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| 型號(hào)： | SP504AN |
| 英文描述： | Application Note |
| 中文描述： | 應(yīng)用筆記 |
| 文件頁數(shù)： | 17/31頁 |
| 文件大小： | 257K |
| 代理商： | SP504AN |
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17
Rev: A Date:1/27/04
SP504 Multi–Mode Serial Transceivers
Copyright 2004 Sipex Corporation
tory for more information). The drivers are
controlled with the data bits labeled TDEC
–
TDEC
. 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 150
pull-down resistor to ground con-
nected at the (b) output. This resistor is part of
the V.35 driver circuitry and should be con-
nected when in V.35 mode. Tri-state is possible
for all drivers in RS-232 mode. The receivers
are controlled with data bits RDEC
–RDEC
0
;
the code 0000 written to the receivers will place
the outputs into tri-state mode. The 0000 de-
coder 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 18) is a logic HIGH ("1")
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
18 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 simi-
lar to the
SP504
receiver outputs. This feature
would reduce additional logic required by older
traditional methods.
NET1/NET2 Testing and Compliancy
Many system designers are required to certify
their system for use in the European public
network. Electrical testing is performed in ad-
herence 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 NET1
and NET2. Consult factory for details.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP504CF | Application Note |
| SP504EB | Evaluation Board Manual |
| SP504MCF | WAN Multi-Mode Serial Transceiver |
| SP505 | WAN Multi-Mode Serial Transceiver |
| SP505AB | WAN Multi-Mode Serial Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP504CF | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Application Note |
| SP504EB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP50-4G | 制造商:Aavid Thermalloy 功能描述: |
| SP504MCF | 制造商:Exar Corporation 功能描述: 制造商:Exar Corporation 功能描述:Line Transceiver, 7-Driver, 7-Receiver, 80 Pin, Plastic, QFP |
| SP504MCF-L | 制造商:Exar Corporation 功能描述:TRANSCEIVER MULTIPROTOCOL SERIAL 制造商:Exar Corporation 功能描述:IC, WAN MULTIMODE SERIAL TXRX, MQFP-80; Device Type:Transceiver; IC Interface Type:RS232, RS422, RS449, RS485, EIA530, EIA530A; No. of Drivers:7; Supply Voltage Min:4.75V; Supply Voltage Max:5.25V; Driver Case Style:MQFP ;RoHS Compliant: Yes |
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