DS21455 Maxim Integrated Products, DS21455 Datasheet - Page 11

• Manufacturer Part Number: DS21455
• Description: Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
• Manufacturer: Maxim Integrated Products

Specifications of DS21455

• Product: Framer
• Number Of Transceivers: 4
• Data Rate: 64 Kbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 328 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: BGA

2. FEATURE HIGHLIGHTS
2.1 General
2.2 Line Interface
2.3 Clock Synthesizer
DS21455: 27mm, 1.27 pitch BGA, compatible replacement for the DS21Q55
DS21458: 17mm, 1.00 pitch CSBGA
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 a single master clock (MCLK) for both E1 and T1 operation. Master clock can be
2.048MHz, 4.096MHz, 8.192MHz, or 16.384MHz. Option to use 1.544MHz, 3.088MHz,
6.276MHz, or 12.552MHz for T1-only operation
Fully software configurable
Short- and long-haul applications
Automatic receive sensitivity adjustments
Ranges include 0dB to -43dB or 0dB to -12dB for E1 applications; 0dB to -36dB or 0dB to -15dB
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
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
Transmitter 50mA short-circuit limiter with exceeded indication of current limit
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 line clock or master clock
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