YTD428 データシートの表示（PDF） - Yamaha Corporation

部品番号

コンポーネント説明

メーカー

YTD428

IDSU ISDN DSU for Terminal Equipment

Yamaha Corporation 

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INTRODUCTION

1. INTRODUCTION

YTD428 is a LSI which provides the ISDN subscriber interface (two-wire time compression

multiplexing operation) and the NT side of the ISDN Basic Rate user-network interface function

(digital four-wire time-division full-duplex operation). It is capable of providing the electric

characteristics conforming to TTC Standard JT-I430 and JT-G961.

YTD428 incorporates the circuit termination and line termination functions on a single chip

allowing the user to easily configure a DSU (Digital Service Unit) that consumes small amount of

power at a minimal cost.

In addition, a TTL interface is provided at the T reference point (layer 1 level). This feature is

especially effective when combined with YAMAHA's ISDN LSI for S/T reference point interface,

YTD423 or YTD418. It allows considerable cost reduction on parts around the pulse transformer

when constructing a device with a built-in DSU.

The driver/receiver section of the T reference point interface can be separated from the DSU section

and be used independently. The user can enable or disable this feature as necessary.

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