DS3151 datasheet(5/61 Pages) MAXIM

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DS3151/DS3152/DS3153/DS3154 Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs

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FEATURES (continued)

Receiver

AGC/equalizer block handles from 0 to 15dB of cable loss

Loss-of-lock (LOL) PLL status indication

Interfaces directly to a DSX monitor signal (~20dB flat loss) using built-in preamp

Digital and analog loss-of-signal (LOS) detectors (ANSI T1.231 and ITU G.775)

Optional B3ZS/HDB3 decoder

Line-code violation output pin and counter

Binary or bipolar framer interface

On-board 2

15 - 1 and 223 - 1 PRBS detector

Clock inversion for glueless interfacing

Tri-state clock and data outputs support protection switching applications

Per-channel power-down control

Transmitter

Binary or bipolar framer interface

Gapped clock capable up to 51.84MHz

Wide 50

±20% transmit clock duty cycle

Clock inversion for glueless interfacing

Optional B3ZS/HDB3 encoder

On-board 2

15 - 1 and 223 - 1 PRBS generator

Complete DS3 AIS generator (ANSI T1.107)

Unframed all-ones generator (E3 AIS)

Line build-out (LBO) control

Tri-state line driver outputs support protection switching applications

Per-channel power-down control

Output driver monitor

1. DETAILED DESCRIPTION

The DS3151 (single), DS3152 (dual), DS3153 (triple), and DS3154 (quad) LIUs perform the functions necessary

for interfacing at the physical layer to DS3, E3, or STS-1 lines. Each LIU has independent receive and transmit

paths and a built-in jitter attenuator. The receiver performs clock and data recovery from a B3ZS- or HDB3-coded

alternate mark inversion (AMI) signal and monitors for loss of the incoming signal. The receiver optionally performs

B3ZS/HDB3 decoding and outputs the recovered data in either binary or bipolar format. The transmitter accepts

data in either binary or bipolar format, optionally performs B3ZS/HDB3 encoding, and drives standard pulse-shape

waveforms onto 75

Ω coaxial cable. The jitter attenuator can be mapped into the receiver data path, mapped into

the transmitter data path, or be disabled. The DS315x LIUs conform to the telecommunications standards listed in

Table 1-A. Figure 1-1 shows the external components required for proper operation.

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