DS26303 Datasheet, PDF (1/97 Pages) Maxim Integrated Products – 3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit

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DS26303
3.3V, E1/T1/J1, Short-Haul,
Octal Line Interface Unit
GENERAL DESCRIPTION
The DS26303 is an 8-channel short-haul line
interface unit (LIU) that supports E1/T1/J1 from a
single 3.3V power supply. A wide variety of
applications are supported through internal
termination or external termination. A single bill of
material can support E1/T1/J1 with minimum external
components. Redundancy is supported through
nonintrusive monitoring, optimal high-impedance
modes, and configurable 1:1 or 1+1 backup
enhancements. An on-chip synthesizer generates the
E1/T1/J1 clock rates by a single master clock input of
various frequencies. Two clock output references are
also offered.
APPLICATIONS
T1 Digital Cross-Connects
ATM and Frame Relay Equipment
Wireless Base Stations
ISDN Primary Rate Interface
E1/T1/J1 Multiplexer and Channel Banks
E1/T1/J1 LAN/WAN Routers
FUNCTIONAL DIAGRAM
Jtag
RTIP
RRING
TTTIP
TRING
Software Control,
Hardware Control
and JTAG
MODESEL
RLOS
Receiver
Transmitter
1
RPOS
RNEG
RCLK
TPOS
TNEG
TCLK
8
FEATURES
§ 8 Complete E1, T1, or J1 Short Haul Line
Interface Units
§ Independent E1, T1, or J1 Selections
§ Internal Software-Selectable Transmit and
Receive-Side Termination
§ Crystal-Less Jitter Attenuator
§ Selectable Single-Rail and Dual-Rail Mode and
AMI or HDB3/ B8ZS Line Encoding and
Decoding
§ Detection and Generation of AIS
§ Digital/Analog Loss-of-Signal Detection as per
T1.231, G.775, and ETSI 300233
§ External Master Clock can be Multiple of
2.048MHz or 1.544MHz for T1/J1 or E1
Operation; This Clock will be Internally Adapted
for T1 or E1 Use
§ Built-In BERT Tester for Diagnostics
§ 8-Bit Parallel Interface Support for Intel or
Motorola Mode or a 4-Wire Serial Interface
§ Hardware Mode Interface Support
§ Transmit Short-Circuit Protection
§ G.772 Nonintrusive Monitoring
§ Specification Compliance to the Latest T1 and
E1 Standards—ANSI T1.102, AT&T Pub 62411,
T1.231, T1.403, ITU G.703, G.742, G.775,
G.823, ETSI 300 166, and ETSI 300 233
§ Single 3.3V Supply with 5V Tolerant I/O
§ JTAG Boundary Scan as per IEEE 1149.1
§ 160-Pin PBGA/144-Pin eLQFP Package
ORDERING INFORMATION
PART
DS26303G-XXX*
TEMP RANGE PIN-PACKAGE
0°C to +70°C 160 PBGA
DS26303GN-XXX* -40°C to +85°C 160 PBGA
DS26303L-XXX
0°C to +70°C 144 eLQFP
DS26303
DS26303L-XXX+
DS26303LN-XXX
0°C to +70°C 144 eLQFP
-40°C to +85°C 144 eLQFP
DS26303LN-XXX+ -40°C to +85°C 144 eLQFP
Note: When XXX is 075, the part defaults to 75W impedance in E1
mode; when XXX is 120, the part defaults to 120W impedance.
+ Denotes a lead-free/ROHS-compliant device.
* Future product—contact factory for availability.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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