SP330E datasheet(8/23 Pages) EXAR

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SP330E

RS-232/RS-485/RS-422 TRANSCEIVER WITH 1.65V-5.5V INTERFACE

REV. 1.0.0

PIN DESCRIPTIONS

Name

RS-232

RS-485 Full Duplex

RS-485 Half Duplex

C1+

Charge pump cap 1 positive lead, 0.1µF

Logic Supply for TTL Inputs and Outputs, VL = +1.65V to +5.5V or tie to VCC

VCC

Main Supply, VCC = +3.0V to +5.5V, bypass to ground with 1.0µF

C1-

Charge pump cap 1 negative lead

GND

Ground

T1OUT, B/Z

Transmitter 1 Output

Z Driver Neg Output

B/Z Neg Input/Output

T2OUT, A/Y

Transmitter 2 Output

Y Driver Pos Output

A/Y Pos Input/Output

R1OUT

Receiver 1 Output

R2OUT, RO

Receiver 2 Output

Receiver TTL Output

SHDN

Low power shutdown mode when low

SLEW

Data rate limited to 250kbps when low

RS-485/RS-232

HALF/FULL

GND

Ground

R2IN, A

Receiver 2 Input

A Pos Receiver Input

R1IN, B

Receiver 1 Input

B Neg Receiver Input

Receiver enabled when low

T2IN, DE

Transmitter 2 Input

Driver enabled when high

T1IN, DI

Transmitter 1 Input

Driver TTL Input

V-

Charge pump negative supply, 0.1µF from ground

C2-

Charge pump cap 2 negative lead

C2+

Charge pump cap 2 positive lead, 0.1µF

V+

Charge pump positive supply, 0.1µF to ground

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