Renesas Technology Releases Industry's Smallest TV Tuner Variable-Capacitance
Diode for Mobile Phones
Ultra-small 0.6 0.3 (mm) size plus large capacitance ratio at low voltage, for
terrestrial digital TV broadcasts capable mobile phones
Tokyo, July 21, 2005
Renesas Technology Corp. today announced three TV tuner variable-capacitance
diodes ( varicap diodes )*
1
for mobile phones: the RKV650KP featuring the industry's smallest size 0.6
0.3 (mm), and the extended-package RKV650KN and RKV650KL. Sample shipments will begin in Japan
in August 2005.
These new products offer the following features.
(1)
Industry's smallest size (RKV650KP)
At 0.6 mm 0.3 mm 0.3 mm (typ.), the RKV650KP features the industry's smallest size for a TV
tuner varicap diode. This represents an approximately 70% reduction in mounting area compared with
Renesas Technology's previous models for analog TV tuner use, enabling user systems to be made
smaller.
(2)
Large capacitance ratio at low voltage (RKV650KP, RKV650KN, RKV650KL)
These three new products achieve the industry's highest capacitance ratio of 3.5 (in case of
C 0.5/C 2.5)*
2
in the approximately 2.5 V low-voltage range, enabling them to be used in TV tuners
for terrestrial digital TV broadcasts capable mobile phones.
At the same time, the tradeoff high-frequency series resistance*
3
characteristic has been kept down to
0.5 (at VR = 1 V, f = 470 MHz), enabling high sensitivity and low noise to be achieved.
< Product Background >
TV tuner varicap diodes make use of the characteristic whereby capacitance varies when a voltage is
applied, and are actually used to adapt to the radio wave (frequency assigned to a channel) to be received.
While Renesas Technology currently mass-produces TV tuner models for mobile phones with analog
broadcasting capability, TV tuner products supporting terrestrial digital broadcasting (so-called
one-
segment broadcasting) that can be viewed on mobile devices, which will begin in March 2006, require a
high capacitance change ratio in a lower voltage range of around 2.5 V.
At the same time, there is a strong demand for smaller diode dimensions that enable user products to be
made smaller and thinner.
-more-
In response to these needs, Renesas Technology has developed these new TV tuner varicap diodes for
terrestrial digital broadcasting capable mobile phones, featuring a high capacitance change ratio together
with ultra-small dimensions.
<Additional Product Details >
The RKV650KP, RKV650KN, and RKV650KL achieve a large capacitance ratio at a low voltage together
with lower high-frequency series resistance as a result of the PN junction formation process conditions and
epitaxial layer optimization.
The MP6 (Micro Package 6) (Renesas package code) package used by the RKV650KP achieves ultra -small
dimensions of 0.6 mm 0.3 mm 0.3 mm (typ.) through the use of an undersurface electrode structure in
which electrodes are located on the undersurface of the package. The RKV650KN and RKV650KL
extended-package models employ the following packages, allowing a choice of models to suit different
systems.
RKV650KN: 0.8 mm 0.5 mm 0.3 mm (typ.) undersurface electrode structure MP8 (Micro
Package 8) (Renesas package code)
RKV650KL: Lead pin type EFP (Extremely small Flat lead Package) (Renesas package code) with
1.0 (body dimensions of 0.8) mm 0.6 mm 0.47 mm (typ.)
Future plans include the ongoing development of low-voltage varicap diodes for terrestrial digital TV
broadcasts capable mobile phones to extend the product lineup. Strenuous efforts will also be made to
reduce variation characteristics in order to provide diodes offering greater ease of use.
< Notes >
Notes: 1.
Variable-capacitance diode (varicap diode): A diode characterized by variation of its
capacitance in accordance with an applied reverse voltage. Making use of this characteristic,
varicap diodes are used for frequency regulation.
2.
Capacitanceratio of 3.5 (in case of C 0.5/C 2.5): The inter-pin capacitance ratio with reverse
voltages of 0.5 V and 2.5 V. The capacitance change ratio is an important characteristic in
varicap diodes, with a higher figure representing higher performance.
3.
High-frequency series resistance: Parasitic resistance of a varicap diode. A small value of this
resistance makes possible a low unit oscillation stop voltage, low noise, and stable operation.
*
Product names, company names, or brands mentioned are the property of their respective owners.
< Typical Applications >
Digital TV tuners for terrestrial digital TV broadcasts capable mobile phones, etc.
< Prices in Japan > *For Reference
Product Name
Package (Renesas Package Code)
Sample Price [ Tax Included ] (Yen)
RKV650KP
MP6
15 [16]
RKV650KN
MP8
13 [14]
RKV650KL
EFP
12 [13]
-more-
< Specifications >
Product
Name
Package
(Renesas
Package Code)
Maximum
Ratings
Reverse
Voltage
VR
Inter-Pin
Capacitance
C
Capacitance
Change Ratio
n
High-Frequency
Series
Resistance
rs
RKV650KP
MP6
15 V
RKV650KN
MP8
15 V
RKV650KL
EFP
15 V
C0.5 = 7.0 to 8.5 pF
C2.5 = 1.9 to 2.3 pF
3.5 typ.
0.5
typ.
(at VR = 1 V,
f = 470 MHz)
Information contained in this news release is current as of the date of the press announcement, but may be
subject to change without prior notice.
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