TC54_11 Datasheet, PDF (1/20 Pages) Microchip Technology – CMOS voltage detectors that are especially well suited for battery-powered

Voltage Detector
TC54
Features
• ±2.0% Detection Thresholds
• Small Packages: 3-Pin SOT-23A, SOT-89, and
TO-92
• Low Current Drain: 1 µA, typical
• Wide Detection Range: 1.1V to 6.0V
• 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
TC54VC only
V_IN
–
V_OUT
+
V_REF
V_SS
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 6.0V with a 2% tolerance.
The TC54 is available with either an open-drain or com-
plementary output stage. During operation, the 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, when it resets to a logic-
high state.
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
1 23
TC54VN has open-drain output.
TC54VC has complementary (push-pull) output.
V_OUT V_IN V_SS
Note: 3-Pin SOT-23A is equivalent to the
EIAJ SC-59.
Device Features
Device
Output
Type
State
Reset Delay
Std. Trip Points⁽¹⁾ (typical)
TC54VN
Open-Drain
Active Low
No
1.4V, 2.1V, 2.7V, 2.9V
TC54VC
Push-Pull
Active Low
No
3.0V, 4.2V, 4.3V
Note 1: Custom Trip Points available. Minimum order requirement. Information available upon request.
 2001-2011 Microchip Technology Inc.
DS21434J-page 1