TS3809/3810 Series
Microprocessor Reset Circuit
1/7
Version: C07
SOT-23
General Description
The TS3809/3810 series are used for microprocessor (P) supervisory circuits to monitor the power supplies in P
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 VCC supply voltage declines below a
preset threshold, keeping it asserted for at least 200ms after VCC 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 have an active low RESET output, while the TS3810 has an active high RESET output The
reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct
logic state for VCC down to 1.0V. Low supply current makes TS3809/3810 series ideal for use in portable equipment.
Ordering Information
Note: x is the threshold voltage type, option as:
A : 4.63V
B : 4.38V
C : 4.00V
D : 3.08V
E : 2.93V
F : 2.63V
G : 2.25V
Part No.
Package
Packing
TS3809CXx RF
SOT-23
3Kpcs / 7” Reel
TS3810CXx RF
SOT-23
3Kpcs / 7” Reel
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
●
25S supply current
●
Guaranteed reset valid to Vcc=+1V
●
Power supply transient immunity
Applications
●
Battery-operated systems and Controllers
●
Intelligent instruments
●
Critical uP and uC power monitoring
●
Portable / Battery powered equipment
●
Automotive
Typical Application Circuit
Absolute Maximum Rating
Parameter
Symbol
Maximum
Unit
Terminal Voltage (with respect to Gnd)
VCC
GND - 0.3 to GND +6.5
V
RESET & (RESET) push-pull
VRESET
GND - 0.3 to VCC +0.3
V
Input Current, VCC
ICC
20
mA
Output Current, RESET, (RESET)
IO
5
mA
Power Dissipation
PD
(TJ-TA)/θJA
mW
Operating Junction Temperature Range
TJ.OPR
-40 ~ +125
oC
Storage Temperature Range
TSTG
-65 ~ +150
oC
Lead Soldering Temperature (260
oC)
TLEAD
10
S
Pin Definition:
TS3809
TS3810
1. GND
2. RESET
2. (RESET)
3. VCC