SP303 datasheet(3/8 Pages) SIPEX

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SIGNAL PROCESSING EXCELLENCE

PINOUT

PIN ASSIGNMENTS – RS232 MODE

Pin 1 — V

DD — +12V Power Supply.

Pin 2 — R

INA2 — DSR; RS-232 input.

Pin 3 — R

INA1 — RXD; RS-232 input.

Pin 4 — N.C. — No Connection.

Pin 5 — T

OUTA2 — RTS; RS-232 output.

Pin 6 — T

OUTA1 — TXD; RS-232 output.

Pin 7 — SEL A — Select A; used with Select B

(pin 8) to select operating mode. Logic “0” on

both SEL A and SEL B selects RS-232 mode;

logic “1” on both SEL A and SEL B selects

AppleTalk™ mode.

Pin 8 — SEL B — Select B; used with Select A

(pin 7) to select operating mode. Logic “0” on

both SEL A and SEL B selects RS-232 mode;

logic “1” on both SEL A and SEL B selects

AppleTalk™ mode.

Pin 9— T

OUTB1— DTR; RS-232 output.

Pin 10 — T

OUTB2 — Rl; RS-232 output.

Pin 11 — N.C. — No Connection.

Pin 12— R

INB1— CTS; RS-232 input.

Pin 13 — N.C. — No Connection.

Pin 14 — GND — Signal ground. Connected to

logic and chasis ground.

Pin 15 — V

EE — –12V Power Supply.

Pin 16 — N.C. — No Connection.

Pin 17 — R

OUTB1 — CTS; TTL Output to

UART.

Pin 18 — N.C. — No Connection.

Pin 19 — T

OUTB2 — Rl;

TTL input from

UART.

Pin 20 — T

INB1 — DTR; TTL

input from

UART.

Pin 21 — N.C. — No Connection.

Pin 22 — TxEN — Transmit Enable; Only

functional in Mac Mode.

Pin 23 — T

INA1 — TXD; TTL

input from

UART.

Pin 24 — N.C. — No Connection.

Pin 25 — N.C. — No Connection.

SPECIFICATIONS

MIN ≤TA ≤TMAX and nominal supply voltages unless otherwise noted)

PARAMETER

MIN.

TYP.

MAX.

UNIT

CONDITIONS

ENVIRONMENTAL AND MECHANICAL

Operating Temperature

+70

°C

Storage Temperature

–65

+150

°C

Package

28–pin SOIC

Note:

RS-232 Mode, SELA = SELB = GND.

OUT from +3V to –3V or –3V to +3V.

Macintosh™ AppleTalk™ Mode, SELA = SELB = +5V.

Leakage current specification applies to both TxDO– and TxDO+; T

A=+25°C only.

From 10% to 90% of steady state.

This is an absolute maximum rating. Normal operating levels are V

IN ≤ 5V.

VDD

RINA2

RINA1

N.C.

TOUTA2

TOUTA1

SELECTA

SELECTB

TOUTB1

TOUTB2

N.C.

RINB1

RINB2

GND

VCC

ROUTA2

ROUTA1

N.C.

TINA2

TINA1

TXEN

N.C.

TINB1

TINB2

N.C.

ROUTB1

ROUTB2

VEE

SP303

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