DS26503L+

Overview

The DS26503L+ 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 0°C to +70°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 a PLL for clock recovery. The component accepts master clocks of 16.384MHz, 12.8MHz, 8.192MHz, 4.096MHz, 2.048MHz, or 1.544MHz.

Feature Summary

• Supports T1, E1, J1, and 6312kHz synchronization interfaces with G.703 compliance.
• Includes a crystal-less jitter attenuator with bypass mode and limit trip indication.
• Features software-selectable receive/transmit termination for 75Ω, 100Ω, 110Ω, and 120Ω lines.
• Provides 8-bit parallel (Intel/Motorola), serial (SPI), or hardware control ports.

Applications

• BITS Timing
• Rate Conversion
• Basic Transceiver

Procurement Notes

Verify the specific suffix 'L' indicates the commercial temperature range (0°C to +70°C). Confirm the package type is 64-LQFP. Check for any manufacturer errata associated with this revision before finalizing procurement decisions.

Selection Notes

Select the DS26503L+ for applications requiring 0°C to +70°C operation. For industrial temperatures (-40°C to +85°C), consider the DS26503LN variant. Ensure the design accommodates 3.3V supply with 5V-tolerant I/O requirements.

Part Context

This component belongs to the DS26503 series of T1/E1/J1 BITS elements. It serves as a fundamental building block for digital hierarchy electrical interfaces, supporting both short-haul and long-haul line interface applications.

Replacement Considerations

The DS26503LN is the industrial temperature grade equivalent. Verify pin compatibility and register mapping if substituting between variants.

FAQ

What master clock frequencies are supported?

The device accepts 16.384MHz, 12.8MHz, 8.192MHz, 4.096MHz, 2.048MHz, or 1.544MHz master clocks.

Does the device support CMI coding?

Yes, it interfaces to CMI-coded T1/J1 and E1 signals.

How is the device controlled?

It can be controlled via an 8-bit parallel port (multiplexed/non-multiplexed, Intel/Motorola), a serial SPI port, or a hardware controller port.