔

MAX6320P

✔ ✔

ACTIVE-LOW

PUSH/PULL

✔

—
—

✔

—

✔

—
—

ACTIVE-HIGH

PUSH/PULL

—
—

✔
✔
✔
✔
✔

—

ACTIVE-LOW

BIDIRECTIONAL

—

✔

—
—

✔

—

✔

—

PART

WATCHDOG

INPUT

MANUAL

RESET
INPUT

— —

✔

—

—

✔

MAX6322HP —

✔

—
—
—
—
—
—

✔

RESET OUTPUTS*

—

✔

—

✔

*

The MAX6318/MAX6319/MAX6321/MAX6322 feature two types of reset output on each device.

**

Future product—contact factory for availability.

MAX6318MHUK____-T -40°C to +85°C 5 SOT23-5

Typical Operating Circuit and Pin Configurations appear at
end of data sheet.

ELECTRICAL CHARACTERISTICS

(VCC= 2.5V to 5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

MAX6316–MAX6322

5-Pin µP Supervisory Circuits with
Watchdog and Manual Reset

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

Voltage (with respect to GND)

V

CC

......................................................................-0.3V to +6V

RESET (MAX6320/MAX6321/MAX6322 only)...... -0.3V to +6V

All Other Pins.........................................-0.3V to (V

CC

+ 0.3V)

Input/Output Current, All Pins .............................................20mA

Continuous Power Dissipation (T

A

= +70°C)

SOT23-5 (derate 7.1mW/°C above +70°C)...............571mW

Operating Temperature Range............................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range..............................-65°C to +160°C

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

VCC- 1.5

0.8 x V

CC

V

OH

0.4

0.3

0.3
V

0.3

V

OL

RESET Output Voltage

µs40t

RD

VCCto RESET Delay

1120 1600 2240

140 200 280

20 28 40

ms

1 1.4 2

t

RP

Reset Active Timeout Period

mV3Reset Threshold Hysteresis

V1 5.5V

CC

Operating Voltage Range

VTH-2.5% VTHVTH+2.5%

V

VTH-1.5% VTHVTH+1.5%

V

RST

Reset Threshold (Note 2)

ppm/°C40

∆VTH/°C

Reset Threshold Temperature
Coefficient

UNITSMIN TYP MAXSYMBOLPARAMETER

VCC≥ 4.5V, I

SOURCE

= 800µA

VCC≥ 2.7V, I

SOURCE

= 500µA

VCC≥ 4.5V, I

SINK

= 3.2mA

VCC≥ 2.7V, I

SINK

= 1.2mA

VCC≥ 1.2V, I

SINK

= 100µA

VCC≥ 1.0V, I

SINK

= 50µA

TA= -40°C to +85°C

VCCfalling at 1mV/µs

MAX63_ _D_-T

TA= -40°C to +85°C

TA= +25°C

MAX63_ _C_-T

MAX63_ _B_-T

MAX63_ _A_-T

CONDITIONS

V

0.3

V

OL

RESET Output Voltage

VCC≥ 2.7V, I

SINK

= 1.2mA

0.4VCC≥ 4.5V, I

SINK

= 3.2mA

0.8 x V

CC

V

OH

VCC≥ 1.8V, I

SOURCE

= 150µA

0.8 x V

CC

VCC≥ 2.7V, I

SOURCE

= 500µA

VCC- 1.5VCC≥ 4.5V, I

SOURCE

= 800µA

Note 1: Over-temperature limits are guaranteed by design, not production tested.
Note 2: A factory-trimmed voltage divider programs the nominal reset threshold (V

TH

). Factory-trimmed reset thresholds are

available in 100mV increments from 2.5V to 5V (see Table 1 at end of data sheet).

MAX6316/MAX6317/MAX6318/
MAX6320/MAX6321:
MR and WDI unconnected

µA

10 20

I

CC

Supply Current

VCC= 5.5V

512VCC= 3.6V

MAX6319/MAX6322:
MR unconnected

512VCC= 5.5V
38VCC= 3.6V

PUSH/PULL RESET OUTPUT (MAX6316L/MAX6317H/MAX6318_H/MAX6319_H/MAX6321HP/MAX6322HP)

MAX6316–MAX6322

5-Pin µP Supervisory Circuits with

Watchdog and Manual Reset

_______________________________________________________________________________________ 3

Note 3: This is the minimum time RESET must be held low by an external pull-down source to set the active pull-up flip-flop.
Note 4: Measured from RESET V

OL

to (0.8 x VCC), R

LOAD

= ∞.

Note 5: WDI is internally serviced within the watchdog period if WDI is left unconnected.
Note 6: The WDI input current is specified as the average input current when the WDI input is driven high or low. The WDI input is

designed for a three-stated-output device with a 10µA maximum leakage current and capable of driving a maximum capaci­tive load of 200pF. The three-state device must be able to source and sink at least 200µA when active.

µA1.0I

LKG

Open-Drain Reset Output
Leakage Current

ns400t

S

Transition Flip-Flop Setup Time

333

ns

333

t

R

RESET Output Rise Time
(Note 4)

UNITSMIN TYP MAXSYMBOLPARAMETER

(Note 3)

VCC= 5.0V, CL= 200pF

VCC= 3.0V, CL= 120pF

CONDITIONS

ELECTRICAL CHARACTERISTICS (continued)

(VCC= 2.5V to 5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

666

666

VCC= 5.0V, CL= 400pF

VCC= 3.0V, CL= 250pF

V0.4 0.65V

PTH

Active Pull-Up Enable Threshold VCC= 5.0V

mA20

RESET Active Pull-Up Current

VCC= 5.0V

kΩ

4.2 4.7 5.2

RESET Pull-Up Resistance

V

0.3

V

OL

RESET Output Voltage

VCC≥ 1.0V, I

SINK

= 50µA

0.3VCC≥ 1.2V, I

SINK

= 100µA

0.3VCC≥ 2.7V, I

SINK

= 1.2mA

0.4VCC≥ 4.5V, I

SINK

= 3.2mA

ms

4.3 6.3 9.3

t

WD

Watchdog Timeout Period

MAX63_ _ _ W-T

71 102 153MAX63_ _ _ X-T

sec

1.12 1.6 2.4MAX63_ _ _ Y-T

17.9 25.6 38.4MAX63_ _ _ Z-T
ns50t

WDI

WDI Pulse Width VIL= 0.3 x VCC, VIH= 0.7 x V

CC

V

0.3 x V

CC

V

IL

WDI Input Threshold (Note 5)

0.7 x V

CC

120 160

I

WDI

WDI Input Current
(Note 6)

WDI = VCC, time average

-20 -15V

WDI

= 0, time average

V

IH

V

0.8V

IL

MR Input Threshold

VTH> 4.0V

2.0V

IH

0.3 x V

CC

V

IL

VTH< 4.0V

0.7 x V

CC

V

IH

µs1

MR Input Pulse Width

ns100

MR Glitch Rejection

kΩ

35 52 75

MR Pull-Up Resistance

ns230

MR to Reset Delay

VCC= 5V

µA

BIDIRECTIONAL RESET OUTPUT (MAX6316M/MAX6318MH/MAX6319MH)

OPEN-DRAIN RESET OUTPUT (MAX6320P/MAX6321HP/MAX6322HP)

WATCHDOG INPUT (MAX6316/MAX6317H/MAX6318_H/MAX6320P/MAX6321HP)

MANUAL-RESET INPUT (MAX6316_/MAX6317H/MAX6319_H/MAX6320P/MAX6322HP)

MAX6316–MAX6322

5-Pin µP Supervisory Circuits with
Watchdog and Manual Reset

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

0

2
1

4
3

8
7
6
5

10

9

-40 0 20-20 40 60 80 100

MAX6316/17/18/20/21

SUPPLY CURRENT vs. TEMPERATURE

MAX6316toc01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

VCC = 5V

VCC = 3V

VCC = 1V

0

30
20
10

50
40

90
80
70
60

100

-40 -20 0 20 40 60 80 100

VCC FALLING TO RESET PROPAGATION

DELAY vs. TEMPERATURE

MAX6316toc03

TEMPERATURE (°C)

RESET PROPAGATION DELAY (µs)

VCC FALLING AT 1mV/µs
V

RST

- VCC = 100mV

140

180
160

240
220
200

300
280
260

320

-40 0 20-20 40 60 80 100

MAX6316/17/19/20/22

MANUAL-RESET TO RESET

PROPAGATION DELAY vs. TEMPERATURE

MAX6316toc04

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

VCC = 5V

0.95

0.98

0.97

0.96

1.00

0.99

1.04

1.03

1.02

1.01

1.05

-40 -20 0 20 40 60 80 100

NORMALIZED RESET TIMEOUT

PERIOD vs. TEMPERATURE

MAX6316toc05

TEMPERATURE (°C)

NORMALIZED RESET TIMEOUT PERIOD

0.95

0.98

0.97

0.96

1.00

0.99

1.04

1.03

1.02

1.01

1.05

-40 -20 0 20 40 60 80 100

MAX6316/17/18/20/21

NORMALIZED WATCHDOG TIMEOUT

PERIOD vs. TEMPERATURE

MAX6316toc06

TEMPERATURE (°C)

NORMALIZED WATCHDOG TIMEOUT PERIOD

80

0

10 100 1000

MAXIMUM VCC TRANSIENT DURATION

vs. RESET THRESHOLD OVERDRIVE

20
10

MAX6316toc08

RESET THRESHOLD OVERDRIVE (mV) V

RST

- V

CC

TRANSIENT DURATION (µs)

30

50

60

40

70

V

RST

= 3.3V

V

RST

= 4.63V

V

RST

= 2.63V

RESET OCCURS ABOVE LINES

PASSIVE

4.7kΩ
PULL-UP
2V/div

RESET, ACTIVE
PULL-UP
2V/div

RESET
INPUT
5V/div

200ns/div

MAX6316M/6318MH/6319MH

BIDIRECTIONAL

PULL-UP CHARACTERISTICS

MAX6316toc09

100pF

4.7k

+5V

74HC05

74HC05

V

CC

GND

MR

100pF

INPUT

INPUT

+5V

RESET

MAX6316–MAX6322

5-Pin µP Supervisory Circuits with

Watchdog and Manual Reset

_______________________________________________________________________________________ 5

______________________________________________________________Pin Description

11—

MAX6316M/MAX6318MH/MAX6319MH:
Bidirectional, Active-Low, Reset Output.
Intended to interface directly to microprocessors
with bidirectional resets such as the Motorola
68HC11.

MAX6320P/MAX6321HP/MAX6322HP:
Open-Drain, Active-Low, Reset Output. NMOS out­put (sinks current only). Connect a pull-up resistor
from RESET to any supply voltage up to 6V.

MAX6316L/MAX6318LH/MAX6319LH:
Active-Low, Reset Output. CMOS push/pull
output (sources and sinks current).

RESET

1

4

—

5

3

2

MAX6319LH
MAX6319MH
MAX6322HP

PIN

—

4

5

3

2

MAX6318LH
MAX6318MH
MAX6321HP

3

4

5

1

2

MAX6317H

Active-Low, Manual Reset Input. Pull low to force a
reset. Reset remains asserted for the duration of
the Reset Timeout Period after MR transitions from
low to high. Leave unconnected or connected to
V

CC

if not used.

MR

3

Watchdog Input. Triggers a reset if it remains
either high or low for the duration of the watchdog
timeout period. The internal watchdog timer clears
whenever a reset asserts or whenever WDI sees a
rising or falling edge. To disable the watchdog fea­ture, leave WDI unconnected or three-state the dri­ver connected to WDI.

WDI4

Supply Voltage. Reset is asserted when V

CC

drops below the Reset Threshold Voltage (V

RST

).
Reset remains asserted until VCCrises above
V

RST

and for the duration of the Reset Timeout

Period (tRP) once VCCrises above V

RST

.

V

CC

5

Active-High, Reset Output. CMOS push/pull output
(sources and sinks current). Inverse of RESET.

RESET—

GroundGND2

MAX6316L

MAX6316M

MAX6320P

FUNCTIONNAME