©2003 Fairchild Semiconductor Corporation Rev. A, June 2003
BF256A/BF256B/BF256C
Absolute Maximum Ratings Ta=25°C unless otherwise noted
Electrical Characteristics Ta=25°C unless otherwise noted
Symbol Parameter Value Units
VDG Drain-Gate Voltage 30 V
VGS Gate-So urce Voltage -30 V
IGF Forward Gate Current 10 mA
PDTotal Device Dissipation @TA=25°C
Derate above 25°C350
2.8 mW
mW/°C
TSTG Operating and storage Temperature Range - 55 ~ 150 °C
Symbol Parameter Test Co ndition Min. Max. Units
Off Characteristics
V(BR)GSS Gate-Source Breakdown Voltage VDS = 0, IG = 1µA-30V
VGS Gate-Source VDS = 15V, ID = 200µA -0.5 -7.5 V
VGS(off) Gate-Source Cutoff Voltage VDS = 15V, ID = 10nA -0.5 -8 V
IGSS Gate Reverse Current VGS = -20V, VGS = 0 -5 nA
On Characteristics
IDSS Zero-Gate Voltage Drain Current
BF256A
BF256B
BF256C
VGS = 15V, VGS = 0 3
6
11
7
13
18
mA
Small Signal Characteristics
gfs Common Source Forward Transconductance VDS = 15V, VGS = 0, f = 1KHz 4.5 mmhos
BF256A/BF256B/BF256C
N-Channel RF Amplifiers
• This device is designed for VHF/UHF amplifiers.
• Sourced from process 50.
TO-92
1. Gate 2. Source 3. Drain
1
©2003 Fairchild Semiconductor Corporation Rev. A, June 2003
BF256A/BF256B/BF256C
Package Dimensions
Dimensions in Millimeters
0.46 ±0.10
1.27TYP
(R2.29)
3.86MAX
[1.27 ±0.20]1.27TYP
[1.27 ±0.20]
3.60 ±0.20
14.47 ±0.40
1.02 ±0.10
(0.25) 4.58 ±0.20
4.58 +0.25
–0.15
0.38 +0.10
–0.05
0.38 +0.10
–0.05
TO-92
©2003 Fairchild Semiconductor Corporation Rev. I2
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not
intended to be an exhaustive list of all su ch trademarks .
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY A NY LICENSE UNDER ITS PATENT RIGHTS, N OR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR
CORPORATION.
As used herein:
1. Life support devices or systems are devic es or syst em s
which, (a) ar e intended for surgical implant into the body,
or (b) support or sustain life, or (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in significant injury to the user.
2. A critical component is any component of a lif e support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification Product Status Definition
Advance Information Formative or In
Design This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
Preliminary First Production T his datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconduct or reserv es the right to make
changes at any time without notice in order to improve
design.
No Identification Needed Full Production This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Obsolete Not In Production This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
FACT™
FACT Quiet series™
FAST®
FASTr™
FRFET™
GlobalOptoisolator™
GTO™
HiSeC™
I2C™
ImpliedDisconnect™
ISOPLANAR™
LittleFET™
MicroFET™
MicroPak™
MICROWIRE™
MSX™
MSXPro™
OCX™
OCXPro™
OPTOLOGIC®
OPTOPLANAR™
PACMAN™
POP™
Power247™
PowerTrench®
QFET™
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
RapidConnect™
SILENT SWITCHER®
SMART START™
SPM™
Stealth™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
SyncFET™
TinyLogic®
TruTranslation™
UHC™
UltraFET®
VCX™
ACEx™
ActiveArray™
Bottomless™
CoolFET™
CROSSVOLT™
DOME™
EcoSPARK™
E2CMOS™
EnSigna™
Across the board. Around the world.™
The Power Franchise™
Programmab le Acti ve Droo p™
