TXC04228

T1Mx28 Device DS1 Mapper 28-Channel TXC-04228 DATA SHEET FEATURES Twenty-eight independent 1.544 Mbit/s DS1 mappers Single/dual byte-parallel Telecom Bus @ 6.48 MHz (28 slots) or 19.44 MHz (84 slots) Floating VT1.5 byte-synchronous mapping with signaling only for use with or without a slip buffer Asynchronous mapping for DS1 SONET mapping (VT1.5) or SDH mapping (VC-4/AU-3/TU-11) AMI or B8ZS codec for DS1s, or NRZ Serial I/O for control of DS1 line interface transceivers or framers Telecom Bus and DS1 loopbacks with integral PRBS generator and analyzer VT1.5/TU-11 pointer tracking and generation VT1.5/TU-11 overhead processing and insertion One-second latched performance registers and counters DS1 alarm detection and generation Internal ring port for use as a dual bus 14-channel mapper Gapped line clock option for Internet applications without need for a framer Intel/Motorola-compatible microprocessor interface 3-bit RDI support Boundary scan capability (IEEE 1149.1) Single +3.3 V, ±5 % power supply 456-lead plastic ball grid array package (35 x 35 mm) DESCRIPTION The T1Mx28 is a 28-channel byte-synchronous and asynchronous DS1 mapper. Four field-proven DS1MX7 DS1 Mapper chips are interconnected in a single compact package to permit higher application board densities. Both SONET and SDH mappings are provided per Bellcore GR253-CORE (VT1.5) and ITU G.707 3-96. A single-dual add/ drop Telecom Bus is provided that can operate at either 6.48...