TC1272-10ENBTR [MICROCHIP]
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, SOT-23B, 3 PIN;
| 型号： | TC1272-10ENBTR |
| 厂家： | 
MICROCHIP |
| 描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, SOT-23B, 3 PIN 光电二极管 |
| 文件： | 总12页 (文件大小：477K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Obsolete Device
TC1272/TC1273/TC1274
3-Pin Reset Monitors for 5V Systems
Features
General Description
• Precision VCC Monitor for 5.0V Systems
The TC1272/TC1273/TC1274 are cost-effective
system supervisor circuits designed to monitor VCC in
digital systems and provide a reset signal to the host
processor when necessary. No external components
are required.
• 100 ms Minimum RESET, RESET Output
Duration
• Output Valid to VCC = 1.2V
• VCC Transient Immunity
• Small 3-Pin SOT-23 Package
• No External Components
The reset output is driven active within 20 µs of VCC
falling through the reset voltage threshold. RESET is
maintained active for a minimum of 100 ms after VCC
rises above the reset threshold. The TC1274 has an
active-high RESET output, while the TC1272 and
TC1273 have an active-low RESET output. The
TC1272 and TC1274 each have a complimentary out-
put, while the TC1273 has an open-drain output. The
output of the TC1272 and TC1273 is valid down to VCC
= 1.2V. The TC1274 is valid down to VCC = 1.8V. All
three devices are available in a 3-Pin SOT-23
package.
Applications
• Computers
• Embedded Systems
• Battery-Powered Equipment
• Critical µP Power Supply Monitoring
Package Type
3-Pin SOT-23
The TC1272/TC1273/TC1274 devices are optimized to
reject fast transient glitches on the VCC line.
Typical Application Circuit
RESET
1
**(RESET)
VCC
TC1272
TC1273
TC1274
2
VCC
3
GND
VCC
RESET
1
VCC
2
RESET
Input
Processor
TC1272
**( ) is for TC1274
GND
3
GND
© 2007 Microchip Technology Inc.
DS21382C-page 1
TC1272/TC1273/TC1274
† Stresses above those listed under "Absolute Maximum Rat-
ings" may cause permanent damage to the device. These are
stress ratings only and functional operation of the device at
these or any other conditions above those indicated in the
operation sections of the specifications is not implied. Expo-
sure to Absolute Maximum Rating conditions for extended
periods may affect device reliability.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
Supply Voltage (VCC to GND) .............................+6.0V
RESET, RESET.......................... -0.3V to (VCC + 0.3V)
Input Current, VCC..............................................20 mA
Output Current, RESET, RESET........................20 mA
Power Dissipation (TA ≤ 70°C)
3-Pin SOT-23 (derate 4 mW/°C above +70°C)
................................................................230 mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature Range..............-65°C to +150°C
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, TA = -40°C to +85°C. Typical values are at TA = +25°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Supply Voltage
TC1272, TC1273
TC1274
VCC
VCC
VOH
1.2
1.8
—
—
5.5
5.5
—
V
V
V
Note 1
Output Voltage @ 0-500 µA
VCC – 0.5V VCC – 0.1V
TC1272, TC1274 (Note 1)
Note 2
Output Current @ 2.4 Volts
VCC = 5V TC1272
VCC = 4V TC1274
Output Current @ 0.4 Volts
Operating Current
VCC < 5.5V: TC1272, TC1274
IOH
IOH
IOL
—
—
10
8
—
—
—
mA
mA
mA
+10
30
Note 2, Note 5
ICC
ICC
ICC
—
—
17
17
40
40
µA
µA
µA
V
Note 3
Note 3
Note 3
Note 1
Note 1
Note 1
VCCTP < VCC < 5.5V: TC1273
VCC < VCCTP: TC1273
—
700
4.62
4.37
4.12
9
1200
4.75
4.49
4.24
—
VCC Trip Point (TC1272/3/4-5) VCCTP-5
VCC Trip Point (TC1272/3/4-10) VCCTP-10
VCC Trip Point (TC1272/3/4-15) VCCTP-15
4.50
4.25
4.00
—
V
V
Output Capacitance
COUT
RP
pF
kΩ
Internal Pull-Up Resistor
3
6
9
AC Electrical Characteristics: TA = -40°C to +85°C unless otherwise noted. Typical values are at TA = +25°C.
RESET Active Time
tRST
100
—
200
20
300
50
ms
µs
VCC Detect to RESET
TC1272, TC1273
tRPD1
VCC(LOW) = 1V, Figure 4-2
VCC Detect to RESET - TC1274
tRPD2
tF
—
20
—
50
—
µs
µs
VCC(LOW) = 1V, Figure 4-4
Figure 4-2, Figure 4-4
VCC Slew Rate
300
(VCCTP(MAX) to VCCTP(MIN))
VCC Slew Rate
(VCCTP(MIN) to VCCTP(MAX))
tR
0
—
—
ns
ms
ms
Figure 4-1, Figure 4-3
Note 4, Figure 4-1
Note 4, Figure 4-3
V
CC Detect to RESET
tRPU1
tRPU2
100
100
200
200
300
300
TC1272, TC1273
VCC Detect to RESET - TC1274
Note 1: All voltages referenced to ground.
2: Measured with VCC ≥ 2.7 volts.
3: Measured with RESET output open for TC1272/TC1273; measured with RESET output open for TC1274.
4: R = 5 µs.
t
5: A 1 kΩ external resistor may be required in some applications for proper operation of the microprocessor reset control
circuit when using the TC1273.
DS21382C-page 2
© 2007 Microchip Technology Inc.
TC1272/TC1273/TC1274
2.0
TYPICAL PERFORMANCE CURVES
Note: The graphs and tables 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 or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, TA = -40°C to +85°C. Typical values are at TA = +25°C.
Comparator Overdrive voltage (VOD) is defined in Figure 4-5
300
T
= 25°C
A
T
= 25°C
A
100000
10000
1000
V
= 20mV
OD
200
V
= 100mV
OD
V
= 200mV
OD
V
= 1V
OD
V
= 2V
OD
100
0
100
10
1
10
V
1000 10000
SLEW RATE (V/ sec)
100
100000
4
5
0
1
2
3
μ
COMPARATOR OVERDRIVE (V)
CC
FIGURE 2-1:
V
Detect to Reset
FIGURE 2-2:
Reset Delays vs.
CC
(RESET).
Comparator Overdrive.
© 2007 Microchip Technology Inc.
DS21382C-page 3
TC1272/TC1273/TC1274
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
Pin No.
PIN FUNCTION TABLES
Symbol
Function
1
1
2
3
RESET
RESET
VCC
RESET Output (TC1272 and TC1273)
RESET Output (TC1274)
Supply voltage (1.2V to 5.5V TC1272 and TC1273; 1.8V to 5.5V TC1274)
Ground
GND
3.1
RESET Output (RESET)
3.2
RESET Output (RESET)
The RESET output remains low while VCC is below the
reset voltage threshold, and for 200 ms (100 ms
minimum) after VCC rises above reset threshold. The
output stage of the TC1272 is complimentary, while the
output stage of the TC1273 is open-drain.
The RESET output remains high while VCC is below the
reset voltage threshold, and for 200 ms (100 ms
minimum) after VCC rises above reset threshold. The
output stage of the TC1274 is complimentary.
DS21382C-page 4
© 2007 Microchip Technology Inc.
TC1272/TC1273/TC1274
4.0
4.1
APPLICATIONS INFORMATION
Operation – Power Monitor
t
R
The TC1272/TC1273/TC1274 is designed to function
as a voltage monitor for +5V systems. These devices
provide a RESET signal to indicate that the VCC has
dropped below a preset voltage level that is selected by
the suffix part number. In addition, the RESET is held
active for approximately 200 ms after the power supply
has risen above the voltage threshold level to allow
time for the power supply to stabilize before system
operation commences.
VCCTP(MAX)
CCTP
V
V
(MIN)
CCTP
V
CC
t
RPU2
V
OL
RESET
t
R
FIGURE 4-3:
(TC1274).
Timing Diagram – Power Up
V
(MAX)
CCTP
V
CCTP
V
(MIN)
CCTP
V
CC
t
F
t
V
RPU1
CC
V
(MAX)
CCTP
V
V
OH
CCTP
V
(MIN)
CCTP
RESET
t
RPD2
FIGURE 4-1:
(TC1272/TC1273).
Timing Diagram – Power Up
V
OH
tF
RESET Slews With V
CC
V
CC
RESET
V
(MAX)
CCTP
V
CCTP
FIGURE 4-4:
Timing Diagram –
V
(MIN)
CCTP
Power Down (TC1274).
t
RPD1
RESET
V
OL
FIGURE 4-2:
Timing Diagram – Power
Down (TC1272/TC1273).
© 2007 Microchip Technology Inc.
DS21382C-page 5
TC1272/TC1273/TC1274
4.2
VCC Transient Rejection
VCC
The TC1272/TC1273/TC1274 provides accurate VCC
monitoring and reset timing during power-up, power-
down and brownout/sag conditions, and rejects
negative-going transients (glitches) on the power
supply line. Figure 4-5 shows the maximum transient
duration vs. maximum negative excursion (overdrive)
for glitch rejection. Any combination of duration and
overdrive that lays under the curve will not generate a
reset signal. Combinations above the curve are
detected as a brownout or power-down condition.
Transient immunity can be improved by adding a
capacitor in close proximity to the VCC pin of the
TC1272/TC1273/TC1274.
VTH
Overdrive
Duration
500
TA = +25°C
400
300
200
4.3
RESET Signal Integrity During
Power-Down
The TC1272 RESET output is valid to VCC = 1.2V.
Below this voltage the output becomes an "open
circuit" and does not sink current. This means CMOS
logic inputs to the μP will be floating at an undeter-
mined voltage. Most digital systems are completely
shut down well above this voltage. However, in situa-
tions where RESET must be maintained valid to
VCC = 0V, a pull-down resistor must be connected from
RESET to ground to discharge stray capacitances and
hold the output low (Figure 4-6). This resistor value,
though not critical, should be chosen such that it does
not appreciably load RESET under normal operation
(100 kΩ will be suitable for most applications). Simi-
larly, a pull-up resistor to VCC is required for the
TC1274 to ensure a valid high RESET for VCC below
1.8V.
TC1272/3/4
100
100
0
1
10
1000
RESET COMPARATOR OVERDRIVE,
[VCCTP-VCC] (mV)
FIGURE 4-5:
Maximum Transient
Duration vs. Overdrive For Glitch Rejection At
+25°C.
VCC
VCC
TC1272
RESET
R1
100 kΩ
GND
FIGURE 4-6:
= 0V.
Ensuring Reset Valid To
V
cc
DS21382C-page 6
© 2007 Microchip Technology Inc.
TC1272/TC1273/TC1274
5.0
5.1
PACKAGING INFORMATION
Package Marking Information
3-Pin SOT-23
3
1
2
3
4
1
2
1
2
represents part number code +
temperature range and voltage
&
Reset VCC
Threshold (V)
TC1272
Code
TC1273
Code
TC1274
Code
4.62
4.37
4.12
X1
X2
X3
Y1
Y2
Y3
Z1
Z2
Z3
3
4
represents year and quarter code
represents lot ID number
© 2007 Microchip Technology Inc.
DS21382C-page 7
TC1272/TC1273/TC1274
3-Lead Plastic Small Outline Transistor (TT or NB) [SOT-23]
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
b
N
E
E1
2
1
e
e1
D
c
A
A2
φ
A1
L
Units
MILLIMETERS
Dimension Limits
MIN
NOM
MAX
Number of Pins
Lead Pitch
N
e
3
0.95 BSC
Outside Lead Pitch
Overall Height
e1
A
1.90 BSC
0.89
0.79
0.01
2.10
1.16
2.67
0.13
0°
–
0.95
–
1.12
1.02
0.10
2.64
1.40
3.05
0.60
10°
Molded Package Thickness
Standoff
A2
A1
E
Overall Width
–
Molded Package Width
Overall Length
Foot Length
E1
D
1.30
2.90
0.50
–
L
Foot Angle
φ
Lead Thickness
Lead Width
c
0.08
0.30
–
0.20
0.54
b
–
Notes:
1. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.25 mm per side.
2. Dimensioning and tolerancing per ASME Y14.5M.
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
Microchip Technology Drawing C04-104B
DS21382C-page 8
© 2007 Microchip Technology Inc.
TC1272/TC1273/TC1274
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
XX
X
/XX
Examples:
Reset VCC Temperature Package
Threshold
a)
b)
c)
TC1272-10ENBTR: 4.37V Reset
Range
TC1272-15ENBTR: 4.12V Reset
TC1272-5ENBTR: 4.62V Reset
Device:
TC1272: 3-Pin Reset Monitor - Complementary
TC1273: 3-Pin Reset Monitor - Open-Drain
TC1274: 3-Pin Reset Monitor - Complementary
a)
b)
c)
TC1273-10ENBTR: 4.37V Reset
TC1273-15ENBTR: 4.12V Reset
TC1273-5ENBTR: 4.62V Reset
Reset V
Threshold Voltage
5
10
15
=
=
=
4.62V
4.37V
4.12V
CC
a)
b)
c)
TC1274-10ENBTR: 4.37V Reset
TC1274-15ENBTR: 4.12V Reset
TC1274-5ENBTR: 4.62V Reset
Temperature Range:
Package:
E
=
=
-40°C to +85°C
NB
Plastic Small Outline Transistor (SOT-23), 3-lead
ꢀ 2007 Microchip Technology Inc.
DS21382C-page9
TC1272/TC1273/TC1274
NOTES:
DS21382C-page 10
ꢀ 2007 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC,
PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and
SmartShunt are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
AmpLab, FilterLab, Linear Active Thermistor, Migratable
Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor
and The Embedded Control Solutions Company are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,
ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi,
MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit,
PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,
PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB,
rfPICDEM, Select Mode, Smart Serial, SmartTel, Total
Endurance, UNI/O, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2007, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona, Gresham, Oregon and Mountain View, California. The
Company’s quality system processes and procedures are for its PIC®
MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial
EEPROMs, microperipherals, nonvolatile memory and analog
products. In addition, Microchip’s quality system for the design and
manufacture of development systems is ISO 9001:2000 certified.
© 2007 Microchip Technology Inc.
DS21382C-page 11
WORLDWIDE SALES AND SERVICE
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Habour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-4182-8400
Fax: 91-80-4182-8422
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://support.microchip.com
Web Address:
www.microchip.com
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Japan - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Korea - Gumi
Tel: 82-54-473-4301
Fax: 82-54-473-4302
Boston
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Korea - Seoul
China - Fuzhou
Tel: 86-591-8750-3506
Fax: 86-591-8750-3521
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Malaysia - Penang
Tel: 60-4-646-8870
Fax: 60-4-646-5086
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
China - Xian
Tel: 86-29-8833-7250
Fax: 86-29-8833-7256
12/08/06
DS21382C-page 12
© 2007 Microchip Technology Inc.
相关型号：
©2020 ICPDF网 联系我们和版权申明