LESHAN RADIO COMPANY, LTD.
P31/4
1
3
2
SC-89
3
COLLECTOR
2
EMITTER
1
BASE
R1
R2
Bias Resistor Transistor
PNP Silicon Surface Mount Transistor
with Monolithic Bias Resistor Network
This new digital transistor is designed to replace a single device
and its external resistor bias network. The BRT (Bias Resistor Tra-
nsistor) contains a single transistor with a monolithic bias network
consisting of two resistors; a series base resistor and a baseemitter
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
SC89 package which is designed for low power surface mount
applications.
Simplifies Circuit Design
Reduces Board Space
Reduces Component Count
LDTA124EET1
Symbol
Value
Unit
Collector-Base Voltage
VCBO
50
Vdc
Collector-Emitter Voltage
VCEO
50
Vdc
Collector Current
IC
100
mAdc
MAXIMUM RATINGS
(TA = 25
C unless otherwise noted)
Ratin
g
DEVICE MARKING AND RESISTOR VALUES
Device
Marking
R1 (K)
R2 (K)
Shipping
LDTA124EET1
6
B
22
22
3000/Tape & Reel
THERMAL CHARACTERISTICS
Characteristic
Symbol
Max
Unit
Total Device Dissipation,
FR4 Board (Note 1.) @ TA = 25
C
Derate above 25
C
PD
200
1.6
mW
mW/
C
Thermal Resistance, Junction to Ambient (Note 1.)
R
JA
600
C/W
Total Device Dissipation,
FR4 Board (Note 2.) @ TA = 25
C
Derate above 25
C
PD
300
2.4
mW
mW/
C
Thermal Resistance, Junction to Ambient (Note 2.)
R
JA
400
C/W
Junction and Storage Temperature Range
TJ, Tstg
55 to +150
C
1. FR4 @ Minimum Pad
2. FR4 @ 1.0
1.0 Inch Pad
LESHAN RADIO COMPANY, LTD.
ELECTRICAL CHARACTERISTICS
(TA = 25
C unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
Symbol
Min
Typ
Max
Unit
CollectorBase Cutoff Current (VCB = 50 V, IE = 0)
ICBO
CollectorEmitter Cutoff Current (VCE = 50 V, IB = 0)
ICEO
100
nAdc
500
nAdc
EmitterBase Cutoff Curren (VEB = 6.0 V, IC = 0 )
IEBO
mAdc
0.2
CollectorBase Breakdown Voltage (IC = 10
A, IE = 0)
V(BR)CBO
50
Vdc
CollectorEmitter Breakdown Voltage (IC = 2.0 mA, IB = 0)
V(BR)CEO
50
Vdc
DC Current Gain (VCE = 10 V, IC = 5.0 mA) hFE
60
100
Output Voltage (on) (VCC = 5.0 V, VB = 2.5 V, RL = 1.0 k) VOL 0.2 Vdc
Input Resistor
R1
28.6
22
15.4
1.2
k
Resistor Ratio
R1/R2
0.8
1.0
VCE(sat)
0.25
Vdc
CollectorEmitter Saturation Voltage
(IC = 10 mA, IB = 1 mA, IE = 0.3 mA)
LDTA124EET1
P32/4
LESHAN RADIO COMPANY, LTD.
P33/4
ELECTRICAL CHARACTERISTIC CURVES
LDTA124EET1
h F
E, DC CURREN
T
GAIN (NORMALIZED)
Figure 1. VCE(sat) versus IC
Figure 2. DC Current Gain
1000
10
IC, COLLECTOR CURRENT (mA)
100
10
1
100
0.01
V CE(sat)
, MAXIMUM COLLECT
OR VOL
T
AGE (VOL
TS)
0.1
1
10
40
IC, COLLECTOR CURRENT (mA)
0
20
50
75
C
25
C
TA = -25
C
IC/IB = 10
25
C
-25
C
VCE = 10 V
TA = 75
C
I C
, COLLEC
T
OR CURREN
T
(mA
)
Figure 3. Output Capacitance
Figure 4. Output Current versus Input Voltage
100
10
1
0.1
0.01
0.001 0 1
2
3
4
Vin, INPUT VOLTAGE (VOLTS)
5
6
7
8
9
10
50
0
10
20
30
40
4
3
2
1
0
VR, REVERSE BIAS VOLTAGE (VOLTS)
C ob
, CAP
ACIT
ANCE (pF)
f = 1 MHz
lE = 0 V
TA = 25
C
75
C
25
C
TA = -25
C
VO = 5 V
V i
n
, INPU
T
VO
L
T
AGE (VO
L
TS)
IC, COLLECTOR CURRENT (mA)
0
10
20
30
VO = 0.2 V
TA = -25
C
75
C
100
10
1
0.1
40
50
Figure 5. Input Voltage versus Output Current
25
C
LESHAN RADIO COMPANY, LTD.
G
M
0.08 (0.003)
X
D
3 PL
J
-X-
-Y-
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETERS
3. MAXIMUM LEAD THICKNESS INCLUDES LEAD
FINISH THICKNESS. MINIMUM LEAD THICKNESS
IS THE MINIMUM THICKNESS OF BASE
MATERIAL.
4. 463C-01 OBSOLETE, NEW STANDARD 463C-02.
A
B
Y
1
2
3
N
2 PL
K
C
-T-
SEATING
PLANE
DIM
A
MIN
NOM
MIN
NOM
INCHES
1.50
1.60
1.70
0.059
MILLIMETERS
B
0.75
0.85
0.95
0.030
C
0.60
0.70
0.80
0.024
D
0.23
0.28
0.33
0.009
G
0.50 BSC
H
0.53 REF
J
0.10
0.15
0.20
0.004
K
0.30
0.40
0.50
0.012
L
1.10 REF
M
---
---
10
---
N
---
---
10
---
S
1.50
1.60
1.70
0.059
0.063
0.067
0.034
0.040
0.028
0.031
0.011
0.013
0.020 BSC
0.021 REF
0.006
0.008
0.016
0.020
0.043 REF
---
10
---
10
0.063
0.067
MAX
MAX
_
_
_
_
M
H
H
L
G
RECOMMENDED PATTERN
OF SOLDER PADS
S
SC-8
9
LDTA124EET1
P34/4
PDF 
ZIP