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XRT8001IP Datasheet(PDF) 1 Page - Exar Corporation |
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XRT8001IP Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 48 page  EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com Rev. 1.01 XRT8001 WAN Clock for T1 and E1 Systems October 2001-1 GENERAL DESCRIPTION The XRT8001 WAN Clock is a dual-phase-locked loop chip that generates two very low jitter output clock signals that can be used for synchronization clocks in wide area networking systems. The XRT8001 has pre- programmed multipliers and dividers that are selected via the serial port. It generates two integer multiples of 8kHz, 56kHz, and 64kHz while locked onto an incom- ing reference of 1.54MHz (T1), 2.048MHz (E1), 8kHz, 56kHz, or 64kHz The XRT8001 WAN Clock can be configured to oper- ate in one of six modes: 1. The Forward/Master Mode 2. The Reverse/Master Mode 3. The “Fractional T1/E1" Reverse/Master Mode 4. The “E1 to T1 - Forward/Master" Mode 5. The “High Speed - Reverse" Mode 6. The “Slave” Mode FEATURES • Dual Phased Locked Loops with Pre-Programmed Multipliers and Dividers • Pre-ProgrammedwithPopularFrequency Conversions for Communications Systems Part Number Package Operating Temperature Range XRT8001IP 18-Lead 300 Mil PDIP -40 °C to +85°C XRT8001ID 18-Lead 300 Mil JEDEC SOIC -40 °C to +85°C ORDERING INFORMATION Reference Clock 8kHz to 16.384 MHz Sync Out 8kHz or 64kHz Master/Slave Clock Output 1 Clock Output 2 PLL Lock Detect µµC/µµP Serial I/O FIN SYNC MSB CLK1 CLK2 LOCKDET XRT8001 3 2 8 6 13 11 SCLK SDI SDO CS 3.3V or 5V CC V Figure 1. System Diagram • Generates Output Clock Frequencies Ranging From 8kHz up to 16.384MHz • Serial Port Control for Optimal Performance • Sync Output: 8kHz or 64kHz • Low Jitter • Cascadable (Master / Slave Modes) • NoExternalComponentsNeeded • Pin Compatible with the XRT8000 • Low Power (3.3V or 5V): 40 - 100mW • - 40°C to +85°C Temperature Range • 18-Lead PDIP or SOIC Packages APPLICATIONS • T1/E1 Access Equipment (DSU/CSU) • Frame Relay Access Devices (FRAD) • Basic Rate and Primary Rate ISDN Equipment • ISDNRouters • Terminals • Remote Access Servers • T1/E1Concentrators • T1/E1 Multiplexers • T1/E1 Clock Rate Converters • Internal Timing Generators • System Synchronizers |
Similar Part No. - XRT8001IP |
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Similar Description - XRT8001IP |
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