MICROCHIP TCM812MERC

M
TCM811/TCM812
4-Pin Microcontroller Reset Monitors
Features
General Description
• Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V,
5.0V Nominal Supplies
• Manual Reset Input
• 140 msec Minimum RESET Output Duration
• RESET Output Valid to V DD = 1.0V (TCM811)
• Low 6 µA (typ.) Supply Current
• VDD Transient Immunity
• Small 4-Pin SOT-143 Package
• No External Components
• Replacement for MAX811/812 and Offers a Lower
Threshold Voltage Option
• Push-Pull RESET Output
• Temperature Range:
- Commercial (C) -40°C to +85°C
The TCM811 and TCM812 are cost effective system
supervisory circuits designed to monitor VDD in digital
systems and provide a reset signal to the host controller when necessary. A manual reset input is provided
to override the reset monitor and is suitable for use as
a push-button reset. No external components are
required.
Applications
•
•
•
•
Computers
Embedded Systems
Battery Powered Equipment
Critical Microcontroller Power Supply Monitoring
VDD
4
3
MR
RESET
GND 1
PIC
Microcontroller
TCM811
PUSH
BUTTON
Package Types:
2
GND
 2002 Microchip Technology Inc.
RESET
INPUT
(Active Low)
4
VDD
3
MR
TCM811
or
TCM812
VDD
VDD
The TCM811/TCM812 are optimized to reject fast transient glitches on the VDD line. A low supply current of
6 µA (VDD = 3.3V) makes these devices ideal for battery
powered applications.
SOT-143
Typical Application Circuit
0.1µF
The reset output is driven active within 20 µsec (5 µsec
for F version) of VDD falling through the reset voltage
threshold. RESET is maintained active for a minimum
of 140 msec after VDD rises above the reset threshold.
The TCM812 has an active high RESET output while
the TCM811 has an active low RESET output. The output of the TCM811 is valid down to VDD = 1V. Both
devices are available in a 4-Pin SOT-143 package,
specified with a temperature range of -40°C to +85°C.
TCM811 RESET
TCM812 (RESET)
2
GND
DS21615B-page 1
TCM811/TCM812
1.0
ELECTRICAL
CHARACTERISTICS
PIN FUNCTION TABLE
NAME
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage (VDD to GND).........................................+6.0V
GND
Ground
RESET (TCM811)
RESET push-pull output remains low
while VDD is below the reset voltage
threshold, and for at least 140 msec
(min.) after VDD rises above reset
threshold.
RESET (TCM812)
RESET push-pull output remains
high while VDD is below the reset
voltage threshold, and for at least
140 msec (min.) after VDD rises
above reset threshold.
MR
Manual Reset input generates a
reset when MR is below VIL.
VDD
Supply Voltage
RESET, RESET.................................... - 0.3V to (VDD + 0.3V)
Input Current, VDD .........................................................20 mA
Output Current, RESET, RESET...................................20 mA
Operating Temperature Range...................... – 40°C to +85°C
Storage Temperature Range....................... – 65°C to +150°C
Maximum Junction Temperature, TS .............................. 150°C
*Notice: Stresses beyond those listed under “Absolute Maximun Ratings” may cause permanenet damage to the device. These are stress
ratings only, and functional operation of the device at these or any other
conditions beyond those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximun rating conditions for extended periods may affect device reliability.
FUNCTION
ELECTRICAL CHARACTERISTICS
VDD = 5V for L/M versions, V DD = 3.3V for T/S versions, VDD = 3V for R version, VDD = 2.0V for F version.
TA = –40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. (Note 1)
Parameters
Sym
Min
Typ
Max
Units
VDD Range
VDD
1.0
1.1
—
—
5.5
5.5
V
TCM811
TCM812
Supply Current
ICC
—
—
6
4.75
15
10
µA
TCM81_L/M, VDD = 5.5V, IOUT = 0
TCM81_R/S/T/F, VDD = 3.6V, IOUT
=0
Reset Threshold
VTH
4.54
4.50
4.63
—
4.72
4.75
V
TCM81_L:
4.30
4.25
4.38
—
4.46
4.50
TCM81_M: TA = +25°C
TA = –40°C to +85°C
3.03
3.00
3.08
—
3.14
3.15
TCM81_T:
2.88
2.85
2.93
—
2.98
3.00
TCM81_S: TA = +25°C
TA = –40°C to +85°C
2.58
2.55
2.63
—
2.68
2.70
TCM81_R: TA = +25°C
TA = –40°C to +85°C
1.71
1.70
1.75
—
1.79
1.80
TCM81_F: TA = +25°C
TA = –40°C to +85°C
Reset Threshold Tempco
—
30
—
ppm/°C
VDD to Reset Delay
—
—
20
5
—
—
µsec
VDD = V TH to VTH –125 mV; L, M,
R, S, T, F
VDD = VTH(MAX)
Reset Active Timeout Period
tRP
140
280
560
msec
MR Minimum Pulse Width
tMR
10
—
—
µsec
—
100
—
nsec
—
0.5
—
µsec
MR Glitch Immunity
MR to Reset Propagation
Delay
tMD
Conditions
TA = +25°C
TA = –40°C to +85°C
TA = +25°C
TA = –40°C to +85°C
Note 1: Production testing done at TA = +25°C and +85°C, over temperature limits are tested with periodic QA tests
in production.
DS21615B-page 2
 2002 Microchip Technology Inc.
TCM811/TCM812
VDD = 5V for L/M versions, V DD = 3.3V for T/S versions, VDD = 3V for R version, VDD = 2.0V for F version.
TA = –40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. (Note 1)
Parameters
MR Input Threshold
Sym
Min
Typ
Max
Units
VIH
VIL
2.3
—
—
—
—
0.8
V
VDD > VTH(MAX),
TCM81_L/M
VIH
VIL
0.7 VDD
—
—
—
—
0.25 VDD
V
VDD > V TH(MAX),
TCM81_R/S/T/F
10
20
40
kΩ
—
—
0.3
V
TCM811R/S/T only;
ISINK = 1.2 mA, VDD = VTH(MIN)
—
—
0.4
V
—
—
0.3
V
TCM811F only;
ISINK = 500 µA, VDD = VTH(MIN)
TCM811L/M only;
ISINK = 3.2 mA, VDD = VTH(MIN)
ISINK = 3.2 mA, VDD = VTH(MIN)
0.8 VDD
—
—
V
TCM811R/S/T/F only;
ISOURCE = 500 µA, VDD > VTH(MAX)
VDD - 1.5
—
—
V
TCM811L/M only;
ISOURCE = 800 µA, VDD > VTH(MAX)
—
—
0.2
V
TCM812F only, ISINK = 500 µA,
VDD = V TH(MAX)
—
—
0.3
TCM812R/S/T only, ISINK = 1.2 mA,
VDD = V TH(MAX)
—
—
0.4
TCM812L/M only, ISINK = 1.2 mA,
VDD = V TH(MAX)
0.8 VDD
—
—
MR Pull-up Resistance
RESET Output Voltage Low
(TCM811)
RESET Output Voltage High
(TCM811)
RESET Output Voltage Low
(TCM812)
RESET Output Voltage High
(TCM812)
VOL
VOH
VOL
VOH
V
Conditions
ISOURCE = 150 µA, VDD ≤ VTH(MIN)
Note 1: Production testing done at TA = +25°C and +85°C, over temperature limits are tested with periodic QA tests
in production.
 2002 Microchip Technology Inc.
DS21615B-page 3
TCM811/TCM812
2.0
APPLICATIONS INFORMATION
The TCM811/TCM812 provides accurate VDD monitoring and reset timing during power-up, power-down, and
brownout/sag conditions. These devices also reject
negative-going transients (glitches) on the power supply line. Figure 2-1 shows the maximum transient duration vs. maximum negative excursion (overdrive) for
glitch rejection. Any combination of duration and overdrive that is under the curve will not generate a reset
signal. Combinations above the curve are detected as
a brownout or power-down. Transient immunity can be
improved by adding a 0.1 µF capacitor in close proximity to the VDD pin of the TCM811/812.
(100 kΩ will be suitable for most applications). Similarly, a pull-up resistor to VDD is required for the
TCM812 to ensure a valid high RESET for VDD below
1.1V.
VDD
4
VDD
0.1µF
TCM811
2
RESET
R1
100 kΩ
VDD
GND
1
VTH
Overdrive = VD D
FIGURE 2-2: The addition of R1 at the RESET
output of the TCM811 ensures that the RESET output
is valid to VDD = 0V.
MAXIMUM TRANSIENT DURATION (µsec)
Duration
400
2.2
TA = +25˚C
320
Some microcontrollers have bi-directional reset pins.
Depending on the current drive capability of the controller pin, an indeterminate logic level may result if there
is a logic conflict. This can be avoided by adding a
4.7 kΩ resistor in series with the output of the TCM811/
TCM812 (Figure 2-3). If there are other components in
the system which require a reset signal, they should be
buffered so as not to load the reset line. If the other
components are required to follow the reset I/O of the
microcontroller, the buffer should be connected as
shown with the solid line.
240
160
TCM81xL/M
80
TCM81xR/S/T
0
1
10
1000
100
RESET COMPARATOR OVERDRIVE,
VTH - VDD (mV)
FIGURE 2-1: Maximum Transient Duration
Overdrive for Glitch Rejection at 25°C.
2.1
Controllers and Processors With
Bidirectional I/O Pins
Buffered RESET
To Other System
Components
vs.
BUFFER
RESET Signal Integrity During PowerDown
The TCM811 RESET push-pull output is valid to VDD =
1.0V. Below this voltage the output becomes an "open
circuit" and does not sink current. This means CMOS
logic inputs to the microcontroller will be floating at an
undetermined voltage. Most digital systems are completely shutdown well above this voltage. However, in
situations where RESET must be maintained valid to
VDD = 0V, a pull-down resistor must be connected from
RESET to ground to discharge stray capacitances and
hold the output low (Figure 2-2). This resistor value,
though not critical, should be chosen such that it does
not appreciably load RESET under normal operation
DS21615B-page 4
VDD
4
0.1µF
Micro
controller
TCM811
4.7 kΩ
RESET
GND
1
2
RESET
GND
FIGURE 2-3: Interfacing the TCM811 to a Bidirectional Reset I/O.
 2002 Microchip Technology Inc.
TCM811/TCM812
3.0
TYPICAL PERFORMANCE CHARACTERISTICS
Note:
The graphs provided following this note are a statistical summary based on a limited number of samples
and are provided for informational purposes only. The performance characteristics listed herein are not
tested or guaranteed. In some graphs, the data presented may be outside the specified operating range
(e.g., outside specified power supply range) and therefore outside the warranted range.
8
14
SUPPLY CURRENT (µA)
12
SUPPLY CURRENT (µA)
TCM81xR/S/T/F
No Load
10
VDD = 5V
8
VDD = 3V
6
4
VDD = 1V
TCM81xL/M
No Load
6
VDD = 5V
4
VDD = 3V
VDD = 1V
2
2
0
–40
–20
0
40
20
60
0
–40
85
–20
0
TEMPERATURE (˚C)
FIGURE 3-1:
Supply Current vs. Temperature.
FIGURE 3-4:
TCM81xF
40
30
VOD = 20 mV
20
10
VOD = 100 mV
VOD = 200 mV
–20
0
40
20
60
POWER-DOWN RESET DELAY (µsec)
POWER-DOWN RESET DELAY (µsec)
85
Supply Current vs. Temperature.
85
VOD = 20 mV
VOD = 100 mV
40
VOD = 200 mV
30
20
10
TCM81xL/M
0
–40
–20
TEMPERATURE (˚C)
FIGURE 3-2:
Temperature.
Power-Down
Reset
Delay
vs.
FIGURE 3-5:
Temperature.
POWER-DOWN RESET DELAY (µsec)
TCM81xL/M
240
TCM81xR/S/T/F
235
230
–20
0
20
40
Power-Up
Reset
 2002 Microchip Technology Inc.
60
85
Power-Down
Reset
60
85
Delay
vs.
TCM81x/R/S/T
40
30
20
VOD = 200 mV
VOD = 100 mV
VOD = 20 mV
10
0
–40
TEMPERATURE (˚C)
FIGURE 3-3:
Temperature.
40
20
50
245
225
–40
0
TEMPERATURE (˚C)
250
POWER-UP RESET TIMEOUT (msec)
60
50
50
0
–40
40
20
TEMPERATURE (˚C)
–20
0
20
40
60
85
TEMPERATURE (˚C)
Timeout
vs.
FIGURE 3-6:
Temperature.
Power-Down
Reset
Delay
vs.
DS21615B-page 5
TCM811/TCM812
1.0030
NORMALIZED THRESHOLD (V)
1.0020
1.0010
1.0000
0.9990
0.9980
0.9970
0.9960
0.9950
0.9940
–40
FIGURE 3-7:
Temperature.
–15
35
10
TEMPERATURE (˚C)
Normalized
DS21615B-page 6
Reset
60
Threshold
65
vs.
 2002 Microchip Technology Inc.
TCM811/TCM812
4.0
PACKAGING INFORMATION
4.1
Package Marking Information
4-Pin SOT-143
1
Part Number
Legend:
Note:
1
2
3
4
2
3
4
(V)
Code
TCM811LERC
4.63
U1
TCM811MERC
4.38
U2
TCM811TERC
3.08
U3
TCM811SERC
2.93
U4
TCM811RERC
2.63
U5
TCM811FERC
1.75
U7
TCM812LERC
4.63
V1
TCM812MERC
4.38
V2
TCM812TERC
3.08
V3
TCM812SERC
2.93
V4
TCM812RERC
2.63
V5
TCM812FERC
1.75
V7
Part Number + temperature range and voltage (two-digit code)
Part Number + temperature range and voltage (two-digit code)
Year and two-month period code
Lot ID number
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line thus limiting the number of available characters
for customer specific information.
 2002 Microchip Technology Inc.
DS21615B-page 7
TCM811/TCM812
4.2
Package Dimensions
Component Taping Orientation for 4-Pin SOT-143 Devices
User Direction of Feed
Device
Marking
W
PIN 1
P
Standard Reel Component Orientation
for TR Suffix Device
(Mark Right Side Up)
Carrier Tape, Number of Components Per Reel and Reel Size:
Package
4-Pin SOT-143
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
8 mm
4 mm
3000
7 in.
.079 (2.00)
.071 (1.80)
.055 (1.40)
.047 (1.20)
.098 (2.50)
.083 (2.10)
.080 (2.03)
.070 (1.78)
.120 (3.05)
.105 (2.67)
.040 (1.02)
.031 (0.79)
.006 (0.15)
.004 (0.09)
8 MAX.
.004 (0.10)
.001 (0.02)
.021 (0.54)
.015 (0.38)
.010 (0.25)
.005 (0.13)
.037 (0.94)
.030 (0.77)
DS21615B-page 8
 2002 Microchip Technology Inc.
TCM811/TCM812
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The file transfer site is available by using an FTP service to connect to:
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The web site and file transfer site provide a variety of
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technical information and more
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 2002 Microchip Technology Inc.
DS21615B-page 9
TCM811/TCM812
READER RESPONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation
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Literature Number: DS21615B
Questions:
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DS21615B-page 10
 2002 Microchip Technology Inc.
TCM811/TCM812
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO.
X
X
XXXX
Device
VDD
Temperature
Range
Package
Reset
Threshold
Device:
TCM811: Supervisor Circuit with active-low RESET output
TCM812: Supervisor Circuit with active-high RESET output
VDD Reset Threshold:
L
M
T
S
R
F
=
=
=
=
=
=
Temperature Range:
E
= -40°C to +85°C
Package:
RCTR = SOT-143, 4-pin (Tape and Reel)
4.63V
4.38V
3.08V
2.93V
2.63V
1.75V
Examples:
a)
TCM811LERCTR: SOT-143, Microcontroller
4.63V Reset Monitor, -40°C to +85°C, Tape and
Reel.
b)
TCM811MERCTR: SOT-143, Microcontroller
4.38V Reset Monitor, -40°C to +85°C, Tape and
Reel.
a)
TCM812FERCTR: SOT-143, Microcontroller
1.75V Reset Monitor, -40°C to +85°C, Tape
and Reel.
b)
TCM812SERCTR: SOT-143, Microcontroller
2.93V Reset Monitor, -40°C to +125°C, Tape
and Reel.
Sales and Support
Data Sheets
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 2002 Microchip Technology Inc.
DS21615B-page11
TCM811/TCM812
NOTES:
DS21615B-page 12
 2002 Microchip Technology Inc.
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
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rights.
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 2002 Microchip Technology Inc.
DS21615B - page 13
M
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Co., Ltd., Chengdu Liaison Office
Rm. 2401, 24th Floor,
Ming Xing Financial Tower
No. 88 TIDU Street
Chengdu 610016, China
Tel: 86-28-6766200 Fax: 86-28-6766599
China - Fuzhou
Microchip Technology Consulting (Shanghai)
Co., Ltd., Fuzhou Liaison Office
Unit 28F, World Trade Plaza
No. 71 Wusi Road
Fuzhou 350001, China
Tel: 86-591-7503506 Fax: 86-591-7503521
China - Shanghai
Microchip Technology Consulting (Shanghai)
Co., Ltd.
Room 701, Bldg. B
Far East International Plaza
No. 317 Xian Xia Road
Shanghai, 200051
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060
China - Shenzhen
150 Motor Parkway, Suite 202
Hauppauge, NY 11788
Tel: 631-273-5305 Fax: 631-273-5335
Microchip Technology Consulting (Shanghai)
Co., Ltd., Shenzhen Liaison Office
Rm. 1315, 13/F, Shenzhen Kerry Centre,
Renminnan Lu
Shenzhen 518001, China
Tel: 86-755-2350361 Fax: 86-755-2366086
San Jose
Hong Kong
Microchip Technology Inc.
2107 North First Street, Suite 590
San Jose, CA 95131
Tel: 408-436-7950 Fax: 408-436-7955
Microchip Technology Hongkong Ltd.
Unit 901-6, Tower 2, Metroplaza
223 Hing Fong Road
Kwai Fong, N.T., Hong Kong
Tel: 852-2401-1200 Fax: 852-2401-3431
New York
Toronto
6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: 905-673-0699 Fax: 905-673-6509
India
Microchip Technology Inc.
India Liaison Office
Divyasree Chambers
1 Floor, Wing A (A3/A4)
No. 11, O’Shaugnessey Road
Bangalore, 560 025, India
Tel: 91-80-2290061 Fax: 91-80-2290062
Japan
Microchip Technology Japan K.K.
Benex S-1 6F
3-18-20, Shinyokohama
Kohoku-Ku, Yokohama-shi
Kanagawa, 222-0033, Japan
Tel: 81-45-471- 6166 Fax: 81-45-471-6122
Korea
Microchip Technology Korea
168-1, Youngbo Bldg. 3 Floor
Samsung-Dong, Kangnam-Ku
Seoul, Korea 135-882
Tel: 82-2-554-7200 Fax: 82-2-558-5934
Singapore
Microchip Technology Singapore Pte Ltd.
200 Middle Road
#07-02 Prime Centre
Singapore, 188980
Tel: 65-334-8870 Fax: 65-334-8850
Taiwan
Microchip Technology Taiwan
11F-3, No. 207
Tung Hua North Road
Taipei, 105, Taiwan
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139
EUROPE
Denmark
Microchip Technology Nordic ApS
Regus Business Centre
Lautrup hoj 1-3
Ballerup DK-2750 Denmark
Tel: 45 4420 9895 Fax: 45 4420 9910
France
Microchip Technology SARL
Parc d’Activite du Moulin de Massy
43 Rue du Saule Trapu
Batiment A - ler Etage
91300 Massy, France
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79
Germany
Microchip Technology GmbH
Gustav-Heinemann Ring 125
D-81739 Munich, Germany
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44
Italy
Microchip Technology SRL
Centro Direzionale Colleoni
Palazzo Taurus 1 V. Le Colleoni 1
20041 Agrate Brianza
Milan, Italy
Tel: 39-039-65791-1 Fax: 39-039-6899883
United Kingdom
Arizona Microchip Technology Ltd.
505 Eskdale Road
Winnersh Triangle
Wokingham
Berkshire, England RG41 5TU
Tel: 44 118 921 5869 Fax: 44-118 921-5820
01/18/02
*DS21615B*
DS21615B-page 14
 2002 Microchip Technology Inc.