ADM6384 Analog Devices, ADM6384 Datasheet

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ADM6384

Manufacturer Part Number
ADM6384
Description
Microprocessor Supervisory Circuit in 4-Lead SC70
Manufacturer
Analog Devices
Datasheet

Specifications of ADM6384

# Of Monitored Voltages
1
Backup-battery Switch
No
Manual Reset Capability
Yes
Package
SC70
Reset Threshold Summary
31 Options--1.58 to 5.0V
Reset Output-stage
Active-Low/Push-Pull
Min Reset Timeout (ms)
1,1120,140,20
Watchdog Timer
No

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FEATURES
Precision power supply monitoring
31 reset threshold options: 1.58 V to 5.0 V
Four reset timeouts: 1 ms, 20 ms, 140 ms, and 1120 ms
Manual reset input
Reset output stage
Push-pull active-low
Guaranteed reset output valid to V
Power supply glitch immunity
Specified over the −40°C to +125°C temperature range
4-lead SC70 package
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
GENERAL DESCRIPTION
The ADM6384 is a supervisory circuit that monitors power supply
voltage levels in microprocessor-based systems. A power-on reset
signal is generated when the supply voltage rises to a preset
threshold level. The debounced manual reset input of the
ADM6384 can be used to initiate a reset by means of an external
push button or logic signal.
The part is available in a choice of 31 reset threshold options,
from 1.58 V to 5.0 V. The minimum reset timeout periods are
1 ms, 20 ms, 140 ms, and 1120 ms.
The ADM6384 is available in a 4-lead SC70 package and typi-
cally consumes only 7 µA, making it suitable for use in low
power, portable applications.
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.
CC
= 1 V
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Microprocessor Supervisory
V
MR
CC
FUNCTIONAL BLOCK DIAGRAMS
MR
V
REF
ADM6384
ADM6384
GND
V
Circuit in 4-Lead SC70
CC
©2005–2011 Analog Devices, Inc. All rights reserved.
RESET
DEBOUNCE
GENERATOR
Figure 1.
Figure 2.
100kΩ
RESET
MICROPROCESSOR
RESET
ADM6384
V
GND
CC
www.analog.com
RESET
GND

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ADM6384 Summary of contents

Page 1

... A power-on reset signal is generated when the supply voltage rises to a preset threshold level. The debounced manual reset input of the ADM6384 can be used to initiate a reset by means of an external push button or logic signal. The part is available in a choice of 31 reset threshold options, from 1 ...

Page 2

... ADM6384 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams ............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 REVISION HISTORY 4/11—Rev Rev. C Updated Outline Dimensions ....................................................... 11 Changes to Ordering Guide .......................................................... 11 7/08—Rev Rev. B Changes to Figure 5, Figure 8, and Figure 9.................................. 7 Changes to Figure 10 ...

Page 3

... ADM6384x43x ADM6384x42x ADM6384x41x ADM6384x40x ADM6384x39x ADM6384x38x ADM6384x37x ADM6384x36x ADM6384x35x ADM6384x34x ADM6384x33x ADM6384x32x ADM6384x31x ADM6384x30x ADM6384x29x ADM6384x28x ADM6384x27x ADM6384x26x ADM6384x25x ADM6384x24x ADM6384x23x ADM6384x22x ADM6384x17x ADM6384x16x RESET THRESHOLD TEMPERATURE COEFFICIENT V to Reset Delay CC RESET THRESHOLD HYSTERESIS RESET TIMEOUT PERIOD ADM6384xxD1 ADM6384xxD2 ADM6384xxD3 ADM6384xxD4 ...

Page 4

... ADM6384 Parameter MANUAL RESET INPUT MR Input Threshold Input Pulse Width MR Glitch Rejection MR Pull-Up Resistance MR to Reset Delay RESET OUTPUT VOLTAGE 25°C only. A Min Typ Max Unit 0.3 × 0.8 V 0.7 × 2 µs 100 100 ...

Page 5

... Exposure to absolute −0 maximum rating conditions for extended periods may affect 20 mA device reliability. −40°C to +125°C −65°C to +150°C ESD CAUTION 331°C/W 240°C, 30 sec 260°C, 40 sec Rev Page ADM6384 ...

Page 6

... GND 2 RESET GND ADM6384 TOP VIEW (Not to Scale) 2 RESET 3 MR Figure 3. Pin Configuration Description Ground. Active-Low Reset Output. This is an active-low output that is asserted whenever V below the reset threshold ( features a push-pull output stage. TH Manual Reset Input. This is an active-low input that, when forced low for at least 1 µs, generates a reset ...

Page 7

... Rev Page –40 – TEMPERATURE (°C) Figure 7. Normalized Reset Threshold vs. Temperature (mA) SINK Figure 8. Output Voltage Low vs. I SINK 0.2 0.4 0.6 0.8 I (mA) SOURCE Figure 9. Output Voltage High vs. I SOURCE ADM6384 100 120 6 7 1.0 ...

Page 8

... ADM6384 160 RESET OCCURS ABOVE CURVE 140 120 100 V = 4.63V 2.93V 100 OVERDRIVE V (mV) OD Figure 10. Maximum V Transient Duration vs. Reset Threshold Overdrive CC 340 320 300 280 V = 3.3V CC 260 240 220 200 180 V CC 160 140 120 100 1000 – ...

Page 9

... V CC RESET MANUAL RESET INPUT The ADM6384 features a manual reset input ( MR ) that, when driven low, asserts the reset output. When MR transitions from low to high, reset remains asserted for the duration of the reset active timeout period before deasserting. The MR input has a 52 kΩ internal pull-up so that the input is always high when down ...

Page 10

... APPLICATIONS INFORMATION NEGATIVE-GOING V TRANSIENTS CC To avoid unnecessary resets caused by fast power supply tran- sients, the ADM6384 is equipped with glitch rejection circuitry. The typical performance characteristic shown in Figure 10 plots V transient duration vs. the transient magnitude. The curves CC show combinations of transient magnitude and duration for which a reset is not generated for 4 ...

Page 11

... PACKAGE OUTLINE CORRESPONDS IN FULL TO EIAJ SC82 EXCEPT FOR WIDTH OF PIN 2 AS SHOWN. Figure 14. 4-Lead Thin Shrink Small Outline Transistor Package [SC70] (KS-4) Dimensions shown in millimeters ADM6384YKS -RL7 (16 TO 50) Figure 15. Ordering Code Structure Reset Temperature Timeout (ms) Range 140 −40°C to +125°C 140 − ...

Page 12

... ADM6384 NOTES ©2005–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05305-0-4/11(C) Rev Page ...

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