AD809BR

Overview

The AD809BR is a frequency synthesizer providing a 155.52 MHz ECL/PECL output clock from 19.44 MHz or 9.72 MHz reference signals. It operates on a single +5 V or –5.2 V supply, consuming 90 mW (17 mA typical). The device features an integrated VCO and input multiplexer for TTL/CMOS/ECL/PECL inputs. Output jitter is typically 2.0 degrees RMS. It is housed in a 16-pin narrow SOIC package with an operating temperature range of –40°C to +85°C.

Feature Summary

• Frequency synthesis to 155.52 MHz via ×8 or ×16 multiplication
• Input reference signal select mux for 19.44 MHz or 9.72 MHz sources
• Low power consumption of 90 mW at single supply operation
• Output jitter specification of 2.0 degrees RMS

Applications

• SONET/SDH systems
• Fiber in the Loop systems
• Distributed timing architectures

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation. Suffixes such as REEL7 indicate reel packaging quantities. Confirm that the component meets RoHS requirements and check for any discontinuation notices or lifecycle status updates prior to procurement.

Selection Notes

Select the AD809BR when a 155.52 MHz clock is required from lower frequency references. Ensure the input signal matches the supported voltage levels (TTL/CMOS or PECL/ECL). Verify that the application environment stays within the –40°C to +85°C temperature range and that the 16-pin SOIC package fits the board layout constraints.

Part Context

The AD809BR belongs to the AD809 series manufactured by Analog Devices Inc. It is designed specifically for generating high-frequency bit clocks in telecommunications infrastructure. The BR variant denotes the commercial temperature range extension and the SOIC package style.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.