The DS21455 and DS21458 are quad monolithic
devices featuring independent transceivers that can
be software configured for T1, E1, or J1 operation.
Each is composed of a line interface unit (LIU),
framer, HDLC controllers, and a TDM backplane
interface, and is controlled via an 8-bit parallel port
configured for Intel or Motorola bus operations. The
DS21455* is a direct replacement for the older
DS21Q55 quad MCM device. The DS21458, in a
smaller package (17mm CSBGA) and featuring an
improved controller interface, is software compatible
with the older DS21Q55.
*The JTAG function on the DS21455/DS21458 is a single
controller for all four transceivers, unlike the DS21Q55, which has
a JTAG controller-per-transceiver architecture.
Key Features
Applications/Uses
Four Independent Transceivers, Each Having the Following Features:
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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