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參數(shù)資料
| 型號： | SP504MCM-L |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX WAN MULTI-MODE 80LQFP |
| 標準包裝： | 84 |
| 類型： | 收發(fā)器 |
| 驅(qū)動器/接收器數(shù)： | 7/7 |
| 規(guī)程： | 多協(xié)議 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 80-LQFP |
| 供應(yīng)商設(shè)備封裝： | 80-LQFP（14x14） |
| 包裝： | 托盤 |
| 其它名稱： | 1016-1682 SP504MCM-L-ND |
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Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP504_02_2708
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP504_02_2708
may represent other interface modes not
specified (consult the factory for more in-
formation). The drivers are controlled with
the data bits labeled TDEC
3–TDEC0. All of
the drivers can be put into tri-state mode
by writing 0000 to the driver decode switch.
The three drivers TxD, ST and TxC, have a
150pull-downresistortogroundconnected
at the (b) output. This resistor is part of the
V.35drivercircuitryandshouldbeconnected
when in V.35 mode. Tri-state is possible for
all drivers in RS-232 mode. The receivers
are controlled with data bits RDEC
3–RDEC0;
the code 0000 written to the receivers will
place the outputs into tri-state mode. The
0000 decoder word will override the enable
control line for the one receiver (SCT).
Using the V.35_STAT Pin
The
SP504 includes a V.35 status pin where
the V35_STAT pin (pin 8) is a logic HIGH
("") when the decoder is set to V.35 mode.
The pin is a logic LOW ("0") when in all other
modes including tri-state (decoder set at
"0000"). Pin 8 allows the user to easily
add FET switches or solid state relays to
connect the external 150 resistor for V.35
operation. V35_STAT can be connected to
the gate of the FET switches or the control
of the relays so that the 150 resistors are
connected to the non-inverting output of the
three V.35 drivers. The output current of the
V35_STAT pin is that of a typical TTL load
of –3.2mA. The electrical specifications
are similar to the
SP504 receiver outputs.
This feature would reduce additional logic
required by older traditional methods.
NET/NET2 Testing and Compliancy
Manysystemdesignersarerequiredtocertify
their system for use in the European public
network. Electrical testing is performed in
adherence to the NET (Norme Européenne
de Télécommunication) which specifies the
ITU Series V specifications. The
SP504
adheres to all the required physical layer
testing for NET and NET2. Consult factory
for details.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
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