DS21Q58

· Four Complete E1 (CEPT) PCM-30/ISDN-PRI Transceivers
· Pin Compatible with the DS21Q50 and DS21Q59
· Short-Haul Line Interfaces
· 32-Bit or 128-Bit Crystal-Less Jitter Attenuator
· Frames to FAS, CAS, and CRC4 Formats
· CAS/CCS Signaling Support
· 4MHz/8MHz/16MHz Clock Synthesizer
· Flexible System Clock with Automatic Source Switching on Loss-of-Clock Source
· Two-Frame Elastic-Store Slip Buffer on the Receive Side
· Interleaving PCM Bus Operation Up to 16.384MHz
· Configurable Parallel and Serial Port Operation
· Detects and Generates Remote and AIS Alarms
· Fully Independent Transmit and Receive Functionality
· Four Separate Loopback Functions
· PRBS Generation/Detection/Error Counting
· 3.3V Low-Power CMOS
· Large Counters for Bipolar and Code Violations, CRC4 Codeword Errors, FAS Word Errors, and E Bits
· Eight Additional User-Configurable Output Pins
· 100-Pin (14mm x 14mm) LQFP Package

· DSLAMs
· Routers
· IMA and WAN Equipment

Voltage Range on Any Pin Relative to Ground ...............................-1.0V to +6.0V
Operating Temperature Range for DS21Q58L ..................................0 to +70
Operating Temperature Range for DS21Q58LN ............................-40 to +85
Storage Temperature Range ......................................................-55 to +125
Soldering Temperature Range ..............See IPC/JEDEC J-STD-020A Specification

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.

The DS21Q58 E1 quad transceiver contains all the necessary functions for connecting to four E1 lines.

The DS21Q58 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.