SP508_05 Datasheet, PDF (1/30 Pages) Sipex Corporation – Rugged 20Mbps, 8 Channel Multi-Protocol Transceiver with Programmable DCE/DTE and Termination Resistors

®
SP508
Rugged 20Mbps, 8 Channel Multi-Protocol Transceiver
with Programmable DCE/DTE and Termination Resistors
FEATURES
■ 20Mbps Differential Transmission Rates
Now Available in Lead Free Packaging
■ 15kV ESD Tolerance for Analog I/Os
Refer to page 7 for pinout
■ Internal Transceiver Termination Resistors
for V.11/V.35
■ Interface Modes:
✓ RS-232 (V.28)
✓ X.21 (V.11)
✓ RS-449/V.36
(V.10 & V.11)
✓ EIA-530 (V.10 & V.11)
✓ EIA-530A (V.10 & V.11)
✓ V.35
■ Software Selectable Protocols with 3-Bit Word
■ Eight Drivers and Eight Receivers
■ V.35/V.11 Receiver Termination Network
Disable Option
■ Easy Flow-Through Pinout
■ +5V Only Operation
■ Individual Driver/Receiver Enable/Disable Controls
■ Operates in DTE or DCE Mode
APPLICATIONS
■ Router
■ Frame Relay
■ CSU
■ DSU
■ Internal Line or Digital Loopback Testing
■ PBX
■ Adheres to NET1/NET2 and TBR-2 Requirements ^{■ Secure Communication Terminals}
DESCRIPTION
The SP508 is a monolithic device that supports eight (8) popular serial interface standards for
Wide Area Network (WAN) connectivity. The SP508 is fabricated using a low power BiCMOS
process technology, and incorporates a Sipex regulated charge pump allowing +5V only
operation. Sipex's patented charge pump provides a regulated output of +5.8V, which will
provide enough voltage for compliant operation in all modes. Eight (8) drivers and eight (8)
receivers can be configured via software for any of the above interface modes at any time. The
SP508 requires no additional external components for compliant operation for all of the eight
(8) modes of operation other than four capacitors used for the internal charge pump. All
necessary termination is integrated within the SP508 and is switchable when V.35 drivers and
V.35 receivers, or when V.11 receivers are used. The SP508 provides the controls and
transceiver availability for operating as either a DTE or DCE.
Additional features with the SP508 include internal loopback that can be initiated in any of the
operating modes by use of the LOOPBACK pin. While in loopback mode, receiver outputs are
internally connected to driver inputs creating an internal signal path bypassing the serial
communications controller for diagnostic testing. The SP508 also includes a latch enable pin
with the driver and receiver address decoder. The internal V.11 or V.35 receiver termination
can be switched off using a control pin (TERM_OFF) for monitoring applications. All eight (8)
drivers and receivers in the SP508 include separate enable pins for added convenience. The
SP508 is ideal for WAN serial ports in networking equipment such as routers, access
concentrators, network muxes, DSU/CSU's, networking test equipment, and other access
devices.
Applicable U.S. Patents-5,306,954; and others patents pending
Date: 1/19/05
SP508 Enhanced WAN Multi–Protocol Serial Transceiver
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© Copyright 2005 Sipex Corporation