DATA SH EET
Product specification
Supersedes data of November 1993 1996 May 03
DISCRETE SEMICONDUCTORS
BBY31
UHF variable capacitance diode
al
fpage
M3D088
1996 May 03 2
Philips Semiconductors Product specification
UHF variable capacitance diode BBY31
FEATURES
•Excellent linearity
•Small plastic SMD package
•C28: 1.9 pF; ratio: 8.3.
APPLICATIONS
•Electronic tuning in UHF television
tuners
•VCO.
DESCRIPTION
The BBY31 is a variable capacitance
diode, fabricated in planar
technology, and encapsulated in the
SOT23 small plastic SMD package. Fig.1 Simplified outline (SOT23), pin configuration and symbol.
handbook, halfpage
21
3
MAM170
2
n.c. 1
3
Marking code: S1.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
ELECTRICAL CHARACTERISTICS
Tj=25°C; unless otherwise specified.
Note
1. VR is the value at which Cd= 9 pF.
SYMBOL PARAMETER MIN. MAX. UNIT
VRcontinuous reverse voltage −30 V
IFcontinuous forward current −20 mA
Tstg storage temperature −55 +150 °C
Tjoperating junction temperature −55 +125 °C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
IRreverse current VR= 28 V; see Fig.3 −−10 nA
VR= 28 V; Tj=85°C; see Fig.3 −−200 nA
rsdiode series resistance f = 470 MHz; note 1 −−1.2 Ω
Cddiode capacitance VR= 1 V; f = 1 MHz; see Figs 2 and 4 −16.5 −pF
VR= 28 V; f = 1 MHz; see Figs 2 and 4 1.6 −2pF
capacitance ratio f = 1 MHz −8.3 −
Cd1V()
C
d28V()
--------------------
1996 May 03 3
Philips Semiconductors Product specification
UHF variable capacitance diode BBY31
GRAPHICAL DATA
Fig.2 Diode capacitance as a function of reverse voltage; typical values.
f = 1 MHz; Tj=25°C.
handbook, full pagewidth
0
20
MBE874
102
10110 −1
4
8
12
16
Cd
(pF)
VR (V)
Fig.3 Reverse current as a function of junction
temperature; maximum values.
handbook, halfpage
1000
10
MLC816
102
103
50
IR
(nA)
T ( C)
jo
Fig.4 Temperature coefficient of diode
capacitance as a function of reverse
voltage; typical values.
handbook, halfpage
MLC815
11010
2
10 3
10 4
10 5
10 1
(K−1)
V (V)
R
d
TC
1996 May 03 4
Philips Semiconductors Product specification
UHF variable capacitance diode BBY31
PACKAGE OUTLINE
DEFINITIONS
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 customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
Data sheet status
Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). 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 at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
Dimensions in mm.
Fig.5 SOT23.
handbook, full pagewidth
MBC846
10
max
o
10
max
o
30
max
o
1.1
max
0.55
0.45
0.150
0.090
0.1
max
21
3
M0.1 AB
0.48
0.38
TOP VIEW
1.4
1.2 2.5
max
3.0
2.8
M
0.2 A
A
B
0.95
1.9