DS21348

Manufacturer Part NumberDS21348
Description3.3V E1/T1/J1 Line Interface
ManufacturerDallas Semiconducotr
DS21348 datasheet
 


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FEATURES
§ Complete E1, T1, or J1 line interface unit
(LIU)
§ Supports both long-haul and short-haul
trunks
§ Internal software-selectable receive-side
termination for 75Ω/100Ω/120W
§ 3.3V power supply
§ 32-bit or 128-bit crystal-less jitter attenuator
requires only a 2.048MHz master clock for
both E1 and T1 with option to use 1.544MHz
for T1
§ Generates the appropriate line build-outs,
with and without return loss, for E1 and
DSX-1 and CSU line build-outs for T1
§ AMI, HDB3, and B8ZS, encoding/decoding
§ 16.384MHz, 8.192MHz, 4.096MHz, or
2.048MHz clock output synthesized to
recovered clock
§ Programmable monitor mode for receiver
§ Loopbacks and PRBS pattern generation/
detection with output for received errors
§ Generates/detects in-band loop codes, 1 to 16
bits including CSU loop codes
§ 8-bit parallel or serial interface with optional
hardware mode
§ Muxed and nonmuxed parallel bus supports
Intel or Motorola
§ Detects/generates blue (AIS) alarms
§ NRZ/bipolar interface for TX/RX data I/O
§ Transmit open-circuit detection
§ Receive Carrier Loss (RCL) indication
(G.775)
§ High-Z State for TTIP and TRING
§ 50mA (rms) current limiter
DS21348/Q348
3.3V E1/T1/J1 Line Interface
PIN DESCRIPTION
44
1
44 TQFP
7 mm
CABGA
ORDERING INFORMATION
DS21348TN 44-Pin TQFP
DS21348T
44-Pin TQFP
DS21348GN 7mm CABGA (-40°C to +85°C)
DS21348G
7mm CABGA
DS21Q348N (Quad) BGA
DS21Q348
(Quad) BGA
1 of 73
(-40°C to +85°C)
o
o
(0
C to +70
C)
o
o
(0
C to +70
C)
(-40°C to +85°C)
o
o
(0
C to +70
C)
111501