1

Rev. 7/9/03

SP505 Multi–Mode Serial Transceiver

© Copyright 2003 Sipex Corporation

The SP505 is a monolithic device that supports eight (8) popular serial interface standards for DTE to

DCE connectivity. The SP505 is fabricated using a low power BiCMOS process technology, and

incorporates a Sipex patented (5,306,954) charge pump allowing +5V only operation. Seven (7) drivers

and seven (7) receivers can be configured via software for any of the above interface modes at any time.

The SP505 requires no additional external components for compliant operation for all of the eight (8)

modes of operation. All necessary termination is integrated within the SP505 and is switchable when

V.35 drivers, V.35 receivers, and V.11 receivers are used. The SP505 can operate as either a DTE or DCE.

Additional features with the SP505 include internal loopback that can be initiated in either single-ended

or differential modes. While in loopback mode, driver outputs are internally connected to receiver inputs

creating an internal signal path convenient for diagnostic testing. This eliminates the need for an external

loopback plug. The SP505 also includes a latch enable pin with the driver and receiver address decoder.

Tri-state ability for the driver and receiver outputs is controlled by supplying a 4-bit word into the address

decoder. Seven (7) drivers and one (1) receiver in the SP505 include separate enable pins for added

convenience. The SP505 is ideal for WAN serial ports in networking equipment such as routers,

switches, DSU/CSU's, and other access devices.

SP505

WAN Multi-Mode Serial Transceiver

DESCRIPTION...

■ +5V Only Operation

■ Seven (7) Drivers and Seven (7) Receivers

■ Driver and Receiver Tri-state Control

■ Internal Transceiver Termination Resistors for

V.11 and V.35 Protocols

■ Loopback Self-Test Mode

■ Software Selectable Protocol Selection

■ Interface Modes Supported:

■ Improved ESD Tolerance for Analog I/Os

■ High Differential Transmission Rates

➥ SP505A - 10Mbps

➥ SP505B - over 16Mbps

■ Compliant to NET1/2 and TBR2 Physical

Layer Requirements

(TUV Test Report NET2/052101/98)

(TUV Test Report CTR2/052101/98)

EIA-530

WAN

V.35

®