Datasheet ADM6339 Datasheet (ANALOG DEVICES)

Quad Voltage Microprocessor

http://www.BDTIC.com/ADI

FEATURES

Accurate monitoring of up to four power supply voltages
6 factory-set threshold options: −5.0 V, +1.8 V, +2.5 V, +3.0 V,

+3.3 V, and +5.0 V

Adjustable input threshold options: −0.5 V (±2.0% accuracy),

+0.62 V (±0.8% accuracy), and +1.23 V
200 ms typical reset timeout
Open-drain
Reset output stage: active low, valid to IN
Low power consumption (55 μA)
Glitch immunity
Specified from −40°C to +85°C
6-lead SOT-23 package

APPLICATIONS

Telecommunications
Microprocessor systems
Data storage equipment
Servers/workstations

output (10 μA internal pull-up)

RESET

= 1 V or IN2 = 1 V

1

Supervisory Circuit

ADM6339

FUNCTIONAL BLOCK DIAGRAM

IN

IN

1

IN

2

200ms

IN

3

IN

4

V

REF

TIMEOUT

Figure 1.

1

5V PULLUP

ADM6339

IN

2

RESET

08169-001

GENERAL DESCRIPTION

The ADM6339 is a high accuracy supervisory circuit capable of
monitoring up to four system supply voltages.

The ADM6339 incorporates a variety of internally pretrimmed
undervoltage threshold options for monitoring −5.0 V, +1.8 V,
+2.5 V, +3.0 V, +3.3 V, and +5.0 V supply voltages. Tolerance levels
of ±5% and ±10% are available. The device is also available
with one to three adjustable threshold options. The adjustable
voltage threshold options are +1.23 V, +0.62 V, and −0.5 V. See
the Ordering Guide section for a list and description of all
available options.

If a monitored power supply voltage decreases below the mini­mum voltage threshold (or rises above the maximum voltage
threshold for the −0.5 V and −5.0 V input options), a single

active low output asserts, triggering a system reset. The output
is open drain with a weak internal pull-up to the monitored IN
supply of typically 10 µA. After all voltages exceed the selected
threshold level, the reset signal remains low for the reset
timeout period (200 ms typical).

The ADM6339 output remains valid as long as IN

or IN2 exceeds

1

1 V. Unused monitored inputs should not be allowed to float or
to be grounded; instead, they should be connected to a supply
voltage greater than their specified threshold voltages.

The ADM6339 is available in a 6-lead SOT-23 package. The
device operates over the extended temperature range of −40°C
to +85°C.

2

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2009–2010 Analog Devices, Inc. All rights reserved.

ADM6339

http://www.BDTIC.com/ADI

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications ..................................................................................... 3

Absolute Maximum Ratings ............................................................ 4

ESD Caution .................................................................................. 4

Pin Configuration and Function Descriptions ............................. 5

REVISION HISTORY

10/10—Rev. 0 to Rev. A

Added Figure 19 .............................................................................. 10

6/09—Revision 0: Initial Version

Typical Performance Characteristics ..............................................6

Theory of Operation .........................................................................8

Input Configuration ......................................................................8

Monitoring Negative Voltages < −5.0 V .....................................8

User Adjustable Threshold Options ...........................................8

RESET

Output Configuration .....................................................9

Outline Dimensions ....................................................................... 10

Ordering Guide .......................................................................... 10

Rev. A | Page 2 of 12

ADM6339

http://www.BDTIC.com/ADI

SPECIFICATIONS

V

= 1.0 V to 5.5 V, TA = −40°C to +85°C, unless otherwise noted. Typical values are V

IN2

Table 1.

Parameter Min Typ Max Units Test Conditions/Comments

OPERATING VOLTAGE RANGE (V
INPUT CURRENT

INx Input Current

55 115 μA V

−0.1 +0.1 μA V

0.4 1.5 μA V

−15 −20 μA V

−0.1 +0.1 μA V

−1 −3 −5 μA V
THRESHOLD VOLTAGE

Fixed Threshold Voltage (VTH) 4.50 4.63 4.75 V 5.0 V (−5% tolerance) threshold.

V

Decreasing 4.25 4.38 4.50 V 5.0 V (−10% tolerance) threshold.

INx

3.00 3.08 3.15 V 3.3 V (−5% tolerance) threshold.

2.85 2.93 3.00 V 3.3 V (−10% tolerance) threshold.

2.70 2.78 2.85 V 3.0 V (−5% tolerance) threshold.

2.55 2.63 2.70 V 3.0 V (−10% tolerance) threshold.

2.13 2.19 2.25 V 2.5 V (−10% tolerance) threshold.

1.53 1.58 1.62 V 1.8 V (−10% tolerance) threshold.
V

Increasing −4.75 −4.63 −4.50 V −5.0 V (+5% tolerance) threshold.

INx

−4.50 −4.38 −4.25 V −5.0 V (+10% tolerance) threshold.

Adjustable Threshold Voltage (VTH)

V

Decreasing 1.20 1.23 1.26 V

INx

0.615 0.620 0.625 V
V

Increasing −0.497 −0.487 −0.477 V −0.5 V threshold.

INx

RESET THRESHOLD HYSTERESIS (V

0.47 % VTH IN4, ADM6339Q model.
RESET THRESHOLD TEMPERATURE

COEFFICIENT (TCV

)

TH

INX to RESET DELAY (tRD) 30 μs V

RESET TIMEOUT PERIOD (tRP) 140 200 280 ms
RESET

OUTPUT LOW (VOL)

0.4 V V

RESET

OUTPUT HIGH (VOH)

RESET

OUTPUT HIGH SOURCE

CURRENT (I

1

The device is powered by Input IN2.

2

RESET

The

)

OH

output is guaranteed to be in the correct state for IN1 or IN2 down to 1 V.

1, 2

)

IN2

1.0

5.5 V

25 40 μA V

) 0.3 % VTH

HYST

60 ppm/°C

0.4 V V

0.4 V V

0.4 V V

0.4 V V
V

0.8 × V

IN2

10 μA

INx

IN2

also the device power supply. The supply splits into 25 μA for
the resistor divider and 30 μA for other circuits.

INx

IN1

INx

INx

INx

INx

V

INx

IN2

IN2

IN2

IN1

IN1

V

IN2

V

IN2

= 3.0 V to 3.3 V, TA = 25°C.

IN2

= nominal input voltage for 1.8 V, 2.5 V, and 5.0 V supplies.
= nominal input voltage for 3.0 V and 3.3 V supplies. V

= 0 V to V

(input threshold voltage = 1.23 V).

IN2

is

IN2

= 1.5 V (ADM6339K and ADM6639L models only).
= −5.0 V (INx input threshold voltage = −5.0 V).
= 0.62 V (INx input threshold voltage = 0.62 V).
= −0.5 V (INx input threshold voltage = −0.5 V).

= VTH to (VTH − 50 mV) for all inputs except −0.5 V and −5.0 V;

= VTH to (VTH + 50 mV) for −5.0 V and −0.5 V inputs only.

= 5.0 V, I
= 2.5 V, I

= V
=1V, V
=0 V, V
≥ 2.55 V, I

≥ 2.55 V,

= 1 V, I

IN1

SINK

SINK

= 0 V, I

IN2

= 1 V, I

IN2

RESET

SOURCE

= 2 mA.
= 1.2 mA.

= 50 μA.

SINK

= 20 μA

SINK

= 20 μA

SINK

= 6 μA,

not asserted.

RESET

not asserted.

Rev. A | Page 3 of 12

ADM6339

http://www.BDTIC.com/ADI

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

VCC, RESET, GND
Continuous RESET Current
INx (Positive Reset Threshold) −0.3 V to +6 V

IN4 (Negative Reset Threshold, −5 V)
IN4 ADM6339Q Model (Negative Reset

Threshold,
Storage Temperature Range −65°C to +125°C
Operating Temperature Range −40°C to +85°C
Lead Temperature (10 sec) 300°C
Junction Temperature 135°C

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may
affect device reliability.

−0.5 V)

−0.3 V to +6 V
20 mA

−6 V to +0.3 V

−2 V to +0.3 V

Table 3. Thermal Resistance

Package Type θJA Unit
6-Lead SOT-23 169.5 °C/W

ESD CAUTION

Rev. A | Page 4 of 12

ADM6339

http://www.BDTIC.com/ADI

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

IN

1

IN

2

IN

3

1

ADM6339

2

TOP VIEW

(Not to S cale)

3

6

5

4

RESET

GND

IN

4

08169-002

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1 IN1 Monitored Input Voltage 1.
2 IN2 Monitored Input Voltage 2. IN2 is the power supply input for the ADM6339.
3 IN3 Monitored Input Voltage 3.
4 IN4 Monitored Input Voltage 4.
5 GND Ground.
6

Active Low RESET Output. RESET goes low when an input drops below the specified threshold (or above in the

RESET

case of the −0.5 V and −5.0 V input options). After all inputs rise above the threshold voltage, RESET
for 200 ms (typical) before going high. RESET

is open drain with a weak internal pull-up to IN2, typically 10 μA.

remains low

Rev. A | Page 5 of 12

ADM6339

http://www.BDTIC.com/ADI

TYPICAL PERFORMANCE CHARACTERISTICS

V

= VCC = 3.0 V, TA = 25°C, unless otherwise noted.

IN2

60

58

56

54

52

50

48

INPUT CURRENT (µ A)

2

46

IN

44

V

42

40

–40 85

–15 10 35 60

TEMPERATURE (ºC)

IN2

V

IN2

Figure 3. IN2 Input Current vs. Temperature

= 3.3V
= 3V

08169-010

100

90

80

70

60

50

40

TRANSIENT DURATION (µs)

X

30

20

10

MAXIMUM IN

0

01

100 200 300 400 500 600 700 800 900

RESET THRESHOLD OVERDRI V E ( mV )

RESET ASSERT ED ABOV E T HI S LINE

08169-012

000

Figure 6. Maximum INx Transient Duration vs. Reset Threshold Overdrive

120

100

80

60

40

INPUT CURRENT (µ A)

2

IN

20

0

05

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
IN2 VOLTAGE (V)

08169-011

.5

Figure 4. IN2 Input Current vs. IN2 Voltage

0.05

0

–0.05

–0.10

–0.15

NORMALIZED THRESHOLD E RRO R ( %)

–0.20

–40 –20 0 20 40 60 80

TEMPERATURE (°C)

5V

1.8V

08169-007

Figure 5. Normalized Threshold Error vs. Temperature

100

90

80

70

60

50

40

RESET DELAY (µs)

30

20

10

0

01

100 200 300 400 500 600 700 800 900

RESET

Figure 7.

214

212

210

208

206

RESET TIMEOUT DELAY (mS)

204

202

Delay vs. Reset Threshold Overdrive (INx Decreasing)

–40 85

Figure 8. Reset Timeout Delay vs. Temperature

RESET THRESHOLD OVERDRI V E ( mV )

–15103560

TEMPERATURE ( ºC)

08169-013

000

08169-014

Rev. A | Page 6 of 12

ADM6339

V

–

V

http://www.BDTIC.com/ADI

IN

C3

x

RESET

IN

C3

x

C2

C2 DC1M

BwL C3 DC1M

2.00V/div

–6.000V offset

RESET

Figure 9.

0.630

0.625

0.620

TRIP THRESHOL D ( V )

IN

0.615

0.62V

0.610
–40 –20 0 20 40 60 80

BwL Timebase 0.0µs

1.00V/div

2.040V offset

10.0 µs/div

2.0 GS/s200kS

Pull-Up and Pull-Down Response (10 μs/Div)

TEMPERATURE (°C)

Figure 10. 0.62 V Input Voltage Trip Threshold vs. Temperature

Trigger 0.0µs

–520mVSTOP

NEGATIVEEDGE

C2

08169-015

–0.495

–0.500

TRIP THRESHOL D ( V )

IN

–0.505

–0.5V

–0.510

8169-009

RESET

C2 DC1M

BwL C3

2.00V/div

–6.000V offset

Figure 11.

0.490

–40–200 20406080

BwL

DC1M –101ms C3Timebase

2.00V/div

2.000V offset

RESET

Timeout Delay (50 ms/Div)

TEMPERATURE (°C)

50.0 ms/div

1.0 MS/s500kS

Trigger DC

680mVNormal

PositiveEdge

08169-016

8169-008

Figure 12. −0.5 V Input Voltage Trip Threshold vs. Temperature

Rev. A | Page 7 of 12

ADM6339

V

http://www.BDTIC.com/ADI

THEORY OF OPERATION

The ADM6339 is a compact, low power supervisory circuit that
is capable of monitoring up to four voltages in a multisupply
application.

The device includes several factory-set voltage threshold options
f or m o n i t o r i n g − 5 . 0 V, +1 .8 V, + 2. 5 V, +3 . 0 V, + 3 . 3 V, a nd +5 .0 V
supplies. The ADM6339 is available with one to three adjustable
threshold options. The adjustable voltage threshold options
available are +1.23 V, +0.62 V, and −0.5 V. See the Ordering Guide
section for a list and description of all available options.

INPUT CONFIGURATION

Built-in hysteresis improves the ADM6339’s immunity to short
input transients, without noticeably reducing the threshold
accuracy. The internal comparators each have a hysteresis of

0.3% with respect to the reset threshold voltage. (The IN

input

4

of the ADM6339Q model has a hysteresis of 0.47% with respect
to its reset threshold voltage of −0.487 V.)

Monitored inputs are resistant to short power supply glitches.
Figure 6 depicts the ADM6339 glitch immunity data. To
increase noise immunity in noisy applications, place a 0.1 F
capacitor between the IN
to IN

, IN3, and IN4 also improves noise immunity.

1

MONITORED

SUPPLIES

Figure 13. Typical Applications Circuit

input and ground. Adding capacitance

2

ADM6339

IN

1

IN

2

RESET

IN

3

IN

4

GND

MICROPROCESSOR

08169-003

IN2 must always be used for normal operation because it is the
device’s power supply input. Do not allow unused monitor
inputs to float or to be grounded. Unused IN
positive thresholds can be connected directly to the IN
Unused IN

options with negative thresholds must be tied to a

4

or IN4 inputs with

3

input.

2

more negative supply.

MONITORING NEGATIVE VOLTAGES < −5.0 V

A number of ADM6339 models include a pretrimmed threshold
option to monitor −5.0 V voltage levels. Use a low impedance
resistor divider network similar to that shown in Figure 14 to
monitor supplies more negative than −5.0 V.

The current through the external resistor divider should be
greater than the input current for the −5.0 V monitor options.

For an input monitor current error of <1%, the resistor network
current should be greater than or equal to 2 mA (for I
maximum). Set R
V

reset threshold voltage, using the following equation:

INTH

= R2((V

R

1

= 2.5 k. Calculate R1 based on the desired

2

) − 1)

INTH/VTH

= 20 µA

IN4

where:
R

≤ 2.49 k.

2

V

is the desired threshold voltage.

INTH

V

is the internal threshold voltage.

TH

For example, when monitoring a nominal voltage of −12 V,
V

= −11.1 V, VTH = −4.63 V, and R2 = 2.49 k. Therefore,

INTH

using the previous equation, R

R

2

R

1

V

INTH

Figure 14. Negative Voltage Monitoring

= 3.48 k.

1

ADM6339

08169-004

USER ADJUSTABLE THRESHOLD OPTIONS

The ADM6339 offers the choice of three adjustable INx input
threshold voltages: +1.23 V, +0.62 V, or −0.5 V.

When using an adjustable threshold of 1.23 V (typical), to
monitor a voltage greater than 1.23 V, connect a resistor divider
network to the device as shown in Figure 15. V
threshold voltage, can be expressed as

V

= 1.23 V((R1 + R2)/(R2))

INTH

The ADM6339 has a guaranteed input current of ±0.1 µA on its

1.23 V adjustable input. Resistor values up to 100 k can be
used for R

with <1% error.

2

INTH

1

2

ADM6339

V

= 1.23V

REF

R

R

Figure 15. Setting the 1.23 V Adjustable Monitor

The same approach is taken when using the 0.62 V (typical)
adjustable threshold input. Use the following equation to solve
for the values of R

V

= 0.62 V((R1 + R2)/(R2))

INTH

and R2:

1

The 0.62 V (typical) adjustable threshold input offers high
threshold accuracy of ±0.8%.

INTH

8169-005

, the desired

Rev. A | Page 8 of 12

ADM6339

V

V

http://www.BDTIC.com/ADI

When monitoring a voltage more negative than −0.5 V, a
scheme similar to that previously described in the Monitoring
Negative Voltages < −5.0 V section is used. For an input
monitor current error of <1%, the resistor network current
should be ≥500 µA (for I
based on the desired V

= 5 µA maximum). Calculate R1

IN4

reset threshold voltage, using the

INTH

following equation:

R

where V

= R2((V

1

INTH/VTH

is the desired threshold voltage and VTH is the

INTH

) − 1)

internal threshold voltage, −0.487 V (typical).

RESET OUTPUT CONFIGURATION

RESET

The
drops below its voltage threshold (or goes above its associated
threshold in the case of the −0.5 V and −5.0 V input options).
After all voltages exceed their associated threshold level, the
reset signal remains low for the reset timeout period, t
(200 ms typical).

output asserts low if a monitored INx voltage

IN

V

x

TH

RP

RESET

is open drain with a weak internal pull-up to IN2 of
10 A (typical). Many applications that interface with other
logic devices do not require an external pull-up resistor.
However, if an external pull-up resistor is required and it is
connected to a voltage ranging from 0 V to 5.5 V, the resistor
overdrives the internal pull-up. Reverse current flow from the
external pull-up voltage to IN

is prevented by the internal

2

circuitry.

V

RESET

5

CC

08169-006

IN2= 3.3

ADM6339

Figure 17. Interfacing with a Different Logic Supply Voltage

100kΩ

RESET

RESET

t

RD

10%

Figure 16. ADM6339

RESET

t

RP

Timing

90%

08169-017

Rev. A | Page 9 of 12

ADM6339

0

0

http://www.BDTIC.com/ADI

OUTLINE DIMENSIONS

INDICATOR

.15 MAX
.05 MIN

1.30

1.15

0.90

3.00

2.90

2.80

1.70

1.60

1.50

PIN 1

65

123

4

1.90
BSC

0.50 MAX

0.30 MIN

COMPLIANT TO JEDEC STANDARDS MO-178-AB

0.95 BSC

1.45 MAX

0.95 MIN

3.00

2.80

2.60

SEATING
PLANE

0.20 MAX

0.08 MIN

Figure 18. 6-Lead Small Outline Transistor Package [SOT-23]

(RJ-6)

Dimensions shown in millimeters

ROUND SPROCKET HOLES

PIN 1 MARKER

10°

0.55

0.60

4°

BSC

0°

0.45

0.35

121608-A

DIRECTION OF FEED

08169-018

Figure 19. ADM6339 Reel Orientation

ORDERING GUIDE

1, 2

Model

ADM6339AARJZ-RL7 5.0 3.3 2.5 Adj (1.23) 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBF
ADM6339BARJZ-RL7 5.0 3.3 2.5 Adj (1.23) 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBH
ADM6339CARJZ-RL7 5.0 3.3 1.8 Adj (1.23) 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBJ
ADM6339DARJZ-RL7 5.0 3.3 1.8 Adj (1.23) 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBK
ADM6339EARJZ-RL7 5.0 3.0 2.5 Adj (1.23) 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBL
ADM6339FARJZ-RL7 5.0 3.0 2.5 Adj (1.23) 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBM
ADM6339GARJZ-RL7 5.0 3.0 1.8 Adj (1.23) 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBN
ADM6339HARJZ-RL7 5.0 3.0 1.8 Adj (1.23) 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBP
ADM6339IARJZ-RL7 5.0 3.3 2.5 1.8 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBQ
ADM6339JARJZ-RL7 5.0 3.3 2.5 1.8 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBR
ADM6339KARJZ-RL7 Adj (1.23) 3.3 2.5 Adj (1.23) 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBS
ADM6339LARJZ-RL7 Adj (1.23) 3.3 2.5 Adj (1.23) 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBU
ADM6339MARJZ-RL7 5.0 3.0 Adj (1.23) −5.0 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MB6
ADM6339NARJZ-RL7 5.0 3.0 Adj (1.23) −5.0 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MB7
ADM6339OARJZ-RL7 5.0 3.3 Adj (1.23) −5.0 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MB8
ADM6339PARJZ-RL7 5.0 3.3 Adj (1.23) −5.0 5 −40°C to +85°C 6-Lead SOT-23 RJ-6 MB5
ADM6339QARJZ-RL7 Adj (0.62) 3.3 Adj (0.62) Adj (−0.5) 10 −40°C to +85°C 6-Lead SOT-23 RJ-6 MBX

1

Z = RoHS Compliant Part.

2

Nominal input voltage is specified with 10% tolerance.

Nominal Input Voltage (V)

To le ra n ce
(%)

Temperature
Range

Package
Description

Package
Option

Branding IN1 IN2 IN3 IN4

Rev. A | Page 10 of 12

ADM6339

http://www.BDTIC.com/ADI

NOTES

Rev. A | Page 11 of 12

ADM6339

http://www.BDTIC.com/ADI

NOTES

©2009–2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D08169-0-10/10(A)

Rev. A | Page 12 of 12