DATA SH EET
Product specification
Supersedes data of 1998 Aug 31 2002 Jan 25
DISCRETE SEMICONDUCTORS
BA891
Band-switching diode
M3D319
2002 Jan 25 2
Philips Semiconductors Product specification
Band-switching diode BA891
FEATURES
•Ultra small plastic SMD package
•Low diode capacitance: max. 1.05 pF
•Low diode forward resistance: max. 0.7 Ω
•Small inductance.
APPLICATIONS
•Low loss band-switching in VHF television tuners
•Surface mount band-switching circuits.
DESCRIPTION
The BA891 is a planar high performance band-switching
diode in the ultra small SOD523 SMD plastic package.
MARKING
PINNING
TYPE NUMBER MARKING CODE
BA891 7
PIN DESCRIPTION
1 cathode
2 anode
handbook, halfpage
12
Top view
MAM405
The marking band indicates the cathode.
Fig.1 Simplified outline (SOD523) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VRcontinuous reverse voltage −35 V
IFcontinuous forward current −100 mA
Ptot total power dissipation Ts=90°C−715 mW
Tstg storage temperature −65 +150 °C
Tjjunction temperature −65 +150 °C
2002 Jan 25 3
Philips Semiconductors Product specification
Band-switching diode BA891
THERMAL CHARACTERISTICS
CHARACTERISTICS
Tj= 25°C unless otherwise specified.
Note
1. Guaranteed on AQL basis; inspection level S4, AQL 1.0.
SYMBOL PARAMETER VALUE UNIT
Rth j-s thermal resistance from junction to soldering point 85 K/W
SYMBOL PARAMETER CONDITIONS TYP. MAX. UNIT
VFforward voltage IF=10mA −1V
I
Rreverse current VR=30V −20 nA
Cddiode capacitance f = 1 MHz; note 1; see Fig.2
VR= 1 V 0.8 1.05 pF
VR= 3 V 0.65 0.9 pF
rDdiode forward resistance f = 100 MHz; note 1; see Fig.3
IF= 3 mA 0.42 0.7 Ω
IF= 10 mA 0.28 0.5 Ω
LSseries inductance 0.6 −nH
handbook, halfpage
0102030
1
0
0.8
0.6
0.4
0.2
MGL479
VR (V)
Cd
(pF)
Fig.2 Diode capacitance as a function of reverse
voltage; typical values.
f = 1 MHz; Tj=25°C.
handbook, halfpage
10
1
10−1
MGL478
10−1110
I
F
(mA)
rD
(Ω)
Fig.3 Diode forward resistance as a function of
forward current; typical values.
f = 100 MHz; Tj=25°C.
2002 Jan 25 4
Philips Semiconductors Product specification
Band-switching diode BA891
PACKAGE OUTLINE
REFERENCES
OUTLINE
VERSION EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC EIAJ
SOD523 SC-79 98-11-25
Plastic surface mounted package; 2 leads SOD523
0 0.5 1 mm
scale
D
12
H
E
E
b
p
A
c
vM
A
A
UNIT bpcDEv
mm 0.35
0.25 0.2
0.1 0.15
0.9
0.7
1.3
1.1
A
0.7
0.5
HE
1.7
1.5
DIMENSIONS (mm are the original dimensions)
Note
1. The marking bar indicates the cathode.
(1)
2002 Jan 25 5
Philips Semiconductors Product specification
Band-switching diode BA891
DATA SHEET STATUS
Notes
1. Please consult the most recently issued data sheet before initiating or completing a design.
2. The product status of the device(s) described in this data sheet may have changed since this data sheet was
published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com.
DATA SHEET STATUS(1) PRODUCT
STATUS(2) DEFINITIONS
Objective data Development This data sheet contains data from the objective specification for product
development. Philips Semiconductors reserves the right to change the
specification in any manner without notice.
Preliminary data Qualification This data sheet contains data from the preliminary specification.
Supplementary data will be published at a later date. Philips
Semiconductors reserves the right to change the specification without
notice, in order to improve the design and supply the best possible
product.
Product data Production This data sheet contains data from the product specification. Philips
Semiconductors reserves the right to make changes at any time in order
to improve the design, manufacturing and supply. Changes will be
communicated according to the Customer Product/Process Change
Notification (CPCN) procedure SNW-SQ-650A.
DEFINITIONS
Short-form specification The data in a short-form
specification is extracted from a full data sheet with the
same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limiting values definition Limiting values given are in
accordance with the Absolute Maximum Rating System
(IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device.
These are stress ratings only and operation of the device
attheseoratany otherconditionsabove thosegivenin the
Characteristics sections of the specification is not implied.
Exposure to limiting values for extended periods may
affect device reliability.
Application information Applications that are
described herein for any of these products are for
illustrative purposes only. Philips Semiconductors make
norepresentationor warrantythatsuchapplicationswill be
suitable for the specified use without further testing or
modification.
DISCLAIMERS
Life support applications These products are not
designed for use in life support appliances, devices, or
systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips
Semiconductorscustomersusing orsellingthese products
for use in such applications do so at their own risk and
agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
Right to make changes Philips Semiconductors
reserves the right to make changes, without notice, in the
products, including circuits, standard cells, and/or
software, described or contained herein in order to
improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for
theuseofanyoftheseproducts,conveys nolicence ortitle
under any patent, copyright, or mask work right to these
products,and makes norepresentationsor warranties that
these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified.
2002 Jan 25 6
Philips Semiconductors Product specification
Band-switching diode BA891
NOTES
2002 Jan 25 7
Philips Semiconductors Product specification
Band-switching diode BA891
NOTES
© Koninklijke Philips Electronics N.V. 2002 SCA74
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
Philips Semiconductors – a w orldwide compan y
Contact information
For additional information please visit http://www.semiconductors.philips.com. Fax: +31 40 27 24825
For sales offices addresses send e-mail to: sales.addresses@www.semiconductors.philips.com.
Printed in The Netherlands 613512/03/pp8 Date of release: 2002 Jan 25 Document order number: 9397 750 09281
