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TelCom Semiconductor - VOLTAGE DETECTOR

Numéro de référence TC54xxxx
Description VOLTAGE DETECTOR
Fabricant TelCom Semiconductor 
Logo TelCom Semiconductor 





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TC54xxxx fiche technique
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TC54
VOLTAGE DETECTOR
FEATURES
s Precise Detection Thresholds .... Standard ± 2.0%
Custom ± 1.0%
s Small Packages ........... SOT-23A-3, SOT-89, TO-92
s Low Current Drain ..................................... Typ. 1µA
s Wide Detection Range .......................... 2.1V to 6.0V
s Wide Operating Voltage Range ............ 1.5V to 10V
APPLICATIONS
s Battery Voltage Monitoring
s Microprocessor Reset
s System Brownout Protection
s Switching Circuit in Battery Backup
s Level Discriminator
PIN CONFIGURATIONS
*SOT-23A-3
VIN
2
SOT-89-3
TO-92
1 23
TC54
1
VOUT
3
VSS
TC54
1
VOUT
2
VIN
3
VSS
TC54
*SOT-23A-3 is equivalent to EIAJ (SC-59)
FUNCTIONAL BLOCK DIAGRAM
2
VIN
+
TC54VC only
VOUT
1
GENERAL DESCRIPTION
The TC54 Series are CMOS voltage detectors, suited
especially for battery-powered applications because of their
extremely low 1µA 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 (VOUT) remains in the
logic HIGH state as long as VIN is greater than the
specified threshold voltage (VD–ET). When VIN falls below
V–DET, the output is driven to a logic LOW. VOUT remains
LOW until VIN rises above V–DET by an amount VHYST,
whereupon it resets to a logic HIGH.
2
3
4
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 = ± 1.0% (custom)
2 = ± 2.0% (standard)
Temperature: E: – 40°C to + 85°C
Package Type and Pin Count:
CB: SOT-23A-3*, MB: SOT-89-3, ZB: TO-92-3
Taping Direction:
Standard Taping
Reverse Taping
No suffix: TO-92 Bulk
*SOT-23A-3 is equivalent to EIAJ (SC-59).
5
6
7
VREF
TC54VN has open-drain output.
TC54VC has complementary output.
VSS
3
TELCOM SEMICONDUCTOR, INC.
TC54-10 11/8/96
4-279
8

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