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
●
●
●
●
●
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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
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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
TS3809/3810 Series
Taiwan Semiconductor
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Terminal Voltage (with respect to GND)
RESET & (RESET) push-pull
Input Current, V
CC
Output Current, RESET, (RESET)
Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260 C)
o
SYMBOL
V
CC
V
RESET
I
CC
I
O
P
D
T
J.OPR
T
STG
T
LEAD
LIMIT
GND - 0.3 to GND +6.5
GND - 0.3 to V
CC
+0.3
20
5
(T
J
-T
A
)/R
θJA
-40 ~ +125
-65 ~ +150
10
UNIT
V
V
mA
mA
mW
o
o
C
C
s
THERMAL PERFORMANCE
PARAMETER
Thermal Resistance from Junction to Case
Thermal Resistance from Junction to Ambient
(Note 1)
SYMBOL
R
θJC
R
θJA
MAXIMUM
110
250
UNIT
ºC/W
ºC/W
ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, T
A
= 25°C unless otherwise noted)
PARAMETER
Input Supply Voltage
Supply Current
CONDITIONS
T
A
=-40 C~+85 C
V
CC
=V
TH
+ 1V
TS3809/3810CXA
TS3809/3810CXB
TS3809/3810CXC
Reset Threshold
TS3809/3810CXD
TS3809/3810CXE
TS3809/3810CXF
TS3809/3810CXG
Reset Threshold
Temperature Coefficient
Set-up Time
V
CC
to Reset Delay
Reset Active Timeout
Period
RESET Output (TS3809)
Voltage Low
RESET Output (TS3809)
Voltage High
(RESET) Output (TS3810)
Voltage Low
T
A
=0~+85ºC
V
CC
= 0 ~ (V
TH
- 100mV)
V
CC
= V
TH
~ (V
TH
- 100mV)
T
A
=0~+85ºC
1.8V<V
CC
<V
TH(MAX)
,
I
SINK
=1.2mA
1.2V<V
CC
<1.8V,
I
SINK
=50µA
V
CC
> V
TH(MAX)
,
I
SOURCE
=500µA
V
CC
> V
TH(MAX)
, I
SINK
=1.2mA
V
OH
V
OL
0.8 V
CC
--
--
--
--
0.3
V
V
V
OL
--
--
0.3
V
V
THT
T
SET
T
RD
T
DELAY
V
TH
o
o
SYMBOL
V
CC
I
CC
MIN
1.0
--
4.54
4.29
3.92
3.02
2.87
2.57
2.20
--
1
--
140
TYP
--
25
4.63
4.38
4.00
3.08
2.93
2.63
2.25
50
--
20
200
MAX
6
35
4.71
4.46
4.08
3.15
3.00
2.69
2.30
--
--
--
260
UNIT
V
µA
V
ppm/ C
µs
µs
ms
o
Document Number: DS_P0000206
2
Version: E15
TS3809/3810 Series
Taiwan Semiconductor
CHARACTERISTICS CURVES
(T
C
= 25°C unless otherwise noted)
Figure 1. Threshold Voltage vs. Temperature
Figure 2. T
DELAY
vs. Temperature
Figure 3. Supply Current vs. Temperature
Figure 4. Supply Current vs. Threshold Voltage
Figure 5. Power-Down T
DELAY
vs. Temperature
Figure 6. Output Voltage vs. Output Current
Document Number: DS_P0000206
5
Version: E15
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