OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

ADM706TANZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
3 V, Voltage Monitoring
Microprocessor Supervisory Circuits
Data Sheet ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T
Rev. E Document Feedback
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: 781.329.4700 ©2007–2016 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
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 sec timeout (ADM706P, ADM706R, ADM706S,
ADM706T)
Reset output
Active high (ADM706P)
Active low (ADM706R, ADM706S, ADM706T)
Both active high and active low (ADM708R, ADM708S,
ADM708T)
Voltage monitor for power fail or low battery warning
Guaranteed
RESET
valid with V
CC
= 1 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
FUNCTIONAL BLOCK DIAGRAMS
WATCHDOG
TRANSITION
DETECTOR
WATCHDOG
INPUT (WDI)
POWER-FAIL
INPUT (PFI)
POWER-FAIL
OUTPUT (PFO)
WATCHDOG
OUTPUT (WDO)
RESET,
(P = RESET)
*
VOLTAGE REFERENCE = 2.63V (P/R), 2.93V (S), 3.08V (T)
ADM706P/ADM706R/
ADM706S/ADM706T
RESET AND
WATCHDOG
TIMEBASE
RESET
GENERATOR
MR
V
CC
70μA
V
CC
WATCHDOG
TIMER
V
REF
*
1.25V
06435-001
F
igure 1. ADM706P/ADM706R/ADM706S/ADM706T
1.25V
POWER-FAIL
INPUT (PFI)
RESET
* VOLTAGE REFERENCE = 2.63V (R), 2.93V (S), 3.08V (T)
RESET
GENERATOR
MR
V
CC
70μA
V
CC
RESET
06435-002
V
REF
*
POWER-FAIL
OUTPUT (PFO)
ADM708R/ADM708S/
ADM708T
F
igure 2. ADM708R/ADM708S/ADM708T
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
CC
as low as 1 V.
Independent watchdog monitoring circuitry is also provided. This
activates if the watchdog input does not toggle within 1.6 sec.
In addition, there is a 1.25 V threshold detector for a power fail
warning, low battery detection, or to monitor an additional
power supply. An active low debounced
MR
input is also
included.
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 devices are available in narrow 8-lead PDIP and 8-lead
SOIC packages.
ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T Data Sheet
Rev. E | Page 2 of 16
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 Descriptions ........................... 6
Typical Performance Characteristics ............................................. 8
Circuit Information ........................................................................ 10
Power Fail Reset .......................................................................... 10
Manual Reset ............................................................................... 10
Watchdog Timer (ADM706P/ADM706R/
ADM706S/ADM706T) .............................................................. 10
Power Fail Comparator .............................................................. 11
Adding Hysteresis to the Power Fail Comparator ................. 11
Va li d
RESET
Below 1 V V
CC
..................................................... 11
Applications Information .............................................................. 12
Monitoring Additional Supply Levels ...................................... 12
Microprocessors with Bidirectional
RESET
........................... 12
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 14
REVISION HISTORY
1/16—Rev. D to Rev. E
Changes to Table 3 ............................................................................ 6
Changes to Table 4 ............................................................................ 7
Changes to Power Fail Comparator Section, Figure 17,
and Figure 18 ................................................................................... 10
Changes to Figure 20 and Figure 22 ............................................. 12
Changes to Ordering Guide .......................................................... 14
10/14—Rev. C to Rev. D
Changes to Pin 4 Description; Table 3 ........................................... 6
Changes to Pin 4 Description; Table 4 ........................................... 7
Changes to Ordering Guide .......................................................... 14
5/08—Rev. B to Rev. C
Changes to Applications Section ..................................................... 1
Changes to Table 2 ............................................................................. 5
Changes to Table 3 ............................................................................. 6
Changes to Figure 8 ........................................................................... 7
Changes to Figure 16 ......................................................................... 9
2/07—Rev. A to Rev. B
Updated Format .................................................................. Universal
Changes to Table 1 ............................................................................. 3
Updated Outline Dimensions ....................................................... 12
Changes to Ordering Guide .......................................................... 13
Data Sheet ADM706P/ADM706R/ADM706S/ADM706T, ADM708R/ADM708S/ADM708T
Rev. E | Page 3 of 16
SPECIFICATIONS
V
CC
= 2.70 V to 5.5 V (ADM706P/ADM706R/ADM708R), V
CC
= 3.00 V to 5.5 V (ADM70xS), V
CC
= 3.15 V to 5.5 V (ADM70xT), T
A
=
T
MIN
to T
MAX
unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
POWER SUPPLY
V
CC
Operating Voltage Range 1.0 5.5 V
Supply Current 100 200 μA V
CC
< 3.6 V
150 350 μA V
CC
< 5.5 V
LOGIC OUTPUT
Reset Threshold (V
RST
) 2.55 2.63 2.70 V ADM706P/ADM706R/ADM708R
2.85 2.93 3.00 V ADM706S/ADM708S
3.00 3.08 3.15 V ADM706T/ADM708T
Reset Threshold Hysteresis 20 mV
RESET PULSE WIDTH 160 200 280 ms ADM706P/ADM706R/ADM708R, V
CC
= 3 V
160 200 280 ms ADM706S/ADM708S/ADM706T/ADM708T,
V
CC
= 3.3 V
200 ms V
CC
= 5.0 V
RESET
OUTPUT VOLTAGE (ADM706R/ADM708R/
ADM706S/ADM708S/ADM706T/ADM708T)
V
OH
0.8 × V
CC
V V
RST
(max) < V
CC
< 3.6 V, I
SOURCE
= 500 μA
V
OL
0.3 V V
RST
(max) < V
CC
< 3.6 V, I
SINK
= 1.2 mA
V
OH
V
CC
− 1.5 V V 4.5 V < V
CC
< 5.5 V, I
SOURCE
= 800 μA
V
OL
0.4 V 4.5 V < V
CC
< 5.5 V, I
SINK
= 3.2 mA
V
OL
0.3
V
CC
= 1 V, I
SINK
= 100 μA
RESET OUTPUT VOLTAGE (ADM706P)
V
OH
V
CC
− 0.6 V V V
RST
(max) < V
CC
< 3.6 V, I
SOURCE
= 215 μA
V
OL
0.3 V V
RST
(max) < V
CC
< 3.6 V, I
SINK
= 1.2 mA
V
OH
V
CC
− 1.5 V V 4.5 V < V
CC
< 5.5 V, I
SOURCE
= 800 μA
V
OL
0.4 V 4.5 V < V
CC
< 5.5 V, I
SINK
= 3.2 mA
RESET OUTPUT VOLTAGE
(ADM708R/ADM708S/ADM708T)
V
OH
0.8 × V
CC
V V
RST
(max) < V
CC
< 3.6 V, I
SOURCE
= 500 μA
V
OL
0.3 V V
RST
(max) < V
CC
< 3.6 V, I
SINK
= 500 μA
V
OH
V
CC
− 1.5 V V 4.5 V < V
CC
< 5.5 V, I
SOURCE
= 800 μA
V
OL
0.4 V 4.5 V < V
CC
< 5.5 V, I
SINK
= 1.2 mA
WATCHDOG INPUT (ADM706P/ADM706R/
ADM706S/ADM706T)
Watchdog Timeout Period
1.00
1.60
2.25
ADM706P/ADM706R: V
CC
= 3 V;
ADM706S/ADM706T: V
CC
= 3.3 V;
V
IL
= 0.4 V, V
IH
= V
CC
× 0.8 V
WDI Pulse Width 100 ns V
RST
(max) < V
CC
< 3.6 V
50 ns 4.5 V < V
CC
< 5.5 V
WDI Input Threshold
V
IL
0.6 V V
RST
(max) < V
CC
< 3.6 V
V
IH
0.7 × V
CC
V V
RST
(max) < V
CC
< 3.6 V
V
IL
0.8 V V
CC
= 5.0 V
V
IH
3.5 V V
CC
= 5.0 V
WDI Input Current −1.0 +0.02 +1.0 μA WDI = 0 V or V
CC
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

ADM706TANZ

Mfr. #:
Buy ADM706TANZ
Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits RESET GENERATOR I.C.
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet