BB174
VHF variable capacitance diode
Rev. 1 — 25 March 2013
Product data sheet
1. Product profile
1.1 General description
The BB174 is a variable capacitance diode, fabricated in planar technology, and
encapsulated in the SOD523 (SC-79) ultra small SMD plastic package.
1.2 Features and benefits
Excellent linearity
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
Voltage Controlled Oscillators (VCO)
2. Pinning information
Table 1.
Pin
1
2
Pinning
Description
cathode
anode
[1]
Simplified outline
Symbol
1
2
sym008
[1]
The marking bar indicates the cathode.
3. Ordering information
Table 2.
Ordering information
Package
Name
BB174
SC-79
Description
plastic surface-mounted package; 2 leads
Version
SOD523
Type number
NXP Semiconductors
BB174
VHF variable capacitance diode
4. Marking
Table 3.
BB174
Marking
Marking code
CF
Type number
5. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
V
R
I
F
T
stg
T
j
reverse voltage
peak value in series with a 10 k resistor
forward current
storage temperature
junction temperature
Conditions
Min Max
-
-
-
30
35
20
Unit
V
V
mA
55
+150
C
55
+125
C
6. Characteristics
Table 5.
Characteristics
T
j
= 25
C unless otherwise specified.
Symbol
I
R
r
s
C
d
Parameter
reverse current
Conditions
V
R
= 30 V
V
R
= 30 V; T
j
= 85
C
diode series resistance f = 470 MHz; C
d
= 9 pF
diode capacitance
f = 1 MHz
V
R
= 1 V
V
R
= 28 V
C
d(1V)
/C
d(2V)
C
d(1V)
/C
d(28V)
diode capacitance ratio f = 1 MHz
(1 V to 2 V)
diode capacitance ratio f = 1 MHz
(1 V to 28 V)
[2]
[1]
[1]
Min
-
-
-
Typ
-
-
0.6
Max
10
200
0.75
Unit
nA
nA
18.22 -
1.951 2.1
-
8.45
-
21.26 pF
2.225 pF
1.27 -
9
10.9
C
d(25V)
/C
d(28V)
diode capacitance ratio f = 1 MHz
(25 V to 28 V)
[1]
[2]
See
Figure 2.
See
Figure 1
and
Figure 3.
1.05 -
BB174
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 1 — 25 March 2013
2 of 8
NXP Semiconductors
BB174
VHF 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.
001aae541
10
−2
TC
Cd
(K
−1
)
10
−3
001aag774
10
10
−4
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.
Diode capacitance temperature coefficient as a
function of reverse voltage; typical values.
BB174
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 1 — 25 March 2013
3 of 8
NXP Semiconductors
BB174
VHF 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)
BB174
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 1 — 25 March 2013
4 of 8
NXP Semiconductors
BB174
VHF variable capacitance diode
8. Abbreviations
Table 6.
Acronym
SMD
VHF
Abbreviations
Description
Surface Mounted Device
Very High Frequency
9. Revision history
Table 7.
BB174 v.1
Revision history
Release date
20130325
Data sheet status
Product data sheet
Change notice
-
Supersedes
-
Document ID
BB174
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 1 — 25 March 2013
5 of 8
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