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Designing with the
SP505, SP506, & SP507
Multi-Protocol
Serial Transceivers
The
SP50x
family of multi-protocol transceivers are
designed for applications using serial ports in
networking equipment such as routers, DSU/CSUs,
multiplexors, access devices, and other networking
equipment. This application note discusses and
illustrates various configuration options, and other
helpful hints about designing with the
SP505
and the
newer
SP506
and
SP507
products.
These one-chip serial port transceiver products
supports seven popular serial interface standards for
Wide Area Network (WAN) connectivity. With a
built-in DC-DC charge pump converter, the
SP505,
SP506
and
SP507
operate on +5V only. The seven
drivers and seven receivers can be configured via
software for RS-232, X.21, EIA-530, EIA-530A,
RS-449, V.35, and V.36 interface modes at any time.
Unlike other discrete solutions or other multi-chip
transceivers, the
SP505, SP506
and
SP507
require
no additional external circuitry for compliant
operation other than the charge pump capacitors.
All necessary resistor termination networks are
integrated within the
SP505, SP506
and
SP507,
and
are switchable when in EIA-530, EIA-530A, RS-449,
V.35, V.36, and X.21 modes.
The
SP505, SP506
and
SP507
provide individual
driver disable for easy DTE/DCE configurations.
The
SP507
offers four receiver enable lines for even
easier DTE/DCE programmability. The newer
SP506
is pin compatible with the
SP505
except with
improved AC performance. Refer to the
SP505, SP506
and
SP507
datasheets for electrical parameter and
configuration details.
SP505/6/7APN/03
SP505, SP506, SP507 Application Note
漏 Copyright 2000 Sipex Corporation
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