LESHAN RADIO COMPANY, LTD.
Bias Resistor Transistor
ULN2M21U1LNT12S2e1r1ieLsT1
NPN Silicon Surface Mount Transistor
with Monolithic Bias Resistor Network
SERIES
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.
3
1
2
SOT–23 (TO–236AB)
PIN 3
• Simplifies Circuit Design
COLLECTOR
(OUTPUT)
R1
R2
PIN 1
• Reduces Board Space and Component Count
BASE
(INPUT)
• 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.
PIN 2
EMITTER
(GROUND)
• 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 the13 inch/10,000 unit reel.
MAXIMUM RATINGS (T = 25°C unless otherwise noted)
A
Rating
Collector-Base Voltage
Collector-Emitter Voltage
Collector Current
Symbol
VCBO
VCEO
IC
Value
50
Unit
Vdc
• Pb−Free Package May be Available.
Pb−Free
The G−Suffix Denotes a
Lead Finish
50
Vdc
100
mAdc
Total Power Dissipation @ TA = 25°C
(Note 1.) Derate above 25°C
PD
*246
1.5
mW
°C/W
ORDERING INFORMATION
Device
Package
LMUN2211LT1G SOT–23
LMUN2212LT1G SOT–23
LMUN2213LT1G SOT–23
LMUN2214LT1G SOT–23
LMUN2215LT1G SOT–23
LMUN2216LT1G SOT–23
LMUN2230LT1G SOT–23
LMUN2231LT1G SOT–23
LMUN2232LT1G SOT–23
LMUN2233LT1G SOT–23
LMUN2234LT1G SOT–23
LMUN2235LT1G SOT–23
LMUN2238LT1G SOT–23
LMUN2241LT1G SOT–23
Shipping
DEVICE MARKING AND RESISTOR VALUES
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
3000/Tape & Reel
Device
Marking
A8A
A8B
A8C
A8D
A8E
A8F
R1(K)
10
R2(K)
10
22
47
47
∞
LMUN2211LT1
LMUN2212LT1
LMUN2213LT1
LMUN2214LT1
LMUN2215LT1
LMUN2216LT1
LMUN2230LT1
LMUN2231LT1
LMUN2232LT1
LMUN2233LT1
LMUN2234LT1
LMUN2235LT1
LMUN2238LT1
LMUN2241LT1
22
47
10
10
4.7
1.0
2.2
4.7
4.7
22
∞
A8G
A8H
A8J
1.0
2.2
4.7
47
47
47
∞
A8K
A8L
A8M
A8R
A8U
2.2
2.2
100
∞
1. Device mounted on a FR-4 glass epoxy printed circuit board using the
minimum recommended footprint.
LMUN2211S-1/11