DS21455 Maxim Integrated Products, DS21455 Datasheet
DS21455
Manufacturer Part Number
DS21455
Description
Network Controller & Processor ICs Quad E1-T1-J1 Single -Chip Transceiver (S
Manufacturer
Maxim Integrated Products
Specifications of DS21455
Product
Framer
Number Of Transceivers
4
Data Rate
64 Kbps
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
328 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Package / Case
BGA
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS21455
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
DS21455+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Company:
Part Number:
DS21455N+
Manufacturer:
Maxim Integrated Products
Quantity:
135
DALLAS is a registered trademark of Dallas Semiconductor Corp.
MAXIM is a registered trademark of Maxim Integrated Products, Inc.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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
www.maxim-ic.com
DS21455
DS21455N
DS21458
DS21458N
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
256 BGA
(27mm x 27mm)
256 BGA
(27mm x 27mm)
256 CSBGA
(17mm x 17mm)
256 CSBGA
(17mm x 17mm)
1 of 270
Quad T1/E1/J1 Transceivers
FEATURES
Four Independent Transceivers, Each Having
the Following Features:
§ Complete T1 (DS1)/ISDN-PRI/J1
§ Complete E1 (CEPT) PCM-30/ISDN-
§ Short- and Long-Haul Line Interface for
§ CMI Coder/Decoder
§ Crystal-Less Jitter Attenuator
§ Fully Independent Transmit and Receive
§ Dual HDLC Controllers
§ On-Chip Programmable BERT Generator
§ Internal Software-Selectable Receive-
§ Dual Two-Frame Elastic-Store Slip
§ 16.384MHz, 8.192MHz, 4.096MHz, or
§ Programmable Output Clocks for
§ Interleaving PCM Bus Operation
§ 8-Bit Parallel Control Port, Multiplexed
§ IEEE 1149.1 JTAG-Boundary Scan
§ 3.3V Supply with 5V Tolerant Inputs and
§ DS21455 Directly Replaces DS21Q55
§ Signaling System 7 (SS7) Support
§ RAI-CI, AIS-CI Support
Transceiver Functionality
PRI Transceiver Functionality
Clock/Data Recovery and Waveshaping
Functionality
and Detector
and Transmit-Side Termination Resistors
for 75Ω/100Ω/120Ω T1 and E1
Interfaces
Buffers that can Connect to
Asynchronous Backplanes Up to
16.384MHz
2.048MHz Clock Output Synthesized to
Recovered Network Clock
Fractional T1, E1, H0, and H12
Applications
or Nonmultiplexed, Intel or Motorola
Outputs
DS21455/DS21458
REV: 040804
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