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M
Voltage Detector
Features
* Precise Detection Thresholds: Standard 2.0%, Custom 1.0% * Small Packages: 3-Pin SOT-23A, 3-Pin SOT-89, 5-Pin SOT-23A (7.7V only) * Low Current Drain: Typ. 1A * Wide Detection Range: 1.1V to 6.0V and 7.7V * Wide Operating Voltage Range: 0.7V to 10V
TC54
General Description
The TC54 Series are CMOS voltage detectors, suited especially for battery-powered applications because of their extremely low 1A operating current and small surface-mount packaging. Each part is laser trimmed to the desired threshold voltage which can be specified from 1.1V to 6.0V and 7.7V, for a 2% and 1.5V to 6.0V for a 1% tolerance. The device includes a comparator, low-current highprecision reference, laser-trimmed divider, hysteresis circuit and output driver. The TC54 is available with either an open-drain or complementary output stage. In operation, the TC54's output (VOUT) remains in the logic HIGH state as long as VIN is greater than the specified threshold voltage (VDET -). When VIN falls below VDET - the output is driven to a logic LOW. VOUT remains LOW until VIN rises above VDET - by an amount VHYST, whereupon it resets to a logic HIGH. Temp. Range -40C to +85C
Applications
* * * * * Battery Voltage Monitoring Microprocessor Reset System Brown-out Protection Switching Circuit in Battery Backup Level Discriminator
Device Selection Table
Part Number TC54-xxxxxxxxxxx Package 3-Pin SOT-89
Functional Block Diagram
2 VIN TC54VC only
TC54-xxxxxxxxxxx 3-Pin SOT-23A -40C to +85C TC54-xxxxxxxxxxx 5-Pin SOT-23A -40C to +85C
Other output voltages are available. Please contact Microchip Technology Inc. for details.
- +
VOUT 1
Package Type
3-Pin SOT-23A
VIN 2
3-Pin SOT-89
VREF
VSS 3
TC54
1 VOUT 3 VSS 1 VOUT 2 VIN
TC54
3 VSS
TC54VN has open-drain output. TC54VC has complementary output.
5-Pin SOT-23A
NC 5 NC 4
TC54
1 VOUT 2 VIN 3 VSS
NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59. 5-Pin SOT-23A is equivalent to the EIAJ SC-74A.
2002 Microchip Technology Inc.
DS21434C-page 1
TC54
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage ........................................................+12V Output Current .................................................... 50mA Output Voltage: CMOS..... (VSS - 0.3V) to (VIN + 0.3V) Open Drain ..........(VSS - 0.3V) to 12V Power Dissipation (TA 70C): 3-Pin SOT-23A ...........................................240mW 3-Pin SOT-89 .............................................400mW 5-Pin SOT-23A ...........................................240mW Operating Temperature Range............. -40C to +85C Storage Temperature Range .............. -65C to +150C
*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 above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability.
TC54 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = 25C, unless otherwise specified. Symbol VIN ISS Parameter Operating Voltage Quiescent Current Min 0.7 -- -- -- -- VDET - x 0.98 VDET - x 0.02 -- -- -- -- -- TC (VDET -) Tempco of (VDET -) -- Typ -- 1.0 1.3 1.6 2.0 -- VDET - x 0.05 7.7 10.1 11.5 13.0 -10.0 100 Max 10.0 3.0 3.4 3.8 4.2 VDET - x 1.02 VDET - x 0.08 -- -- -- -- -- -- Units V A VIN VIN VIN VIN Test Conditions (V DET -) = 0.8 to 6.0V = 2.1V = 3.0V = 4.0V = 5.0V
VDET VHYST IOUT
Threshold Voltage Hysteresis Voltage Output Current
V V mA VOL = 0.5V, VIN = 2.1V VIN = 3.0V VIN = 4.0V VIN = 5.0V TC54VC Only; VOH = VIN - 2.1V, VIN = 8.0V
ppm/C -40C TA 85C
DS21434C-page 2
2002 Microchip Technology Inc.
TC54
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No. (3-Pin SOT-23A) (3-Pin SOT-89) 1 2 3
PIN FUNCTION TABLE
Symbol VOUT V IN VSS Description Digital output. This output goes low when VIN drops below V DET - and returns high when V IN rises above VDET - + VHYST. (See Figure 3-1, Timing Diagram.) Analog input. This pin is both the power supply input and the voltage to be monitored. Ground terminal.
Pin No. (5-Pin SOT-23A) 1 2 3 4 5
Symbol VOUT V IN VSS NC NC
Description Digital output. This output goes low when VIN drops below V DET - and returns high when V IN rises above VDET - + VHYST. (See Figure 3-1, Timing Diagram.) Analog input. This pin is both the power supply input and the voltage to be monitored. Ground terminal. Not connected. Not connected.
2002 Microchip Technology Inc.
DS21434C-page 3
TC54
3.0 DETAILED DESCRIPTION
In normal steady-state operation, when VIN > VDET -, the output will be at a logic high, see Figure 3-1. In the case of the TC54V, this is an open-drain condition. If and when the input falls below VDET -, the output will pull down (Logic 0) to V SS. Generally, VOUT can pull down to within 0.5V of VSS at rated output current and input voltage. (See Section 1.0, Electrical Characteristics). The output, V OUT, will stay valid until the input voltage falls below the minimum operating voltage, VINMIN, of 0.7V. Below this minimum operating voltage, the output is undefined. During power-up or anytime V IN has fallen below VINMIN, VOUT will remain undefined until VIN rises above VINMIN, at which time the output will become valid. V OUT will be in its active low state while VINMIN < VIN < VDET +. (V DET + = VDET - + VHYST). If and when the input rises above VDET +, the output will assume its inactive state. (High for TC54VC, open-drain for TC54VN).
FIGURE 3-1:
TIMING DIAGRAM
VIN VDET+ VHYST Detect Voltage VDETMinimum Operating Voltage Ground Level Release Voltage or RESET Voltage
VOUT
Output Voltage
Ground Level
4.0
APPLICATIONS INFORMATION
Refer to Microchip Technology Application Note #779, Using the TC54 Voltage Detector.
DS21434C-page 4
2002 Microchip Technology Inc.
TC54
5.0
5.1
PACKAGING INFORMATION
Package Marking Information
3
1
represents output configuration (CMOS or Nch) and first integer of voltage Ex: CMOS 3.x = Symbol B C D E F H Symbol L M N P R S T
D
1
represents output configuration and first integer of voltage Symbol Output Nch Voltage 7.
Output CMOS CMOS CMOS CMOS CMOS CMOS Output Nch Nch Nch Nch Nch Nch Nch
Voltage 1. 2. 3. 4. 5. 6. Voltage 1. 2. 3. 4. 5. 6. 7.
2
T
represents first decimal of output voltage Symbol 0 1 2 3 4 5 6 7 8 9 Voltage .0 .1 .2 .3 .4 .5 .6 .7 .8 .9
3
&
4
represents assembly lot code
2
represents first decimal of output voltage (0-9) Ex: CMOS 3.x =
D4
3
&
4
represents assembly lot code
2002 Microchip Technology Inc.
DS21434C-page 5
TC54
5.2 Taping Form
Component Taping Orientation for 3-Pin SOT-23A (EIAJ SC-59) 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
3-Pin SOT-23A
8 mm
4 mm
3000
7 in
Component Taping Orientation for 3-Pin SOT-89 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, Reel Size, and Number of Components Per Reel
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
3-Pin SOT-89
12 mm
8 mm
1000
7 in
DS21434C-page 6
2002 Microchip Technology Inc.
TC54
5.2 Taping Form (Continued)
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
User Direction of Feed
Device Marking
W
PIN 1
P Standard Reel Component Orientation 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
5-Pin SOT-23A
8 mm
4 mm
3000
7 in
5.3
Package Dimensions
SOT-23A-3
.020 (0.50) .012 (0.30)
.118 (3.00) .098 (2.50)
.071 (1.80) .055 (1.40)
PIN 1 .075 (1.90) REF. .122 (3.10) .106 (2.70) .051 (1.30) .035 (0.90) .006 (0.15) .000 (0.00)
10 MAX. .022 (0.55) .014 (0.35)
.010 (0.25) .004 (0.09)
Dimensions: inches (mm)
2002 Microchip Technology Inc.
DS21434C-page 7
TC54
5.3 Package Dimensions (Continued)
SOT-89-3
.181 (4.60) .173 (4.39) .071 (1.80) .063 (1.60) .063 (1.60) .055 (1.40)
.102 (2.59) .090 (2.29) .019 (0.48) .014 (0.36) PIN 1 .022 (0.56) .016 (0.41)
.167 (4.24)
.031 (0.79) MIN. .017 (0.43) .014 (0.36)
.063 (1.60) .055 (1.40) .019 (0.48) .014 (0.36)
Dimensions: inches (mm)
SOT-23A-5
.075 (1.90) REF.
.122 (3.10) .098 (2.50) .020 (0.50) .012 (0.30) PIN 1 .122 (3.10) .106 (2.70) .057 (1.45) .035 (0.90) .006 (0.15) .000 (0.00)
.071 (1.80) .059 (1.50)
.037 (0.95) REF.
10 MAX. .024 (0.60) .004 (0.10)
.010 (0.25) .004 (0.09)
Dimensions: inches (mm)
DS21434C-page 8
2002 Microchip Technology Inc.
TC54
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office
PART CODE
Output Configuration: N = Nch Open Drain C = CMOS Output Detected Voltage: Ex: 15 = 1.5V; 60 = 6.0V Ex: 11 = 1.1V; 60 = 6.0V Extra Feature Code: Fixed: 0 Tolerance: 1 = 1% (custom) 2 = 2% (standard) Temperature: E: -40C to +85C
TC54V
X
XX
X
X
X
XX
XXX
Package Type and Pin Count: CB: 3-Pin SOT-23A (equivalent to EIAJ SC-59) MB: 3-Pin SOT-89 CT: 5-Pin SOT-23A (equivalent to EIAJ SC-74A) Taping Direction: TR: Standard Taping
Sales and Support
Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
2002 Microchip Technology Inc.
DS21434C-page9
TC54
NOTES:
DS21434C-page10
2002 Microchip Technology Inc.
TC54
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 patents or other intellectual property rights arising from such use or otherwise. Use of Microchip's products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, FilterLab, KEELOQ, microID, MPLAB, MXDEV, PIC, PICmicro, PICMASTER, PICSTART, PRO MATE, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. dsPIC, dsPICDEM.net, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXLAB, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode and Total Endurance are trademarks of Microchip Technology Incorporated in the U.S.A. Serialized Quick Turn Programming (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. (c) 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
Printed on recycled paper.
2002 Microchip Technology Inc.
DS21434C-page 11
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DS21434C-page 12
2002 Microchip Technology Inc.

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