Datasheet

DS3150
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1. DETAILED DESCRIPTION
The DS3150 performs all the functions necessary for interfacing at the physical layer to DS3, E3, and
STS-1 lines. The device has independent receive and transmit paths and a built-in jitter attenuator
(Figure 1-1). The receiver performs clock and data recovery from a B3ZS- or HDB3-coded alternate mark
inversion (AMI) signal and monitors for loss-of-signal. The receiver optionally performs B3ZS/HDB3
decoding and outputs the recovered data in either NRZ or bipolar format. The transmitter accepts data in
either NRZ or bipolar format, optionally performs B3ZS/HDB3 encoding, and drives standards-compliant
waveforms onto the outgoing 75! coaxial cable. The jitter attenuator can be mapped into the receiver
data path, mapped into the transmitter data path, or disabled. The DS3150 conforms to the
telecommunication standards listed in Table 1-A. Figure 1-2 shows the external components required for
proper operation.
Figure 1-1. Block Diagram
Analog
Loopback
Pre
Amp
Filter/
Equalizer
(Analog
Loss Of
Signal
Detect)
Clock &
Data
Recovery
Line
Driver
Wave-
Shaping
Clock
Invert
Clock
Invert
RX+
RX-
TX+
TX-
T
TS
PRBS
LBO
Z
CSE
ICE
TPOS/TNRZ
TCLK
TNEG
TESS
RNEG/RLCV
RCLK
RPOS/RNRZ
L
OS
MCLK
RMON
Remote
Loopback
EFE
V
DD
V
SS
Power
Connections
Test Functions
TDS0 TDS1
B3ZS/
HDB3
Encoder
AIS/
1010.../
PRBS
Generation
Mux
Mux
mux
PRBS
Detector
B3ZS/HDB3
Decoder
Digital Loss Of
Signal Detector
Squelch
Jitter Attenuator
(can be placed in either the receive path or the transmit path)
Driver
Monitor
Output Decode
Loopback Control
D
M
L
BKS
DS3150