4-Lead SC70. ADM8616 Datasheet

ADM8616 SC70. Datasheet pdf. Equivalent

Part ADM8616
Description Low-Voltage Manual Reset & Watchdog Supervisory Circuits in 4-Lead SC70
Feature Preliminary Technical Data FEATURES Precision 1.8V to 5V Power Supply Monitoring 9 Reset Threshold O.
Manufacture Analog Devices
Datasheet
Download ADM8616 Datasheet



ADM8616
Preliminary Technical Data
Low-Voltage Manual Reset & Watchdog
Supervisory Circuits in 4-Lead SC70
ADM8611/ADM8616/ADM8617/ADM8618
FEATURES
Precision 1.8V to 5V Power Supply Monitoring
9 Reset Threshold Options:
1.58V to 4.63V
140ms (Min) Reset Timeout
Manual Reset Input (ADM8611)
Watchdog Timer (ADM8616–ADM8618)
Reset Output Stages
Push-Pull Active-Low
Open-Drain Active-Low
Push-Pull Active-High
Low Power Consumption (3µA)
Guaranteed Reset Output valid to VCC=1V
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
FUNCTIONAL BLOCK DIAGRAMS
ADM8616
VCC
VREF
RESET
GENERATOR
WATCHDOG
DETECTOR
GND
WDI
Figure 1.
VCC
RESET
GENERAL DESCRIPTION
The ADM8611/ADM8616/ADM8617/ADM8618 are
supervisory circuits which 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 ADM8611’s debounced
manual reset input can be used to initiate a reset by means of an
external push-button or logic signal. The ADM8616–ADM8618
have an on-chip watchdog timer which can reset the
microprocessor if it fails to strobe within a preset timeout
period.
Each part is available in a choice of the following 9 reset
threshold options: 1.58V, 1.67V, 2.19V, 2.32V, 2.63V, 2.93V,
3.08V, 4.38V and 4.63V. The reset timeout periods are 20ms
(min) and 140ms (min) for the ADM8611 and ADM8616–
ADM8618, respectively. The watchdog timeout period is 1.6s
(typ). The parts differ in terms of reset output configuration, as
indicated in table 1.
The ADM8611/ADM8616/ADM8617/ADM8618 are available
in 4-lead SC70 packages and typically consume only 3µA,
making them suitable for use in low power portable
applications.
Part No.
ADM8611
ADM8616
ADM8617
ADM8618
Table 1. Selection Table
Manual Reset
Yes
-
-
-
Watchdog
-
Yes
Yes
Yes
Output Stage
RESET
RESET
Push-Pull
Push-Pull
Open-Drain
Push-Pull
Rev. PrB
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 companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.



ADM8616
ADM8611/ADM8616/ADM8617/ADM8618
Preliminary Technical Data
ADM8611/ADM8616/ADM8617/ADM8618—SPECIFICATIONS
Table 2. VCC=Full Operating Range, TA=TMIN to TMAX, unless otherwise noted
Parameter
SUPPLY
VCC Operating Voltage Range
Supply Current
RESET THRESHOLD VOLTAGE
ADM861_L
Min Typ Max Units
1 5.5 V
10 20 µA
5 12 µA
4.50 4.63 4.75
V
Test Conditions/Comments
VCC=5.5V
VCC=3.6V
TA=-40°C to +85°C
ADM861_M
4.25 4.38 4.50
V TA=-40°C to +85°C
ADM861_T
3.00 3.08 3.15
V TA=-40°C to +85°C
ADM861_S
2.85 2.93 3.00
V TA=-40°C to +85°C
ADM861_R
2.55 2.63 2.70
V TA=-40°C to +85°C
ADM861_Z
2.25 2.32 2.38
V TA=-40°C to +85°C
ADM861_Y
2.12 2.19 2.25
V TA=-40°C to +85°C
ADM861_W
1.62 1.67 1.71
V TA=-40°C to +85°C
ADM861_V
RESET THRESHOLD TEMPERATURE COEFFICIENT
RESET THRESHOLD HYSTERESIS
RESET TIMEOUT PERIOD
VCC TO RESET DELAY
PUSH-PULL OUTPUT (ADM8611, ADM8616, ADM8618)
RESET Output Voltage
1.52
20
140
1.58
40
3
30
200
40
RESET Rise Time
RESET Output Voltage
OPEN-DRAIN OUTPUT (ADM8617)
RESET Output Voltage
0.8x VCC
VCC-1.5
5
0.8x VCC
0.8x VCC
VCC-1.5
Open-Drain Reset Output Leakage Current
1.62 V TA=-40°C to +85°C
ppm/°C
mV
40 ms ADM8611
280 ms ADM8616–ADM8618
µs VCC falling at 1mV/µs
0.3 V VCC>=1.0V, ISINK=50µA
0.3 V VCC>=1.2V, ISINK=100µA
0.3 V VCC>=2.7V, ISINK=1.2mA
0.4 V VCC>=4.5V, ISINK=3.2mA
V VCC>=2.7V, ISOURCE=500µA
V VCC>=4.5V, I SOURCE=800µA
25 ns From 10% to 90% VCC, CL=5pF,
VCC =3.3V
0.3 V VCC>=2.7V, ISINK=1.2mA
0.4 V VCC>=4.5V, ISINK=3.2mA
V VCC>=1.8V, ISOURCE=150µA
V VCC>=2.7V, ISOURCE=500µA
VCC>=4.5V, I SOURCE=800µA
0.3 V VCC>=1.0V, ISINK=50µA
0.3 V VCC>=1.2V, ISINK=100µA
0.3 V VCC>=2.7V, ISINK=1.2mA
0.4 V VCC>=4.5V, ISINK=3.2mA
1 µA
Rev. PrB | Page 2 of 7





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