LESHAN RADIO COMPANY, LTD.
Bias Resistor Transistor
MMUN2111RLT1
MMUN2112RLT1
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 transis-
tor 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
MMUN2113RLT1
MMUN2114RLT1
MMUN2115RLT1
MMUN2116RLT1
MMUN2130RLT1
MMUN2131RLT1
MMUN2132RLT1
MMUN2133RLT1
MMUN2134RLT1
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.
PNP SILICON
BIAS RESISTOR
TRANSISTOR
Replace “T1” with “T3” in the Device Number to order
the 13 inch/10,000 unit reel
3
PIN3
Collector
PIN1
base
R1
(output)
1
(Input)
R2
2
PIN2
Emitter
(Ground)
CASE 318–08, STYLE 6
SOT– 23 (TO–236AB)
MAXIMUM RATINGS (T A = 25°C unless otherwise noted)
Rating
Symbol
Value
50
Unit
Vdc
Collector-Base Voltage
VCBO
V CEO
IC
Collector-Emitter Voltage
50
Vdc
Collector Current
Total Power Dissipation @ T A = 25°C(1)
100
200
1.6
mAdc
mW
P D
Derate above 25°C
mW/°C
THERMAL CHARACTERISTICS
Rating
Symbol
R θ JA
Value
Unit
Thermal Resistance — Junction-to-Ambient (surface mounted)
Operating and Storage Temperature Range
Maximum Temperature for Soldering Purposes
Time in Solder Bath
625
°C/W
T J , T stg
–65 to +150
°C
°C
260
10
T L
Sec
DEVICE MARKING AND RESISTOR VALUES
Device
Marking
A6A
R1 (K)
R2 (K)
MMUN2111LT1
MMUN2112LT1
MMUN2113LT1
MMUN2114LT1
MMUN2115LT1(2)
10
22
47
10
10
10
22
47
47
A6B
A6C
A6D
A6E
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.
Q1–1/7