GENERAL DESCRIPTION
The MSA4709A is designed to provide BSH functions and to meet PABX transmission performance
requirements. This device provides two-wire to four-wire conversion function (Hybrid).

FEATURES
• B (Battery feed), S (Supervision), and H (Hybrid) functions integrated on chip.
• Design to meet Central Office and PABX quality transmission requirements.
• All transmission performance parameters can be externally programmable.
• Free from parasitic SCR's using dielectric isolation technology.
• Size and weight reduction over conventional approaches.
• Supply voltage selectable (VBB = –24 V/–48 V).
• 1 channel built-in relay driver.
• Package:
   30-pin plastic Shrink DIP (SDIP30-P-400-1.78) (Product name: MSA4709ASS)