DS21Q59
www.maxim-ic.com
GENERAL DESCRIPTION
FEATURES
Cꢀ Four Complete E1 (CEPT) PCM-30/ISDN-PRI
Transceivers
The DS21Q59 E1 quad transceiver contains all the
necessary functions for connecting to four E1 lines.
The DS21Q59 is a direct replacement for the
DS21Q50, with the addition of signaling access and
improved interrupt handling. It is composed of a line
interface unit (LIU), framer, and a TDM backplane
interface, and is controlled through an 8-bit parallel
port configured for Intel or Motorola bus operations or
serial port operation.
Cꢀ Pin Compatible with the DS21Q50
Cꢀ Long-Haul and Short-Haul Line Interfaces
Cꢀ 32-Bit or 128-Bit Crystal-Less Jitter Attenuator
Cꢀ Frames to FAS, CAS, and CRC4 Formats
Cꢀ CAS/CCS Signaling Support
Cꢀ 4MHz/8MHz/16MHz Clock Synthesizer
Cꢀ Flexible System Clock with Automatic Source
Switching on Loss-of-Clock Source
Cꢀ Two-Frame Elastic-Store Slip Buffer on the
Receive Side
Cꢀ Interleaving PCM Bus Operation Up to
16.384MHz
Cꢀ Configurable Parallel and Serial Port Operation
Cꢀ Detects and Generates Remote and AIS Alarms
Cꢀ Fully Independent Transmit and Receive
Functionality
Cꢀ Four Separate Loopback Functions
Cꢀ PRBS Generation/Detection/Error Counting
Cꢀ 3.3V Low-Power CMOS
APPLICATIONS
DSLAMs
Routers
IMA and WAN Equipment
PIN CONFIGURATION
TOP VIEW
Cꢀ Large Counters for Bipolar and Code Violations,
CRC4 Codeword Errors, FAS Word Errors, and
E Bits
Cꢀ Eight Additional User-Configurable Output Pins
Cꢀ100-Pin (14mm) LQFP Package
Dallas
Semiconductor
DS21Q59
100
1
LQFP
ORDERING INFORMATION
PART
TEMP RANGE
PIN-PACKAGE
DS21Q59L
DS21Q59LN
0°C to +70°C
-40°C to +85°C
100 LQFP
100 LQFP
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.
1 of 76
REV: 090104