1
Motorola SmallSignal Transistors, FETs and Diodes Device Data
Preliminary Data Sheet
Bias Resistor Transistor
PNP Silicon Surface Mount Transistor with
Monolithic Bias Resistor 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 baseemitter
resistor. These digital transistors are designed to replace a single device and its
external resistor bias network. The BRT eliminates these individual components by
i n t e g r a t i n g t h e m i n t o a s i n g l e d e v i c e . T h e D TA 11 4 Y E i s h o u s e d i n t h e
SOT416/SC90 package which is ideal for lowpower surface mount applications
where board space is at a premium.
Simplifies Circuit Design
Reduces Board Space
Reduces Component Count
Available in 8 mm, 7 inch/3000 Unit Tape and Reel.
MAXIMUM RATINGS
(TA = 25
C unless otherwise noted)
Rating
Symbol
Value
Unit
Output Voltage
VO
50
Vdc
Input Voltage
VI
40
Vdc
Output Current
IO
100
mAdc
DEVICE MARKING
DTA114YE = 59
THERMAL CHARACTERISTICS
Power Dissipation @ TA = 25
C(1)
PD
*
125
mW
Operating and Storage Temperature Range
TJ, Tstg
55 to +150
C
Junction Temperature
TJ
150
C
ELECTRICAL CHARACTERISTICS
(TA = 25
C)
Characteristic
Symbol
Min
Typ
Max
Unit
Input Off Voltage (VO = 5.0 Vdc, IO = 100
Adc)
VI(off)
--
--
0.3
Vdc
Input On Voltage (VO = 0.3 Vdc, IO = 1.0 mAdc)
VI(on)
1.4
--
--
Vdc
Output On Voltage (IO = 5.0 mAdc, II = 0.25 mAdc)
VO(on)
--
--
0.3
Vdc
Input Current (VI = 5.0 Vdc)
II
--
--
0.88
mAdc
Output Cutoff Current (VO = 50 Vdc)
IO(off)
--
--
500
nAdc
DC Current Gain (VO = 5.0 Vdc, IO = 5.0 mAdc)
GI
68
--
--
--
Input Resistance
R1
7.0
10
13
kOhms
Resistance Ratio
R1/R2
0.17
0.21
0.25
1. Device mounted on a FR4 glass epoxy printed circuit board using the minimum recommended footprint.
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
Thermal Clad is a trademark of the Bergquist Company
Order this document
by DTA114YE/D
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
DTA114YE
CASE 46301, STYLE 1
SOT416/SC90
1
2
3
R1
R2
IN (1)
GND (2)
OUT (3)
R1 = 10 k
R2 = 47 k
Motorola, Inc. 1996
REV 1
DTA114YE
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Motorola SmallSignal Transistors, FETs and Diodes Device Data
TYPICAL ELECTRICAL CHARACTERISTICS
100
10
1
0
2
4
6
8
10
I O
, OUTPUT
CURRENT
(mA)
G
I, DC CURRENT
GAIN (NORMALIZED)
Figure 1. VO(on) versus IO
IO, OUTPUT CURRENT (mA)
0
20
40
60
80
V
O(on)
, OUTPUT
VOL
T
AGE
(V)
Figure 2. GI, DC Current Gain
1
10
100
IO, OUTPUT CURRENT (mA)
Figure 3. Output Current versus Input Voltage
Figure 4. Input Voltage versus Output Current
VI, INPUT VOLTAGE (V)
Figure 5. Output Capacitance
1
0.1
0.01
0.001
25
C
25
C
TA = 75
C
VO(on) = 10 V
180
160
140
120
100
80
60
40
20
0
2
4
6
8
15
20 40
50 60 70
80 90
25
C
IO/II = 10
TA = 25
C
TA = 75
C
25
C
25
C
VO = 5 V
75
C
LOAD
+12 V
Typical Application
for PNP BRTs
Figure 6. Inexpensive, Unregulated Current Source
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
0
2
4
6
8
10
15
20
25
30
35
40
45
50
VR, REVERSE BIAS VOLTAGE (VOLTS)
C
ob
, CAP
ACIT
ANCE
(pF)
f = 1 MHz
lE = 0 V
TA = 25
C
10
1
0.1
0
10
20
30
40
50
V
I
, INPUT
VOL
T
AGE (VOL
TS)
IO, OUTPUT CURRENT (mA)
VO = 0.2 V
25
C
TA = 25
C
75
C
DTA114YE
3
Motorola SmallSignal Transistors, FETs and Diodes Device Data
MINIMUM RECOMMENDED FOOTPRINTS FOR SURFACE MOUNTED APPLICATIONS
Surface mount board layout is a critical portion of the total
design. The footprint for the semiconductor packages must
be the correct size to insure proper solder connection
interface between the board and the package. With the
correct pad geometry, the packages will self align when
subjected to a solder reflow process.
1.4
1
0.5 min. (3x)
0.5 min. (3x)
TYPICAL
0.5
SOLDERING PATTERN
Unit: mm
SOT416/SC90 POWER DISSIPATION
The power dissipation of the SOT416/SC90 is a function
of the pad size. This can vary from the minimum pad size for
soldering to the pad size given for maximum power
dissipation. Power dissipation for a surface mount device is
determined by TJ(max), the maximum rated junction tempera-
ture of the die, R
JA, the thermal resistance from the device
junction to ambient; and the operating temperature, TA.
Using the values provided on the data sheet, PD can be
calculated as follows:
PD =
TJ(max) TA
R
JA
The values for the equation are found in the maximum
ratings table on the data sheet. Substituting these values into
the equation for an ambient temperature TA of 25
C, one can
calculate the power dissipation of the device which in this
case is 125 milliwatts.
PD =
150
C 25
C
1000
C/W
= 125 milliwatts
The 1000
C/W assumes the use of the recommended
footprint on a glass epoxy printed circuit board to achieve a
power dissipation of 125 milliwatts. Another alternative would
be to use a ceramic substrate or an aluminum core board
such as Thermal Clad
TM
. Using a board material such as
Thermal Clad, a higher power dissipation can be achieved
using the same footprint.
SOLDERING PRECAUTIONS
The melting temperature of solder is higher than the rated
temperature of the device. When the entire device is heated
to a high temperature, failure to complete soldering within a
short time could result in device failure. Therefore, the
following items should always be observed in order to
minimize the thermal stress to which the devices are
subjected.
Always preheat the device.
The delta temperature between the preheat and
soldering should be 100
C or less.*
When preheating and soldering, the temperature of the
leads and the case must not exceed the maximum
temperature ratings as shown on the data sheet. When
using infrared heating with the reflow soldering method,
the difference should be a maximum of 10
C.
The soldering temperature and time should not exceed
260
C for more than 10 seconds.
When shifting from preheating to soldering, the
maximum temperature gradient should be 5
C or less.
After soldering has been completed, the device should
be allowed to cool naturally for at least three minutes.
Gradual cooling should be used as the use of forced
cooling will increase the temperature gradient and result
in latent failure due to mechanical stress.
Mechanical stress or shock should not be applied during
cooling.
* Soldering a device without preheating can cause excessive
thermal shock and stress which can result in damage to the
device.
DTA114YE
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Motorola SmallSignal Transistors, FETs and Diodes Device Data
SOLDER STENCIL GUIDELINES
Prior to placing surface mount components onto a printed
circuit board, solder paste must be applied to the pads. A
solder stencil is required to screen the optimum amount of
solder paste onto the footprint. The stencil is made of brass
or stainless steel with a typical thickness of 0.008 inches.
The stencil opening size for the surface mounted package
should be the same as the pad size on the printed circuit
board, i.e., a 1:1 registration.
TYPICAL SOLDER HEATING PROFILE
For any given circuit board, there will be a group of control
settings that will give the desired heat pattern. The operator
must set temperatures for several heating zones, and a
figure for belt speed. Taken together, these control settings
make up a heating "profile" for that particular circuit board.
On machines controlled by a computer, the computer
remembers these profiles from one operating session to the
next. Figure 7 shows a typical heating profile for use when
soldering a surface mount device to a printed circuit board.
This profile will vary among soldering systems but it is a good
starting point. Factors that can affect the profile include the
type of soldering system in use, density and types of
components on the board, type of solder used, and the type
of board or substrate material being used. This profile shows
temperature versus time. The line on the graph shows the
actual temperature that might be experienced on the surface
of a test board at or near a central solder joint. The two
profiles are based on a high density and a low density board.
The Vitronics SMD310 convection/infrared reflow soldering
system was used to generate this profile. The type of solder
used was 62/36/2 Tin Lead Silver with a melting point
between 177 189
C. When this type of furnace is used for
solder reflow work, the circuit boards and solder joints tend to
heat first. The components on the board are then heated by
conduction. The circuit board, because it has a large surface
area, absorbs the thermal energy more efficiently, then
distributes this energy to the components. Because of this
effect, the main body of a component may be up to 30
degrees cooler than the adjacent solder joints.
STEP 1
PREHEAT
ZONE 1
"RAMP"
STEP 2
VENT
"SOAK"
STEP 3
HEATING
ZONES 2 & 5
"RAMP"
STEP 4
HEATING
ZONES 3 & 6
"SOAK"
STEP 5
HEATING
ZONES 4 & 7
"SPIKE"
STEP 6
VENT
STEP 7
COOLING
200
C
150
C
100
C
50
C
TIME (3 TO 7 MINUTES TOTAL)
TMAX
SOLDER IS LIQUID FOR
40 TO 80 SECONDS
(DEPENDING ON
MASS OF ASSEMBLY)
205
TO 219
C
PEAK AT
SOLDER JOINT
DESIRED CURVE FOR LOW
MASS ASSEMBLIES
100
C
150
C
160
C
140
C
Figure 7. Typical Solder Heating Profile
DESIRED CURVE FOR HIGH
MASS ASSEMBLIES
170
C
DTA114YE
5
Motorola SmallSignal Transistors, FETs and Diodes Device Data
PACKAGE DIMENSIONS
CASE 46301
ISSUE A
SOT416/SC90
DIM
MIN
MAX
MIN
MAX
INCHES
MILLIMETERS
A
0.70
0.80
0.028
0.031
B
1.40
1.80
0.055
0.071
C
0.60
0.90
0.024
0.035
D
0.15
0.30
0.006
0.012
G
1.00 BSC
0.039 BSC
H
0.10
0.004
J
0.10
0.25
0.004
0.010
K
1.45
1.75
0.057
0.069
L
0.10
0.20
0.004
0.008
S
0.50 BSC
0.020 BSC
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
M
0.20 (0.008)
B
A
B
S
D
G
3 PL
0.20 (0.008) A
K
J
L
C
H
3
2
1
STYLE 1:
PIN 1. BASE
2. EMITTER
3. COLLECTOR
DTA114YE
6
Motorola SmallSignal Transistors, FETs and Diodes Device Data
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals"
must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
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arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
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Opportunity/Affirmative Action Employer.
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