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YTD436 Datasheet, PDF (1/14 Pages) YAMAHA CORPORATION – ISTC ISDN BRI controller with S/T ref. pt. analog D/R
YTD436
ISTC
ISDN BRI controller with S/T ref. pt. analog D/R
YTD436 is a high-performance communication LSI for the ISDN BRI user-network
interface function (digital four-wire time-division full-duplex operation), supporting D
channel layer 1 and layer 2 functions in one 100-pin SQFP chip.
YTD436 supports layer 1 (physical layer) control function conforming to ITU-T
Recommendation I.430 and fully supports layer 2 (LAPD protocol) function conforming to
ITU-T Recommendations Q.920 and Q.921. ETSI (European Telecommunication Standards
Institute) and North American standard operating modes are also supported.
In addition, YTD436 includes layer 3 processor interface function which operate in DMA
transfer mode or I/O transfer mode. This gives a great advantage for mounting and
functional designing of both “active” (CPU on board) terminal equipment and “passive” (no
CPU on board) PC cards.
The layer 1 function has a built-in S/T reference point analog driver/receiver to support the
S/T reference point interface. In order to support the U interface, YTD436 also has a I.430
TTL interface (no built-in analog driver/receiver) suitable for connecting to an NT1 chip or
a DSU module.
YTD436 CATALOG
CATALOG No.:4TD436A41
2005.1