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DS26502 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS26502 Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 125 page  1 of 125 REV: 053107 Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. GENERAL DESCRIPTION The DS26502 is a building-integrated timing- supply (BITS) clock-recovery element. It also functions as a basic T1/E1 transceiver. The receiver portion can recover a clock from T1, E1, 64kHz composite clock (64KCC), and 6312kHz synchronization timing interfaces. In T1 and E1 modes, the Synchronization Status Message (SSM) can also be recovered. The transmit portion can directly interface to T1, E1, or 64KCC synchronization interfaces as well as source the SSM in T1 and E1 modes. The DS26502 can translate between any of the supported inbound synchronization clock rates to any supported outbound rate. A separate output is provided to source a 6312kHz clock. The device is controlled through a parallel, serial, or hardware controller port. APPLICATIONS BITS Timing Rate Conversion ORDERING INFORMATION PART TEMP RANGE PIN-PACKAGE DS26502L 0°C to +70°C 64 LQFP DS26502LN -40°C to +85°C 64 LQFP FEATURES G.703 2048kHz Synchronization Interface Compliant G.703 64kHz Centralized (Option A) and Codirectional Timing Interface Compliant G.703 Appendix II 64kHz and 6312kHz Japanese Synchronization Interface Compliant Interfaces to Standard T1/J1 (1.544MHz) and E1 (2.048MHz) Interface to CMI-Coded T1/J1 and E1 Short- and Long-Haul Line Interface Transmit and Receive T1 and E1 SSM Messages with Message Validation T1/E1 Jitter Attenuator with Bypass Mode Fully Independent Transmit and Receive Functionality Internal Software-Selectable Receive- and Transmit-Side Termination for 75Ω/100Ω/110Ω/120Ω T1, E1, and Composite Clock Interfaces Monitor Mode for Bridging Applications Accepts 16.384MHz, 12.8MHz, 8.192MHz, 4.096MHz, 2.048MHz, or 1.544MHz Master Clock 64kHz, 8kHz, and 400Hz Outputs in Composite Clock Mode 8-Bit Parallel Control Port, Multiplexed or Nonmultiplexed, Intel or Motorola Serial (SPI) Control Port Hardware Control Mode Provides LOS, AIS, and LOF Indications Through Hardware Output Pins Fast Transmitter-Output Disable Through Device Pin for Protection Switching IEEE 1149.1 JTAG Boundary Scan 3.3V Supply with 5V Tolerant Inputs and Outputs DS26502 T1/E1/J1/64KCC BITS Element www.maxim-ic.com |
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