2002 Microchip Technology Inc. DS21430B-page 1
MTC52
Features
• Two Independent Voltage Detectors in One
Package
• Highly Accurate: ±2%
• Low Power Consumption: 2.0µA, Typ.
• Detect Voltage Range: 1.5V to 5.0V
• Operating Voltage: 1.5V to 10.0V
• Output Configuration: N-Channel Open-Drain
• Space-Saving 5-Pin SOT-23A Package
Typical Applications
• Battery Life Monitors and Recharge Voltage
Monitors
• Memory Battery Backup Circuitry
• Power-On Reset Circuits
• Power Failure Detection
• Delay Circuitry
Device Selection Table
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
General Description
The TC52 consists of two independent low power
voltage detectors in a space-saving 5-pin SOT-23A
package. Typical supply current consumption is only
2µA at an input voltage of 2V. The voltage detection
threshold settings are factory-programmed and
guarante ed to ±2% accu racy . Threshold settings over a
range of 1.5V to 5.0V are available. The TC52 is
available with open drain (NMOS) configurations.
Small size, high precision, low supply current, and low
installed cost makes the TC52 the ideal voltage
detector for a wide variety of voltage monitoring
applications.
Functional Block Diagram
Part Nu mbe r Package Temp. Range
TC52-xxxxxxxxxx 5-Pin SOT -23A -40°C to +85°C
5
VOUT2
VOUT1 GND
5-Pin SOT-23A
TC52
13
4
VIN2
2
VIN1
VREF
+
–
+
–
VIN1
VOUT1
VOUT2
GND
VIN2
Dual Channel Voltage Detector
TC52
DS21430B-page 2 2002 Microchip Technology Inc.
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage ........................................................+12V
Output Curren t ....................................................50mA
Output Volt age... ...... ..............VIN + 0.3V to VSS – 0.3V
Power Dissipation
5-Pin SOT-23A...........................................100mW
Operati ng Tem pe ratu re Range...... ...... .-40°C to +85°C
Storage Temperature Range..............-40°C to +125°C
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. These
are stress ratings only and funct ional 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.
TC52 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = 25°C, unless otherwise specified. Note 1.
Symbol Parameter Min Typ Max Units Test Conditions
VIN Operating Voltage 1.5 —10.0 V VDF (T) = 1.5 to 5.0V
ISS Supply Current —
—
—
—
—
1.35
1.50
1.95
2.40
3.00
3.90
4.50
5.10
5.70
6.30
µA VIN1 = 1.5V
VIN1 = 2.0V
VIN1 = 3.0V
VIN1 = 4.0V
VIN1 = 5.0V
IIN2 Input Current VIN2 —
—
—
—
—
0.45
0.50
0.65
0.80
1.00
1.30
1.50
1.70
1.90
2.10
µA VIN1 = 1.5V
VIN1 = 2.0V
VIN1 = 3.0V
VIN1 = 4.0V
VIN1 = 5.0V
VDET1 -Channel 1 Detect Voltage VT1 x 0.98 VT1 ±0.5% VT1 x 1.02 VNote 2
VDET2 -Channel 2 Detect Voltage VT2 x 0.98 VT2 ±0.5% VT2 x 1.02 VNote 2
VHYS1 Hysteresis Range 1 VDET1 - x 0.02 VDET1 - x 0.05 VDET1 - x 0.08 V
VHYS2 Hysteresis Range 2 VDET2 - x 0.02 VDET2 - x 0.05 VDET2 - x 0.08 V
IOUT Output Current 0.3
3.0
5.0
6.0
7.0
2.2
7.7
10.1
11.5
13.0
—
—
—
—
—
mA VOL = 0.5V, VIN1 = 1.0V
VIN1 = 2.0V
VIN1 = 3.0V
VIN1 = 4.0V
VIN1 = 5.0V
∆VDET-/
(∆TOPR VDET -) Temperature Charac teristics —±100 —ppm/°C-40°C ≤ TOPR ≤ 85°C
tDLY Detection Time — — 0.2 msec Time from VIN = VDET- to
VOUT = VOL
Note 1: Additional resistance be tween the VIN1 pin and the supply voltage may alter the electrical characteristics.
2: VT1, VT2 are the factory-programmed voltage detection thresholds.
2002 Microchip Technology Inc. DS21430B-page 3
TC52
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
3.0 DETAILED DESCRIPTION
In normal steady-state operation and for either
channel, when VIN > VDET-, the output is high, see
Figure 3-1. (In the case of the TC52N, this is an open-
drain condition.) If and when the input falls below
VDET-, the output pulls down (Logic 0) to VSS.
Generally, VOUT can pull down to within 0.5V of VSS at
rated output current and input voltages. (Also see
Section 1.0, Electrical Characteristics).
The output, VOUT, st ays valid until the input v oltage fa lls
below the minimum operating voltage, VINMIN, of 0.7V.
Below this minimum operating voltage, the output is
undefined. During power-up or anytime VIN has fallen
below VINMIN, VOUT will r emain und efined un til VIN ri ses
above VINMIN, at which time the output becomes valid.
VOUT is mainta ined i n it s activ e low sta te wh ile VINMIN <
VIN < VDET+. (VDET+ = VDET - + VHYST). If and when
the input rises above VDET+, the output will assume its
inactive state (open-drain for TC52N).
FIGURE 3-1: TIMING DIAGRAM
Pin No.
(5-Pin SOT-23A) Symbol Description
1 VOUT1 Detector #1 output.
2 VIN Supply voltage input, detect voltage 1.
3GND Ground terminal.
4 VIN2 Detect voltage 2.
5 VOUT2 Detector #2 output.
V
INx
Detect Voltage V
DET
–
Minimum Operatin
g
Volta
ge
V
HY
ST
V
DET
+
Output Volta
ge
Release Volta
ge
or RESET Volta
ge
Ground Level
Ground Level
V
OU
T
x
TC52
DS21430B-page 4 2002 Microchip Technology Inc.
4.0 APPLICATIONS INFORMATION
Pin 2 (VIN1) acts as both the input to Voltage Detector
#1, as well as the power supply input for the chip. As
such, always a ssign VIN1 to monitor voltages between
1.5V and 10V. Failure to do this will result in unreliable
detector operation due to an out-of-tolerance supply
voltage. In high noise environments, it may be
necessary to install a small input bypass capacitor
(0.01µF to 0. 1µF) from VIN1 to ground to minimize on-
chip power supply noise.
4.1 Battery and Main Supply Monitor
The circuit shown in Figure 4-1 provides both a
processor supply monitor/reset function, as well as a
low battery detect function. As shown, the
TC52 N3 33 0 EC T (N -C ha nne l ou t p uts) us es D e tec t or 2
to monitor the system power supply rail. When the
power supply is 10% below its nominal output voltage
rating, the VOUT2 output is driven and held low. When
the power supply volta ge is above 3.0V nominal, VOUT2
is driven to an open circuit and the combination of R1
and C1 provides a reset time out delay. Detector 1
monitors the voltage on the main supply battery. A low
batt ery co nditio n is indi cate d when th e batte ry volta ge
falls to 3.3V, at which time the main processor is
interrupted to initiate a warning or system shutdown.
FIGURE 4-1: SUPPLY MONITOR AND PROCESSOR SUPERVISOR
TC105
Step Down
DC/DC
Converter
6V
Battery
VIN2 VOUT2
GND
TC52N3330ECT
VIN1 VOUT1
RESET
Processor
INT
System
3.3V
+3.3V
R1
47K
+C1
1µF
–
+3.3V
+
–
R2
47K
2002 Microchip Technology Inc. DS21430B-page 5
TC52
5.0 PACKAGING INFORMATION
5.1 Package Marking Information
Note: Symbols for other custom voltages set prior to shipment.
5.2 Taping Form
Symbol Output
CCMOS
NNch
Symbol Detect Voltage 1 Detect Voltage 2
0P 4.5 2.7
3
1represents N-channel indication and integer part
of output voltage
2represents registration serial number
3
4repr esents assembly lot code
Component Taping Orientation for 5-Pin SOT-23A (EIAJ SC-74A) Devices
Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size
5-Pin SOT-23A 8 mm 4 mm 3000 7 in
Carrier Tape, Number of Components Per Reel and Reel Size
User Direction of Feed
Device
Marking
PIN 1
Standard Reel Component Orientation
TR Suffix Device
(Mark Right Side Up)
W
P
TC52
DS21430B-page 6 2002 Microchip Technology Inc.
5.3 Package Dimensions
.071 (1.80)
.059 (1.50)
.122 (3.10)
.098 (2.50)
.075 (1.90)
REF.
.020 (0.50)
.012 (0.30)
PIN 1
.037 (0.95)
REF.
.122 (3.10)
.106 (2.70)
.057 (1.45)
.035 (0.90)
.006 (0.15)
.000 (0.00)
.024 (0.60)
.004 (0.10)
10° MAX. .010 (0.25)
.004 (0.09)
SOT-23A-5
Dimensions: inches (mm)
2002 Microchip Technology Inc. DS21430B-page7
TC52
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
Sales and Support
PART CODE TC52 N45 27 ECT XX
Output Configuration :
N = Open Drain
Detected Voltage 1*:
Ex: 45 = 4.5V
Detected Voltage 2*:
Ex: 27 = 2.7V
Temperature:
E: -40°C to +85°C
Package Type and Pin Count:
CT: 5-Pin SOT-23A
Taping Direction:
TR: Standard Taping
*Other voltages are available. Please contact Microchip Technology Inc. for details.
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office
2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
3. The Microchip Worldwide Site (www. micr ochip.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.
TC52
DS21430B-page8 2002 Microchip Technology Inc.
NOTES:
2002 Microchip Technology Inc. DS21430B-page 9
TC52
Information contained in this publication regarding device
applications and the like is intended through sug gestion 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 Microc hip Technology Incorporated with respect
to the accuracy or use of such inf orm ation, or inf ringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s product s as critical com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip T ech-
nology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexRO M, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, MXLAB, PICC, PICDEM, PICDEM.net, rfPI C, 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.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
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and Mountain View, California in March 2002.
The Company’s quality system processes and
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design and manufacture of development
systems is ISO 9001 certified.
DS21430B-page 10 2002 Microchip Technology Inc.
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