MMUN2111LT1 Series
Preferred Devices
Bias Resistor Transistors
PNP Silicon Surface Mount Transistors
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.
http://onsemi.com
PIN 3
COLLECTOR
(OUTPUT)
PIN 1
BASE
(INPUT)
R1
R2
PIN 2
EMITTER
(GROUND)
Features
• Simplifies Circuit Design
• Reduces Board Space
• Reduces Component Count
MARKING
DIAGRAM
• 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.
3
SOT−23
CASE 318
STYLE 6
A6x M G
• Available in 8 mm embossed tape and reel.
• Pb−Free Packages are Available
G
1
2
1
MAXIMUM RATINGS (T = 25°C unless otherwise noted)
A
A6x
x
M
G
= Device Code
= A − L (Refer to page 2)
= Date Code*
Rating
Collector-Base Voltage
Collector-Emitter Voltage
Collector Current
Symbol
Value
50
Unit
Vdc
V
V
CBO
CEO
= Pb−Free Package
50
Vdc
(Note: Microdot may be in either location)
I
100
mAdc
C
*Date Code orientation may vary depending
upon manufacturing location.
THERMAL CHARACTERISTICS
Characteristic
Symbol
Max
Unit
ORDERING INFORMATION
Total Device Dissipation
P
246 (Note 1)
400 (Note 2)
1.5 (Note 1)
2.0 (Note 2)
mW
D
T = 25°C
A
†
Device
Package
Shipping
°C/W
°C/W
°C/W
°C
Derate above 25°C
MMUN21xxLT1
SOT−23
3000/Tape & Reel
MMUN21xxLT1G
SOT−23
3000/Tape & Reel
Thermal Resistance,
Junction-to-Ambient
R
q
508 (Note 1)
311 (Note 2)
JA
(Pb−Free)
MMUN21xxLT3
SOT−23 10000/Tape & Reel
Thermal Resistance,
Junction-to-Lead
R
q
174 (Note 1)
208 (Note 2)
JL
MMUN21xxLT3G
SOT−23 10000/Tape & Reel
(Pb−Free)
Junction and Storage,
Temperature Range
T , T
J
−55 to +150
stg
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
1. FR−4 @ Minimum Pad
2. FR−4 @ 1.0 x 1.0 inch Pad
DEVICE MARKING INFORMATION
See specific marking information in the device marking table
on page 2 of this data sheet.
Preferred devices are recommended choices for future use
and best overall value.
©
Semiconductor Components Industries, LLC, 2005
1
Publication Order Number:
August, 2005 − Rev. 5
MMUN2111LT1/D
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