Rainbow Electronics DS21458 - Manual

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GENERAL DESCRIPTION
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.
APPLICATIONS
Routers
Channel Service Units (CSUs)
Data Service Units (DSUs)
Muxes
Switches
Channel Banks
T1/E1 Test Equipment
ORDERING INFORMATION
PART TEMP RANGE PIN-PACKAGE
DS21455 0°C to +70°C
256 BGA
(27mm x 27mm)
DS21455N -40°C to +85°C
256 BGA
(27mm x 27mm)
DS21458 0°C to +70°C
256 CSBGA
(17mm x 17mm)
DS21458N -40°C to +85°C
256 CSBGA
(17mm x 17mm)
FEATURES
Four Independent Transceivers, Each Having
the Following Features:
§ Complete T1 (DS1)/ISDN-PRI/J1
Transceiver Functionality
§ Complete E1 (CEPT) PCM-30/ISDN-
PRI Transceiver Functionality
§ Short- and Long-Haul Line Interface for
Clock/Data Recovery and Waveshaping
§ CMI Coder/Decoder
§ Crystal-Less Jitter Attenuator
§ Fully Independent Transmit and Receive
Functionality
§ Dual HDLC Controllers
§ On-Chip Programmable BERT Generator
and Detector
§ Internal Software-Selectable Receive-
and Transmit-Side Termination Resistors
for 75Ω/100Ω/120Ω T1 and E1
Interfaces
§ Dual Two-Frame Elastic-Store Slip
Buffers that can Connect to
Asynchronous Backplanes Up to
16.384MHz
§ 16.384MHz, 8.192MHz, 4.096MHz, or
2.048MHz Clock Output Synthesized to
Recovered Network Clock
§ Programmable Output Clocks for
Fractional T1, E1, H0, and H12
Applications
§ Interleaving PCM Bus Operation
§ 8-Bit Parallel Control Port, Multiplexed
or Nonmultiplexed, Intel or Motorola
§ IEEE 1149.1 JTAG-Boundary Scan
§ 3.3V Supply with 5V Tolerant Inputs and
Outputs
§ DS21455 Directly Replaces DS21Q55
§ Signaling System 7 (SS7) Support
§ RAI-CI, AIS-CI Support
DS21455/DS21458
Quad T1/E1/J1 Transceivers
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