DS26334
3.3V, 16-Channel, E1/T1/J1 Short-
and Long-Haul Line Interface Unit
www.maxim-ic.com
GENERAL DESCRIPTION
FEATURES
Cꢀ16 E1, T1, or J1 Short/Long-Haul Line Interface
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
Units
CꢀIndependent E1, T1 or J1 Selections
support
E1/T1/J1
with
minimum
external
CꢀSoftware-Selectable Transmit and Receive-Side
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.
Impedance Matching
CꢀCrystal Less Jitter Attenuator
CꢀSelectable Single-Rail and Dual-Rail Mode and
AMI or HDB3/ B8ZS Line Encoding and
Decoding
CꢀDetection and Generation of AIS
CꢀDigital/Analog Loss of Signal Detection as per
T1.231, G.775 and ETSI 300233
CꢀExternal 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.
APPLICATIONS
T1 Digital Cross-Connects
ATM and Frame Relay Equipment
Wireless Base Stations
CꢀReceiver Signal Level Indicator from -2.5dB to
-38dB in T1 Mode and –3dB to –43dB in E1
Mode in 2.5dB Increments
ISDN Primary Rate Interface
E1/T1/J1 Multiplexer and Channel Banks
E1/T1/J1 LAN/WAN Routers
CꢀTwo Built-In BERT Testers for Diagnostics
Cꢀ8-Bit Parallel Interface Support for Intel or
Motorola Mode or a 4-Wire Serial Interface
FUNCTIONAL DIAGRAM
CꢀTransmit Short Circuit Protection
CꢀG.772 Nonintrusive Monitoring
JTAG
CꢀReceive Monitor Mode Handles Combinations of
14dB to 30dB of Resistive Attenuation Along with
12dB to 30dB of Cable Attenuation
MODE
SOFTWARE CONTROL
AND JTAG
CꢀSpecification 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
CꢀSingle 3.3V Supply with 5V Tolerant I/O
CꢀJTAG Boundary Scan as per IEEE 1149.1
LOSS
RTIP
RPOS
RNEG
RCLK
RECEIVER
RRING
TPOS
TTIP
TNEG
TRANSMITTER
TCLK
TRING
1
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS26334G
0°C to +70°C 256 TEBGA
16
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