lm27-2plmda National Semiconductor Corporation, lm27-2plmda Datasheet - Page 5

• Manufacturer Part Number: lm27-2plmda
• Description: Accurate, 120 C-150 C Factory Preset Thermostat Lm27 Form
• Manufacturer: National Semiconductor Corporation

Definition of t
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test
conditions.
Note 2: When the input voltage (V
maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5mA to four. Under normal
operating conditions the maximum current that pins 2, 4 or 5 can handle is limited to 5mA each.
Note 3: The human body model is a 100pF capacitor discharge through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin.
Note 4: Typicals are at T
Note 5: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
Note 6: Care should be taken to include the effects of self heating when setting the maximum output load current. Self heating is not included in the trip point
accuracy specification.
Note 7: The 1µA limit is based on a testing limitation and does not reflect the actual performance of the part. Expect to see a doubling of the current for every
15°C increase in temperature. For example, the 1nA typical current at 25°C would increase to 16nA at 85°C.
Note 8: Only connect to one of the output pads, number 2 or number 3, not both. Either push-pull (Pad 2) or open-drain (Pad 3) can be used but they can not
both be used on the same die.
Part Number Template
The series of digits labeled xyz in the part number LM27-xyz MDA, describe the set point value and the function of the output as
follows:
The place holders xy describe the set point temperature as shown in the following table.
The value of z describes the assignment/function of the output as shown in the following table:
For example:
•
•
Active-high open-drain and active-low push-pull options are available, please contact National Semiconductor for more information.
The part number LM27-2SL MDA would have T
The part number LM27-ZLN MDA would have T
x (10x)
-
-
-
-
-
-
-
Value of z
N
L
J
= T
ENABLE
y (1x)
A
= 25°C and represent most likely parametric norm.
H
N
R
K
L
P
J
I
) at any pin exceeds the power supply (V
Temperature (°C)
20153024
Digital Output Function
Overtemperature shutdown: active-high OS output or active-low OS output
Undertemperature shutdown: active-high US or active-low US output.
0
1
2
3
4
5
6
OS
US
= 147°C, and is programmed as an overtemperature shutdown output.
= 123°C, and is programmed as an undertemperature shutdown output.
I
< GND or V
5
I
> V
x (10x)
+
), the current at that pin should be limited to 5mA. The 20mA
Z
1
2
3
-
-
-
y (1x)
S
V
T
-
-
-
-
Temperature (°C)
12
13
14
15
7
8
9
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