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062101

FEATURES

Line interface for T1 (1.544 MHz) and CEPT

(2.048 MHz) primary rate networks

Extracts clock and data from twisted pair or

coax

Meets requirements of PUB 43801, TR

62411, and applicable CCITT G.823

Precision on-chip PLL eliminates external

crystal or LC tank - no tuning required

Decodes AMI, B8ZS, and HDB3 coded

signals

Designed for short loop applications such as

terminal equipment to DSX-1

Reports alarm and error events

Compatible with the DS2180A T1/ISDN

Primary Rate and DS2181A CEPT

Transceivers, as well as DS2141A T1 and

DS2143 E1 Controllers

Companion to the DS2186 T1/CEPT

Transmit Line Interface and DS2188

T1/CEPT Jitter Attenuator

Single 5V supply; low-power CMOS

technology

PIN ASSIGNMENT

DESCRIPTION

The DS2187 T1/CEPT Receive Line Interface chip interfaces user equipment to North American (T1

1.544 MHz) and European (CEPT 2.048 MHz) primary rate communication networks. The device

extracts clock and data from twisted pair or coax transmission media and eliminates expensive discrete

components and/or manual tuning required in existing T1 and CEPT line termination electronics.

Application areas include DACS, CSU, CPE, channel banks, and PABX-to-computer interfaces such as

DMI and CPI.

DS2187

Receive Line Interface

www.dalsemi.com

AVDD

1

20

DVDD

RAIS

2

19

RCL

ZCSEN

3

18

AIS

NC

4

17

BPV

LCAP

5

16

NC

RCLKSEL

6

15

NC

RTIP

7

14

RPOS

RRING

8

13

RNEG

LOCK

9

12

RCLK

AVSS

10

11

DVSS

20-Pin SOIC (300-mil)

AVDD

1

18

DVDD

RAIS

2

17

RCL

ZCSEN

3

16

AIS

LCAP

4

15

BPV

RCLKSEL

5

14

NC

RTIP

6

13

RPOS

RRING

7

12

RNEG

LOCK

8

11

RCLK

AVSS

9

10

DVSS

18-Pin DIP (300-mil)