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050202

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple

revisions of any device may be simultaneously available through various sales channels. For information about device errata,

click here: http://www.maxim-ic.com/errata.

FEATURES

§ Generates and detects digital patterns for

analyzing and trouble-shooting digital

communications systems

§ Programmable polynomial length and

feedback taps for generation of any

pseudorandom patterns up to 2

taps can be used in the feedback path

§ Programmable, user-defined pattern registers

for long repetitive patterns up to 512 bytes in

length

§ Large 48-bit count and bit error count registers

§ Software-programmable bit error insertion

§ Fully independent transmit and receive paths

§ 8-bit parallel-control port

§ Detects polynomial test patterns in the

presence of bit error rates up to 10

-2

§ Programmable for serial, 4-bit parallel, or 8-bit

parallel data interfaces

§ Serial mode clock rate is 155MHz; byte mode

is 80MHz for a net 622Mbps; OC-3

§

Available in 44-pin PLCC

ORDERING INFORMATION

DS2174Q

44-Pin PLCC

0°C to +70°C

DS2174QN

44-Pin PLCC -40°C to +85°C

PIN ASSIGNMENT

APPLICATIONS

§ Routers

§ Channel Service Units (CSUs)

§ Data Service Units (DSUs)

§ Muxes

§ Switches

§ Digital-to-Analog Converters (DACs)

§ CPE Equipment

§ Bridges

§ Smart Jack

DESCRIPTION

The DS2174 enhanced bit error rate tester (EBERT) is a software-programmable test-pattern generator,

receiver, and analyzer capable of meeting the most stringent error-performance requir ements of digital

transmission facilities. It features bit-serial, nibble-parallel, and byte-parallel data interfaces, and

generates and uniquely synchronizes to pseudorandom patterns of the form 2

values from 1 to 32, and user-defined repetitive patterns of any length up to 512 octets.

7

8

9

10

11

12

13

14

15

16

17

39

38

37

36

35

34

33

32

31

30

29

D2

D1

D0

TDAT7

TDAT6

GND

TDAT5

TDAT4

TDAT3

TDAT2

GND

RDAT3

RDAT4

RDAT5

RDAT6

RDAT7

GND

A0

A1

A2

A3

CS

www.maxim-ic.com

DS2174

EBERT

DS2174