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.
Key Features
Applications/Uses
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
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
* 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.
Devices:
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5
DS26502
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS26502LB1
LQFP;64 pin;
Dwg: 21-0083 (PDF)
Use pkgcode/variation: C64L-1*
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