T1/E1 LOW-POWER LINE INTERFACE UNIT

The CS61577 is a drop-in replacement for the CS61574, and combines the complete analog transmit and receive line interface for T1 or E1 applications in a low power, 28-pin device operating from a +5V supply. The CS61577 supports processor-based or standalone operation and interfaces with industry standard T1 and E1 framers.The receiver uses a digital Delay-Locked-Loop which is continuously calibrated from a crystal reference to provide excellent stability and jitter tolerance. The receiverincludes a jitter attenuator optimized for minimum delay in switching and transmission applications. The transmitter provides internal pulse shaping to insure compliance with T1 and E1 pulse template specifications.

• Provides Analog Transmission Line Interface for T1 and E1 Applications
• Drop-in Replacement for CS61574 with the Following Enhancements:
  • Lower Power Consumption
  • Transmitter Short-Circuit Current Limiting
  • Greater Transmitter Immunity to Line Reflections
  • Software Selection Between 75O and 120O E1 Output Options
  • Internally Controlled E1 Pulse Width
  • B8ZS/HDB3/AMI Encoder/Decoder