ADM706RAR Analog Devices Inc, ADM706RAR Datasheet

ADM706RAR

Manufacturer Part Number

ADM706RAR

Description

IC SUPERVISOR MPU 2.63V WD 8SOIC

Manufacturer

Analog Devices Inc

Type

Simple Reset/Power-On Resetr

Datasheet

1.ADM708TARZ.pdf (16 pages)

Specifications of ADM706RAR

Rohs Status

RoHS non-compliant

Number Of Voltages Monitored

Output

Push-Pull, Totem Pole

Reset

Active Low

Reset Timeout

160 ms Minimum

Voltage - Threshold

2.63V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

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FEATURES

Precision supply voltage monitor

100 μA quiescent current

200 ms reset pulse width

Debounced manual reset input ( MR )

Independent watchdog timer

Reset output

Voltage monitor for power-fail or low battery warning

Guaranteed RESET valid with V

Superior upgrade for MAX706P/R/S/T, MAX708R/S/T

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Critical microprocessor monitoring

Battery-operated systems

Portable instruments

GENERAL DESCRIPTION

The ADM706P/ADM706R/ADM706S/ADM706T and the

ADM708R/ADM708S/ADM708T microprocessor supervisory

circuits are suitable for monitoring either 3 V or 3.3 V power

supplies.

The ADM706P/ADM706R/ADM706S/ADM706T provide

power-supply monitoring circuitry that generate a reset output

during power-up, power-down, and brownout conditions. The

reset output remains operational with V

Independent watchdog monitoring circuitry is also provided.

This is activated if the watchdog input has not been toggled

within 1.6 seconds.

In addition, there is a 1.25 V threshold detector for power-fail

warning, low battery detection, or to monitor an additional power

supply. An active low debounced MR input is also included.

Rev. C

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.

ADM708T)

2.63 V (ADM706P, ADM706R, ADM708R)

2.93 V (ADM706S, ADM708S)

3.08 V (ADM706T, ADM708T)

1.6 second timeout (ADM706x)

Active high (ADM706P)

Active low (ADM706R, ADM706S, ADM706T)

Both active high and active low (ADM708R, ADM708S,

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T

= 1 V

as low as 1 V.

Microprocessor Supervisory Circuits

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The ADM706R, ADM706S, and ADM706T are identical except

for the reset threshold monitor levels, which are 2.63 V, 2.93 V, and

3.08 V, respectively. The ADM706P is identical to the ADM706R in

that the reset threshold is 2.63 V. It differs only in that it has an

active high reset output.

The ADM708R/ADM708S/ADM708T provide similar functio-

nality as the ADM706R/ADM706S/ADM706T and only differ

in that a watchdog timer function is not available. Instead, an

active high reset output (RESET) is provided in addition to the

active low ( RESET ) output.

All parts are available in narrow 8-lead PDIP and 8-lead SOIC

packages.

POWER-FAIL

WATCHDOG

INPUT (WDI)

INPUT (PFI)

* VOLTAGE REFERENCE = 2.63V (P/R), 2.93V (S), 3.08V (T)

* VOLTAGE REFERENCE = 2.63V (R), 2.93V (S), 3.08V (T)

Figure 1. ADM706P/ADM706R/ADM706S/ADM706T

FUNCTIONAL BLOCK DIAGRAMS

1.25V

REF

3 V, Voltage Monitoring

REF

TRANSITION

WATCHDOG

Figure 2. ADM708R/ADM708S/ADM708T

DETECTOR

70μA

ADM706P/ADM706R/

ADM706S/ADM706T

ADM708R/ADM708S/

GENERATOR

WATCHDOG

RESET AND

WATCHDOG

TIMEBASE

RESET

TIMER

ADM708T

www.analog.com

WATCHDOG

OUTPUT (WDO)

POWER-FAIL

OUTPUT (PFO)

RESET,

(P = RESET)

RESET

POWER-FAIL

OUTPUT (PFO)

Related parts for ADM706RAR

ADM706RAR Summary of contents

Page 1

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T FEATURES Precision supply voltage monitor 2.63 V (ADM706P, ADM706R, ADM708R) 2.93 V (ADM706S, ADM708S) 3.08 V (ADM706T, ADM708T) 100 μA quiescent current 200 ms reset pulse width Debounced manual reset input ( MR ) Independent watchdog timer 1.6 ...

Page 2

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagrams ............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configurations and Function ...

Page 3

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T SPECIFICATIONS 5.5 V (ADM706P/ADM70xR unless otherwise noted. Table 1. Parameter POWER SUPPLY V Operating Voltage Range CC Supply Current LOGIC OUTPUT Reset Threshold (V ) RST Reset Threshold Hysteresis RESET PULSE ...

Page 4

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T Parameter MANUAL RESET INPUT MR Pull-Up Current ( Pulse Width MR INPUT THRESHOLD RESET OUTPUT DELAY POWER-FAIL INPUT PFI Input Threshold PFI Input Current ...

Page 5

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T ABSOLUTE MAXIMUM RATINGS T = 25°C unless otherwise noted. A Table 2. Parameter V CC All Other Inputs Input Current V CC GND Digital Output Current Power Dissipation, N-8 (PDIP) θ Thermal Impedance JA Power Dissipation, R-8 (SOIC) ...

Page 6

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS GND 3 PFI 4 Table 3. Pin Function Descriptions ADM706P/ADM706R/ADM706S/ADM706T Pin No. Mnemonic GND 4 PFI 5 PFO 6 WDI 7 (ADM706R/ADM706S/ ...

Page 7

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T Table 4. Pin Function Descriptions ADM708R/ADM708S/ADM708T Pin No. Mnemonic Description 1 MR Manual Reset Input. When taken below 0 RESET/RESET is generated. MR can be driven from TTL, CMOS logic, or from a manual reset switch ...

Page 8

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T TYPICAL PERFORMANCE CHARACTERISTICS V CC RESET 400ms/DIV Figure 6. ADM70xR/ADM70xS/ADM70xT RESET Output Voltage vs. Supply Voltage V CC RESET 400ms/DIV Figure 7. RESET Output Voltage vs. Supply Voltage 1.3V PFI 3V 500ns/DIV Figure 8. PFI Assertion Response Time ...

Page 9

ADM706P/ADM706R/ADM706S/ADM RESET 2µs/DIV Figure 12. ADM70xR/ADM70xS/ADM70xT RESET Response Time 706T, ADM708R/ADM708S/ADM708T T = 25° Rev Page ...

Page 10

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T CIRCUIT INFORMATION WATCHDOG WATCHDOG WATCHDOG TRANSITION INPUT (WDI) TIMER DETECTOR V RESET AND CC WATCHDOG TIMEBASE 70μA MR RESET GENERATOR ADM706P/ADM706R/ REF POWER-FAIL ADM706S/ADM706T INPUT (PFI) 1.25V * VOLTAGE REFERENCE = 2.63V (P/R), 2.93V ...

Page 11

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T POWER-FAIL COMPARATOR The power-fail comparator is an independent comparator that can be used to monitor the input power supply. The inverting input of the comparator is internally connected to a 1.25 V reference voltage. The noninverting input is ...

Page 12

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T APPLICATIONS INFORMATION A typical operating circuit is shown in Figure 20. The unregulated dc input supply is monitored using the PFI input via the resistive divider network. Resistor R1 and Resistor R2 are to be selected so that ...

Page 13

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T OUTLINE DIMENSIONS 0.210 (5.33) MAX 0.150 (3.81) 0.130 (3.30) 0.115 (2.92) 0.022 (0.56) 0.018 (0.46) 0.014 (0.36) CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR ...

Page 14

... ADM706RAR −40°C to +85°C ADM706RAR-REEL −40°C to +85°C ADM706RAR-REEL7 −40°C to +85°C 1 ADM706RARZ −40°C to +85°C 1 ADM706RARZ-REEL −40°C to +85°C 1 ADM706RARZ-REEL7 −40°C to +85°C ADM706SAN −40°C to +85°C 1 ADM706SANZ −40°C to +85°C ADM706SAR − ...

Page 15

ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T NOTES Rev Page ...

Page 16

ADM706P/ADM706R/ADM706S/ADM706T , ADM708R/ADM708S/ADM708T NOTES ©1995–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06435-0-5/08(C) Rev Page ...

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