lm27-2plmda National Semiconductor Corporation, lm27-2plmda Datasheet - Page 3

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

Pin Descriptions
Note: Only connect to one of the output pads, Pad 2 or Pad 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.
Pin Number
(Note 8)
(Note 8)
BACK
7 - 14
1
2
3
4
5
6
Pin Name
Backside
HYST
V
GND
OS
OS
NC
US
US
TEMP
V
+
Hysteresis control, digital input
Overtemperature Shutdown push-
pull active-high thermostat digital
output
Undertemperature Shutdown push-
pull active-high thermostat digital
output
Overtemperature Shutdown open-
drain active-low thermostat digital
output
Undertemperature Shutdown open-
drain active low thermostat digital
output
Supply input
Power supply ground
Analog output voltage proportional to
temperature
Function
3
GND for 10°C or V
Controller interrupt, system or power supply shutdown
System or power supply shutdown
Controller interrupt, system or power supply shutdown;
pull-up resistor
System or power supply shutdown; pull-up resistor
10kΩ
2.7V to 5.5V with a 0.1µF bypass capacitor. For PSRR
information see Section Titled NOISE
CONSIDERATIONS.
System ground
Leave floating or connect to a high impedance node.
Do not connect
Can go to GND connection (Note: GND must be
connected. The back is not a system ground connection).
≥
10kΩ
+
for 2°C
Connection
www.national.com
≥