CATALYST CAT812J

CAT811, CAT812
4-Pin Microprocessor Power Supply Supervisors with Manual Reset
FEATURES
DESCRIPTION
■ Precision monitoring of
The CAT811 and CAT812 are microprocessor
supervisory circuits that monitor power supplies. The
CAT811 and CAT812 are direct replacements for the
MAX811 and MAX812 in applications operating over the
industrial temperature range; both have a manual reset
input.
+5.0 V (± 5%, ± 10%, ± 20%),
+3.3 V (± 5%, ± 10%),
+3.0 V (± 10%) and
+2.5 V (± 5%) power supplies
■ Manual reset input
These devices generate a reset signal, which is asserted
while the power supply voltage is below a preset threshold
level and for at least 140 ms after the power supply level
has risen above that level. The underlying floating gate
technology, AE2(TM) used by Catalyst Semiconductor,
makes it possible to offer any custom reset threshold
value. Seven industry standard threshold levels are
offered to support +5.0 V, +3.3 V, +3.0 V and +2.5 V
systems.
■ Offered in two output configurations:
- CAT811: Active LOW reset
- CAT812: Active HIGH reset
■ Direct replacements for the MAX811 and
MAX812 in applications operating over the
industrial temperature range
■ Reset valid down to VCC = 1.0 V
■ 6 µA power supply current
■ Power supply transient immunity
The CAT811 features a RESET push-pull output (active
LOW) and the CAT812 features a RESET push-pull
output (active HIGH).
■ Available in SOT-143 packages with Sn or
NiPdAu Green Lead finishes.
■ Industrial temperature range: -40°°C to +85°°C
Fast transients on the power supply are ignored and the
output is guaranteed to be in the correct state at Vcc
levels as low as 1.0 V.
APPLICATIONS
■ Computers
The CAT811/812 are fully specified over the industrial
temperature range (-40°C to 85°C) and are available in
a compact 4-pin SOT143 package.
■ Servers
■ Laptops
■ Cable modems
■ Wireless communications
■ Embedded control systems
■ White goods
■ Power meters
■ Intelligent instruments
■ PDAs and handheld equipment
PIN CONFIGURATION
THRESHOLD SUFFIX SELECTOR
Nominal Threshold
Voltage
4.63V
4.38V
4.00V
3.08V
2.93V
2.63V
2.32V
Threshold Suffix
Designation
L
M
J
T
S
R
Z
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
GND
1
4
VCC
3
MR
CAT811
CAT812
RESET
1
2
Doc. No. 3005, Rev. R
CAT811, CAT812
ORDERING INFORMATION
Prefix
Device #
CAT
Suffix
S
811
Company ID
Device Type
811: Push-Pull / Active Low Output
812: Push-Pull / Active High Output
The device shown in the examples (CAT811STBIGT10) has an Active Low, Push-Pull output; a trip level
of 2.85V to 3.00V and is provided in the Green SOT-23
package with a NiPdAu lead finish on tape and reel
with 10,000 units.
GT10
TBI
Trip Level
L: 4.63V
M: 4.38V
J: 4.00V
T: 3.08V
S: 2.93V
R: 2.63V
Z: 2.32V
Package Type
EUS: 4 pin SOT-143
TBI: 4 pin SOT-143 Green
Parts per Reel
T3: 3K units
T10: 10K units
GT3: 3K units (NiPdAu Lead Finish)*
GT10: 10K units (NiPdAu Lead Finish)*
* NiPdAu is a Lead Finish Option on the Green
Packages only. Unless indicated with the “G” green
packages are shipped with a Sn Matte Lead Finish.
TOP MARKING
Parts and
Threshold
CAT811L
CAT811M
CAT811J
CAT811T
CAT811S
CAT811R
CAT811Z
CAT812L
CAT812M
CAT812J
CAT812T
CAT812S
CAT812R
CAT812Z
SOT-143 (1)
AMYM
ANYM
AZYM
APYM
AQYM
ARYM
AYYM
ASYM
ATYM
AUYM
AVYM
AWYM
AXYM
CIYM
SOT-143
Green Sn
Matte Lead
Finish (1) (2)
DHYM
DJYM
CKYM
DLYM
DMYM
DNYM
CPYM
DRYM
DTYM
DUYM
DVYM
DWYM
DXYM
CYYM
SOT-143
Green
NiPdAu Lead
Finish (1) (2)
ERYM
ESYM
Notes
1) The “YM” in the SOT-143 package marking indicates the Year
and Month of production.
2) All NiPdAu devices will be marked to indicate product type and
package. Threshold and full part numbers will be provided on box
and reel labels as well as all Shipping documents.
PIN DESCRIPTIONS
Pin Number
Name
Description
1
GND
Ground
2
—
RESET
Active LOW reset. RESET is asserted if VCC falls below the reset threshold
and remains low for at least 140ms after VCC rises above the reset threshold.
—
2
RESET
Active HIGH reset. RESET is asserted if VCC falls below the reset
threshold and remains high for at least 140ms after VCC rises above
the reset threshold.
3
3
MR
Manual Reset Input. A logic LOW on MR asserts RESET. RESET remains
active as long as MR is LOW and for 140ms after MR returns HIGH. The
active low input has an internal 20kΩ pull-up resistor. The input should be left
open if not used.
4
4
VCC
Power supply voltage that is monitored.
CAT811
CAT812
1
Doc. No. 3005, Rev. R
2
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT811, CAT812
Operating Temperature Range ........... -40°C to +85°C
ABSOLUTE MAXIMUM RATINGS*
Storage Temperature Range ............ -65°C to +105°C
Any pin with respect to ground .......... -0.3 V to +6.0 V
Lead Soldering Temperature (10 sec) .............. 300°C
Input Current, VCC ............................................. 20 mA
Output Current, RESET, RESET ...................... 20 mA
*COMMENT
Rate of Rise, VCC ............................................................. 100 V/µs
Stresses above those listed under “Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions
outside of those listed in the operational sections of this specification is not
implied. Exposure to any absolute maximum rating for extended periods
may affect device performance and reliability.
Continuous Power Dissipation
Derate 4mW/°C above 70°C (SOT143) ........ 320 mW
ELECTRICAL CHARACTERISTICS
VCC = Full range, TA = -40°C to +85°C unless otherwise noted. Typical values at TA = +25°C and VCC = 5 V for the
L/M/J versions, VCC = 3.3 V for the T/S versions, VCC = 3 V for the R version and VCC = 2.5 V for the Z version.
Parameter
Symbol
VCC Range
Supply Current
ICC
Conditions
Typ
Max
TA = 0°C to +70°C
1.0
5.5
TA = -40°C to +85°C
1.2
5.5
TA = -40˚C to +85˚C
L Threshold
M Threshold
J Threshold
Reset
T Threshold
Threshold
Voltage
Min
VTH
S Threshold
R Threshold
Z Threshold
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
VCC < 5.5 V, J/L/M
8
20
VCC < 3.6 V, R/S/T/Z
6
15
4.63
4.70
TA = +25°C
4.56
TA = -40°C to +85°C
4.50
TA = +25°C
4.31
TA = -40°C to +85°C
4.25
TA = +25°C
3.93
TA = -40°C to +85°C
3.89
TA = +25°C
3.04
TA = -40°C to +85°C
3.00
TA = +25°C
2.89
TA = -40°C to +85°C
2.85
TA = +25°C
2.59
TA = -40°C to +85°C
2.55
TA = +25°C
2.28
TA = -40°C to +85°C
2.25
3
Units
V
µA
4.75
4.38
4.45
4.50
4.00
4.06
4.10
3.08
3.11
3.15
2.93
V
2.96
3.00
2.63
2.66
2.70
2.32
2.35
2.38
Doc No. 3005, Rev. R
CAT811, CAT812
ELECTRICAL CHARACTERISTICS (continued)
VCC = Full range, TA = -40˚C to +85˚C unless otherwise noted. Typical values at TA = +25˚C and VCC = 5 V for
L/M/J versions, VCC = 3.3 V for T/S versions, VCC = 3 V for R version and VCC = 2.5 V for Z version.
Parameter
Symbol
Conditions
Min
Reset Threshold Tempco
VCC to Reset Delay (Note 2)
VCC = VTH to (VTH - 100 mV)
Reset Active Timeout Period
TA = -40˚C to +85˚C
140
Typ(1)
ppm/˚C
20
µs
240
VCC = VTH min, ISINK = 3.2 mA
0.4
CAT811J/L/M
VCC > 1.0 V, ISINK = 50 µA
VCC = VTH max, ISOURCE = 500 µA
RESET Output Voltage High
(Push-pull, active LOW,
CAT811)
VOH
VCC = VTH max, ISOURCE = 800 µA
V
0.8 VCC
V
VCC - 1.5
VCC > VTH max, ISINK = 1.2 mA
0.3
CAT812R/S/T/Z
VOL
ms
0.3
CAT811R/S/T/Z
CAT811J/L/M
RESET Output Voltage Low
(Push-pull, active HIGH,
CAT812)
400
0.3
CAT811R/S/T/Z
VOL
Units
30
VCC = VTH min, ISINK = 1.2 mA
RESET Output Voltage Low
(Push-pull, active LOW,
CAT811)
Max
V
VCC > VTH max, ISINK = 3.2 mA
0.4
CAT812J/L/M
RESET Output Voltage High
(Push-pull active HIGH,
CAT812)
MR Minimum Pulse Width
VOH
1.8 V < VCC ≤ VTH min, ISOURCE = 150 µA
tMR
MR Glitch Immunity
0.8 VCC
V
10
µs
Note 3
100
ns
tMD
Note 2
0.5
µs
VIH
VCC > VTH (MAX), CAT811/812L/M/J
MR to RESET Propagation
Delay
MR Input Threshold
2.3 V
VIL
0.8
V
VIH
VCC > VIH (MAX), CAT811/812R/S/T/Z
0.7VCC
VIL
0.25VCC
MR Pull-up Resistance
10
20
30
kΩ
Note 1: Production testing done at TA = +25˚C; limits over temperature guaranteed by design only.
Note 2: RESET output for the CAT811; RESET output for the CAT812
Note 3: Glitches of 100 ns or less typically will not generate a reset pulse.
Doc. No. 3005, Rev. R
4
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT811, CAT812
TYPICAL OPERATING CHARACTERISTICS
VCC = Full range, TA = -40˚C to +85˚C unless otherwise noted. Typical values at TA = +25˚C and VCC = 5 V for
L/M/J versions, VCC=3.3 V for T/S versions, VCC = 3 V for R version and VCC = 2.5 V for Z version.
SUPPLY CURRENT VS. TEMPERATURE
(NO LOAD, CAT8xxR/S/T/Z)
260
12
240
SUPPLY CURRENT (µA)
POWER-UP RESET TIMEOUT (mS)
POWER-UP RESET TIMEOUT
VS. TEMPERATURE
VCC=5V
220
200
VCC=2.5V
180
VCC=5.5V
10
8
VCC=3.6V
6
4
2
0
160
-50
0
50
100
-50
150
0
TEMPERATURE (˚C)
150
NORMALIZED RESET THRESHOLD
VS. TEMPERATURE
1.0002
14
NORMALIZED THRESHOLD
POWER-DOWN RESET DELAY (µS)
100
TEMPERATURE (˚C)
POWER-DOWN RESET DELAY VS. TEMPERATURE
(CAT8xxR/S/T/Z)
12
10
8
6
4
2
0
-50
50
1
0.9998
0.9996
0.9994
0.9992
0.999
0.9988
0
50
100
150
0
TEMPERATURE (˚C)
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
20
40
60
80
100
120
TEMPERATURE (˚C)
5
Doc No. 3005, Rev. R
CAT811, CAT812
DETAILED DESCRIPTIONS
RESET TIMING
The reset signal is asserted LOW for the CAT811 and
HIGH for the CAT812 when the power supply voltage
falls below the threshold trip voltage and remains asserted
for at least 140ms after the power supply voltage has
risen above the threshold.
Threshold
Voltage
Power 5V
Supply
Voltage 0V
RESET
Reset Timeout Period
140ms
minimum
5V
CAT811
0V
5V
RESET
CAT812
0V
Figure 1. Reset Timing Diagram
VCC TRANSIENT RESPONSE
The CAT811/812 protect µPs against brownout failure.
Short duration transients of 4µsec or less and 100 mV
amplitude typically do not cause a false RESET.
As the amplitude of the transient goes further below the
threshold (increasing VTH - VCC), the maximum pulse
duration decreases. In this test, the VCC starts from an
initial voltage of 0.5V above the threshold and drops
below it by the amplitude of the overdrive voltage (VTH
- VCC).
Figure 2 shows the maximum pulse duration of negativegoing VCC transients that do not cause a reset condition.
TRANSIENT DURATION [µs)
30
TAMB = 25°C
25
20
15
CAT8xxZ
10
5
CAT8xxM
0
1
10
100
1000
RESET OVERDRIVE VTH - VCC [mV]
Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
Doc. No. 3005, Rev. R
6
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
CAT811, CAT812
VALID RESET WITH VCC UNDER 1.0 V
To ensure that the CAT811 RESET pin is in a known
state when VCC is under 1.0 V, a 100 kΩ pull-down
resistor between RESET pin and GND is recommended;
the value is not critical. For the CAT812, a pull-up
resistor from RESET pin to VCC is needed.
Power
Supply
Power
Supply
VCC
VCC
100kΩ
CAT812
CAT811
MR
MR
RESET
RESET
100kΩ
GND
GND
Figure 3. RESET Valid with VCC Under 1.0 V
Figure 4. RESET Valid with VCC Under 1.1 V
BI-DIRECTIONAL RESET PIN INTERFACING
The CAT811/812 can interface with µP/µC bi-directional
reset pins by connecting a 4.7 kΩ resistor in series with
the CAT811/812 reset output and the µP/µC bi-directional
reset pin.
BUF
Power
Supply
Buffered
RESET
VCC
CAT811
µP
4.7kΩ
MR
RESET
RESET
INPUT
GND
(For example: 68HC11)
GND
Bi-directional
I/O Pin
Figure 5. Bi-directional Reset Pin Interfacing
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
7
Doc No. 3005, Rev. R
CAT811, CAT812
OTHER SUPERVISORY PRODUCTS
Function
CAT1161/3
CAT1162
CAT809
CAT810
CAT811
8-pin
DIP and SOIC
8-pin
DIP and SOIC
3-pin
SOT23 and
SC70
3-pin
SOT23 and
SC70
4-pin
SOT143
CAT812
With 16k Bit Serial EEPROM Memory
Watchdog Timer
Manual Reset Input
Active Low Reset
Active High Reset
Dual Polarity Reset Outputs
Package
4-pin
SOT143
PACKAGE INFORMATION
Plastic SOT143 (4-Pin)
2.05 MAX
1.78 MIN
2.64 MAX
2.10 MIN
0.51 MAX
0.37 MIN
0.20
0.89 MAX
0.76 MIN
1.40 MAX
1.20 MIN
3.04 MAX
2.80 MIN
0.18 MAX
0.085 MIN
0.94 MAX
0.88 MIN
1.12 MAX
0.89 MIN
0.20
GAUGE PLANE
0.10 MAX
0.013 MIN
Doc. No. 3005, Rev. R
0.54 REF
8
0.41 MAX
0.21 MIN
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
REVISION HISTORY
Date
10/22/03
12/22/2003
Rev.
L
M
3/22/04
3/25/2004
N
O
3/25/2004
9/28/2004
12/28/2005
P
Q
R
Reason
Updated Ordering Information
Updated Features
Replaced power-up reset timeout vs. temperature graph
with updated one
Replaced VCC Transient Response graph with updated
one
General data sheet updates
Updated Electrical Characteristics (Reset Active
Timeout Period Max)
Corrected Pin Configure diagram
Minor changes
Updated Features
Updated Ordering Information
Updated Yop Marking
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Publication #:
Revison:
Issue date:
3005
R
12/28/05