1

Rev. 7/10/03

SP522 Multi–Mode Serial Transceivers

© Copyright 2003 Sipex Corporation

The SP522/524 is a monolithic device that supports three serial interface standards for Wide

Area Network Connectivity. The SP522/524 is ideally suited for multi-protocol designs that are

cost and space sensitive. The SP522/524 is fabricated using a low power BiCMOS process

technology. Two (2) drivers and two (2) receivers for the SP522 can be configured via software

for any of the above interface modes at any time. The SP524 offers two (2) additional drivers

and two (2) additional receivers.

■ SP522 — 2 Drivers and 2 Receivers

■ SP524 — 4 Drivers and 4 Receivers

■ Driver and Receiver Tri-State Control

■ Low-Cost WAN Solution

■ Loopback Function for Diagnostics

■ Software Selectable Interface Modes:

-RS-232 (V.28), RS-423 (V.10)

-RS-422 (V.11, X.21), RS-485

DESCRIPTION

SP522/SP524

Low-Cost Programmable

Multi-Protocol Transceivers

®

T1IN

24

T1

T1OUTA

22

17

T2IN

25

T2

18

R1INA

44

R1OUT

43

R2OUT

T1OUTB

T2OUTA

T2OUTB

R1INB

R2INA

R2INB

10µF

28

10µF

+5V

10µF

14

ENT1

ENT2

ENR1

ENR2

SP524

DP0

DP1

LATCH_EN

LOOPBCK

DECODER LOGIC

40

36

35

39

20

3

4

5

6

31

32

30

23

T3IN

26

T3

T3OUTA

16

11

T4IN

27

T4

13

R3INA

42

R3OUT

41

R4OUT

T3OUTB

T4OUTA

T4OUTB

R3INB

R4INA

R4INB

ENT3

ENT4

ENR3

ENR4

38

34

33

37

15

7

8

9

10

GND

12

121

2

19

29

+

GND

GND

R2

R1

R3

R4

IN5819

T1IN

10

T1

T1OUTA

11

16

GND

14

T2IN

9

T2

15

R1INA

1

R1OUT

24

R2OUT

T1OUTB

T2OUTA

T2OUTB

R1INB

R2INA

R2INB

10µF

21

10µF

22

+5V

10µF

13

+

ENT1

ENT2

ENR1

ENR2

SP522

DP0

DP1

LATCH_EN

LOOPBCK

DECODER LOGIC

5

6

4

3

12

18

17

20

19

8

7

2

23

R1

R2

1N5819