Mapper T1/E1/J1/T3/E3 SONET/SDH 10Mbps/100Mbps 1.8V/3.3V 256-Pin CSBGA

The DS33Z44 extends four 10/100 Ethernet LAN segments by encapsulating MAC frames in HDLC or X.86 (LAPS) for transmission over four PDH/TDM data streams. The serial links support bidirectional synchronous interconnect up to 52Mbps over xDSL, T1/E1/J1, T3/E3, V.35/Optical, OC-1/EC-1, or SONET/SDH Tributary. The device performs store-and-forward of packets with full wire-speed transport capability. The built-in Committed Information Rate (CIR) controllers provide fractional bandwidth allocation up to the line rate in increments of 512kbps. The DS33Z44 can operate with an inexpensive external processor, EEPROM or in a stand-alone hardware mode.

• Four 10/100 IEEE 802.3 Ethernet MACs (MII and RMII) Half/Full-Duplex with Automatic Flow Control
• Four 52Mbps Synchronous TDM Serial Ports with Independent Transmit and Receive Timing
• HDLC/LAPS Encapsulation with Programmable FCS and Interframe Fill
• Committed Information Rate Controllers Provide Fractional Allocations in 512kbps Increments
• Programmable BERT for Serial (TDM) Interfaces
• External 16MB, 100MHz SDRAM Buffering
• Parallel Microprocessor Interface
• SPI Interface and Hardware Mode for Operation Without a Host Processor
• 1.8V Operation with 3.3V Tolerant I/O
• IEEE 1149.1 JTAG Support