Overview
| 64kHz/8kHz 400Hz Modes | true |
|---|---|
| BITS Rx | true |
| BITS Tx | FALSE |
| SSM | FALSE |
The XRT85L61 is an integrated E1, T1, 64KHz Centralized Clock interface for T1 (1.544Mbps) 100Ω, E1 (2.048Mbps) 75Ω or 120Ω applications. The XRT85L61 extracts either 2048kHz or 1544 kHz clock signals from an E1 (2.048MHz), T1 (1.544MHz) inputs respectively or 64kHz, 8kHz or 400kHz clock signals from the 64kHz reference clock input.
The XRT85L61 includes an on-chip crystal-less jitter attenuator with 32 bit FIFO that can either be enabled or disabled.
- Fully integrated single chip solution for E1, T1 or 64kHz clock synchronization applications.
- Extracts 2048 kHz, 1544 kHz clock and data com-ponents
- Extracts 64 KHz and 8 kHz, 400 Hz clock information
- Line Code Violation alarms
- On-chip digital clock recovery circuit
- Supports 75Ω and 120Ω (E1), 100Ω (T1) applications
- Crystal-less digital jitter attenuator with 32-bit FIFOthat can either be enabled or disabled
- Receive loss of signal (RLOS) output
- Meets Telcordia GR-1244-CORE Section 3.4.1 R3-27 specification
- Meets or exceeds T1 and E1 specifications in ITU G.703, G.775
- Single +3.3V Supply Operation
- Logic inputs accept either 3.3 V or 5 V levels
- 28 pin TSSOP package
- Pb-Free, RoHS Compliant Versions Offered
- Universal Clock Synchronization for G.703 Telecom Formats
- T1/E1 Line Receiver with Clock and Data Recovery
- DSLAM
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | XRT85L61 BITS (BUILDING Integrated TIMING SUPPLY) Clock EXTRACTOR | 1.0.2 | October 2004 | 459.8 KB |
| Schematics & Design Files | Schematic | 1.0.0 | January 2004 | 22.6 KB |
| Product Brochures | Serial Transceivers & Bridges Brochure | R03 | May 2025 | 3.6 MB |
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
|---|---|---|---|---|---|---|
| XRT85L61IG | TSSOP28 | -40 | 85 | OBS | ||
| XRT85L61IG-F | OBS |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
| Pkg Code | Details | Quantities | Dimensions |
|---|---|---|---|
| TSSOP28 |
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Notifications
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