TC54_04 Datasheet, PDF (1/16 Pages) Microchip Technology – Voltage Detector

Voltage Detector
TC54
Features
• Precise Detection Thresholds: Standard ±2.0%,
Custom ±1.0%
• Small Packages: 3-Pin SOT-23A, 3-Pin SOT-89,
TO-92 and 5-Pin SOT-23A (7.7V only)
• Low Current Drain: Typ. 1 µA
• 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
Functional Block Diagram
2
V_IN
TC54VC only
–
V_OUT
1
+
V_REF
V_SS
3
TC54VN has open-drain output.
TC54VC has complementary output.
General Description
The TC54 series are CMOS voltage detectors that are
especially well suited for battery-powered applications
because of their extremely low 1 µA operating current
and small surface-mount packaging. Each part is laser-
trimmed to the desired threshold voltage, which can be
specified from 1.4V to 7.7V for a 2% tolerance and from
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.
During 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.
Package Types
3-Pin SOT-23A
V_IN
3
3-Pin SOT-89
V_IN
TC54
1
2
V_OUT
V_SS
TC54
1 23
V_OUT V_IN V_SS
3-Pin TO-92
123
5-Pin SOT-23A
NC
NC
5
4
TC54
1 23
V_OUT V_IN V_SS
V_OUT V_IN V_SS
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 1