Maxim Integrated DS26503L

Description
The DS26503 is a building-integrated timing-supply (BITS) clock-recovery element that also functions as a basic TI/El transceiver. It can recover a clock from TI, El, and 6312kHz synchronization timing interfaces. In TI and El modes, it can also recover the Synchronization Status Message (SSM). The transmit portion can directly interface to TI or El interfaces and source the SSM in TI and El modes. The DS26503 can translate between any of the supported inbound synchronization clock rates to any supported outbound rate. It provides a separate output to source a 6312kHz clock. The device is controlled through a parallel, serial, or hardware controller port.

Features
G.703 2048kHz Synchronization Interface Compliant
G.703 6312kHz Japanese Synchronization Interface Compliant
Interfaces to Standard T1/J1 (1.544MHz) and El (2.048MHz)
Interface to CMI-Coded TI/J1 and El
Short- and Long-Haul Line Interface
Transmit and Receive TI and El SSM Messages with Message Validation
TI/El Jitter Attenuator with Bypass Mode
Fully Independent Transmit and Receive Functionality
Internal Software-Selectable Receive- and Transmit-Side Termination for 75Ω/1000/1100/1200Ω
Monitor Mode for Bridging Applications
Accepts 16.384MHz, 12.8MHz, 8.192MHz, 4.096MHz, 2.048MHz, or 1.544MHz Master Clock
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

Applications
BITS Timing
Rate Conversion
Basic Transceiver