DS21Q43A - Dallas Semiconducotr

DS21Q43A Quad E1 Framer

The DS21Q43A combines four of the popular DS2143 E1 Controllers onto a single monolithic die. The “A” designation denotes that some new features are available in the Quad version which were not available in the single E1 device. The added features in the DS21Q43A are listed in Section 1. The DS21Q43A offers a substantial space savings to applications that re.

Features

§ § § § § Four E1 (CEPT or PCM-30) /ISDN-PRI framing transceivers All four framers are fully independent; transmit and receive sections of each framer are fully independent Frames to FAS, CAS, CCS, and CRC4 formats 8-bit parallel control port that can be connected to either multiplexed or nonmultiplexed buses Each of the four framers contains dual twoframe elastic stores that can connect to asynchronous or synchronous backplanes up to 8.192 MHz Easy access to Si and Sa bits Extracts and inserts CAS signaling Large counters for bipolar and code violations, CRC4 code word errors, FAS word errors.