Rainbow-electronics LM27 Instrukcja Użytkownika Pobierz pdf (Strona 2)

Ordering Information

For more detailed information on the suffix meaning see the part number template at the end of the Electrical Characteris-

tics Section. Contact National Semiconductor for other set points and output options.

Order Number

Top Mark

NS Package

Number Trip Point Setting Output FunctionBulk Rail 3000 Units in Tape & Reel

LM27CIM5-1HJ LM27CIM5X-1HJ T1HJ MA05B 130˚C Open Drain OS

LM27CIM5-2HJ LM27CIM5X-2HJ T2HJ MA05B 140˚C Open Drain OS

Connection Diagram

20030702

Pin Description

Pin Number Pin Name Function Connection

1 HYST Hysteresis control, digital

input

GND for 10˚C or V

for 2˚C

2 GND Ground, connected to the

back side of the die through

lead frame.

System GND

TEMP

Analog output voltage

proportional to temperature

Leave floating or connect to a high impedance

node.

Supply input 2.7V to 5.5V with a 0.1µF bypass capacitor.

For PSRR information see Section Titled

NOISE CONSIDERATIONS.

5OS

Overtemperature Shutdown

open-drain active low

thermostat digital output

Controller interrupt, system or power supply

shutdown; pull-up resistor ≥ 10kΩ

OS Overtemperature Shutdown

totem-pull active high

thermostat digital output

Controller interrupt, system or power supply

shutdown

Undertemperature Shutdown

open-drain active low

thermostat digital output

System or power supply shutdown; pull-up

resistor ≥ 10kΩ

US Undertemperature Shutdown

totem-pull active high

thermostat digital output

System or power supply shutdown

Note: pin 5 functionality and trip point setting are programmed during LM27 manufacture.

LM27

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