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DS21Q41BTN Datasheet

  • DS21Q41BTN

  • Quad T1 Framer

  • 713.28KB

  • 61頁

  • DALLAS   DALLAS

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DS21Q41B
Quad T1 Framer
www.dalsemi.com
FEATURES
摟
摟
摟
摟
摟
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 non-
multiplexed buses
Each of the four framers contains dual two-
frame 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擄C to +85擄C) grade version
available (DS21Q41BTN)
FUNCTIONAL DIAGRAM
RECEIVE
FRAMER
ELASTIC
STORE
TRANSMIT
FORMATTER
ELASTIC
STORE
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
摟
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
鈥淏鈥?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 savings to applications that require more than one T1 framer on a card. The
Quad version is only slightly bigger than the single T1 device. All four framers in the DS21Q41B are
totally independent; they do not share a common framing synchronizer. Also, the transmit and receive
sides of each framer are totally independent. The dual two-frame elastic stores contained in each of the
four framers can be independently enabled and disabled as required. The DS21Q41B meets all of the
latest 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.
1 of 61
092299

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