TC54
Voltage Detector
Features General Description
Precise Detection Thresholds: Standard 2.0%, The TC54 series are CMOS voltage detectors that are
Custom 1.0% especially well suited for battery-powered applications
because of their extremely low 1 A operating current
Small Packages: 3-Pin SOT-23A, 3-Pin SOT-89,
and small surface-mount packaging. Each part is laser-
TO-92 and 5-Pin SOT-23A (7.7V only)
trimmed to the desired threshold voltage, which can be
Low Current Drain: Typ. 1 A
specified from 1.4V to 7.7V for a 2% tolerance and from
Wide Detection Range: 1.1V to 6.0V and 7.7V
1.5V to 6.0V for a 1% tolerance.
Wide Operating Voltage Range: 0.7V to 10V
The device includes a comparator, low-current high-
precision reference, laser-trimmed divider, hysteresis
Applications
circuit and output driver. The TC54 is available with
either an open-drain or complementary output stage.
Battery Voltage Monitoring
Microprocessor Reset ) remains in
During operation, the TC54's output (V
OUT
the logic-high state as long as V is greater than the
System Brown-Out Protection IN
specified threshold voltage (V ). When V falls
DET IN
Switching Circuit in Battery Backup
below V , the output is driven to a logic-low. V
DET OUT
Level Discriminator
remains low until V rises above V by an amount
IN DET
V , whereupon it resets to a logic-high.
HYST
Functional Block Diagram
TC54VC only
Package Types
2
V
IN
3-Pin SOT-23A 3-Pin SOT-89
V
IN
V
IN
V 3
OUT
1
+
TC54
TC54
12
1 2 3
V V
V V V
V OUT SS
OUT IN SS
REF
V
SS
3
3-Pin TO-92 5-Pin SOT-23A
NC NC
TC54VN has open-drain output.
TC54VC has complementary output.
12 3
5 4
TC54
1 2 3
V V V
OUT IN SS VV V VV
OUOUTT IN SSSS
Note: 3-Pin SOT-23A is equivalent to the
EIAJ SC-59
5-Pin SOT-23A is equivalent to the
EIAJ SC-74A. (7.7V ONLY)
2004 Microchip Technology Inc. DS21434G-page 1TC54
Stresses above those listed underAbsolute Maximum
1.0 ELECTRICAL
Rating may cause permanent damage to the device. These
CHARACTERISTICS
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.
Absolute Maximum Ratings
Exposure to Absolute Maximum Rating conditions for
Input Voltage ...................................................................+12V
extended periods may affect device reliability.
Output Current ..............................................................50 mA
Output Voltage: CMOS................(V 0.3V) to (V + 0.3V)
SS IN PIN FUNCTION TABLE
Open-Drain.....................(V 0.3V) to 12V
SS
Power Dissipation (T 70C):
Symbol Description
A
3-Pin SOT-23A .......................................................240 mW
V Digital Output
OUT
3-Pin SOT-89..........................................................500 mW
5-Pin SOT-23A .......................................................240 mW
V Analog Input
IN
3-Pin TO-92 ............................................................300 mW
V Ground Terminal
SS
Operating Temperature Range........................-40C to +85C
NC No Connect
Storage Temperature Range.........................-65C to +150C
NC No Connect
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, T = +25C.
A
Parameter Sym Min Typ Max Units Test Conditions
Operating Voltage V 0.7 10.0 V (V ) = 0.8 to 6.0V
IN DET
Quiescent Current I 0.8 2.7 AV = 2.0V
SS IN
0.9 3.0 V = 3.0V
IN
1.0 3.2 V = 4.0V
IN
1.1 3.6 V = 5.0V
IN
Threshold Voltage V 1.37 1.4 1.43 V TC54VX14
DET
(Note 1)
2.06 2.1 2.14 TC54VX21
2.65 2.7 2.75 TC54VX27
2.84 2.9 2.96 TC54VX29
2.94 3.0 3.06 TC54VX30
4.12 4.2 4.28 TC54VX42
4.21 4.3 4.39 TC54VX43
7.54 7.7 7.86 TC54VX77 (5-pin SOT-23A only)
Hysteresis Voltage V 28 70 112 mV V = 1.4V (typ)
HYST DET
42 105 168 V = 2.1V (typ)
DET
54 135 216 V = 2.7V (typ)
DET
58 145 232 V = 2.9V (typ)
DET
60 150 240 V = 3.0V (typ)
DET
84 210 336 V = 4.2V (typ)
DET
86 215 344 V = 4.3V (typ)
DET
154 385 616 V = 7.7V (typ)
DET
Output Current I 7.7 mAV = 0.5V, V = 2.1V
OUT OL IN
10.1 V = 3.0V
IN
11.5 V = 4.0V
IN
13.0 V = 5.0V
IN
-10.0 TC54VC Only:
V = V 2.1V, V = 8.0V
OH IN IN
Tempco of (V ) T (V ) 100 ppm/C -40C T 85C
DET C DET A
Delay Time t 0.2 msV V inversion
DLY DET OUT
Note 1: For other voltage options, please contact your regional Microchip sales office.
DS21434G-page 2 2004 Microchip Technology Inc.