BB179B
UHF variable capacitance diode
Rev. 3 — 5 September 2011
Product data sheet
1. Product profile
1.1 General description
The BB179B is a variable capacitance diode, fabricated in planar technology and
encapsulated in the SOD523 (SC-79) ultra small SMD plastic package. The excellent
matching performance is achieved by gliding matching and a Direct Matching Assembly
(DMA) procedure.
1.2 Features and benefits
Excellent linearity
Excellent matching to 2 % DMA
Ultra small SMD plastic package
C
d(28V)
: 2.1 pF; C
d(1V)
to C
d(28V)
ratio: 9
Low series resistance.
1.3 Applications
Electronic tuning in UHF television tuners
Voltage Controlled Oscillators (VCO).
2. Pinning information
Table 1.
Pin
1
2
Pinning
Description
cathode
anode
1
2
sym008
Simplified outline
[1]
Symbol
[1]
The marking bar indicates the cathode.
3. Ordering information
Table 2.
Ordering information
Package
Name
BB179B
SC-79
Description
plastic surface mounted package; 2 leads
Version
SOD523
Type number
NXP Semiconductors
BB179B
UHF variable capacitance diode
4. Marking
Table 3.
BB179B
Marking
Marking code
C
Type number
5. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
V
R
V
RM
I
F
T
stg
T
j
Parameter
reverse voltage
peak reverse voltage
forward current
storage temperature
junction temperature
in series with a
10 k resistor
Conditions
Min
-
-
-
55
55
Max
32
35
20
+150
+125
Unit
V
V
mA
C
C
6. Characteristics
Table 5.
Characteristics
T
j
= 25
C unless otherwise specified.
Symbol
I
R
Parameter
reverse current
Conditions
see
Figure 2
V
R
= 30 V
V
R
= 30 V; T
j
= 85
C
r
s
C
d
diode series
resistance
diode
capacitance
f = 470 MHz
f = 1 MHz;
see
Figure 1
and
3
V
R
= 1 V
V
R
= 28 V
capacitance ratio f = 1 MHz
18.22
1.9
-
-
2.1
1.27
20
2.25
-
pF
pF
[1]
Min
-
-
-
Typ
-
-
0.6
Max
10
200
0.75
Unit
nA
nA
C
d
1V
---------------
-
C
d
2V
C
d
1V
------------------
C
d
28V
C
d
25V
------------------
C
d
28V
C
d
---------
-
C
d
[1]
capacitance ratio f = 1 MHz
8.45
9
10
capacitance ratio f = 1 MHz
-
1.05
-
capacitance
matching
V
R
= 1 V to 28 V; in a
sequence of 10 diodes
(gliding)
-
-
2
%
V
R
is the value at which C
d
= 9 pF
BB179B
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 5 September 2011
2 of 8
NXP Semiconductors
BB179B
UHF variable capacitance diode
24
C
d
(pF)
20
mbk440
16
12
8
4
0
10
−1
1
10
V
R
(V)
10
2
f = 1 MHz; T
j
= 25
C.
Fig 1.
10
3
I
R
(nA)
10
2
Diode capacitance as a function of reverse voltage; typical values.
mlc816
10
−3
mlc815
TC
d
(K
−1
)
10
−4
10
1
0
20
40
60
80
T
j
(°C)
100
10
−5
10
−1
1
10
V
R
(V)
10
2
T
j
= 0
C
to 85
C.
Fig 2.
Reverse current as a function of junction
temperature; maximum values.
Fig 3.
Temperature coefficient of diode capacitance
as a function of reverse voltage; typical
values.
BB179B
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 5 September 2011
3 of 8
NXP Semiconductors
BB179B
UHF variable capacitance diode
7. Package outline
Plastic surface-mounted package; 2 leads
SOD523
A
c
HE
v
M
A
D
A
0
0.5
scale
1 mm
1
E
bp
2
DIMENSIONS (mm are the original dimensions)
UNIT
mm
A
0.65
0.58
bp
0.34
0.26
c
0.17
0.11
D
1.25
1.15
E
0.85
0.75
HE
1.65
1.55
v
0.1
(1)
Note
1. The marking bar indicates the cathode.
OUTLINE
VERSION
SOD523
REFERENCES
IEC
JEDEC
JEITA
SC-79
EUROPEAN
PROJECTION
ISSUE DATE
02-12-13
06-03-16
Fig 4.
Package outline SOD523 (SC-79).
BB179B
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 5 September 2011
4 of 8
NXP Semiconductors
BB179B
UHF variable capacitance diode
8. Revision history
Table 6.
Revision history
Release date
20110905
Data sheet status
Product data sheet
Change notice
-
Supersedes
BB179B v.2
Document ID
BB179B v.3
Modifications:
•
•
•
The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
Legal texts have been adapted to the new company name where appropriate.
Package outline drawings have been updated to the latest version.
Product data sheet
Product specification
-
-
BB179B v.1
-
BB179B v.2
(9397 750 13833)
BB179 v.1
(9397 750 02984)
20041005
19971113
BB179B
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 5 September 2011
5 of 8
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