CAT825YTDI-GT3 ON Semiconductor, CAT825YTDI-GT3 Datasheet

Supervisory Circuits SUP ACT LOW ACT HI MR

CAT825YTDI-GT3

Manufacturer Part Number
CAT825YTDI-GT3
Description
Supervisory Circuits SUP ACT LOW ACT HI MR
Manufacturer
ON Semiconductor
Datasheet

Specifications of CAT825YTDI-GT3

Chip Enable Signals
No
Minimum Operating Temperature
- 40 C
Number Of Voltages Monitored
1
Overvoltage Threshold
2.19 V
Manual Reset
Resettable
Watchdog
No
Battery Backup Switching
No
Power-up Reset Delay (typ)
20 us
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.2 V
Supply Current (typ)
3 uA
Maximum Power Dissipation
571 mW
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 85 C
Package / Case
TSOT-23-5
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
System Supervisory Voltage Reset with
Watchdog and Manual Reset
FEATURES
n Automatically restarts microprocessor after
n Monitors pushbutton for external override
n Accurate under voltage system monitoring
n Brownout detection system reset for use with
n Pin and function compatible with the
n Operating Range from -40°C to +85°C
n Available in TSOT-23 5-lead and SC-70 packages
APPLICATIONS
n Microprocessor and Microcontroller based
n Intelligent Instruments
n Control Systems
n Critical µP Monitors
n Portable Equipment
PIN CONFIGURATION
© 2010 SCILLC. All rights reserved.
Characteristics subject to change without notice
RESET
For Ordering Information details, see page 13 & 14.
GND
MR
Power failure
3.0, 3.3, and 5.0 volt systems
MAX823/24/25 products
systems
1
2
3
CAT823
RESET
RESET
GND
TSOT-23 5-Lead
5
4
SC-70 5-Lead
1
2
3
V
WDI
CC
CAT825
RESET
RESET
GND
5
4
1
2
3
V
MR
CC
CAT824
5
4
V
WDI
CC
1
DESCRIPTION
The CAT823, CAT824, and CAT825 provide basic
reset and monitoring functions for the electronic
systems. Each device monitors the system voltage
and maintains a reset output until that voltage reaches
the device’s specified trip value and then maintains
the reset output active condition until the device’s
internal timer, after a minimum timer of 140ms; to
allow the systems power supply to stabilize.
The CAT823 and CAT824 also have a watchdog input
which can be used to monitor a system signal and
cause a reset to be issued if the signal fails to change
state prior to a timeout condition.
The CAT823 and CAT825 also provide a manual
reset input which can be used to initiate reset if pulled
low. This input can be directly attached to a push-
button or a processor signal.
PIN FUNCTIONS
Pin Name
¯¯¯¯¯¯
RESET
RESET
GND
WDI
¯¯¯
V
MR
CC
CAT823, CAT824, CAT825
Function
CMOS Push-Pull Active Low Reset
Output
Ground
Manual Reset input – Pulled high
Internally by a 52kΩ resistor designed
to be driven low by a mechanical
pushbutton, open drain output or CMOS
output.
CMOS Push-Pull Active High Reset
Output
Watchdog Timer Input – Designed to be
driven by a processor output or can be
disabled by tri-stating or leaving open.
Power Supply
Doc. No. MD-3027, Rev. D

Related parts for CAT825YTDI-GT3

CAT825YTDI-GT3 Summary of contents

Page 1

System Supervisory Voltage Reset with Watchdog and Manual Reset FEATURES n Automatically restarts microprocessor after Power failure n Monitors pushbutton for external override n Accurate under voltage system monitoring n Brownout detection system reset for use with 3.0, 3.3, and ...

Page 2

CAT823, CAT824, CAT825 BLOCK DIAGRAM LEVEL SENSE & WDI* TIMER TOLERANCE CC BIAS V CC VOLTAGE REFERENCE 52kΩ MR* * Functions Available by Device Device ¯¯¯¯¯¯ RESET ¯¯¯ RESET MR CAT823 x x CAT824 x x CAT825 ...

Page 3

ABSOLUTE MAXIMUM RATINGS Parameters Supply Voltage All other pins Input Current ¯¯¯¯¯¯ Output Current RESET, RESET Continuous Power Dissipations (T SC-70 5-lead (derate 3.1mW/ºC above +70ºC) TSOT-23 5-lead (derate 7.1mW/ºC above +70ºC) Storage Temperature Operating Ambient Temperature Lead ...

Page 4

CAT823, CAT824, CAT825 ELECTRICAL OPERATING CHARACTERISTICS DC Characteristics 3.0V to 5.5V for L/M versions -40ºC ≤ T ≤ +85ºC unless otherwise noted. Typical Values 3.3V for the T/S versions ...

Page 5

ELECTRICAL OPERATING CHARACTERISTICS (continued) DC Characteristics 3.0V to 5.5V for L/M versions -40ºC ≤ T ≤ +85ºC unless otherwise noted. Typical Values 3.3V for the T/S versions Symbol ...

Page 6

CAT823, CAT824, CAT825 TYPICAL ELECTRICAL OPERATING CHARACTERISTICS V Supply Current vs. Temperature -40 - TEMPERATURE (ºC) Doc. No. MD-3027 Rev. D 1.06 1.04 1.02 1.00 0.98 ...

Page 7

FUNCTIONAL DESCRIPTION PROCESSOR RESET The CAT823-825 detect supply conditions that are below the specified voltage trip value (V ) and provide a reset output to maintain RST correct system operation. On power-up, RESET RESET if available) are kept active for ...

Page 8

CAT823, CAT824, CAT825 WATCHDOG TIMER The CAT823 and CAT824 provide a Watchdog input (WDI). The watchdog timer function forces RESET (and RESET in the CAT824) signals active when the WDI input does not have a transition from low-to-high or high-to-low ...

Page 9

Figure 5. Timing Diagram – Strobe Input INVALID STROBE WDI RESET Figure 6. Timing Diagram – Power Down RESET RESET (CAT824 & CAT825) Figure 7. Timing Diagram – Power © 2010 SCILLC. All rights ...

Page 10

CAT823, CAT824, CAT825 APPLICATION NOTES µP’s with Bidirectional Reset Pins ¯¯¯¯¯¯ output can be pulled low by processors The RESET like the 68HC11 allowing for a system reset issued by the processor. The maximum pullup current that can be sourced ...

Page 11

PACKAGE OUTLINE DRAWINGS (1)(2) TSOT-23 5-Lead (TD TOP VIEW b SIDE VIEW Notes: (1) All dimensions in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-193. © 2010 SCILLC. All rights reserved. Characteristics subject to change without ...

Page 12

CAT823, CAT824, CAT825 (1)(2) SC-70 5-Lead (SD TOP VIEW θ1 b θ1 SIDE VIEW Notes: (1) All dimensions in millimeters. Angles in degrees. (2) Complies with JEDEC MO-203. Doc. No. MD-3027 Rev. D SYMBOL ...

Page 13

EXAMPLE OF ORDERING INFORMATION Prefix Device # CAT 823 Product Optional Number Company ID 823 824 825 TOP MARKING INFORMATION (FOR ALL THRESHOLDS) Device # Package CAT823 TSOT-23 CAT824 TSOT-23 CAT825 TSOT-23 CAT823 SC-70 CAT824 SC-70 CAT825 SC-70 Notes: (1) ...

Page 14

... CAT824RSDI-GT3 2.63V CAT824ZSDI-GT3 2.32V CAT824YSDI-GT3 2.19V CAT825LTDI-GT3 4.63V CAT825MTDI-GT3 4.38V CAT825TTDI-GT3 3.08V CAT825STDI-GT3 2.93V CAT825RTDI-GT3 2.63V CAT825ZTDI-GT3 2.32V CAT825YTDI-GT3 2.19V CAT825LSDI-GT3 4.63V CAT825MSDI-GT3 4.38V CAT825TSDI-GT3 3.08V CAT825SDI-GT3 2.93V CAT825RSDI-GT3 2.63V CAT825ZSDI-GT3 2.32V CAT825YSDI-GT3 2.19V Doc. No. MD-3027, Rev. D Inputs Outputs ¯¯¯ ...

Page 15

... Update Package Outline Drawings 23-May-08 B Update Top Mark Information 5-Nov-08 C Change logo and fine print to ON Semiconductor 01-July-10 D Update Ordering Information Table ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...

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