DS26334 Datasheet, PDF (1/115 Pages) Dallas Semiconductor – 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit

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DS26334
3.3V, 16-Channel, E1/T1/J1 Short-
and Long-Haul Line Interface Unit
GENERAL DESCRIPTION
The DS26334 is a 16-channel short/long-haul line
interface unit (LIU) that supports E1/T1/J1 from a
single 3.3V power supply. 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. The device is offered in a 256-pin
TEBGA, the smallest package available for a 16-
channel LIU.
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
SOFTWARE CONTROL
AND JTAG
MODE
LOSS
RTIP
RRING
TTIP
TRING
RECEIVER
TRANSMITTER
1
RPOS
RNEG
RCLK
TPOS
TNEG
TCLK
16
FEATURES
§ 16 E1, T1, or J1 Short/Long-Haul Line Interface
Units
§ Independent E1, T1 or J1 Selections
§ Software-Selectable Transmit and Receive-Side
Impedance Matching
§ 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 Usage.
§ Receiver Signal Level Indicator from -2.5dB to
-38dB in T1 Mode and –3dB to –43dB in E1
Mode in 2.5dB Increments
§ Two Built-In BERT Testers for Diagnostics
§ 8-Bit Parallel Interface Support for Intel or
Motorola Mode or a 4-Wire Serial Interface
§ Transmit Short Circuit Protection
§ G.772 Nonintrusive Monitoring
§ Receive Monitor Mode Handles Combinations of
14dB to 30dB of Resistive Attenuation Along with
12dB to 30dB of Cable Attenuation
§ 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
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS26334G 0°C to +70°C 256 TEBGA
DS26334GN -40°C to +85°C 256 TEBGA
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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REV: 070105