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TC54
VOLTAGE DETECTOR
FEATURES
s
s
s
s
s
Precise Detection Thresholds .... Standard
鹵
2.0%
Custom
鹵
1.0%
Small Packages ........... SOT-23A-3, SOT-89, TO-92
Low Current Drain ..................................... Typ. 1
碌
A
Wide Detection Range .......................... 2.1V to 6.0V
Wide Operating Voltage Range ............ 1.5V to 10V
GENERAL DESCRIPTION
The TC54 Series are CMOS voltage detectors, suited
especially for battery-powered applications because of their
extremely low 1碌A(chǔ) operating current and small surface-
mount packaging. Each part is laser trimmed to the desired
threshold voltage which can be specified from 2.1V to 6.0V,
in 0.1V steps.
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
鈥?/div>
specified threshold voltage (V
DET
). When V
IN
falls below
V
鈥?/div>
, the output is driven to a logic LOW. V
OUT
remains
DET
LOW until V
IN
rises above V
鈥?/div>
DET
by an amount V
HYST
,
whereupon it resets to a logic HIGH.
2
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5
6
7
APPLICATIONS
s
s
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s
s
Battery Voltage Monitoring
Microprocessor Reset
System Brownout Protection
Switching Circuit in Battery Backup
Level Discriminator
PIN CONFIGURATIONS
*SOT-23A-3
VIN
2
1 2 3
SOT-89-3
TO-92
ORDERING INFORMATION
PART CODE TC54 V X XX X X X XX XXX
Output form:
N = Nch Open Drain
C = CMOS Output
Detected Voltage:
Ex: 21 = 2.1V; 60 = 6.0V
Extra Feature Code:
Fixed: 0
Tolerance:
1 =
鹵
1.0% (custom)
2 =
鹵
2.0% (standard)
TC54VC only
TC54
3
VSS
TC54
1
VOUT
2
VIN
3
VSS
TC54
1
VOUT
VOUT
VIN
*SOT-23A-3 is equivalent to EIAJ (SC-59)
FUNCTIONAL BLOCK DIAGRAM
2
VIN
VSS
Temperature:
E: 鈥?40擄C to + 85擄C
Package Type and Pin Count:
CB: SOT-23A-3*, MB: SOT-89-3, ZB: TO-92-3
鈥?/div>
+
VOUT
1
Taping Direction:
Standard Taping
Reverse Taping
No suffix: TO-92 Bulk
*SOT-23A-3 is equivalent to EIAJ (SC-59).
VREF
VSS
3
TC54VN has open-drain output.
TC54VC has complementary output.
TC54-10 11/8/96
8
4-279
TELCOM SEMICONDUCTOR, INC.
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