Framer E1/J1/T1 3.3V 256-Pin TE-CSBGA

The DS26528 is a single-chip 8-port framer and line interface unit (LIU) combination for T1, E1, and J1 applications. Each channel is independently configurable, supporting both long-haul and short-haul lines.

• Eight Complete T1, E1, or J1 Long-Haul/Short-Haul Transceivers (LIU plus Framer)
• Independent T1, E1, or J1 Selections for Each Transceiver
• Internal Software-Selectable Transmit- and Receive-Side Termination for 100O T1 Twisted Pair, 110O J1 Twisted Pair, 120O E1 Twisted Pair, and 75O E1 Coaxial Applications
• Crystal-Less Jitter Attenuator can be Selected for Transmit or Receive Path; Jitter Attenuator Meets ETS CTR 12/13, ITU-T G.736, G.742, G.823, and AT&T Pub 62411
• External Master Clock can be Multiple of 2.048MHz or 1.544MHz for T1/J1 or E1 Operation; This Clock is Internally Adapted for T1 or E1 Usage in the Host Mode
• Receive-Signal Level Indication from -2.5dB to -36dB in T1 Mode and -2.5dB to -44dB in E1 Mode in Approximate 2.5dB Increments
• Transmit Open- and Short-Circuit Detection
• LIU LOS in Accordance with G.775, ETS 300 233, and T1.231
• Transmit Synchronizer
• Flexible Signaling Extraction and Insertion Using Either the System Interface or Microprocessor Port
• Alarm Detection and Insertion
• T1 Framing Formats of D4, SLC-96, and ESF
• J1 Support
• E1 G.704 and CRC-4 Multiframe
• T1-to-E1 Conversion