DS26503LN+

Overview

The DS26503LN+ is a building-integrated timing-supply (BITS) clock-recovery element and basic T1/E1 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 3.135V to 3.465V and supports an operating temperature range of -40°C to +85°C. The device is housed in a 64-LQFP package with dimensions of 10mm x 10mm. It features a maximum frequency of 6.312MHz and includes one circuit for clock input and output. The component integrates PLL functionality and supports standard T1, E1, and J1 interfaces.

Feature Summary

• Supports G.703 2048kHz and 6312kHz synchronization interfaces compliant with international standards.
• Interfaces to standard T1/J1 (1.544MHz) and E1 (2.048MHz), including CMI-coded variants.
• Features transmit and receive T1/E1 Synchronization Status Message (SSM) handling with message validation.
• Includes a T1/E1 jitter attenuator with bypass mode and fully independent transmit/receive functionality.

Applications

• Building-Integrated Timing-Supply (BITS) timing systems
• Telecommunications rate conversion applications
• Basic T1/E1 transceiver implementations

Procurement Notes

Verify the specific suffix 'LN' confirms the industrial temperature grade (-40°C to +85°C). Confirm the presence of the '+' suffix indicates compliance with current environmental directives. Ensure the 64-LQFP package matches the target PCB footprint requirements before procurement.

Selection Notes

Select the DS26503LN+ when industrial temperature operation is required. Verify that the 3.3V supply with 5V-tolerant I/O meets system interface levels. Ensure the design accommodates the 64-pin LQFP package constraints and provides adequate thermal dissipation for the specified operating conditions.

Part Context

This component belongs to the DS26503 series of T1/E1/J1 BITS elements. The 'LN' designation specifically denotes the extended temperature range variant compared to the standard commercial grade. It serves as a core timing and interface solution for digital hierarchy networks.

Replacement Considerations

The DS26503L is the commercial temperature version of this part. Direct substitution requires verifying if the lower temperature range is acceptable for the application environment.