Custom voltages and improved accuracies are available, subject to minimum orders. Contact your local National Semiconductor Sales Office for information.
Pin Descriptions
PIN
(LLP)
1
SOT-23
1
NAME
GND
RESET (LM809)
3
2
RESET (LM810)
5
3
V
CC
Ground reference
Active-low output. RESET remains low while V
CC
is below the reset threshold,
and for 240ms after V
CC
rises above the reset threshold.
Active-high output. RESET remains high while V
CC
is below the reset
threshold, and for 240ms after V
CC
rises above the reset threshold.
Supply Voltage (+5V, +3.3V, or +3.0V)
FUNCTION
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2
LM809/LM810
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
CC
RESET, RESET
Input Current, V
CC
Pin
Output Current, RESET, RESET
Pin
Rate of Rise, V
CC
ESD Rating (Note 2)
−0.3V to 6.0V
−0.3V to (V
CC
+ 0.3V)
20mA
20mA
100V/µs
2kV
Continuous Power Dissipation
(Note 4)
θ
JA
:
LLP-6
SOT23-3
Ambient Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (soldering,
10sec)
320mW
152˚C/W
326˚C/W
−40˚C to +105˚C
125˚C
−65˚C to +160˚C
+300˚C
Electrical Characteristics
V
CC
= full range, T
A
= −40˚C to +105˚C, unless otherwise noted. Typical values are at T
A
= +25˚C, V
CC
= 5V for
4.63/4.38/4.00 versions, V
CC
= 3.3V for 3.08/2.93 versions, and V
CC
= 3V for 2.63/2.45 version (Note 3).
Symbol
Parameter
V
CC
Range
Conditions
T
A
= 0˚C to +70˚C
T
A
= −40˚C to +105˚C
T
A
= −40˚C to
+85˚C
V
CC
<
5.5V, LM8_ _
-4.63/4.38/4.00
V
CC
<
3.6V, LM8_ _
-3.08/2.93/2.63/2.45
T
A
= +85˚C to
+105˚C
V
CC
<
5.5V, LM8_ _
-4.63/4.38/4.00
V
CC
<
3.6V, LM8_ _
-3.08/2.93/2.63/2.45
T
A
= +25˚C
LM8_ _ -4.63
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
T
A
= +25˚C
LM8_ _ -4.38
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
T
A
= +25˚C
LM8_ _ -4.00
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
T
A
= +25˚C
V
TH
Reset Threshold (Note 5)
LM8_ _ -3.08
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
T
A
= +25˚C
LM8_ _ -2.93
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
T
A
= +25˚C
LM8_ _ -2.63
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
T
A
= +25˚C
LM8_ _ -2.45
Reset Threshold
Temperature Coefficient
V
CC
to Reset Delay (Note 5)
Reset Active Timeout Period
V
CC
= V
TH
to (V
TH
− 100mV)
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
140
100
T
A
= −40˚C to +85˚C
T
A
= +85˚C to +105˚C
4.56
4.50
4.40
4.31
4.25
4.16
3.93
3.89
3.80
3.04
3.00
2.92
2.89
2.85
2.78
2.59
2.55
2.50
2.41
2.38
2.33
30
20
240
560
840
2.45
2.63
2.93
3.08
4.00
4.38
4.63
Min
1.0
1.2
18
15
Typ
Max
5.5
5.5
60
50
100
100
4.70
4.75
4.86
4.45
4.50
4.56
4.06
4.10
4.20
3.11
3.15
3.23
2.96
3.00
3.08
2.66
2.70
2.76
2.49
2.52
2.57
ppm/˚C
µs
ms
V
µA
Units
V
I
CC
Supply Current
3
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LM809/LM810
Electrical Characteristics
Symbol
Parameter
(Continued)
V
CC
= full range, T
A
= −40˚C to +105˚C, unless otherwise noted. Typical values are at T
A
= +25˚C, V
CC
= 5V for
4.63/4.38/4.00 versions, V
CC
= 3.3V for 3.08/2.93 versions, and V
CC
= 3V for 2.63/2.45 version (Note 3).
Conditions
V
CC
= V
TH
min, I
SINK
= 1.2mA,
LM809-2.45/2.63/2.93/3.08
V
CC
= V
TH
min, I
SINK
= 3.2mA,
LM809-4.63/4.38/4.00
V
CC
>
1.0V, I
SINK
= 50µA
RESET Output Voltage High
(LM809)
V
CC
>
V
TH
max, I
SOURCE
= 500µA,
LM809-2.45/2.63/2.93/3.08
V
CC
>
V
TH
max, I
SOURCE
= 800µA,
LM809-4.63/4.38/4.00
V
CC
= V
TH
max, I
SINK
= 1.2mA,
LM810-2.63/2.93/3.08
V
CC
= V
TH
max, I
SINK
= 3.2mA,
LM810-4.63/4.38/4.00
1.8V
<
V
CC
<
V
TH
min, I
SOURCE
= 150µA
0.8V
CC
0.8V
CC
V
CC
−1.5
0.3
0.4
V
V
Min
Typ
Max
0.3
0.4
0.3
V
Units
V
OL
RESET Output Voltage Low
(LM809)
V
OH
V
OL
RESET Output Voltage Low
(LM810)
RESET Output Voltage High
(LM810)
V
OH
V
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which the device operates
correctly. Operating ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical
Characteristics.
Note 2:
The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Note 3:
Production testing done at T
A
= +25˚C, over temperature limits guaranteed by design only.
Note 4:
At elevated temperatures, devices must be derated based on package thermal resistance. The device in the SOT23-3 package must be derated at 4mW/˚C
at ambient temperatures above 70˚C. The device has internal thermal protection.
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