DS21Q41B

Product :
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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 beconnected to either multiplexed or non-multiplexed buses
Each of the four framers contains dual two-frame elastic stores that can connect toasynchronous orsynchronous backplanes upto 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 ofmultiframes out of sync
Contains ANSI 1s density monitor andenforcer
CSU loop code generator and detector
Programmable output clocks for FractionalT1, ISDN-PRI, Actual Size and per channelloopback applications
Onboard FDL support circuitry
Pin-compatible with DS21Q43 Quad E1Framer
5V supply; low power CMOS
Available in 128-pin TQFP
Industrial (-40 to +85) grade versionavailable (DS21Q41BTN)


Specifications

Voltage on Any Pin Relative to Ground ................-1.0V to +7.0V
Operating Temperature................... 0 to 70 for DS21Q41BT
Operating Temperature ............. -40to +85for DS21Q41BTN
Storage Temperature  ..................................... -55°C to +125
Soldering Temperature  ..........................260°C for 10 seconds


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 availablein the single T1 device. The added features in the DS21Q41B are listed in Section 1. The DS21Q41Boffers a substantial space savings to applications that require more than one T1 framer on a card. TheQuad version is only slightly bigger than the single T1 device. All four framers in the DS21Q41B aretotally independent; they do not share a common framing synchronizer. Also, the transmit and receivesides of each framer are totally independent. The dual two-frame elastic stores contained in each of thefour framers can be independently enabled and disabled as required. The DS21Q41B meets all of thelatest specifications including ANSI T1.403 (and the emerging T1.403-199X), ANSI T1.231-1993,AT&T TR62411, AT&T TR54016, ITU G.704 and G.706.