LESHAN RADIO COMPANY, LTD.
Bias Resistor Transistors
LMUN2111LT1
PNP Silicon Surface Mount Transistors
with Monolithic Bias Resistor Network
SERIES
3
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.
1
2
SOT-23
PIN 3
COLLECTOR
(OUTPUT)
R1
R2
PIN 1
• Simplifies Circuit Design
• Reduces Board Space
• Reduces Component Count
BASE
(INPUT)
PIN 2
EMITTER
(GROUND)
• 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.
MARKINGDIAGRAM
• 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.
A6x
M
MAXIMUM RATINGS (TA = 25°C unless otherwise noted)
A6x = Device Marking
Rating
Collector-Base Voltage
Collector-Emitter Voltage
Collector Current
Symbol
VCBO
VCEO
IC
Value
50
Unit
Vdc
x
= A – L(See Page 2)
= Date Code
M
50
Vdc
DEVICE MARKING
100
mAdc
INFORMATION
See specific marking information in
THERMAL CHARACTERISTICS
Characteristic
the device marking table on page 2 of this
Symbol
Max
Unit
data sheet.
Total Device Dissipation
TA = 25°C
Derate above 25°C
PD
246 (Note 1.)
400 (Note 2.)
1.5 (Note 1.)
2.0 (Note 2.)
mW
°C/W
°C/W
°C/W
°C
Thermal Resistance –
Junction-to-Ambient
RθJA
508 (Note 1.)
311 (Note 2.)
Thermal Resistance –
Junction-to-Lead
RθJL
174 (Note 1.)
208 (Note 2.)
Junction and Storage
Temperature Range
TJ, T
–55 to +150
stg
1. FR–4 @ Minimum Pad
2. FR–4 @ 1.0 x 1.0 inch Pad
LMUN2111 1/8