DS2186

Transmit Line Interface

DS2186

022798 1/11

FEATURES

MHz) primary rate networks

eliminate external components

and long–loop applications

modes

Transceivers DS2141A T1 and DS2143 E1 Control-

lers

and DS2188 T1/CEPT Jitter Attenuator

PIN ASSIGNMENT

LF

LF

20–PIN DIP (300 MIL)

TAIS

ZCSEN

TCLKSEL

LEN0

LEN1

LEN2

TTIP

TRING

LCLK

LPOS

LNEG

TCLK

TPOS

TNEG

LB

MTIP

MRING

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

ZCSEN

20–PIN SOIC (300 Mil)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

LCLK

LPOS

LNEG

TCLK

TPOS

TNEG

LB

MTIP

MRING

TAIS

TCLKSEL

LEN0

LEN1

LEN2

VDD

TTIP

TRING

VSS

DESCRIPTION

The DS2186 T1/CEPT Transmit Line Interface Chip in-

terfaces user equipment to North American (T1–1.544

MHz) and European (CEPT–2.048 MHz) primary rate

communications networks. The device is compatible

with all types of twisted pair and coax cable found in

such networks.

Key on–chip components include: programmable wave

shaping circuitry, line drivers, remote loopback, and

zero suppression logic. A line–coupling transformer is

the only external component required.

Short loop (DSX–1, 0 to 655 feet) and long loop (CSU; 0

dB, –7.5 dB and –15 dB) pulse templates found in T1

applications are supported. Appropriate CCITT recom-

mendations are met in the CEPT mode.

Application areas include DACS, CSU, CPE, channel

banks, and PABX–to–computer interfaces such as DMI

and CPI. The DS2186 supports ISDN–PRI (Primary

Rate Interface) specifications.