SP507CF datasheet(21/30 Pages) SIPEX

21 / 30 page

SP505/6/7APN/03

SP505, SP506, SP507 Application Note

SP506 and SP507 Evaluation Boards

For easy bench testing of the SP506 and SP507,

evaluation boards are available. Similar to the

SP505EB, the SP506EB and SP507EB offers a

"breakout" type configuration that allows the user to

access the driver's and receiver's I/Os. The evaluation

boards have a DB-25 serial connector that is

configured to a EIA-530 DTE pinout. This connector

can be used to analyze any of the serial standards

offered in the SP506 and SP507. Translation cables

may be needed from the DB-25 to the appropriate

connector. Refer to Figure 1 or the cabling schemes

in the Design Guide for Multi-Protocol Serial Ports.

Refer to the SP504/SP505 Evaluation Board Manual

for the SP506EB.

For the SP507EB, the probe pins or access points are

arranged such that the drivers are on one side and the

receivers are on the other. Each driver has three basic

access points: the TTL input, inverting analog

output, and non-inverting analog output. Additional

access points are included for the driver outputs, thus

a total of four access points for each driver. Similarly

with the receiver with two analog inputs, inverting

and non-inverting, and the TTL output. Receiver

inputs have additional access points for convenience.

There are additional ground points for convenient

resistor or capacitor load connections to the driver

output access points. There are also receiver ground

points for convenience at each receiver.

The TTL control lines have DIP switches that allow

the user to input a signal to enter a logic HIGH or

logic LOW. The control lines include the driver and

receiver enable lines and the mode select pins.

For the SP506EB, the driver enable inputs are

active LOW and have internal pull down resistors.

The DIP switch position will either tie the inputs to a

logic HIGH or leave the input open where the internal

pull-down defines a LOW state.

For the SP507EB, the SP507 uses a logic HIGH for

its driver enable lines except for the LL driver, which

Figure 36. SP507EB Schematic

27 26

D1 = MBRS140T3 Schottky Rectifier

VCC

VDD

C1-

C2-

VSS

C1+

C2+

SP507CF

TxD

µF

STEN

RREN

RTEN

TMEN

SCTEN

LLEN

RLEN

TTEN

LATCH

GND

DB-25 Connector Pins & Signals [DTE]

SD(a)

TR(a)

TR(b)

RS(b)

RS(a)

TT(b)

LL(a)

SCT(a)

SCT(b)

TT(a)

RD(a)

CS(b)

DM(a)

DM(b)

RT(b)

CS(a)

RT(a)

RR(a)

RR(b)

SIGNAL GND

Mode Selection

M2 M1

Physical Layer

V.11 (RS-422)

EIA-530A

EIA-530

X.21

V.35

RS-449 (V.36)

RS-232

SHUTDOWN

Mode

Enable

TERM_OFF

TM(a)

RL(a)

1 SHIELD GND

DTR

RTS

TxC

DCE_ST

RxD

RxC

CTS

DSR

DCD

DTE_ST

VCC

25 33 41 48 55 62 73 74

OFF

LATCH

TERM_OFF

OFF

GND located next to each

driver output & receiver input

C1 C2

C1 ~ C4 = 22

µF Kemet T491C226K016AS

Decoupling Capacitor = 10

µF Kemet T351C106K10AS301

FUSE, jumper or

50ohm 1/4W resistor

RL(b)

LL(b)

ST(a)

ST(b)

TM(b)

SP507 Evaluation Board

Customer :

Title :

Date :

Doc. # :

Rev.

Original : June 9, 1999

Reference Design Schematic

233 South Hillview Dr. • Milpitas, CA. 95035

Sipex Corporation

TEST308

Orig.:

Chkd.:

Appr.:

Zeferino Cervantes

John Ng

Kim Y. Lee

GND

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