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Rev: A Date:1/27/04

SP504 Multi–Mode Serial Transceivers

© Copyright 2004 Sipex Corporation

The SP504 is a single chip device that supports eight (8) physical serial interface standards

for Wide Area Network Connectivity. The SP504 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 SP504 is suited for DTE–DCE

applications. The SP504 requires only one external resistor per V.35 driver for compliant V.35

operation.

DESCRIPTION...

■ +5V Only

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

■ Driver and Receiver Tri-State Control

■ Reduced V.35 Termination Network

■ Pin Compatible with the SP503

■ Software Selectable Interface Modes:

-RS-232E (V.28)

-RS-422A (V.11, X.21)

-RS-449 (V.11 & V.10)

-RS-485

-V.35

-EIA-530 (V.11 & V.10)

-EIA-530A (V.11 & V.10)

-V.36

SWITCHABLE V.35

TERMINATION RESISTOR

NETWORKS

RxD

RXC

CTS

DSR

DCD

RI

SCT

TxD

DTR

RTS

RL

LL

ST

TT

SP504

WAN Multi-Mode Serial Transceiver

®

Driver Decode

Receiver Decode

Programmable Charge Pump

Vss

SP504

SP504

Vcc

Vdd

C1+

C1-

C2+

C2-

22µF, 16V

22µF, 16V

TxD

DTR

RTS

RL

LL

RxD

RxC

CTS

DSR

DCD

RI

SCT

TT

ST

22µF, 16V

22µF, 16V