DS31256 datasheet(179/183 Pages) MAXIM

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DS31256 256-Channel, High-Throughput HDLC Controller

179 of 183

17.

APPLICATIONS

This section describes some possible applications for the DS31256. There are numerous potential

configurations but only a few are shown. Users are encouraged to contact the factory for support of their

particular

application.

telecom.support@dalsemi.com

visit

our

website

www.maxim-ic.com/telecom for more information.

The T1 and E1 channelized application examples in this section are one of two types. The first type is

where a single T1 or E1 data stream is routed to and from the DS31256. This is represented as a thin

arrow in the application examples (Figure 17-1). Figure 17-2 shows the electrical connections. The

second type is where four T1 or E1 data streams have been TDM into a single 8.192MHz data stream,

which is routed to and from the DS31256. This type is represented as a thick arrow in Figure 17-1.

Figure 17-3 shows the electrical connections.

Figure 17-1. Application Drawing Key

Figure 17-2. Single T1/E1 Line Connection

SINGLE T1 OR E1 LINE AT 1.544MHz OR 2.048MHz

QUAD (4) T1 OR 31 LINES BYTE INTERLEAVED AT 8.192MHz

RCLK

RSER

RSYNC

TCLK

TSER

TSYNC

DS31256

DALLAS FRAMER

OR TRANSCEIVER

(ELASTIC STORES

DISABLED)

Note: A looped timed application is shown. The transmit clock may be decoupled from the receive in timing master applications.

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