ADM8617 Analog Devices, ADM8617 Datasheet

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ADM8617

Manufacturer Part Number
ADM8617
Description
Low Voltage Supervisory Circuit with Watchdog in 4-Lead SC70 (Active-low with an Open-Drain Output)
Manufacturer
Analog Devices
Datasheet

Specifications of ADM8617

Batt-backup-flg
No
Manual Reset Capability
No
Package
SC70
Power Fail Indicator
No
Reset Threshold Summary
9 Options--1.58 to 4.63V
Reset Output-stage
Active-Low/Open-Drain
Min Reset Timeout (ms)
1,1120,140,20
Typ Watchdog Timeout (ms)
102,1600,6.3
Watchdog Timer
Yes

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADM8617RCYAKSZ-RL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
ADM8617SAYAKSZ-RL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
Precision 1.8 V to 5 V power supply monitoring
9 RESET threshold options
4 RESET timeout options
3 watchdog timeout options
RESET output stages
Low power consumption (5 μA)
Guaranteed reset output valid to V
Power supply glitch immunity
Specified over −40°C to +85°C temperature range
4-lead SC70 package
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
GENERAL DESCRIPTION
The ADM8616/ADM8617 are supervisory circuits that monitor
power supply voltage levels and code execution integrity in
microprocessor-based systems. A power-on reset signal is
generated when the supply voltage rises to a preset threshold
level. The ADM8616/ADM8617 have an on-chip watchdog
timer that can reset the microprocessor if it fails to strobe
within a preset timeout period.
Each part is available in the following nine reset threshold
options: 1.58 V, 1.67 V, 2.19 V, 2.32 V, 2.63 V, 2.93 V, 3.08 V,
4.38 V, and 4.63 V. There are four reset timeout options: 1 ms,
20 ms, 140 ms, and 1120 ms. There are also three possible
watchdog timeouts available: 6.3 ms, 102 ms, and 1.6 sec.
Rev. B
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.
1.58 V to 4.63 V
1 ms, 20 ms, 140 ms, 1120 ms
6.3 ms, 102 ms, 1.6 sec
Push-pull active-low (ADM8616)
Open-drain active-low (ADM8617)
CC
= 1 V
Low Voltage Supervisory Circuits
with Watchdog in 4-Lead SC70
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The parts differ in terms of reset output configuration. The
ADM8616 is active-low with a push-pull output, while the
ADM8617 is active-low with an open-drain output.
The ADM8616/ADM8617 are available in 4-lead SC70 packages
and typically consume only 5 μA, making them suitable for use
in low power, portable applications.
V
CC
ADM8616
V
REF
FUNCTIONAL BLOCK DIAGRAM
GND
ADM8616/ADM8617
©2007 Analog Devices, Inc. All rights reserved.
GENERATOR
WATCHDOG
DETECTOR
RESET
WDI
Figure 1.
V
www.analog.com
CC
RESET

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ADM8617 Summary of contents

Page 1

... The parts differ in terms of reset output configuration. The ADM8616 is active-low with a push-pull output, while the ADM8617 is active-low with an open-drain output. The ADM8616/ADM8617 are available in 4-lead SC70 packages and typically consume only 5 μA, making them suitable for use in low power, portable applications. ...

Page 2

... ADM8616/ADM8617 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 Typical Performance Characteristics ............................................. 6 REVISION HISTORY 1/07—Rev Rev. B Changes to Functional Block Diagram.......................................... 1 11/06—Rev Rev. A Changes to Ordering Guide .......................................................... 10 6/05— ...

Page 3

... − 1 4.3 6.3 9.3 71 102 153 1.12 1.6 2.4 50 0.3 × 0.7 × 120 160 −20 −15 Rev Page ADM8616/ADM8617 Unit Test Conditions/Comments V μ 5 μ 3 ppm/° μs V falling at 1 mV/μ ≥ ...

Page 4

... ADM8616/ADM8617 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 2. Parameter V CC RESET Output Current (RESET) Operating Temperature Range Storage Temperature Range θ Thermal Impedance, SC70 JA Soldering Temperature Sn/Pb Pb-Free Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...

Page 5

... RESET Active-Low RESET Output. Asserted whenever V Push-Pull Output Stage for ADM8616. Open-Drain Output Stage for ADM8617. 3 WDI Watchdog Input. Generates a RESET if the logic level on the pin remains low or high for the duration of the watchdog timeout. The timer is cleared if a logic transition occurs on this pin reset is generated. Leave floating to disable the watchdog timer ...

Page 6

... ADM8616/ADM8617 TYPICAL PERFORMANCE CHARACTERISTICS 10.0 9.5 9.0 8 8.0 7.5 7.0 6 3.3V 6.0 CC 5.5 5.0 4 1.5V CC 4.0 3.5 –40 – TEMPERATURE (°C) Figure 3. Supply Current vs. Temperature 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 –40 – TEMPERATURE (°C) Figure 4. Normalized RESET Timeout Period vs. Temperature 100 –40 – TEMPERATURE (°C) to RESET Output Delay vs ...

Page 7

... I (mA) SINK Figure 9. Voltage Output Low vs. I SINK 2. 2.9V CC 2.90 2.88 2.86 2.84 2. Rev Page ADM8616/ADM8617 V = 2.9V CC 0.2 0.4 0 (mA) SOURCE Figure 10. Voltage Output High vs. I SOURCE 1.0 ...

Page 8

... RESET pulse that restarts the microprocessor in a known state. RESET OUTPUT The ADM8616 features an active-low, push-pull RESET output, while the ADM8617 features an active-low, open-drain RESET output. The RESET signal is guaranteed to be logic low and logic high, respectively, for V down ...

Page 9

... NEGATIVE-GOING V TRANSIENTS CC To avoid unnecessary resets caused by fast power supply transients, the ADM8616/ADM8617 are equipped with glitch rejection circuitry. The typical performance characteristic in Figure 8 plots V transient duration vs. transient magnitude. CC The curve shows combinations of transient magnitude and duration for which a RESET is not generated for 4 ...

Page 10

... ADM8616RCYAKSZ-RL7 2.63 ADM8616ZCYAKSZ-RL7 2 2.32 2 ADM8616YCYAKSZ-RL7 2.19 2 ADM8616WCYAKSZ-RL7 1.67 2 ADM8616VCYAKSZ-RL7 1.58 2 ADM8617SAYAKSZ-RL7 2.93 2 ADM8617RCYAKSZ-RL7 2. ordering nonstandard models, complete the ordering code shown in Figure 17 by inserting reset threshold, reset timeout, and watchdog timeout suffixes. Contact Sales for availability of nonstandard models Pb-free part. 2.20 1.80 1.35 1. 2.40 1. PIN 1 0.50 BSC ...

Page 11

... NOTES Rev Page ADM8616/ADM8617 ...

Page 12

... ADM8616/ADM8617 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04795-0-1/07(B) Rev Page ...

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