MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
High Voltage Transistor
NPN Silicon
COLLECTOR
3
2
BASE
1
EMITTER
BF844
MAXIMUM RATINGS
Rating
Collector – Emitter Voltage
Collector – Base Voltage
Emitter – Base Voltage
Collector Current — Continuous
Total Device Dissipation @ TA = 25°C
Derate above 25°C
Total Device Dissipation @ TC = 25°C
Derate above 25°C
Operating and Storage Junction
Temperature Range
Symbol
VCEO
VCBO
VEBO
IC
PD
PD
TJ, Tstg
Value
400
450
6.0
300
625
5.0
1.5
12
– 55 to +150
Unit
Vdc
Vdc
Vdc
mAdc
mW
mW/°C
Watt
mW/°C
°C
1
2
3
CASE 29–04, STYLE 1
TO–92 (TO–226AA)
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance, Junction to Ambient
Thermal Resistance, Junction to Case
Symbol
R
q
JA
R
q
JC
Max
200
83.3
Unit
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(TA = 25°C unless otherwise noted)
Characteristic
Symbol
Min
Max
Unit
OFF CHARACTERISTICS
Collector – Emitter Breakdown Voltage(1)
(IC = 1.0 mAdc, IB = 0)
Collector – Emitter Breakdown Voltage
(IC = 100
µAdc,
VBE = 0)
Collector – Base Breakdown Voltage
(IC = 100
m
Adc, IE = 0)
Emitter – Base Breakdown Voltage
(IE = 10
m
Adc, IC = 0)
Collector Cutoff Current
(VCB = 400 Vdc, IE = 0)
Collector Cutoff Current
(VCE = 400 Vdc, VBE = 0)
Emitter Cutoff Current
(VEB = 4.0 Vdc, IC = 0)
1. Pulse Test: Pulse Width
V(BR)CEO
V(BR)CES
V(BR)CBO
V(BR)EBO
ICBO
ICES
IEBO
400
450
450
6.0
—
—
—
—
—
—
—
0.1
500
0.1
Vdc
Vdc
Vdc
Vdc
µAdc
nAdc
µAdc
v
300
m
s, Duty Cycle
v
2.0%.
2–258
Motorola Small–Signal Transistors, FETs and Diodes Device Data
BF844
ELECTRICAL CHARACTERISTICS
(TA = 25°C unless otherwise noted) (Continued)
Characteristic
Symbol
Min
Max
Unit
ON CHARACTERISTICS
DC Current Gain(1)
(IC = 1.0 mAdc, VCE = 10 Vdc)
(IC = 10 mAdc, VCE = 10 Vdc)
(IC = 50 mAdc, VCE = 10 Vdc)
(IC = 100 mAdc, VCE = 10 Vdc)
Collector – Emitter Saturation Voltage(1)
(IC = 1.0 mAdc, IB = 0.1 mAdc)
(IC = 10 mAdc, IB = 1.0 mAdc)
(IC = 50 mAdc, IB = 5.0 mAdc)
Base – Emitter Saturation Voltage
(IC = 10 mAdc, IB = 1.0 mAdc)
hFE
40
50
45
20
VCE(sat)
—
—
—
VBE(sat)
—
0.4
0.5
0.75
0.75
Vdc
—
200
—
—
Vdc
—
DYNAMIC CHARACTERISTICS
High Frequency Current Gain
(IC = 10 mAdc, VCE = 10 Vdc, f = 20 MHz)
Collector–Base Capacitance
(VCB = 20 Vdc, IE = 0, f = 1.0 MHz)
Emitter–Base Capacitance
(VEB = 0.5 Vdc, IC = 0, f = 1.0 MHz)
Turn–On Time
(VCC = 150 Vdc, VBE(off) = 4.0 V, IC = 30 mAdc, IB1 = 3.0 mAdc)
Turn–Off Time
(VCC = 150 Vdc, IC = 30 mAdc, IB1 = IB2 = 3.0 mAdc)
1. Pulse Test: Pulse Width
|hfe|
Cob
Cib
ton
toff
1.0
—
—
—
—
—
6.0
110
0.6
10
pF
pF
µs
µs
v
300
m
s, Duty Cycle
v
2.0%.
Motorola Small–Signal Transistors, FETs and Diodes Device Data
2–259
BF844
160
140
hFE, DC CURRENT GAIN
120
100
80
60
40
–55°C
20
1.0
2.0
100
5.0
10
20
50
IC, COLLECTOR CURRENT (mA)
200 300
25°C
TA = 125°C
VCE = 10 V
VCE , COLLECTOR–EMITTER VOLTAGE (VOLTS)
0.5
0.4
IC = 1.0 mA
IC = 10 mA
IC = 50 mA
0.3
TA = 25°C
0.2
0.1
0
10
30
100
300
1.0 k 3.0 k
IB, BASE CURRENT (µA)
10 k
50 k
Figure 1. DC Current Gain
Figure 2. Collector Saturation Region
1.0
TA = 25°C
VBE(sat) @ IC/IB = 10
1000
1.0 ms
IC, COLLECTOR CURRENT (mA)
300
200
100
TA = 25°C
TC = 25°C
100
µs
0.8
V, VOLTAGE (VOLTS)
1.0 s
0.6
VBE(on) @ VCE = 10 V
0.4
20
10
CURRENT LIMIT
THERMAL LIMIT
SECOND BREAKDOWN LIMIT
VALID FOR DUTY CYCLE
≤
10%
2.0
10
20
50
100
5.0
VCE, COLLECTOR VOLTAGE (VOLTS)
200
500
0.2
VCE(sat) @ IC/IB = 10
2.0
0
0.1
0.3
30
3.0
10
1.0
IC, COLLECTOR CURRENT (mA)
100
300
1.0
1.0
Figure 3. On Voltages
Figure 4. Active Region Safe Operating Area
100
50
C, CAPACITANCE (pF)
20
10
5.0
2.0
1.0
0.3 0.5
TA = 25°C
f = 1.0 MHz
1.0
3.0
10
30
REVERSE BIAS (VOLTS)
100
300
Cob
|h fe |, SMALL–SIGNAL CURRENT GAIN
Cib
10
3.0
2.0
1.5
1.0
0.1
VCE = 10 V
f = 10 MHz
TA = 25°C
0.2 0.3
1.0
3.0
10
IC, COLLECTOR CURRENT (mA)
30
100
Figure 5. Capacitance
Figure 6. High Frequency Current Gain
2–260
Motorola Small–Signal Transistors, FETs and Diodes Device Data
BF844
10
5.0
+9.7 V
PW = 50
µs
DUTY CYCLE = 2.0%
Vin
t, TIME (
µ
s)
2.0
1.0
0.5
VCC = 150 V
IC/IB = 10
TA = 25°C
VBE(off) = 4.0 Vdc
tr
td
50
100
Vin
RB
0
–4.0 V
VCC
RL
Vout
0.2
0.1
1.0
3.0
10
30
IC, COLLECTOR CURRENT (mA)
CS
≤
4.0 pF*
Figure 7. Turn–On Switching Times and Test Circuit
10
5.0
ts
t, TIME (
µ
s)
2.0
1.0
0.5
VCC = 150 V
IC/IB = 10
TA = 25°C
3.0
10
30
IC, COLLECTOR CURRENT (mA)
50
tf
–11.4 V
+10.7 V
Vin
PW = 50
µs
DUTY CYCLE = 2.0%
0.2
0.1
1.0
VCC
RL
100
Vin
RB
CS
≤
4.0 pF*
Vout
Figure 8. Turn–Off Switching Times and Test Circuit
* Total Shunt Capacitance or Test Jig and Connectors.
Motorola Small–Signal Transistors, FETs and Diodes Device Data
2–261
EMBOSSED TAPE AND REEL
SOT-23, SC-59, SC-70/SOT-323, SC–90/SOT–416, SOT-223 and SO-16 packages are available only in
Tape and Reel.
Use the appropriate suffix indicated below to order any of the SOT-23, SC-59,
SC-70/SOT-323, SOT-223 and SO-16 packages. (See Section 6 on Packaging for additional information).
SOT-23:
available in 8 mm Tape and Reel
Use the device title (which already includes the “T1” suffix) to order the 7 inch/3000 unit reel.
Replace the “T1” suffix in the device title with a “T3” suffix to order the 13 inch/10,000 unit reel.
available in 8 mm Tape and Reel
Use the device title (which already includes the “T1” suffix) to order the 7 inch/3000 unit reel.
Replace the “T1” suffix in the device title with a “T3” suffix to order the 13 inch/10,000 unit reel.
available in 8 mm Tape and Reel
Use the device title (which already includes the “T1” suffix) to order the 7 inch/3000 unit reel.
Replace the “T1” suffix in the device title with a “T3” suffix to order the 13 inch/10,000 unit reel.
available in 12 mm Tape and Reel
Use the device title (which already includes the “T1” suffix) to order the 7 inch/1000 unit reel.
Replace the “T1” suffix in the device title with a “T3” suffix to order the 13 inch/4000 unit reel.
available in 16 mm Tape and Reel
Add an “R1” suffix to the device title to order the 7 inch/500 unit reel.
Add an “R2” suffix to the device title to order the 13 inch/2500 unit reel.
SC-59:
SC-70/
SOT-323:
SOT-223:
SO-16:
RADIAL TAPE IN FAN FOLD BOX OR REEL
TO-92 packages are available in both bulk shipments and in Radial Tape in Fan Fold Boxes or Reels.
Fan Fold Boxes and Radial Tape Reel are the best methods for capturing devices for automatic insertion in
printed circuit boards.
TO-92:
available in Fan Fold Box
Add an “RLR” suffix and the appropriate Style code* to the device title to order the Fan Fold box.
available in 365 mm Radial Tape Reel
Add an “RLR” suffix and the appropriate Style code* to the device title to order the Radial Tape
Reel.
*Refer to Section 6 on Packaging for Style code characters and additional information on ordering
*requirements.
DEVICE MARKINGS/DATE CODE CHARACTERS
SOT-23, SC-59, SC-70/SOT-323, and the SC–90/SOT–416 packages have a device marking and a date
code etched on the device.
The generic example below depicts both the device marking and a representa-
tion of the date code that appears on the SC-70/SOT-323, SC-59 and SOT-23 packages.
ABC
D
The “D” represents a smaller alpha digit Date Code. The Date Code indicates the actual month in which the
part was manufactured.
2–2
Motorola Small–Signal Transistors, FETs and Diodes Device Data