HC-5560

Features:

• Single 5V Supply . . . . . . . . . . . . . . . . . . . . . . .10mA (Typ)
• Mode Selectable Coding Including:
      - AMI (T1, T1C)
      - B8ZS (T1)
      - HDB3 (PCM30)
• North American and European Compatibility
• Simultaneous Encoding and Decoding
• Asynchronous Operation
• Loop Back Control
• Transmission Error Detection
• Alarm Indication Signal
• Replaces MJ1440, MJ1471 and TCM2201 Transcoders


Application

• North American and European PCM Transmission Lines where Pseudo Ternary Line Code Substitution Schemes are Desired
• Any Equipment that Interfaces T1, T1C, T2 or PCM30 Lines Including Multiplexers, Channel Service Units, (CSUs) Echo Cancellors, Digital Cross-Connects (DSXs), T1 Compressors, etc.
• Related Literature
    - AN573, The HC-5560 Digital Line Transcoder


Pinout




Specifications

Voltage at Any Pin . . . . . . . . . . . . . . . . . . . .GND -0.3V to VDD 0.3V
Maximum VDD Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V


Description

The HC-5560 digital line transcoder provides encoding and decoding of pseudo ternary line code substitution schemes. Unlike other industry standard transcoders, it provides four worldwide compatible mode selectable code substitution schemes, including HDB3 (High Density Bipolar 3), B6ZS, B8ZS (Bipolar with 6 or 8 Zero Substitution) and AMI (Alternate Mark Inversion).

The HC-5560 is fabricated in CMOS and operates from a single 5V supply. All inputs and outputs are TTL compatible. Application Note #573, "The HC-5560 Digital Line Transcoder," by D.J. Donovan is available.