TCM811TERC [MICROCHIP]
4-Pin Microcontroller Reset Monitors; 4引脚单片机复位监视器
| 型号： | TCM811TERC |
| 厂家： | 
MICROCHIP |
| 描述： | 4-Pin Microcontroller Reset Monitors |
| 文件： | 总14页 (文件大小：251K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TCM811/TCM812
M
4-Pin Microcontroller Reset Monitors
Features
General Description
• Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V,
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 control-
ler 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.
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 out-
put 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.
5.0V Nominal Supplies
• Manual Reset Input
• 140 msec Minimum RESET Output Duration
• RESET Output Valid to VDD = 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/TCM812 are optimized to reject fast tran-
sient glitches on the VDD line. A low supply current of
6 µA (VDD = 3.3V) makes these devices ideal for battery
powered applications.
Applications
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microcontroller Power Supply Monitoring
Package Types:
SOT-143
Typical Application Circuit
VDD
VDD
MR
4
3
1
2
GND
VDD
4
0.1µF
VDD
PIC
TCM811
Microcontroller
3
MR
TCM811 RESET
TCM812 (RESET)
2
RESET
RESET
GND
PUSH
INPUT
BUTTON
(Active Low)
GND
2002 Microchip Technology Inc.
DS21615B-page 1
TCM811/TCM812
1.0
ELECTRICAL
PIN FUNCTION TABLE
CHARACTERISTICS
NAME
FUNCTION
GND
RESET (TCM811)
Ground
ABSOLUTE MAXIMUM RATINGS*
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 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.
Supply Voltage (VDD to GND).........................................+6.0V
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 Rat-
ings” 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 con-
ditions for extended periods may affect device reliability.
RESET (TCM812)
MR
Manual Reset input generates a
reset when MR is below VIL.
Supply Voltage
VDD
ELECTRICAL CHARACTERISTICS
VDD = 5V for L/M versions, VDD = 3.3V for T/S versions, VDD = 3V for R version, VDD = 2.0V for F version.
T = –40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C. (Note 1)
A
A
Parameters
DD Range
Sym
Min
Typ
Max
Units
Conditions
V
VDD
1.0
1.1
—
—
5.5
5.5
V
TCM811
TCM812
Supply Current
I
—
—
6
15
10
µA
V
TCM81_L/M, VDD = 5.5V, I
= 0
OUT
CC
OUT
4.75
TCM81_R/S/T/F, VDD = 3.6V, I
= 0
Reset Threshold
V
4.54
4.50
4.63
—
4.72
4.75
TCM81_L: T = +25°C
TH
A
T = –40°C to +85°C
A
4.30
4.25
4.38
—
4.46
4.50
TCM81_M: T = +25°C
A
T = –40°C to +85°C
A
3.03
3.00
3.08
—
3.14
3.15
TCM81_T: T = +25°C
A
T = –40°C to +85°C
A
2.88
2.85
2.93
—
2.98
3.00
TCM81_S: T = +25°C
A
T = –40°C to +85°C
A
2.58
2.55
2.63
—
2.68
2.70
TCM81_R: T = +25°C
A
T = –40°C to +85°C
A
1.71
1.70
1.75
—
1.79
1.80
TCM81_F: T = +25°C
A
T = –40°C to +85°C
A
Reset Threshold Tempco
VDD to Reset Delay
—
—
—
30
20
5
—
—
—
ppm/°C
µsec VDD = V to V –125 mV; L, M,
TH TH
R, S, T, F
Reset Active Timeout Period
MR Minimum Pulse Width
MR Glitch Immunity
MR to Reset Propagation
Delay
t
140
10
—
280
—
100
0.5
560
—
—
msec VDD = V
µsec
nsec
RP
TH(MAX)
t
MR
t
—
—
µsec
MD
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, VDD = 3.3V for T/S versions, VDD = 3V for R version, VDD = 2.0V for F version.
T = –40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C. (Note 1)
A
A
Parameters
Sym
Min
Typ
Max
Units
Conditions
MR Input Threshold
V
2.3
—
—
—
—
0.8
V
VDD > V
TH(MAX),
IH
IL
V
TCM81_L/M
V
0.7 VDD
—
10
—
—
—
20
—
—
V
VDD > V
,
TH(MAX)
IH
IL
V
0.25 VDD
40
TCM81_R/S/T/F
MR Pull-up Resistance
RESET Output Voltage Low
(TCM811)
kΩ
V
V
0.3
TCM811R/S/T only;
OL
I
SINK = 1.2 mA, VDD = VTH(MIN)
—
—
—
—
0.4
0.3
V
V
TCM811F only;
SINK = 500 µA, VDD = VTH(MIN)
TCM811L/M only;
I
I
SINK = 3.2 mA, VDD = VTH(MIN)
ISINK = 3.2 mA, VDD = VTH(MIN)
TCM811R/S/T/F only;
RESET Output Voltage High
(TCM811)
V
0.8 VDD
VDD - 1.5
—
—
—
—
—
—
—
—
—
V
V
V
OH
I
SOURCE = 500 µA, VDD > VTH(MAX)
TCM811L/M only;
SOURCE = 800 µA, VDD > VTH(MAX)
I
RESET Output Voltage Low
(TCM812)
V
0.2
0.3
0.4
—
TCM812F only, ISINK = 500 µA,
DD = V
OL
V
TH(MAX)
—
TCM812R/S/T only, ISINK = 1.2 mA,
DD = V
V
TH(MAX)
—
TCM812L/M only, ISINK = 1.2 mA,
DD = V
V
TH(MAX)
RESET Output Voltage High
(TCM812)
V
0.8 VDD
V
ISOURCE = 150 µA, VDD ≤ V
TH(MIN)
OH
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
(100 kΩ will be suitable for most applications). Simi-
larly, a pull-up resistor to VDD is required for the
TCM812 to ensure a valid high RESET for VDD below
1.1V.
2.0
APPLICATIONS INFORMATION
The TCM811/TCM812 provides accurate VDD monitor-
ing and reset timing during power-up, power-down, and
brownout/sag conditions. These devices also reject
negative-going transients (glitches) on the power sup-
ply line. Figure 2-1 shows the maximum transient dura-
tion vs. maximum negative excursion (overdrive) for
glitch rejection. Any combination of duration and over-
drive 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 proxim-
ity to the VDD pin of the TCM811/812.
VDD
4
VDD
0.1µF
TCM811
2
RESET
R
V
DD
1
100 kΩ
GND
1
V
TH
Overdrive =
V
D D
FIGURE 2-2: The addition of R at the RESET
1
output of the TCM811 ensures that the RESET output
is valid to VDD = 0V.
Duration
400
T
= +25˚C
2.2
Controllers and Processors With
Bidirectional I/O Pins
A
320
240
160
Some microcontrollers have bi-directional reset pins.
Depending on the current drive capability of the control-
ler 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.
TCM81xL/M
80
0
TCM81xR/S/T
10
1
1000
100
RESET COMPARATOR OVERDRIVE,
- V (mV)
V
TH
DD
Buffered RESET
To Other System
Components
FIGURE 2-1: Maximum Transient Duration vs.
BUFFER
Overdrive for Glitch Rejection at 25°C.
2.1
RESET Signal Integrity During Power-
Down
VDD
4
The TCM811 RESET push-pull output is valid to VDD
=
Micro
0.1µF
TCM811
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 com-
pletely shutdown well above this voltage. However, in
situations where RESET must be maintained valid to
controller
4.7 kΩ
RESET
RESET
GND
2
GND
1
V
DD = 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
FIGURE 2-3: Interfacing the TCM811 to
a Bi-
directional Reset I/O.
DS21615B-page 4
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.
14
12
8
TCM81xL/M
No Load
TCM81xR/S/T/F
No Load
6
10
8
VDD = 5V
VDD = 5V
4
2
VDD = 3V
VDD = 3V
6
VDD = 1V
4
VDD = 1V
2
0
0
–40
–20
0
40
60
–40
–20
0
40
TEMPERATURE (˚C)
60
20
85
20
85
TEMPERATURE (˚C)
FIGURE 3-1: Supply Current vs. Temperature.
FIGURE 3-4: Supply Current vs. Temperature.
50
50
TCM81xF
VOD = 20 mV
VOD = 100 mV
40
30
40
VOD = 200 mV
30
20
10
VOD = 20 mV
20
10
0
VOD = 100 mV
TCM81xL/M
VOD = 200 mV
–20
0
–40
–40
0
40
60
20
85
–20
0
40
60
20
85
TEMPERATURE (˚C)
TEMPERATURE (˚C)
FIGURE 3-2: Power-Down
Reset
Delay
vs.
FIGURE 3-5: Power-Down
Reset
Delay
vs.
Temperature.
Temperature.
50
250
245
240
235
TCM81x/R/S/T
40
30
TCM81xL/M
TCM81xR/S/T/F
VOD = 200 mV
VOD = 100 mV
20
10
VOD = 20 mV
230
225
0
–40
–20
0
40
60
20
85
–40
–20
0
40
60
20
85
TEMPERATURE (˚C)
TEMPERATURE (˚C)
FIGURE 3-3: Power-Up
Reset
Timeout
vs.
FIGURE 3-6: Power-Down
Reset
Delay
vs.
Temperature.
Temperature.
2002 Microchip Technology Inc.
DS21615B-page 5
TCM811/TCM812
1.0030
1.0020
1.0010
1.0000
0.9990
0.9980
0.9970
0.9960
0.9950
0.9940
60
65
–40
–15
10
35
TEMPERATURE (˚C)
FIGURE 3-7: Normalized Reset Threshold vs.
Temperature.
DS21615B-page 6
2002 Microchip Technology Inc.
TCM811/TCM812
4.0
PACKAGING INFORMATION
4.1
Package Marking Information
4-Pin SOT-143
1
2
3
4
Part Number
(V)
Code
TCM811LERC
TCM811MERC
TCM811TERC
TCM811SERC
TCM811RERC
TCM811FERC
4.63
4.38
3.08
2.93
2.63
1.75
U1
U2
U3
U4
U5
U7
TCM812LERC
TCM812MERC
TCM812TERC
TCM812SERC
TCM812RERC
TCM812FERC
4.63
4.38
3.08
2.93
2.63
1.75
V1
V2
V3
V4
V5
V7
Legend:
1
2
3
4
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
Note: 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
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
4-Pin SOT-143
8 mm
4 mm
3000
7 in.
.079 (2.00)
.071 (1.80)
.098 (2.50)
.083 (2.10)
.055 (1.40)
.047 (1.20)
.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)
.010 (0.25)
.005 (0.13)
.021 (0.54)
.015 (0.38)
.037 (0.94)
.030 (0.77)
DS21615B-page 8
2002 Microchip Technology Inc.
TCM811/TCM812
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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 prod-
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Literature Number:
DS21615B
Device:
TCM811/TCM812
Questions:
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2. How does this document meet your hardware and software development needs?
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4. What additions to the data sheet do you think would enhance the structure and subject?
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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.
Device
X
X
XXXX
Examples:
Temperature
Range
Package
VDD
Reset
a)
TCM811LERCTR: SOT-143, Microcontroller
4.63V Reset Monitor, -40°C to +85°C, Tape and
Reel.
Threshold
b)
TCM811MERCTR: SOT-143, Microcontroller
4.38V Reset Monitor, -40°C to +85°C, Tape and
Reel.
Device:
TCM811: Supervisor Circuit with active-low RESET output
TCM812: Supervisor Circuit with active-high RESET output
VDD Reset Threshold:
L
=
=
=
=
=
=
4.63V
4.38V
3.08V
2.93V
2.63V
1.75V
a)
b)
TCM812FERCTR: SOT-143, Microcontroller
1.75V Reset Monitor, -40°C to +85°C, Tape
and Reel.
TCM812SERCTR: SOT-143, Microcontroller
2.93V Reset Monitor, -40°C to +125°C, Tape
and Reel.
M
T
S
R
F
Temperature Range:
Package:
E
=
-40°C to +85°C
RCTR
= SOT-143, 4-pin (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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2002 Microchip Technology Inc.
DS21615B - page 13
M
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Tel: 86-10-85282100 Fax: 86-10-85282104
500 Sugar Mill Road, Suite 200B
Atlanta, GA 30350
Singapore
Microchip Technology Singapore Pte Ltd.
200 Middle Road
Tel: 770-640-0034 Fax: 770-640-0307
China - Chengdu
Boston
#07-02 Prime Centre
Microchip Technology Consulting (Shanghai)
Co., Ltd., Chengdu Liaison Office
Rm. 2401, 24th Floor,
2 Lan Drive, Suite 120
Westford, MA 01886
Tel: 978-692-3848 Fax: 978-692-3821
Singapore, 188980
Tel: 65-334-8870 Fax: 65-334-8850
Taiwan
Ming Xing Financial Tower
Chicago
Microchip Technology Taiwan
11F-3, No. 207
No. 88 TIDU Street
333 Pierce Road, Suite 180
Itasca, IL 60143
Chengdu 610016, China
Tung Hua North Road
Taipei, 105, Taiwan
Tel: 86-28-6766200 Fax: 86-28-6766599
Tel: 630-285-0071 Fax: 630-285-0075
China - Fuzhou
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139
Dallas
Microchip Technology Consulting (Shanghai)
Co., Ltd., Fuzhou Liaison Office
Unit 28F, World Trade Plaza
4570 Westgrove Drive, Suite 160
Addison, TX 75001
EUROPE
Tel: 972-818-7423 Fax: 972-818-2924
No. 71 Wusi Road
Detroit
Denmark
Fuzhou 350001, China
Tri-Atria Office Building
Microchip Technology Nordic ApS
Regus Business Centre
Lautrup hoj 1-3
Tel: 86-591-7503506 Fax: 86-591-7503521
32255 Northwestern Highway, Suite 190
Farmington Hills, MI 48334
Tel: 248-538-2250 Fax: 248-538-2260
China - Shanghai
Microchip Technology Consulting (Shanghai)
Co., Ltd.
Ballerup DK-2750 Denmark
Tel: 45 4420 9895 Fax: 45 4420 9910
Kokomo
Room 701, Bldg. B
France
2767 S. Albright Road
Kokomo, Indiana 46902
Tel: 765-864-8360 Fax: 765-864-8387
Los Angeles
Far East International Plaza
No. 317 Xian Xia Road
Microchip Technology SARL
Parc d’Activite du Moulin de Massy
43 Rue du Saule Trapu
Shanghai, 200051
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060
Batiment A - ler Etage
18201 Von Karman, Suite 1090
Irvine, CA 92612
China - Shenzhen
91300 Massy, France
Microchip Technology Consulting (Shanghai)
Co., Ltd., Shenzhen Liaison Office
Rm. 1315, 13/F, Shenzhen Kerry Centre,
Renminnan Lu
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79
Tel: 949-263-1888 Fax: 949-263-1338
Germany
New York
Microchip Technology GmbH
Gustav-Heinemann Ring 125
D-81739 Munich, Germany
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44
150 Motor Parkway, Suite 202
Hauppauge, NY 11788
Shenzhen 518001, China
Tel: 631-273-5305 Fax: 631-273-5335
Tel: 86-755-2350361 Fax: 86-755-2366086
San Jose
Hong Kong
Italy
Microchip Technology Inc.
2107 North First Street, Suite 590
San Jose, CA 95131
Microchip Technology Hongkong Ltd.
Unit 901-6, Tower 2, Metroplaza
223 Hing Fong Road
Microchip Technology SRL
Centro Direzionale Colleoni
Palazzo Taurus 1 V. Le Colleoni 1
20041 Agrate Brianza
Tel: 408-436-7950 Fax: 408-436-7955
Kwai Fong, N.T., Hong Kong
Tel: 852-2401-1200 Fax: 852-2401-3431
Toronto
Milan, Italy
6285 Northam Drive, Suite 108
Mississauga, Ontario L4V 1X5, Canada
Tel: 905-673-0699 Fax: 905-673-6509
India
Tel: 39-039-65791-1 Fax: 39-039-6899883
Microchip Technology Inc.
India Liaison Office
United Kingdom
Arizona Microchip Technology Ltd.
505 Eskdale Road
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
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.
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