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CAT824TTDI-GT3

P1-P3P4-P6P7-P9P10-P12
© Semiconductor Components Industries, LLC, 2012
May, 2012 − Rev. 8
1 Publication Order Number:
CAT823/D
CAT823, CAT824, CAT825
System Supervisory Voltage
Reset with Watchdog and
Manual Reset
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 140 ms; 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.
Features
• Automatically Restarts Microprocessor after Power Failure
• Monitors Pushbutton for External Override
• Accurate Under Voltage System Monitoring
• Brownout Detection System Reset for use with 3.0, 3.3, and 5.0 Volt
Systems
• Pin and Function Compatible with the MAX823/24/25 Products
• Operating Range from −40°C to +85°C
• Available in TSOT−23 5−lead and SC−70 Packages
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Microprocessor and Microcontroller Based Systems
• Intelligent Instruments
• Control Systems
• Critical mP Monitors
• Portable Equipment
PIN FUNCTIONS
Pin Name Function
RESET CMOS Push−Pull Active Low Reset Output
GND Ground
MR
Manual Reset input – Pulled high Internally by a 52 kW res-
istor designed to be driven low by a mechanical pushbutton,
open drain output or CMOS output.
RESET CMOS Push−Pull Active High Reset Output
WDI Watchdog Timer Input – Designed to be driven by a processor
output or can be disabled by tri−stating or leaving open.
V
CC
Power Supply
http://onsemi.com
PIN CONNECTIONS
(Top Views)
SC−70
SD SUFFIX
CASE 419AC
TSOT−23
TD SUFFIX
CASE 419AE
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
ORDERING INFORMATION
V
CC
WDI
RESET
GND
MR
CAT823
1
V
CC
WDI
RESET
GND
RESET
CAT824
1
V
CC
MR
RESET
GND
RESET
CAT825
1
XXX = Specific Device Code
M = Date Code
G = Pb−Free Package*
(*Note: Microdot may be in either location)
MARKING DIAGRAM
XXXMG
G
CAT823, CAT824, CAT825
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2
Figure 1. Block Diagram
RESET*
WDI*
+
–
DIGITAL
DELAY
LEVEL SENSE
&
DEBOUNCE
LEVEL SENSE
&
TIMER
TOLERANCE
BIAS
VOLTAGE
REFERENCE
* Functions Available by Device
TIMEOUT
COMPARATOR
V
CC
V
CC
RESET
V
CC
V
CC
MR*
V
CC
52 kW
Device RESET RESET MR WDI
CAT823 x x x
CAT824 x x x
CAT825 x x x
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameters Ratings Units
Supply Voltage 6 V
All other pins −0.3 to (V
CC
+ 0.3) V
Input Current, V
CC
20 mA
Output Current RESET, RESET 20 mA
Continuous Power Dissipations (T
A
= +70°C)
SC−70 5−lead (derate 3.1 mW/°C above +70°C)
TSOT−23 5−lead (derate 7.1 mW/°C above +70°C)
247
571
mW
Storage Temperature −65 to 150 °C
Operating Ambient Temperature −40 to +85 °C
Lead Soldering (10 seconds max) +300 °C
ESD Rating: Low Voltage Pins
Human Body Model
Machine Model
2000
200
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameter Range Units
V
CC
(T
A
= 0°C to +70°C) 1.0 to 5.5 V
V
CC
(T
A
= −40°C to +85°C) 1.2 to 5.5 V
All Other Pins −0.1 to (V
CC
+ 0.1) V
Ambient Temperature −40 to +85 °C
CAT823, CAT824, CAT825
http://onsemi.com
3
Table 3. ELECTRICAL OPERATING CHARACTERISTICS (DC Characteristics: V
CC
= 3.0 V to 5.5 V for L/M versions;
V
CC
= 2.0 V to 3.6 V for the R/S/T/U/Y/Z version, −40°C ≤ T
A
≤ +85°C unless otherwise noted. Typical Values at T
A
= 25°C and V
CC
= 5 V
for L/M versions; V
CC
= 3.3 V for the T/S versions; V
CC
= 3.0 V for the R version; and V
CC
= 2.5 V for the U/Y/Z versions.) (Note 1)
Symbol
Parameter Conditions Min Typ Max Units
I
CC
Supply Current
CAT823 (L/M Versions)
CAT824 (L/M Versions)
6 17 mA
CAT823 (R/S/T/Y/Z Versions)
CAT824 (R/S/T/U/Y/Z Versions)
4 12
CAT825 (L/M Versions) 3 8
CAT825 (R/S/T/Y/Z Versions) 2 6
V
RST
Reset Threshold
CAT82_L at −40°C ≤ T
A
≤ +85°C 4.50 4.63 4.75
V
CAT82_M at −40°C ≤ T
A
≤ +85°C 4.25 4.38 4.50
CAT82_T at −40°C ≤ T
A
≤ +85°C 3.00 3.08 3.15
CAT82_S at −40°C ≤ T
A
≤ +85°C 2.85 2.93 3.00
CAT82_R at −40°C ≤ T
A
≤ +85°C 2.55 2.63 2.70
CAT82_Z at −40°C ≤ T
A
≤ +85°C 2.25 2.32 2.38
CAT82_Y at −40°C ≤ T
A
≤ +85°C 2.13 2.19 2.25
CAT824U at −40°C ≤ T
A
≤ +85°C 1.95 2.00 2.05
Reset Threshold Tempco 40 ppm/°C
Reset Threshold Hysteresis
CAT82_L/M 10
mV
CAT82_R/S/T/Y/Z, CAT824U 5
t
RD
V
CC
to Reset Delay (Note 2)
V
CC
= V
TH
to (V
TH
− 100 mV)
20
ms
t
RP
Reset Active Timeout Period 140 200 400 ms
V
OH
RESET Output High Voltage
CAT82_L/M, V
CC
= V
RST
max
,
I
SOURCE
= −120 mA
V
CC
− 1.5 V
V
CAT82_T/S/R/Z/Y, CAT824U,
V
CC
= V
RST
max
, I
SOURCE
= −30 mA
0.8 x V
CC
V
OL
RESET Output Low Voltage
CAT82_L/M, V
CC
= V
RST
min
,
I
SINK
= 3.2 mA
0.4
V
CAT82_T/S/R/Z/Y, CAT824U,
V
CC
= V
RST
min
, I
SINK
= 1.2 mA
0.3
T
A
= 0°C to +70°C, V
CC
= 1 V,
V
CC
falling, I
SINK
= 50 mA
0.3
T
A
= T
MIN
to T
MAX
, V
CC
= 1.2 V,
V
CC
falling, I
SINK
= 100 mA
0.3
I
SOURCE
RESET Output
Short−Circuit Current
CAT82_L/M, Reset = 0 V, V
CC
= 5.5 V 1.5
mA
CAT82_L/M, Reset = 0 V, V
CC
= 3.6 V 0.8
V
OH
Reset Output Voltage
V
CC
> 1.8 V, I
SOURCE
= −150 mA
0.8 x V
CC
V
V
OL
CAT824L/M & CAT825L/M,
V
CC
= V
RST
max
, I
SINK
= 3.2 mA
0.4
CAT824R/S/T/U/Y/Z &
CAT825R/S/T/Y/Z,
V
CC
= V
RST
max
, I
SINK
= 1.2 mA
0.3
1. Over−temperature limits are guaranteed by design and not production tested.
2. The RESET short−circuit current is the maximum pull−up current when reset is driven low by a bidirectional output.
3. WDI is internally serviced within the watchdog period if WDI is left open.
4. The WDI input current is specified as an average input current when the WDI input is driven high or low. The WDI input if connected to
a three−stated output device can be disabled in the tristate mode as long as the leakage current is less than 10 mA and a maximum capacitance
of less than 200 pF. To clock the WDI input in the active mode the drive device must be able to source or sink at least 200 mA when active.
P1-P3P4-P6P7-P9P10-P12

CAT824TTDI-GT3

Mfr. #:
Buy CAT824TTDI-GT3
Manufacturer:
ON Semiconductor
Description:
IC SUPERVISOR MPU 3.08V TSOT23-5
Lifecycle:
New from this manufacturer.
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