DS21Q55N Maxim Integrated Products, DS21Q55N Datasheet - Page 9

• Manufacturer Part Number: DS21Q55N
• Description: Framer E1/J1/T1 3.3V 256-Pin BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55N

• Package: 256BGA
• Number Of Transceivers: 4
• Standard Framing Format: E1|J1|T1
• Maximum Supply Current: 75(Typ) mA
• Minimum Single Supply Voltage: 3.135 V
• Maximum Single Supply Voltage: 3.465 V

1. MAIN FEATURES
The DS21Q55 contains all the features of the previous generation of Dallas Semiconductor’s T1 and E1
transceivers plus many new features.
General
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Line Interface
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Programmable output clocks for fractional T1, E1,
H0, and H12 applications
Interleaving PCM bus operation
8-bit parallel control port, multiplexed or
nonmultiplexed, Intel or Motorola
IEEE 1149.1 JTAG-Boundary Scan
3.3V supply with 5V tolerant inputs and outputs
Pin compatible with DS21Qx5y family of products
Signaling System 7 Support
RAI-CI, AIS-CI support
27mm 1.27 pitch BGA package
3.3V supply with 5V tolerant inputs and outputs
Evaluation kits
IEEE 1149.1 JTAG boundary scan
Driver source code available from the factory
Requires only a 2.048MHz master clock for both
E1 and T1 operation with the option to use
1.544MHz for T1 operation
Fully software configurable
Short-haul and long-haul applications
Automatic receive sensitivity adjustments
Receive sensitivity ranges include 0 to 43dB or 0 to
12dB for E1 applications and 0 to 13dB or 0 to
36dB for T1 applications
Receive level indication in 2.5dB steps from
-42.5dB to -2.5dB
Internal receive termination option for 75Ω, 100Ω,
and 120Ω lines
Internal transmit termination option for 75Ω, 100Ω,
and 120Ω lines
Monitor application gain settings of 20dB, 26dB,
and 32dB
G.703 receive synchronization-signal mode
Flexible transmit waveform generation
T1 DSX-1 line build-outs
T1 CSU line build-outs of -7.5dB, -15dB, and
-22.5dB
E1 waveforms include G.703 waveshapes for
both 75Ω coax and 120Ω twisted cables
AIS generation independent of loopbacks
Alternating ones and zeros generation
Square-wave output
Open-drain output option
NRZ format option
Transmitter power-down
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Clock Synthesizer
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Jitter Attenuator
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Framer/Formatter
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Transmitter 50mA short-circuit limiter with
current-limit-exceeded indication
Transmit open-circuit-detected indication
Line interface function can be completely
decoupled from the framer/formatter
Output frequencies include 2.048MHz, 4.096MHz,
8.192MHz, and 16.384MHz
Derived from recovered receive clock
32-bit or 128-bit crystal-less jitter attenuator
Requires only a 2.048MHz master clock for both
E1 and T1 operation with the option to use
1.544MHz for T1 operation
Can be placed in either the receive or transmit path
or disabled
Limit trip indication
Fully independent transmit and receive
functionality
Full receive and transmit path transparency
T1 framing formats include D4 (SLC-96) and ESF
Detailed alarm and status reporting with optional
interrupt support
Large path and line error counters for:
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Timed or manual update modes
DS1 idle code generation on a per-channel basis in
both transmit and receive paths
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ANSI T1.403-1998 Support
RAI-CI detection and generation
AIS-CI detection and generation
E1ETS 300 011 RAI generation
G.965 V5.2 link detect
Ability to monitor one DS0 channel in both the
transmit and receive paths
In-band repeating pattern generators and detectors
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RCL, RLOS, RRA, and RAIS alarms interrupt on
change-of-state
Flexible signaling support
T1: BPV, CV, CRC6, and framing bit errors
alignment errors
User-defined
Digital milliwatt
Three independent generators and detectors
Patterns from 1 to 8 bits or 16 bits in length
E1: BPV, CV, CRC4, E-bit, and frame