DS21Q41B

DS21Q41B Quad T1 Framer www.dalsemi.com FEATURES § § § § § Four T1 DS1/ISDN-PRI framing transceivers All four framers are fully independent Frames to D4, ESF, and SLC-96 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 Extracts and inserts robbed bit signaling Framer and payload loopbacks Large counters for BPVs, LCVs, EXZs, CRC6, PCVs, F-bit errors and the number of multiframes out of sync Contains ANSI 1s density monitor and enforcer CSU loop code generator and detector Programmable output clocks for Fractional T1, ISDN-PRI, Actual Size and per channel loopback applications Onboard FDL support circuitry Pin-compatible with DS21Q43 Quad E1 Framer 5V supply; low power CMOS Available in 128-pin TQFP Industrial (-40°C to +85°C) grade version available (DS21Q41BTN) FUNCTIONAL DIAGRAM RECEIVE FRAMER ELASTIC STORE TRANSMIT FORMATTER ELASTIC STORE § § § § § § § § § § § FRAMER #0 FRAMER #1 FRAMER #2 FRAMER #3 CONTROL PORT ACTUAL SIZE QUAD T1 FRAMER DESCRIPTION The DS21Q41B combines four of the popular DS2141A T1 Controllers onto a single monolithic die. The “B” designation denotes that some new features are available in the Quad version that were not available in the single T1 device. The added features in the DS21Q41B are listed in Section 1. The DS21Q41B offers a substantial space ...