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TGoddard/SP333/9617R0

SP333 RS-232/AppleTalk Programmable Transceiver

© Copyright 2000 Sipex Corporation

SP333

+5V Only RS-232/AppleTalk™ Programmable Transceiver

s +5V Only, Single Supply Operation

s Low Power Shutdown

s 28-Pin SOIC Packaging

s 3 Drivers, 5 Receivers – RS-232

s Complete AppleTalk™ Interface

s High Data Rates

10Mbps Differential Transceivers

460kbps Single-Ended Transceivers

DESCRIPTION…

The SP333 is a monolithic device that supports both Macintosh™ and PC serial interfaces.

RS-232 mode offers three (3) RS-232 drivers and five (5) RS-232 receivers. Mac mode

includes a differential driver and a single-ended inverting driver. Receivers in Mac mode

include one differential receiver, one non-inverting single-ended receiver and one inverting

single-ended receiver. An on-chip charge pump allows +5V-only operation, and a low power

Shutdown mode makes the SP333 ideal for battery powered applications. The interface mode

can be changed at any time by a mode select pin.

+5V

5

0V

V

CC

25

9

12

10

0.1

µF

0.1

µF

14

26

11

13

0.1

µF

0.1

µF

C2-

C2+

V+

V-

Shutdown

RS-232/MacMode

TI1

TX1

27

6

T1

TI2

TX2

28

7

T2

TI3

TX3

1

4

T3

RX1

RI1

19

15

R1

RX2

RI2

20

16

R2

RX3

RI3

21

17

R3

RX4

RI4

22

18

R4

RX5

RI5

23

24

R5

RXEN

GND

3

8

+5V

5

+5V

V

CC

25

9

12

10

0.1

µF

0.1

µF

14

26

11

13

0.1

µF

0.1

µF

C2-

C2+

V+

V-

Shutdown

RS-232/MacMode

TI1

TX1

27

6

T1

TXEN

TX2

2

7

TI3

TX3

1

4

T3

RX1

19

R1

RI2 16

R3

RX3

RI3

21

17

RX5

RI5

23

24

R5

GND

3

8

RI1 15

PC Mode

Mac Mode

RXEN

SP333

SP333

®