CAT705, CAT706, CAT813
mP
Supervisory Circuits
Description
The CAT705, CAT706, and CAT813 provide 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 allows the system power
supply to stabilize.
The devices have a watchdog input which can be used to monitor a
system signal and causes WDO to go low if the signal fails to change
state prior to a timeout condition.
The supervisory circuits provide a MR input which initiates a reset if
pulled low. The CAT705 and CAT706 provide an active low RESET
output. The CAT813 provides an active high RESET output.
There is a secondary supply monitor (PFI) included for power−fail
warning.
Features
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SOIC−8
V SUFFIX
CASE 751BD
MSOP−8
Z SUFFIX
CASE 846AD
PIN CONFIGURATIONS AND
MARKING DIAGRAMS
SOIC−8 (V) (Top View)
1
WDO
MR
L4A
CAT705VI
YMALND
V
CC
GND
PFI
RESET *
WDI
PFO
•
•
•
•
•
•
•
Reset Guaranteed Valid for 1.0 V V
CC
6
mA
Supply Current
200 ms Reset Pulse Width
Watchdog Timer Function 1.6 s Timeout
Accurate Brownout Detection Reset in 3.0, 3.6, and 5.0 Volt Systems
Secondary Low Supply Monitoring on PFI Input
Pin and Function Compatible with the
MAX705/MAX706/MAX813L Products
•
Operating Range from
−40°C
to +85°C
•
SOIC 8−lead and MSOP 8−lead Packages
•
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
L
= Assembly Location Code
4
= Lead Finish NiPdAu
A
= Product Revision: Fixed as “A”
CATxxxV = Specific Device Code
=
(CAT705V = CAT705 SOIC)
=
(CAT706V = CAT706 SOIC)
=
(CAT813V = CAT813 SOIC)
I
= Temperature Range (I = Industrial)
Y
= Production Year (Last Digit)
M
= Production Month (1−9, O, N, D)
ALND = Last Four Assembly Lot Number Digits
MSOP−8 (Z) (Top View)
1
RESET *
WDO
MR
V
CC
ABRx
WDI
PFO
PFI
GND
ABRx
YMZ
•
Microprocessor and Microcontroller Based Systems
•
Instrument and Control Systems
•
Portable Equipment
Y
M
Z
= Specific Device Code
=
(ABRT = CAT705 MSOP)
=
(ABRT = CAT706 MSOP)
=
(ABRS = CAT813 MSOP)
= Production Year (Last Digit)
= Production Month (1−9, O, N, D)
= Product Revision
(* RESET for CAT813)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
©
Semiconductor Components Industries, LLC, 2012
April, 2012
−
Rev. 7
1
Publication Order Number:
CAT705/D
CAT705, CAT706, CAT813
V
CC
R
MR
= 60 kW
MR
V
CC
+
−
V
RST
52kW
WATCHDOG
TRANSITION
DETECTION
+
−
1.25 V
PFO
TIMER
RESET
CONTROLLER
RESET
(RESET for CAT813)
WDI
PFI
WATCHDOG
TIMER
WDO
Figure 1. Functional Block Diagram
Device
CAT705
CAT706
CAT813
RESET
@ 4.65 V
x
RESET
MR
x
x
WDI
x
x
x
WDO
x
x
x
PFI
@ 1.25 V
@ 1.25 V
@ 1.25 V
@ 4.65 V
x
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2
CAT705, CAT706, CAT813
Table 1. PIN FUNCTION DESCRIPTION
Pin Name
MR
V
CC
GND
PFI
PFO
WDI
RESET
RESET
WDO
Manual Reset Input
Power Supply
Ground
Power Fail voltage monitor Input
Power Fail Output
Watchdog Timer Input
CMOS Push−Pull Active Low Reset Output (CAT705 & CAT706)
CMOS Push−Pull Active High Reset Output (CAT813)
Watchdog Timer Output
Function
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameters
Supply Voltage
All other pins
Output Current RESET, RESET, WDO
Continuous Power Dissipations (T
A
= +70°C)
SOIC 8−lead (derate 5.9 mW/°C above +70°C)
MSOP 8−lead (derate 4.1 mW/°C above +70°C)
Storage Temperature
Lead Soldering (10 seconds max)
ESD Rating: Human Body Model
ESD Rating: Machine Model
Ratings
6.5
−0.3
to (V
CC
+ 0.3)
20
471
330
−65
to 150
+300
2000
200
Units
V
V
mA
mW
°C
°C
V
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 3. RECOMMENDED OPERATING CONDITIONS
Parameter
V
CC
(T
A
=
−40°C
to +85°C)
All Other Pins
Ambient Temperature
Rating
1.0 to 5.5
−0.1
to (V
CC
+ 0.1)
−40
to +85
Unit
V
V
°C
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3
CAT705, CAT706, CAT813
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Typical values at T
A
= 25°C and V
CC
= 5 V for CAT705, CAT706 and
CAT813 versions. V
CC
= 3.3 V for the CAT706 T/S versions; V
CC
= 3.0 V for the CAT706 R version.) (Note 1)
Parameter
Supply Current
Symbol
I
CC
V
RST
Test Conditions
CAT705, CAT706, CAT813
CAT706 (R/S/T Versions)
Reset Threshold
CAT705 & CAT813 at
−40°C
≤
T
A
≤
+85°C
CAT706 at
−40°C
≤
T
A
≤
+85°C
CAT706T at
−40°C
≤
T
A
≤
+85°C
CAT706S at
−40°C
≤
T
A
≤
+85°C
CAT706R at
−40°C
≤
T
A
≤
+85°C
Reset Threshold Tempco (Note 1)
Reset Threshold Hysteresis
(Note 1)
V
CC
to Reset Delay (Note 2)
Reset Active Timeout Period
RESET Output High Voltage
t
RD
t
RP
V
OH
CAT705 & CAT706, 4.5 V < V
CC
<
5.5 V, I
SOURCE
=
−800
mA
CAT705 & CAT706, V
RST (max)
<
V
CC
< 3.6 V, I
SOURCE
=
−500
mA
RESET Output Low Voltage
V
OL
CAT705 & CAT706, 4.5 V < V
CC
<
5.5 V, I
SINK
= 3.2 mA
CAT705 & CAT706, V
RST (max)
<
V
CC
< 3.6 V, I
SINK
= 1.2 mA
CAT705 &CAT706, V
CC
= 1 V,
I
SINK
= 100
mA
RESET Output High Voltage
V
OH
CAT813, V
CC
= V
RST max
,
I
SOURCE
=
−120
mA
CAT813, V
CC
= V
RST max
,
I
SOURCE
=
−30
mA
RESET Output Low Voltage
V
OL
CAT813, V
CC
= V
RST min
,
I
SINK
= 3.2 mA
CAT813, V
CC
= 1.2 V,
I
SINK
= 100
mA
WATCHDOG INPUT
Watchdog Timeout Period
WDI Pulse Width
WDI Input Voltage (Note 3)
t
WD
t
WP
V
IL
V
IH
WDI Input Current (Note 3)
WDI = V
CC
, Time Average
WDI = 0 V, Time Average
1.
2.
3.
4.
5.
−150
0.7 x V
CC
50
−50
150
mA
V
IL
= 0.4 V, V
IH
= 0.8 x V
CC
1.00
50
0.3 x V
CC
1.6
2.25
s
ns
V
V
CC
−
1.5 V
0.8 x V
CC
0.4
0.3
V
CAT705 & CAT813
CAT706
V
CC
= V
TH
to (V
TH
– 100 mV)
140
V
CC
−
1.5 V
0.8 x V
CC
0.4
0.3
0.3
V
V
4.50
4.25
3.00
2.85
2.55
Min
Typ
6
4
4.65
4.40
3.08
2.93
2.63
40
10
5
20
200
400
Max
17
12
4.75
4.50
3.15
3.00
2.70
Units
mA
mA
V
V
V
V
V
ppm/°C
mV
mV
ms
ms
V
Limits are guaranteed by design and not production tested.
The RESET short−circuit current is the maximum pull−up current when reset is driven low by a bidirectional output.
WDI is internally serviced within the watchdog period if WDI is left open.
RESET for CAT705 & CAT706 & RESET for CAT813.
Not 100% tested but guaranteed by design.
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4
CAT705, CAT706, CAT813
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Typical values at T
A
= 25°C and V
CC
= 5 V for CAT705, CAT706 and
CAT813 versions. V
CC
= 3.3 V for the CAT706 T/S versions; V
CC
= 3.0 V for the CAT706 R version.) (Note 1)
Parameter
WATCHDOG INPUT
WDO Output Voltage
V
W_OH
V
RST (max)
< V
CC
< 3.6 V;
I
SOURCE
=
−500
mA
4.5 V < V
CC
< 5.5 V,
I
SOURCE
=
−800
mA
V
W_OL
V
RST (max)
< V
CC
< 3.6 V,
I
SINK
= +500
mA
4.5 V < V
CC
< 5.5 V,
I
SINK
= 1.2 mA
WDO to WDI setup time (Note 5)
MANUAL RESET INPUT
MR Input Voltage
V
IL
V
IH
MR Pull−up Current
MR Pulse Width
MR Pull−up Resistance
MR low to Reset Delay (Note 4)
POWER−FAIL INPUT
PFI Input Threshold
PFI Input Current
PFO Output Voltage
V
P_OH
V
RST(max)
< V
CC
< 3.6 V,
I
SOURCE
=
−500
mA
4.5 V < V
CC
< 5.5 V,
I
SOURCE
=
−800
mA
V
P_OL
V
RST (max)
< V
CC
< 3.6 V,
I
SINK
= +1.2 mA
4.5 V < V
CC
< 5.5 V, I
SINK
= 3.2 mA
1.
2.
3.
4.
5.
Limits are guaranteed by design and not production tested.
The RESET short−circuit current is the maximum pull−up current when reset is driven low by a bidirectional output.
WDI is internally serviced within the watchdog period if WDI is left open.
RESET for CAT705 & CAT706 & RESET for CAT813.
Not 100% tested but guaranteed by design.
V
CC
= 5 V
1.2
−25
0.8 x V
CC
V
CC
−
1.5
0.4
0.3
0.4
1.25
0.01
1.3
25
V
nA
V
t
PB
R
MR
t
PDLY
MR = 0 V
0.7 x V
CC
40
1
40
60
80
5
70
140
mA
ms
kW
ms
0.3 x V
CC
V
t
WDSU
250
0.1
0.8 x V
CC
V
CC
– 1.5
V
CC
– 0.25
0.3
0.4
ns
V
Symbol
Test Conditions
Min
Typ
Max
Units
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