TS3809_15 Datasheet, PDF (1/8 Pages) Taiwan Semiconductor Company, Ltd – Microprocessor Reset Circuit

TS3809/3810 Series
Taiwan Semiconductor
Microprocessor Reset Circuit
GENERAL DESCRIPTION
The TS3809/3810 series are used for microprocessor
(µP) supervisory circuits to monitor the power supplies
in µP and digital systems. They provide excellent circuit
reliability and low cost by eliminating external
components and adjustments when used with +5V,
+3.3V, +3.0V, +2.5V powered circuits.
These circuits perform a single function: they assert a
reset signal whenever the V_CC supply voltage declines
below a preset threshold, keeping it asserted for at least
200ms after V_CC has risen above the reset threshold.
Reset thresholds suitable for operation with a variety of
supply voltages are available. TS3809/3810 series have
push pull outputs. TS3809 series has an active low
RESET output, while the TS3810 has an active high
RESET output The reset comparator is designed to
ignore fast transients on V_CC, and the outputs are
guaranteed to be in the correct logic state for V_CC down
to 1.0V. Low supply current makes TS3809/3810 series
ideal for use in portable equipment.
FEATURES
● High Accurate ±2%
● Precision monitoring of +3V, +3.3V, and +5V
Power supply voltage
● Fully specified over temperature
● Available in three output configurations
● Push-Pull RESET low output (TS3809)
● Push-Pull (RESET) high output (TS3810)
● 200ms typ. Power-on reset pulse width
● 25µs supply current
● Guaranteed reset valid to V_CC=+1V
● Power supply transient immunity
APPLICATION
● Battery-operated systems and controllers
● Intelligent instruments
● Critical µP and µC power monitoring
● Portable / Battery powered equipment
● Automotive
SOT-23
Pin Definition
TS3809
TS3810
1. GND
1. GND
2. RESET 2. (RESET)
3. VCC
3. VCC
TYPICAL APPLICATIN CIRCUIT
Document Number: DS_P0000206
1
Version: E15