MH89770

® MH89770 T1/ESF Framer & Interface Preliminary Information Features Complete interface to a bidirectional T1 link D3/D4 or ESF framing and SLC-96 compatible Two frame elastic buffer with jitter tolerance improved to 156UI Insertion and detection of A, B, C, D bits Signalling freeze, optional debounce Selectable B8ZS, jammed bit (ZCS) or no zero code suppression Yellow and blue alarm signal capabilities Bipolar violation count, FT error count, CRC error count Frame and superframe sync. signals, Tx and Rx Per channel, overall, and remote loop around 8 kHz synchronization output Digital phase detector between T1 line and ST-BUS ST-BUS compatible Pin compatible with the MH89760BN/BS Inductorless clock recovery Loss of Signal (LOS) indication Available in standard, narrow and surface mount formats MH89770N MH89770S ISSUE 2 March 1995 Ordering Information 40 Pin DIL Hybrid 0.8" row pitch 40 Pin Surface Mount Hybrid 0° C to 70° C Applications DS1/ESF digital trunk interfaces Computer to PBX interfaces (DMI and CPI) High speed computer to computer data links Description The MH89770 is a complete T1 interface solution, meeting the Extended Super Frame (ESF), D3/D4 and SLC-96 formats. The MH89770 interfaces to the DS1 1.544 Mbit/sec digital trunk and has the capability of meeting ACCUNET®1 T1.5 wander tolerance (138 UI). The MH89770 is a pin-compatible enhancement of the MH89760B. 1. ACCUNET ® T1.5 is a registered trademark of AT & T. Tx...