LMUN2237LT1 datasheet(1/4 Pages) LRC | Bias Resistor Transistors NPN Silicon Surface Mount Transistors with Monolithic Bias Resistor Network

Part No.	LMUN2237LT1

Description	Bias Resistor Transistors NPN Silicon Surface Mount Transistors with Monolithic Bias Resistor Network

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Manufacturer	LRC [Leshan Radio Company]

Direct Link	http://www.lrc.cn/

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This new series of digital transistors is designed to replace a single

device and its external resistor bias network. The BRT (Bias Resistor

Transistor) contains a single transistor with a monolithic bias network

consisting of two resistors; a series base resistor and a base–emitter

resistor.

The BRT eliminates these individual components by

integrating them into a single device. The use of a BRT can reduce

both system cost and board space. The device is housed in the SOT-23

package which is designed for low power surface mount applications.

• Simplifies Circuit Design

• Reduces Board Space

• Reduces Component Count

ESD Rating –

MAXIMUM RATINGS (TA = 25°C unless otherwise noted)

Rating

Symbol

Value

Unit

Collector-Base Voltage

VCBO

50

Vdc

Collector-Emitter Voltage

VCEO

50

Vdc

Collector Current

IC

100

mAdc

THERMAL CHARACTERISTICS

Characteristic

Symbol

Max

Unit

Total Device Dissipation

TA = 25°C

Derate above 25

°C

PD

230 (Note 1)

338 (Note 2)

1.8 (Note 1)

2.7 (Note 2)

mW

°C/W

Thermal Resistance –

Junction-to-Ambient

RθJA

540 (Note 1)

370 (Note 2)

°C/W

Thermal Resistance –

Junction-to-Lead

RθJL

264 (Note 1)

287 (Note 2)

°C/W

Junction and Storage

Temperature Range

TJ, Tstg

–55 to +150

°C

1. FR–4 @ Minimum Pad

2. FR–4 @ 1.0 x 1.0 inch Pad

PIN 3

COLLECTOR

(OUTPUT)

PIN 1

EMITTER

(GROUND)

PIN 2

BASE

(INPUT)

R1

R2

LESHAN RADIO COMPANY, LTD.

LMUN2237LT1

CASE 318–08, STYLE 6

SOT– 23 (TO–236AB)

Bias Resistor Transistors

NPN Silicon Surface Mount Transistors

with Monolithic Bias Resistor Network

LMUN2237LT1-1/4

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