SP301CS Ver la hoja de datos (PDF) - Signal Processing Technologies

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componentes Descripción

Fabricante

SP301CS

RS-232/RS-422 Line Drivers/Receivers

Signal Processing Technologies 

shown in these figures, the loopback function

internally connects the driver outputs to the

corresponding receiver inputs, and switches the

output pin to a resistive divider of 10kΩ nominal

impedance from VEE to ground. Receiver out-

puts are left active for signal verification.

During loopback, the receiver inputs are tied to

ground via a 5kΩ pulldown resistor. To mini-

mize loopback errors, the receiver inputs must

be limited to ±10V swings.

SP301 CONFIGURATIONS IN LOOPBACK MODE

One-Channel Full Duplex RS-232 &

One-Channel Full Duplex RS-422

Opposite Drivers

Two-Channel Full Duplex RS-422

10k

VEE 10k

TIA

RS-422 LINE DRIVER

RS-422 RECEIVER

ROA

TOA2

TOA1

10k

10k VEE

RIA1

RIA2

TIB

RS-232 LINE DRIVER

RS-232 RECEIVER

ROB

TOB1

10k

VEE

10k

RIB1

SELECT A = 1

SELECT B = 0

LB = 0 (ACTIVE)

10k

VEE 10k

TIB

RS-422 LINE DRIVER

RS-422 RECEIVER

ROB

10k

VEE

10k

TIA

RS-422 LINE DRIVER

RS-422 RECEIVER

ROA

SELECT A = 1

SELECT B = 1

LB = 0 (ACTIVE)

TOB1

TOB2

10k

10k VEE

RIB2

RIB1

TOA1

TOA2

10k

10k VEE

RIA2

RIA1

64

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SIGNAL PROCESSING EXCELLENCE

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