The DS26521 is a single-channel 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.
Complete T1, E1, or J1 Long-Haul/Short-Haul Transceiver (LIU plus Framer)
Internal Software-Selectable Transmit- and Receive-Side Termination for 100Ω T1 Twisted Pair, 110Ω J1 Twisted Pair, 120Ω E1 Twisted Pair, and 75Ω 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
Controlled by 8-Bit Parallel Port Interface or Serial Peripheral Interface (SPI)
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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DS26521
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TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS26521L
Active
LQFP;64 pin;149 mm²
Outline Drawing: 21-0083 (PDF)
Land Pattern: 90-0141 (PDF)
Use pkgcode/variation: C64-8*
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