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參數(shù)資料
| 型號： | 49XX |
| 英文描述： | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 中文描述： | 49xx系列產(chǎn)品簡介|射頻調(diào)諧器模塊 |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 517K |
| 代理商： | 49XX |
49
XX
S
ERIES
RF T
UNER
M
ODULES
C
ABLE
M
ODEM AND
D
IGITAL
A
PPLICATIONS
Product Brief
M I C R O T U N E
The 49xx Series RF Tuner
Modules are specifically
designed for subscriber-side
cable modem applications.
Downstream signal frequencies
range from 50 MHz to 860 MHz
(US) and 70 MHz to 862 MHz
(EU). Upstream signal
frequencies range from 5 MHz to
42 MHz (US) and 5 MHz to
65 MHz (EU).
The receivers use a three-band
single-conversion approach, with
a 43.75 MHz (US) or 36.125 MHz
(EU) output frequency. A second
conversion to 5.75 MHz (US) or
7.125 MHz (EU) is available for
QAM demodulators requiring a
lower IF center frequency.
Downstream band selection and
tuning is done via I
2
C bus while a
separate, three-wire bus and
transmit enable control the
upstream amplifier.
Two gain-control inputs (RF+IF)
are available to adjust the output
signal level. The tuner IF output
is designed to drive a low-pass
image-reject filter prior to the
QAM demodulator IC.
A DC/DC converter for 33V
generation is built in, so that only
a single supply voltage of 5V is
required.
The common antenna
input/output is realized by an F-
connector (75
) per [IPS-sp-
406].
APPLICATIONS
Cable modems (CM)
Cable telephony
Digital cable systems
FEATURES
Input frequency ranges:
50 MHz to 860 MHz (US)
70 MHz to 862 MHz (EU)
DOCSIS, EuroDOCSIS, and
DVB compliant
Contains an IF SAW filter, IF
amplifier, and optional second
downconversion to near
baseband IF
Contains a diplex filter and
digitally-programmable-gain
amplifier in the upstream path
Downstream tuner functions
controlled by I
2
C bus
Single 5V supply
Antenna input: F-connector
Horizontal mounting
Dimensions (l x h x d):
66 x 39 x 14 mm
Modules can be implemented with different sockets,
filters, interfaces, connectors, and other customizable
options within the same pinouts
.
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