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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

Analog Devices Inc. AD9576BCPZ

Name: AD9576BCPZ
Brand: Analog Devices Inc.
SKU: AD9576BCPZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD9576BCPZ

Manufacturer:: Analog Devices Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 64-WFQFN Exposed Pad, CSP

Datasheet:: AD9576BCPZ.pdf

Description:: IC CLOCK GENERATOR 64LFCSP

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Product details

Overview

AD9576BCPZ from Analog Devices is a dual-PLL asynchronous clock generator IC with two independent PLL cores (fractional-N and integer-N), 11 configurable differential output pairs, 2.5 V/3.3 V single-supply operation, −40°C to +85°C temperature range, and 64-lead 9 mm × 9 mm LFCSP package - used in Ethernet line cards, baseband units, and SATA/PCIe systems requiring low-jitter timing.

For engineers reviewing the AD9576BCPZ datasheet, AD9576BCPZ pinout, AD9576BCPZ application, or AD9576BCPZ equivalent, this page delivers verified specifications including fractional-N PLL VCO range (2375–2725 MHz), integer-N PLL VCO range (750–825 MHz), RMS jitter as low as 0.053 ps (1.875 MHz–20 MHz integration), 11-output drive format flexibility (HSTL/LVDS/HCSL/CMOS), and reference switchover capability with <220 ps phase disturbance.

Technical Context

The AD9576BCPZ integrates a high-performance fractional-N PLL (2375–2725 MHz VCO) optimized for low-jitter network clock synthesis and a separate integer-N PLL (750–825 MHz VCO) for general-purpose CPU/FPGA reference generation. Both PLLs support independent reference inputs, with automatic redundant XTAL switchover and minimal transient disturbance.

It features pin-strappable power-on configurations (PPRx) for 11 outputs and full SPI/I²C programmability. Output distribution includes three HSTL/LVDS/HCSL/1.8 V CMOS outputs and eight HSTL/LVDS/1.8 V CMOS outputs, all differential, with zero-delay alignment (as low as 3.44 ns) and sub-30 ps inter-output skew for same-divider groups.

Key Specifications

Parameter	Value and Actual Design Meaning
Fractional-N PLL VCO Range	2375 MHz to 2725 MHz - enables precise frequency synthesis for 10G/25G Ethernet and SerDes applications
Integer-N PLL VCO Range	750 MHz to 825 MHz - provides stable, low-noise clocks for FPGA fabric and processor cores
RMS Jitter (1.875 MHz–20 MHz)	0.053 ps typical at 625 MHz integer-N output - meets stringent PCIe Gen5 and IEEE 802.3bj jitter budgets
Reference Switchover Phase Disturbance	<220 ps peak - ensures seamless failover between redundant crystal sources without system timing disruption
Output Count & Type	11 pairs of differential outputs - supports multi-domain clocking for SoC, switch ASIC, and PHY layer synchronization
Supply Voltage	2.5 V or 3.3 V single supply - simplifies power delivery and reduces BOM count vs. multi-rail timing ICs
Operating Temperature	−40°C to +85°C - qualified for industrial and telecom infrastructure deployment

Pinout & Package

The AD9576BCPZ is housed in a 64-lead, 9 mm × 9 mm LFCSP (Lead Frame Chip Scale Package) with exposed thermal pad, compatible with standard reflow profiles and supporting high-density PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
VDD_REFMON, VDD_REF0–VDD_REF2	Reference input supply rails	Independent 2.5 V/3.3 V supplies per reference path - isolates noise coupling between REF0, REF1, and REF2 inputs
VDD_PLL0, VDD_VCO0, VDD_M0–VDD_M1	Fractional-N PLL core supplies	Dedicated rails for PLL0, VCO0, and M-divider blocks - enables optimized power integrity for ultra-low-jitter synthesis
VDD_PLL1, VDD_VCO1	Integer-N PLL core supplies	Separate regulation for PLL1/VCO1 - prevents interference with fractional-N PLL performance
VDD_OUT01–VDD_OUT10	Output driver supplies	Per-output-group supply pins - allows mixed-logic-type operation (e.g., LVDS on OUT0–OUT3, HCSL on OUT8–OUT10) with independent voltage control
REF0+, REF0−, REF1+, REF1−, REF2	Differential/single-ended reference inputs	Three independent reference inputs - supports primary/backup XTALs plus external clock, with automatic monitoring and switchover
OUT0+ to OUT10−	Differential clock outputs	11 fully differential output pairs - each pair (e.g., OUT0+/OUT0−) delivers one logic-level clock signal; no single-ended outputs
PPR0–PPR3	Pin-strap configuration inputs	Four logic-level inputs that set power-on default divider ratios and output formats - eliminates need for boot-time SPI programming
LD_0, LD_1, REF_SW, REF_STATUS	Status and monitoring outputs	Open-drain status flags - enable real-time lock detection, reference activity monitoring, and switchover event signaling to host controller

Key Features

Feature	Design Value
Integrated loop filter (fractional-N PLL)	Requires only one external capacitor - eliminates discrete loop filter design effort and component count
Automatic redundant XTAL switchover	Sub-220 ps phase disturbance with smooth transition - maintains deterministic timing during crystal failure without software intervention
Preset frequency translations via PPRx	16+ factory-configurable output frequencies per reference (e.g., 24.576 MHz, 156.25 MHz, 644.5313 MHz) - accelerates bring-up and reduces firmware dependencies
Dual independent reference monitoring	Real-time validation of REF0 and REF1 signal integrity - enables failover decisioning based on actual input quality, not just presence
Zero-delay output alignment	3.44 ns max propagation delay (REF0 → OUT0) - supports tight setup/hold timing margins in high-speed SerDes and memory interfaces

Applications

Ethernet Line Cards	Baseband Units (BBUs)
Use Scenario: 10G/25G/100G Ethernet switch fabric requiring synchronous and asynchronous clock domains across MAC, PHY, and packet processor subsystems. IC Role / Device Role / Timing Role: Asynchronous clock generator providing independent, low-jitter clocks for SerDes lanes, switch ASIC, and control plane processors. Use Value: Dual-PLL architecture enables simultaneous generation of IEEE 1588-compliant time-of-day clocks and SerDes reference clocks with <0.053 ps RMS jitter, eliminating external jitter cleaners.	Use Scenario: 4G/5G wireless infrastructure where baseband processing demands tightly aligned sampling clocks and flexible frequency agility across multiple radio bands. IC Role / Device Role / Timing Role: Centralized clock source delivering synchronized 122.88 MHz, 153.6 MHz, and 307.2 MHz clocks to ADC/DACs, FPGAs, and RF transceivers. Use Value: Pin-strapped presets for 30.72 MHz and 19.44 MHz crystal references allow rapid configuration of LTE/NR-compliant frequencies without SPI initialization.
SATA/PCIe Storage Controllers	Optical Transport Networking (OTN)
Use Scenario: High-reliability storage systems using PCIe Gen4/Gen5 SSD controllers and SATA 6 Gbps PHYs, requiring strict jitter compliance and redundancy. IC Role / Device Role / Timing Role: Primary clock synthesizer generating 100 MHz PCIe reference, 75 MHz SATA reference, and 25 MHz management clocks from a single 25 MHz crystal. Use Value: Redundant REF2 XTAL input with automatic switchover ensures continuous clock availability during crystal aging or shock-induced failure - critical for enterprise RAID arrays.	Use Scenario: OTN framer and mapper ICs needing precise 622.08 MHz, 2.48832 GHz, and 9.95328 GHz derived clocks with sub-100 fs integrated jitter. IC Role / Device Role / Timing Role: Low-phase-noise clock generator feeding multiplexer/demultiplexer timing recovery circuits and FEC engines. Use Value: Fractional-N PLL's 2375–2725 MHz VCO range supports direct synthesis of OC-192/STM-64 rates with <0.314 ps RMS jitter (12 kHz–20 MHz), meeting ITU-T G.823/G.825 specs.

Ethernet Line Cards

Baseband Units (BBUs)

Use Scenario: 10G/25G/100G Ethernet switch fabric requiring synchronous and asynchronous clock domains across MAC, PHY, and packet processor subsystems.

IC Role / Device Role / Timing Role: Asynchronous clock generator providing independent, low-jitter clocks for SerDes lanes, switch ASIC, and control plane processors.

Use Value: Dual-PLL architecture enables simultaneous generation of IEEE 1588-compliant time-of-day clocks and SerDes reference clocks with <0.053 ps RMS jitter, eliminating external jitter cleaners.

Use Scenario: 4G/5G wireless infrastructure where baseband processing demands tightly aligned sampling clocks and flexible frequency agility across multiple radio bands.

IC Role / Device Role / Timing Role: Centralized clock source delivering synchronized 122.88 MHz, 153.6 MHz, and 307.2 MHz clocks to ADC/DACs, FPGAs, and RF transceivers.

Use Value: Pin-strapped presets for 30.72 MHz and 19.44 MHz crystal references allow rapid configuration of LTE/NR-compliant frequencies without SPI initialization.

SATA/PCIe Storage Controllers

Optical Transport Networking (OTN)

Use Scenario: High-reliability storage systems using PCIe Gen4/Gen5 SSD controllers and SATA 6 Gbps PHYs, requiring strict jitter compliance and redundancy.

IC Role / Device Role / Timing Role: Primary clock synthesizer generating 100 MHz PCIe reference, 75 MHz SATA reference, and 25 MHz management clocks from a single 25 MHz crystal.

Use Value: Redundant REF2 XTAL input with automatic switchover ensures continuous clock availability during crystal aging or shock-induced failure - critical for enterprise RAID arrays.

Use Scenario: OTN framer and mapper ICs needing precise 622.08 MHz, 2.48832 GHz, and 9.95328 GHz derived clocks with sub-100 fs integrated jitter.

IC Role / Device Role / Timing Role: Low-phase-noise clock generator feeding multiplexer/demultiplexer timing recovery circuits and FEC engines.

Use Value: Fractional-N PLL's 2375–2725 MHz VCO range supports direct synthesis of OC-192/STM-64 rates with <0.314 ps RMS jitter (12 kHz–20 MHz), meeting ITU-T G.823/G.825 specs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar asynchronous clock generation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5341-B-GM	4-output, 4-input, multi-loop clock generator with integrated DCO; higher integration but no automatic XTAL switchover	Targets datacenter switches with software-defined clock trees; lacks hardware-based reference failover	Select Si5341-B-GM when SPI-controlled dynamic reconfiguration is prioritized over autonomous redundancy
LTC6957IUF-3#PBF	Single-output, ultra-low-noise jitter cleaner (65 fs); no multi-PLL synthesis or output count scalability	Used for cleaning noisy clocks before high-speed ADCs; cannot replace AD9576BCPZ's multi-domain clock generation	Select LTC6957IUF-3#PBF only for single-channel jitter attenuation, not system-level clock distribution

Compared with Si5341-B-GM and LTC6957IUF-3#PBF, the AD9576BCPZ uniquely combines dual-PLL synthesis, 11-output flexibility, and hardware-automated XTAL switchover - making it the only option for telecom line cards requiring both high channel count and fail-safe timing resilience without host processor involvement.

Availability

AD9576BCPZ is available at Aetrix Electronics and suitable for Ethernet line cards, baseband units, and SATA/PCIe storage controllers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for AD9576BCPZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The AD9576BCPZ belongs to Analog Devices' AD95xx clock generation product line, engineered specifically for carrier-grade networking and wireless infrastructure where deterministic timing, multi-reference redundancy, and ultra-low jitter are non-negotiable system requirements.

FAQ

What is the maximum output frequency supported by AD9576BCPZ?

The AD9576BCPZ supports up to 1250 MHz on OUT4–OUT7 (HSTL/LVDS) and OUT0–OUT3 (HSTL/LVDS), and 1000 MHz on OUT8–OUT10 (HSTL/LVDS/HCSL). Full-swing CMOS outputs on OUT8–OUT10 operate up to 250 MHz. These limits are defined by the internal dividers and output driver architectures - exceeding them risks timing violation or degraded jitter performance. The AD9576BCPZ datasheet specifies these values under 2.5 V/3.3 V supply and −40°C to +85°C conditions.

Does AD9576BCPZ support automatic switchover between two crystal references?

Yes, the AD9576BCPZ supports automatic redundant XTAL switchover between REF0 and REF1 with minimal transient impact: <220 ps instantaneous phase disturbance and <350 ppm instantaneous frequency disturbance. This function operates independently of host software, using internal reference monitoring circuitry. REF2 serves as a third optional crystal input, but automatic switchover is only implemented between REF0 and REF1. The AD9576BCPZ implements this via dedicated hardware logic, not SPI-triggered state machines.

What output logic formats does AD9576BCPZ support, and how are they assigned?

The AD9576BCPZ supports HSTL, LVDS, HCSL, 1.8 V CMOS, 2.5 V CMOS, and 3.3 V CMOS across its 11 output pairs. OUT0–OUT7 support HSTL, LVDS, or 1.8 V CMOS; OUT8–OUT10 add HCSL and full-swing CMOS (2.5 V/3.3 V). Format selection is per-output-group via SPI registers or PPRx pin strapping. Each output pair (e.g., OUT2+/OUT2−) must use the same format - mixed logic types within a pair are not supported. The AD9576BCPZ requires appropriate termination (e.g., 100 Ω differential for LVDS/HSTL) per selected format.

Can AD9576BCPZ generate both integer-N and fractional-N outputs simultaneously?

Yes, the AD9576BCPZ can generate integer-N and fractional-N outputs concurrently: the fractional-N PLL (PLL0) drives OUT0–OUT7, while the integer-N PLL (PLL1) drives OUT8–OUT10. This allows, for example, 156.25 MHz (integer-N, low-jitter) for Ethernet PHYs and 644.5313 MHz (fractional-N, agile) for SerDes CDRs from the same device. The AD9576BCPZ achieves this through physically separate PLL cores, VCOs, and distribution paths - no shared resources limit concurrent operation.

What is the minimum supply voltage required for AD9576BCPZ operation?

The AD9576BCPZ requires a minimum supply voltage of 2.38 V on all VDD_x pins (including VDD_REFMON, VDD_PLL0, VDD_OUT01, etc.) for guaranteed operation across −40°C to +85°C. While 2.5 V ±5% (2.375–2.625 V) and 3.3 V ±10% (2.97–3.63 V) are the nominal supported rails, operation below 2.38 V may result in undefined behavior, failed lock detection, or increased jitter. The AD9576BCPZ datasheet specifies 2.38 V as the absolute minimum across all supply domains - not just the main IO rail.

AD9576BCPZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 64-WFQFN Exposed Pad, CSP

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Type:: Clock Generator, Frequency Synthesizer

PLL:: Yes

Input:: Clock, Crystal

Output:: CMOS, HCSL, HSTL, LVDS

Number of Circuits:: 1

Ratio - Input:Output:: 3:11

Differential - Input:Output:: Yes/Yes

Frequency - Max:: 1.25GHz

Divider/Multiplier:: Yes/No

Voltage - Supply:: 2.38V ~ 3.63V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 64-LFCSP (9x9)

AD9576BCPZ FAQ

1.How can I place an order for AD9576BCPZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD9576BCPZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AD9576BCPZ reliable?

The price and inventory of AD9576BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9576BCPZ is usually 5 days.

3.What payment methods are accepted for AD9576BCPZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9576BCPZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD9576BCPZ?

AD9576BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD9576BCPZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AD9576BCPZ?

For technical support, including AD9576BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9576BCPZ requirements.

6.How does Aetrix verify that AD9576BCPZ is sourced from the original manufacturer or authorized distributors?

All AD9576BCPZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9576BCPZ meets industry standards.

7.What is the process for return or replacement of AD9576BCPZ?

All AD9576BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD9576BCPZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AD9576BCPZ part is unused and in its original packaging.

Return procedure for AD9576BCPZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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