LESHAN RADIO COMPANY, LTD.

LMUN5211T1 Series–1/10

Bias Resistor Transistor

NPN Silicon Surface Mount Transistor

with Monolithic Bias Resistor Network

2

3

1

LMUN5211T1

SERIES

PIN 1

BASE

(INPUT)

PIN 3

COLLECTOR

(OUTPUT)

PIN 2

EMITTER

(GROUND)

R

1

R

2

MARKINGDIAGRAM

8X

M

8x = Specific Device Code

x = (See Marking Table)

M= Date Code

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 con-

sisting 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 SC–70/SOT–323 package which is

designed for low power surface mount applications.

• Simplifies Circuit Design

• Reduces Board Space

• Reduces Component Count

• The SC–70/SOT–323 package can be soldered using wave or

reflow. The modified gull–winged leads absorb thermal stress

during soldering eliminating the possibility of damage to the die.

• Available in 8 mm embossed tape and reel

Use the Device Number to order the 7 inch/3000 unit reel.

DEVICE MARKING INFORMATION

See specific marking information in the device marking table on page 2

of this data sheet.

Rating

Symbol

Value

Unit

Collector-Base Voltage

V

CBO

50

Vdc

Collector-Emitter Voltage

V

CEO

50

Vdc

Collector Current

I

C

100

mAdc

THERMAL CHARACTERISTICS

Characteristic

Symbol

Max

Unit

Total Device Dissipation

Derate above 25

°C

P

D

202 (Note 1.)

310 (Note 2.)

1.6 (Note 1.)

2.5 (Note 2.)

mW

mW/

°C

Thermal Resistance –

Junction-to-Ambient

618 (Note 1.)

403 (Note 2.)

°C/W

Thermal Resistance –

Junction-to-Lead

280 (Note 1.)

332 (Note 2.)

°C/W

Junction and Storage

Temperature Range

T

J

–55 to +150

°C

1. FR–4 @ Minimum Pad

2. FR–4 @ 1.0 x 1.0 inch Pad

SC-70 / SOT-323

• Pb-Free package is available