• Precise Detection Thresholds: Standard ±2.0%,
• Small Packages: 3-Pin SOT-23A, 3-Pin SOT-89,
5-Pin SOT-23A (7.7V only)
www.DataSheet4U.com• Low Current Drain: Typ. 1µA
• Wide Detection Range: 1.1V to 6.0V and 7.7V
• Wide Operating Voltage Range: 0.7V to 10V
• Battery Voltage Monitoring
• Microprocessor Reset
• System Brown-out Protection
• Switching Circuit in Battery Backup
• Level Discriminator
Device Selection Table
TC54-xxxxxxxxxxx 3-Pin SOT-23A -40°C to +85°C
TC54-xxxxxxxxxxx 3-Pin SOT-89 -40°C to +85°C
TC54-xxxxxxxxxxx 5-Pin SOT-23A -40°C to +85°C
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
VOUT VIN VSS
VOUT VIN VSS
NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59.
5-Pin SOT-23A is equivalent to the EIAJ SC-74A.
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 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 (VOUT) remains in the
logic HIGH state as long as VIN is greater than the
specified threshold voltage (VDET -). When VIN falls
below VDET - the output is driven to a logic LOW. VOUT
remains LOW until VIN rises above VDET - by an
amount VHYST, whereupon it resets to a logic HIGH.
Functional Block Diagram
2 TC54VC only
TC54VN has open-drain output.
TC54VC has complementary output.
2002 Microchip Technology Inc.