1

Motorola Small–Signal Transistors, FETs and Diodes Device Data

Bias Resistor Transistor

PNP Silicon Surface Mount Transistor with

Monolithic Bias Resistor Network

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

• The SOT-23 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.

Replace “T1” with “T3” in the Device Number to order

the 13 inch/10,000 unit reel.

Rating

Symbol

Value

Unit

Collector-Base Voltage

VCBO

50

Vdc

Collector-Emitter Voltage

VCEO

50

Vdc

Collector Current

IC

100

mAdc

Total Power Dissipation @ TA = 25°C(1)

Derate above 25

°C

PD

1.6

mW

mW/

°C

THERMAL CHARACTERISTICS

Rating

Symbol

Value

Unit

Thermal Resistance — Junction-to-Ambient (surface mounted)

R

θJA

625

°C/W

Operating and Storage Temperature Range

TJ, Tstg

– 65 to +150

°C

Maximum Temperature for Soldering Purposes,

Time in Solder Bath

TL

260

10

°C

Sec

DEVICE MARKING AND RESISTOR VALUES

Device

Marking

R1 (K)

R2 (K)

MMUN2111LT1

MMUN2112LT1

MMUN2113LT1

MMUN2114LT1

MMUN2115LT1(2)

A6A

A6B

A6C

A6D

A6E

10

22

47

10

10

10

22

47

47

∞

1. Device mounted on a FR-4 glass epoxy printed circuit board using the minimum recommended footprint.

2. New devices. Updated curves to follow in subsequent data sheets.

Thermal Clad is a trademark of the Bergquist Company

Preferred devices are Motorola recommended choices for future use and best overall value.

(Replaces MMUN2111T1/D)

Order this document

by MMUN2111LT1/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

© Motorola, Inc. 1996

MMUN2111LT1

SERIES

PNP SILICON

BIAS RESISTOR

TRANSISTOR

Motorola Preferred Devices

CASE 318-08, STYLE 6

SOT-23 (TO-236AB)

1

2

3

PIN 3

COLLECTOR

(OUTPUT)

PIN 2

EMITTER

(GROUND)

PIN 1

BASE

(INPUT)

R1

R2