TC51N2702ECBTR Datasheet, PDF (1/14 Pages) Microchip Technology – 1UA Voltage Detector with Output Delay

M
TC51
1µA Voltage Detector with Output Delay
Features
• Precise Detection Thresholds: ±2.0%
• Small Package: 3-Pin SOT-23A
• Low Supply Current: Typ. 1µA
• Wide Detection Range: 1.6V to 6.0V
• Wide Operating Voltage Range: 0.7V to 10V
• Built-in Delay Circuit: 50msec to 200 msec
• Open-Drain Output
Applications
• Battery Voltage Monitoring
• Microprocessor Reset
• System Brown-out Protection
Device Selection Table
Part Number
Package
Temp. Range
TC51-xxxxxxxxxx 3-Pin SOT-23A -40°C to +85°C
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
3-Pin SOT-23A
V_IN
3
TC51
1
2
V_OUT
V_SS
NOTE: 3-Pin SOT-23A is equivalent to the EIAJ SC-59.
General Description
The TC51 is a very low power, open drain output,
CMOS voltage detector with built-in delay. It is
particularly well-suited for battery powered applications
because of its 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 1.6V to 6.0V. The standard built-in
output delay is 50msec-200msec.
The device includes a comparator, low-current high-
precision reference, laser-programmed voltage divider,
hysteresis circuit and output driver with digital delay
timer.
In operation, the TC51’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 immediately driven to a logic
LOW. V_OUT remains LOW until V_IN rises above V_DET -
by an amount V_HYST, whereupon it returns to a logic
HIGH after expiration of the built-in delay time.
Functional Block Diagram
V_IN
V_OUT
V_REF
Delay
Circuit
V_SS
 2002 Microchip Technology Inc.
DS21429B-page 1