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DISCRETE SEMICONDUCTORS
DATA SHEET
M3D319
BB179B
UHF variable capacitance diode
Product specification
1997 Nov 13
11011629.049.png
Philips Semiconductors
Product specification
UHF variable capacitance diode
BB179B
FEATURES
DESCRIPTION
·
Excellent linearity
The BB179B is a planar technology
variable capacitance diode, in a
SOD523 (SC-79) package. The
excellent matching performance is
achieved by gliding matching and a
direct matching assembly procedure.
·
Excellent matching to 2% DMA
handbook, 2 columns
1
2
·
Ultra small plastic SMD package
·
C28: 2.1 pF; ratio: 9
MBK441
·
Low series resistance.
APPLICATIONS
PINNING
Marking code: C.
Orientation of marking code as shown.
Cathode side indicated by a bar.
·
Electronic tuning in UHF television
tuners
PIN
DESCRIPTION
1
cathode
Fig.1 Simplified outline
(SOD523; SC-79) and symbol.
·
Voltage controlled oscillators
(VCO).
2
anode
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V R
continuous reverse voltage
-
32
V
V RM
peak reverse voltage
in series with a 10 k
W
resistor
-
35
V
I F
continuous forward current
-
20
mA
T stg
storage temperature
- 55
+150
°
C
T j
operating junction temperature
-
55
+125
°
C
ELECTRICAL CHARACTERISTICS
T j =25
°
C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
I R
reverse current
V R = 30 V; see Fig.3
-
-
10
nA
V R = 30 V; T j =85
°
C; see Fig.3
-
-
200
nA
r s
diode series resistance
f = 470 MHz;
V R is the value at which C d =9pF
-
0.6
0.75
W
C d
diode capacitance
V R = 1 V; f = 1 MHz; see Figs 2 and 4 18.22
-
20
pF
V R = 28 V; f = 1 MHz; see Figs 2 and 4 1.9
-
2.25
pF
C d1 ( )
C d2 ( )
capacitance ratio
f = 1 MHz
-
1.27
-
------------------
C d1 ( )
C d28V
capacitance ratio
f = 1 MHz
8.45
-
10
--------------------
(
)
C d25V
capacitance ratio
f = 1 MHz
-
1.05
-
( )
d28V
--------------------
(
)
D C d
C d
capacitance matching
V R = 1 to 28 V; in a sequence of 15
diodes (gliding)
-
-
2
%
----------
1997 Nov 13
2
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Philips Semiconductors
Product specification
UHF variable capacitance diode
BB179B
GRAPHICAL DATA
MBK440
handbook, full pagewidth
24
C d
(pF)
20
16
12
8
4
0
10 - 1
10 2
1
10
V R (V)
f = 1 MHz; T j =25 ° C .
Fig.2 Diode capacitance as a function of reverse voltage; typical values.
MLC816
3
MLC815
10 3
10
handbook, halfpage
handbook, halfpage
I R
(nA)
TC
d
(K - 1 )
10 2
10
4
10
10
5
10
1
10 2
0
50
100
1
10
T ( C)
j
V (V)
R
T j = 0 to 85 ° C.
Fig.3 Reverse current as a function of junction
temperature; maximum values.
Fig.4 Temperature coefficient of diode
capacitance as a function of
reverse voltage; typical values.
1997 Nov 13
3
o
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Philips Semiconductors
Product specification
UHF variable capacitance diode
BB179B
PACKAGE OUTLINE
Plastic surface mounted package; 2 leads
SOD523
A
c
H E
v M A
D
A
0
0.5
1 mm
1
2
scale
E b p
DIMENSIONS (mm are the original dimensions)
UNIT
A
b p
c
D
E
H E
v
(1)
mm
0.7
0.5
0.35
0.25
0.2
0.1
1.3
1.1
0.9
0.7
1.7
1.5
0.15
Note
1. The marking bar indicates the cathode.
OUTLINE
VERSION
REFERENCES
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
EIAJ
SOD523
SC-79
98-11-25
1997 Nov 13
4
11011629.046.png
Philips Semiconductors
Product specification
UHF variable capacitance diode
BB179B
DEFINITIONS
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.
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.
1997 Nov 13
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