DS3173N datasheet(2/232 Pages) DALLAS

2 / 232 page

DS3171/DS3172/DS3173/DS3174

2 of 230

FEATURES (CONTINUED)

Loopbacks Include Line, Diagnostic, Framer,

Payload, and Analog with Capabilities to Insert

AIS in the Directions Away from Loopback

Directions

Ports can be Disabled to Reduce Power

Integrated Clock Rate Adapter to Generate the

Remaining Internally Required 44.736MHz (DS3)

and 34.368MHz (E3) from a Single Clock

Reference Source at One of Three Standard

Frequencies (DS3, E3, STS-1)

Pin Compatible with the DS318x Family of

Devices and the DS316x Family of Devices

8-/16-Bit Generic Microprocessor Interface

Low-Power (~1.73W) 3.3V Operation (5V

Tolerant I/O)

Small High-Density Thermally Enhanced Chip-

Scale BGA Packaging (TE-CSBGA) with 1.27mm

Pin Pitch

Industrial Temperature Operation: -40°C to

+85°C

IEEE1149.1 JTAG Test Port

DETAILED DESCRIPTION

The DS3171 (single), DS3172 (dual), DS3173 (triple), and DS3174 (quad) perform framing, formatting, and line

transmission and reception. These devices contain integrated LIU(s), framer/formatter for M23 DS3, C-bit DS3,

G.751 E3, G.832 E3, or a combination of the above signal formats.

Each LIU has independent receive and transmit paths. The receiver LIU block performs clock and data recovery

from a B3ZS- or HDB3-coded AMI signal and monitors for loss of the incoming signal, or can be bypassed for

direct clock and data inputs. The receiver LIU block optionally performs B3ZS/HDB3 decoding. The transmitter LIU

drives standard pulse-shape waveforms onto 75

W coaxial cable or can be bypassed for direct clock and data

outputs. The jitter attenuator can be placed in either transmit or receive data path when the LIU is enabled. The

DS3/E3 framers transmit and receive serial data in properly formatted M23 DS3, C-bit DS3, G.751 E3, or G.832 E3

data streams. Unused functions can be powered down to reduce device power. The DS317x DS3/E3 SCTs

conform to the telecommunications standards listed in Section 4.

DS3173N Datasheet(PDF) 2 Page - Dallas Semiconductor