2002 Microchip Technology Inc.
DS21434C-page 1
M
TC54
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. 1
A
Wide Detection Range: 1.1V to 6.0V and 7.7V
Wide Operating Voltage Range: 0.7V to 10V
Applications
Battery Voltage Monitoring
Microprocessor Reset
System Brown-out Protection
Switching Circuit in Battery Backup
Level Discriminator
Device Selection Table
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
General Description
The TC54 Series are CMOS voltage detectors, suited
especially for battery-powered applications because of
their extremely low 1
A 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 high-
precision 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 (V
OUT
) remains in the
logic HIGH state as long as V
IN
is greater than the
specified threshold voltage (V
DET
-). When V
IN
falls
below V
DET
- the output is driven to a logic LOW. V
OUT
remains LOW until V
IN
rises above V
DET
- by an
amount V
HYST
, whereupon it resets to a logic HIGH.
Functional Block Diagram
Part Number
Package
Temp. Range
TC54-xxxxxxxxxxx 3-Pin SOT-23A -40C to +85C
TC54-xxxxxxxxxxx
3-Pin SOT-89
-40C to +85C
TC54-xxxxxxxxxxx 5-Pin SOT-23A -40C to +85C
1
3
2
V
IN
V
IN
V
SS
V
OUT
V
SS
V
OUT
TC54
TC54
1
3
2
3-Pin SOT-23A
3-Pin SOT-89
5
5-Pin SOT-23A
TC54
1
3
4
2
NC
V
OUT
V
IN
V
SS
NC
NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59.
5-Pin SOT-23A is equivalent to the EIAJ SC-74A.
V
OUT
TC54VC only
V
SS
1
3
+
V
IN
2
V
REF
TC54VN has open-drain output.
TC54VC has complementary output.
Voltage Detector
TC54
DS21434C-page 2
2002 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage ........................................................+12V
Output Current ....................................................50mA
Output Voltage: CMOS..... (V
SS
0.3V) to (V
IN
+ 0.3V)
Open Drain ..........(V
SS
0.3V) to 12V
Power Dissipation (T
A
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: T
A
= 25C, unless otherwise specified.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
V
IN
Operating Voltage
0.7
--
10.0
V
(V
DET
-) = 0.8 to 6.0V
I
SS
Quiescent Current
--
--
--
--
1.0
1.3
1.6
2.0
3.0
3.4
3.8
4.2
A
V
IN
= 2.1V
V
IN
= 3.0V
V
IN
= 4.0V
V
IN
= 5.0V
V
DET
-
Threshold Voltage
V
DET
- x 0.98
--
V
DET
- x 1.02
V
V
HYST
Hysteresis Voltage
V
DET
- x 0.02
V
DET
- x 0.05
V
DET
- x 0.08
V
I
OUT
Output Current
--
--
--
--
--
7.7
10.1
11.5
13.0
-10.0
--
--
--
--
--
mA
V
OL
= 0.5V, V
IN
= 2.1V
V
IN
= 3.0V
V
IN
= 4.0V
V
IN
= 5.0V
TC54VC Only;
V
OH
= V
IN
2.1V, V
IN
= 8.0V
T
C
(V
DET
-)
Tempco of (V
DET
-)
--
100
--
ppm/C -40C
T
A
85C
2002 Microchip Technology Inc.
DS21434C-page 3
TC54
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
Pin No.
(3-Pin SOT-23A)
(3-Pin SOT-89)
Symbol
Description
1
V
OUT
Digital output. This output goes low when V
IN
drops below V
DET
- and returns high when V
IN
rises above V
DET
- + V
HYST
. (See Figure 3-1, Timing Diagram.)
2
V
IN
Analog input. This pin is both the power supply input and the voltage to be monitored.
3
V
SS
Ground terminal.
Pin No.
(5-Pin SOT-23A)
Symbol
Description
1
V
OUT
Digital output. This output goes low when V
IN
drops below V
DET
- and returns high when V
IN
rises above V
DET
- + V
HYST
. (See Figure 3-1, Timing Diagram.)
2
V
IN
Analog input. This pin is both the power supply input and the voltage to be monitored.
3
V
SS
Ground terminal.
4
NC
Not connected.
5
NC
Not connected.
TC54
DS21434C-page 4
2002 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
In normal steady-state operation, when V
IN
> V
DET
-,
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 V
DET
-, the output will
pull down (Logic 0) to V
SS
. Generally, V
OUT
can pull
down to within 0.5V of V
SS
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, V
IN
MIN
, of
0.7V. Below this minimum operating voltage, the output
is undefined. During power-up or anytime V
IN
has fallen
below V
IN
MIN
, V
OUT
will remain undefined until V
IN
rises
above V
IN
MIN
, at which time the output will become
valid. V
OUT
will be in its active low state while V
IN
MIN
<
V
IN
< V
DET
+. (V
DET
+
= V
DET
- + V
HYST
). If and when
the input rises above V
DET
+, the output will assume its
inactive state. (High for TC54VC, open-drain for
TC54VN).
FIGURE 3-1:
TIMING DIAGRAM
4.0
APPLICATIONS INFORMATION
Refer to Microchip Technology Application Note #779,
Using the TC54 Voltage Detector.
V
IN
Detect Voltage V
DET
-
Minimum Operating
Voltage
V
HYST
V
DET
+
Output Voltage
Release Voltage
or RESET Voltage
Ground Level
Ground Level
V
OUT
2002 Microchip Technology Inc.
DS21434C-page 5
TC54
5.0
PACKAGING INFORMATION
5.1
Package Marking Information
Symbol
Output
Voltage
B
CMOS
1.
C
CMOS
2.
D
CMOS
3.
E
CMOS
4.
F
CMOS
5.
H
CMOS
6.
Symbol
Output
Voltage
L
Nch
1.
M
Nch
2.
N
Nch
3.
P
Nch
4.
R
Nch
5.
S
Nch
6.
T
Nch
7.
1
represents output configuration (CMOS or Nch)
and first integer of voltage
Ex: CMOS 3.x =
D
2
represents first decimal of output voltage (0-9)
Ex: CMOS 3.x =
D 4
4
3
represents assembly lot code
&
Symbol
Output
Voltage
T
Nch
7.
Symbol
Voltage
0
.0
1
.1
2
.2
3
.3
4
.4
5
.5
6
.6
7
.7
8
.8
9
.9
3
1
represents output configuration and first integer
of voltage
2
represents first decimal of output voltage
4
3
represents assembly lot code
&
TC54
DS21434C-page 6
2002 Microchip Technology Inc.
5.2
Taping Form
Component Taping Orientation for 3-Pin SOT-23A (EIAJ SC-59) Devices
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
3-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
for TR Suffix Device
(Mark Right Side Up)
W
P
Component Taping Orientation for 3-Pin SOT-89 Devices
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
3-Pin SOT-89
12 mm
8 mm
1000
7 in
Carrier Tape, Reel Size, and Number of Components Per Reel
User Direction of Feed
Device
Marking
PIN 1
Standard Reel Component Orientation
for TR Suffix Device
(Mark Right Side Up)
W
P
2002 Microchip Technology Inc.
DS21434C-page 7
TC54
5.2 Taping Form (Continued)
5.3
Package Dimensions
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
.071 (1.80)
.055 (1.40)
PIN 1
.118 (3.00)
.098 (2.50)
.020 (0.50)
.012 (0.30)
.075 (1.90)
REF.
.122 (3.10)
.106 (2.70)
.051 (1.30)
.035 (0.90)
.006 (0.15)
.000 (0.00)
.022 (0.55)
.014 (0.35)
10
MAX.
.010 (0.25)
.004 (0.09)
SOT-23A-3
Dimensions: inches (mm)
TC54
DS21434C-page 8
2002 Microchip Technology Inc.
5.3 Package Dimensions (Continued)
.071 (1.80)
.063 (1.60)
.181 (4.60)
.173 (4.39)
.019 (0.48)
.014 (0.36)
.022 (0.56)
.016 (0.41)
.019 (0.48)
.014 (0.36)
PIN 1
.063 (1.60)
.055 (1.40)
.031 (0.79) MIN.
.102 (2.59)
.090 (2.29)
.167 (4.24)
.017 (0.43)
.014 (0.36)
.063 (1.60)
.055 (1.40)
SOT-89-3
Dimensions: inches (mm)
.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.
DS21434C-page9
TC54
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
TC54V
X
XX
X
X
X
XX
XXX
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
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
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.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.
TC54
DS21434C-page10
2002 Microchip Technology Inc.
NOTES:
2002 Microchip Technology Inc.
DS21434C-page 11
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 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,
K
EE
L
OQ
, microID, MPLAB, MXDEV, PIC, PICmicro,
PICMASTER, PICSTART, PRO MATE, SEEVAL and The
Embedded Control Solutions Company are registered trade-
marks 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.
2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
DS21434C-page 12
2002 Microchip Technology Inc.
M
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