ANALOG DEVICES ADM6339 Service Manual

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

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rights of third parties that may result from its use. Specifications subject to change without notice. No
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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

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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

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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