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| 型號： | SP322CF |
| 英文描述： | Programmable V.11/V.35 Transceiver |
| 中文描述： | 可編程V.11/V.35收發(fā)器 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 318K |
| 代理商： | SP322CF |
Rev. 7/9/03
SP322 V.11/V.35 Serial Transceiver
11
Copyright 2003 Sipex Corporation
Termination Circuitry
Unique to
Sipex
, the
SP322
provides internal
resistor networks for V.35 as well as the cable
termination for V.11. The resistor network for
the V.35 receivers are configured as a typical
V.35 receiver using two 51
resistors in series
tied to the A and B inputs with a 124
center-tap
resistor to ground. The network is internally
switched on during V.35 mode (V.11/V.35 =
V
) using high performance, low r
transis-
tors. The transistors can operate efficiently over
+7V to -7V, and can tolerate over +10V to -10V
without damage. This termination provides the
proper V.35 receiver input impedance of 100
and short-circuit impedance at 2V of 150
with
10% accuracy.
The configuration for the V.11 receiver input
resistor network is similar to the V.35 network
except that the 124
resistor is disconnected
(V.11/V.35 = 0V). A series resistor is also
added increase the input impedance to over
120
for the V.11 cable termination. The
minimum resistance per the ITU V.11 specifica-
tion is 100
. The V.11 termination can be
switched off using the V.11_TERM pin. For a
terminated V.11 receiver, this pin is at a logic
"1". A logic "0" will inform the switches to
disconnect the V.11 termination.
Shutdown
The
SP322
includes a shutdown pin (SD) which
disables the charge pump and all power con-
suming circuitry to provide low I
. A logic "1"
to the SD pin will shut down the
SP322
where it
will draw less than 20
μ
A of current.
NET1/2 European Compliancy
As with all of
Sipex's
previous multi-protocol
transceiver ICs, the
SP322
drivers and receivers
have been designed to meet all electrical
specifications for ITU V.11 and V.35.
Furthermore, it is internally tested and will pass
the NET1/2 physical layer testing requirements.
Please note that although the SP322 adheres to
NET1/2 testing, any complex or unusual
configuration should be double-checked to
ensure NET compliance. Consult factory for
details.
Applications Information
The
SP322
is designed for serial port applica-
tions needing V.11 and V.35 transceivers. The
SP322
supports a variety of physical layer
protocols such as EIA-530, EIA-530A, RS-449,
and V.36 where V.11 transceivers are used for
clock and data signals. The termination resistors
are recommended for crosstalk and reflections
elimination under higher speed operation.
Internal termination solves many headaches and
configuration hassles with implementing V.11
and V.35. The
SP322
provides a simple, low-
cost solution for the clock and data lines for
synchronous serial ports. The handshaking lines
such as CTS, DTR, etc. can be implemented
using discrete RS-422 or RS-232 transceivers,
depending on the mode supported.
Sipex
supplies either differential (V.11) or single-
ended (V.28) discrete transceiver products
to mate with the
SP322
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP322CF-L | 功能描述:外圍驅(qū)動器與原件 - PCI PROGRAMMABLE V.11/V.35 W/INT TERM RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| SP3231W-SM | 制造商:Panasonic Industrial Company 功能描述:SERVICE MANUAL |
| SP3232 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:3.3V, 1000 Kbps RS-232 Transceivers |
| SP3232B | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:True +3.0V to +5.5V RS-232 Transceivers |
| SP3232BCA | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:True +3.0V to +5.5V RS-232 Transceivers |
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