Page 1
®
SMALL SIGNAL PNP TRANSISTOR
Type Marking
BF721 721
■ SILICON EPI TAX IA L PLANAR PN P HIGH
VOLTAGE TRANSISTOR
■ SOT-223 PLASTIC PAC KAG E FOR
SURFACE MOUNTING CIRCUITS
■ TAPE AND REEL PACKING
■ THE NPN COM PLE M ENT A RY TY P E IS
BF720
BF721
PRELIMINARY DATA
2
3
2
1
APPLICATIONS
■ VIDEO AMPLIFIER CIRC UITS (RGB
SOT-223
CATHODE CURRENT CONTROL)
■ TELEPHONE WIRELINE INTERFACE (HOOK
SWITCHES, DIALER CIRCUITS)
INTER NAL SCH E M ATI C DIAG RA M
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
I
P
T
Collector-Base Voltage (IE = 0) -300 V
CBO
Collector-Emitter Voltage (IB = 0) -300 V
CEO
Emitter-Base Voltage (IC = 0) -5 V
EBO
Collector Current -100 mA
I
C
Collector Peak Current -200 mA
CM
Total Dissipation at TC = 25 oC 1.4 W
tot
Storage Temperature -65 to 150
stg
Max. Operating Junction Temperature 150
T
j
o
C
o
C
May 2002
1/4
Page 2
BF721
THERMAL DATA
R
• Device mounted on a PCB area of 1 cm
• Thermal Resistance Junction-Ambient Max 89.3
thj-amb
o
2
C/W
ELECTRICAL CHARACTERISTICS (T
= 25 oC unless otherwise specified)
case
Symbol Parameter Test Conditions Min. Typ. Max. Unit
I
CBO
I
EBO
V
(BR)CEO
Collector Cut-off
Current (I
= 0)
E
Emitter Cut-off Current
(I
= 0)
C
∗ Collector-Emitter
= -200 V
V
CB
V
= -200 V TC = 150 oC
CB
V
= -300 V
CB
= -5 V -50 nA
V
EB
= -10 mA -300 V
I
C
-10
-10
-100
Breakdown Voltage
(I
= 0)
B
V
(BR)EBO
Emitter-Base
= -100 µA
I
E
-5 V
Breakdown Voltage
(I
= 0)
C
V
∗ Collector-Emitter
CE(sat)
IC = -30 mA IB = - 5 mA -0.6 V
Saturation Voltage
V
∗ Base-Emitter
BE(sat)
IC = -30 mA IB = - 5 mA -1.2 V
Saturation Voltage
h
∗ DC Current Gain IC = -25 mA VCE = -20 V 50
FE
f
C
CBO
Transition Frequency IC = -15 mA VCE = -10V f =100 MHz 60 MHz
T
Collector-Base
IE = 0 VCB = -10 V f = 1MHz 6 pF
Capacitance
C
EBO
Emitter-Base
IC = 0 VEB = -2 V f = 1MHz 22 pF
Capacitance
∗ Pulsed: Pulse duration = 300 µs, duty cycle ≤ 2 %
nA
µA
µA
2/4
Page 3
SOT-223 MECHANICAL DATA
BF721
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.80 0.071
B 0.60 0.70 0.80 0.024 0.027 0.031
B1 2.90 3.00 3.10 0.114 0.118 0.122
c 0.24 0.26 0.32 0.009 0.010 0.013
D 6.30 6.50 6.70 0.248 0.256 0.264
e 2.30 0.090
e1 4.60 0.181
E 3.30 3.50 3.70 0.130 0.138 0.146
H 6.70 7.00 7.30 0.264 0.276 0.287
V10
A1 0.02
mm inch
o
10
o
P008B
3/4
Page 4
BF721
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such inform ation nor for any infringe ment o f patents or other rig hts o f third par ties which ma y resul t from i ts use. N o li cen se is
granted by implicatio n or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical compo nents in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a trademark of STMicroelectronics
© 2002 STMicroelectro nics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
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