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Analog Devices Inc. AD9546BCPZ-REEL7
- Part No.:
- AD9546BCPZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 48-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD9546BCPZ-REEL7.pdf
- Description:
- IC CLOCK SYNCHRONIZER 48LFCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AD9546BCPZ-REEL7 from Analog Devices is a dual digital phase-locked loop (DPLL) digitized clock synchronizer for precision timing transport in telecom and packet network infrastructure. It synchronizes 1 Hz to 750 MHz physical layer clocks, provides jitter cleaning of noisy references, supports ITU-T G.8262 and G.8273.2 Class D compliance, and delivers 10 programmable clock outputs (LVDS/HCSL/CML or single-ended) with sub-picoHz auxiliary NCO resolution.
For engineers reviewing the AD9546BCPZ-REEL7 datasheet, AD9546BCPZ-REEL7 pinout, AD9546BCPZ-REEL7 application, or AD9546BCPZ-REEL7 equivalent, key selection criteria include dual-DPLL holdover performance, IEEE 1588 servo support via two auxiliary NCOs, reference validation down to ±50 ppb, and digitized clocking architecture enabling precise time-stamp egress/ingress for boundary clock implementations.
Technical Context
The AD9546BCPZ-REEL7 implements two independent DPLLs with 24-bit fractional dividers and programmable digital loop filters (0.0001 Hz–1850 Hz), each capable of frequency translation and jitter attenuation. Its digitized clocking subsystem includes nine UTS blocks for time-stamp egress and two IUTS blocks for ingress, enabling precise phase alignment across distributed endpoints.
It integrates analog PLLs (APLLs) for low-jitter output generation, crosspoint mux routing between up to eight reference inputs and DPLLs, and embedded modulation support for SyncE and PTP applications. Holdover operation maintains <100 ppb frequency accuracy over −40°C to +85°C using internal temperature compensation and crystal/TCXO hybrid timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Dual DPLL Range | 1 Hz to 750 MHz input synchronization with jitter cleaning; enables stratum-level holdover and hitless switchover in telecom timing systems. |
| Output Channels | 10 total: 5 differential pairs configurable as LVDS/HCSL/CML or 10 single-ended outputs (1 Hz–500 MHz); supports JESD204B SYSREF distribution. |
| Auxiliary NCO Resolution | <1.37 pHz (1 Hz–65,535 Hz); provides precise phase feedback for IEEE 1588 v2 servo loops in boundary clocks. |
| Reference Monitoring | Detects frequency deviation as low as ±50 ppb; ensures continuous validation against ITU-T G.8273.2 Class D requirements. |
| Time Stamp Capability | 9 UTS (egress) + 2 IUTS (ingress) blocks; enables accurate timestamping for PTP transparent clock and boundary clock functions. |
| Power Supply | Single 1.8 V supply with internal regulation; simplifies power design while maintaining low-noise performance across temperature range. |
| Package | 48-lead LFCSP (7 mm × 7 mm); supports high-density PCB layouts in 5G baseband and OTN line cards. |
Pinout & Package
The AD9546BCPZ-REEL7 is housed in a 48-lead LFCSP (7 mm × 7 mm) package with exposed thermal pad, rated for −40°C to +85°C operation. Pin functions are defined per Analog Devices AD9546 Rev. 0 datasheet, Page 39.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF0P/REF0N | Differential reference input pair | Accepts primary timing reference (e.g., SyncE or GPS-disciplined OCXO) with skew-controlled coupling into DPLL0. |
| OUT0P/OUT0N | Differential clock output pair | Configurable as LVDS/HCSL/CML; delivers cleaned, phase-aligned output for ADC/DAC SYSREF or radio front-end clocks. |
| M0–M6 | Multi-function control/status pins | Programmable as serial port interface (SPI), interrupt request (IRQ), or status indicators (e.g., LOCK, HOLDOVER). |
| XOA/XOB | Crystal oscillator input | Connects to external 10–54 MHz fundamental-mode crystal; enables low-phase-noise system clock generation with internal compensation. |
| SDO/SDI/SCLK/CSB | 4-wire SPI interface | Enables full register configuration, real-time monitoring, and EEPROM initialization without external microcontroller dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Dual DPLL with 24-bit fractional division | Enables simultaneous synchronization to two independent references with independent loop bandwidth tuning for optimal jitter transfer and holdover trade-offs. |
| 9 UTS + 2 IUTS time stamp blocks | Supports precise time-of-day alignment across multiple network interfaces-critical for ITU-T G.8273.2 Class D boundary clock certification. |
| Embedded modulation support | Allows transport of modulated clock signals (e.g., SyncE ESMC) without external demodulation circuitry, reducing BOM count and board area. |
| Autonomous EEPROM initialization | Permits power-on self-configuration without host processor involvement-ideal for headless carrier-grade equipment and remote small cells. |
| Temperature-compensated holdover | Maintains <100 ppb frequency stability during reference loss by combining internal temperature sensor data with crystal aging models. |
Applications
| 5G Base Station Timing | IEEE 1588 Boundary Clock |
|---|---|
Use Scenario: Synchronizing macro and small cell radios to GNSS and packet-based PTP sources in O-RAN compliant deployments. IC Role / Device Role / Timing Role: Dual-DPLL digitized clock synchronizer providing zero-delay phase buildout and hitless reference switchover between GPS and SyncE. Use Value: Meets ITU-T G.8273.2 Class D phase error limits (<±1.5 μs) and holdover stability (<100 ppb) required for fronthaul timing integrity. | Use Scenario: Implementing telecom-compliant boundary clocks in metro aggregation switches supporting PTP v2 and SyncE. IC Role / Device Role / Timing Role: Digitized clock node with UTS/IUTS blocks performing precise time stamping, delay measurement, and servo-controlled phase alignment. Use Value: Enables sub-microsecond timestamp accuracy and deterministic latency compensation-verified per IEEE 1588-2019 Annex K test procedures. |
| OTN/SDH Line Card Clocking | JESD204B SYSREF Distribution |
Use Scenario: Delivering Stratum 3e-compliant clocks with jitter cleaning to OTN framers and SDH multiplexers in optical transport equipment. IC Role / Device Role / Timing Role: Jitter cleaner and frequency translator generating low-jitter outputs from noisy network-derived references (e.g., recovered SyncE). Use Value: Achieves <100 fs RMS random jitter (12 kHz–20 MHz) on 156.25 MHz outputs-meeting GR-253-CORE and ITU-T G.823 mask requirements. | Use Scenario: Distributing synchronized SYSREF signals to multi-channel ADC/DAC arrays in radar and communications transceivers. IC Role / Device Role / Timing Role: Digitized clock distributor with N-shot and PRBS output modes supporting JESD204B subclass 1 timing alignment. Use Value: Provides deterministic phase relationship between SYSREF and device clock (≤100 ps skew across 10 outputs), enabling coherent sampling across 16+ channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitized clock synchronizer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5345-A-A06981-GM | Quad DPLL with higher integration (integrated VCO, no external crystal required); lacks IUTS/UTS timestamping blocks. | Better suited for compact, cost-sensitive SyncE line cards where full PTP boundary clock functionality is not required. | Select when minimizing external components and footprint is prioritized over IEEE 1588 timestamping capability. |
| LTC6957-3IUF#PBF | Single DPLL with integrated jitter cleaner only; no auxiliary NCOs, no UTS/IUTS, no holdover intelligence or temperature compensation. | Applicable for simpler jitter cleanup tasks in non-telecom applications (e.g., instrumentation clocks), not for G.8273.2-compliant systems. | Select only for basic jitter attenuation where telecom timing standards, holdover, or PTP servo support are unnecessary. |
Compared with Si5345-A-A06981-GM and LTC6957-3IUF#PBF, the AD9546BCPZ-REEL7 uniquely combines dual-DPLL architecture, 9+2 time stamp blocks, and autonomous temperature-compensated holdover-making it the only option qualified for ITU-T G.8273.2 Class D boundary clocks requiring both precision phase alignment and long-term stability during reference loss.
Availability
AD9546BCPZ-REEL7 is available at Aetrix Electronics and suitable for 5G base station timing, optical transport network (OTN) line cards, IEEE 1588 boundary clocks, synchronous Ethernet (SyncE) equipment, and JESD204B converter clocking requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AD9546BCPZ-REEL7 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, headquartered in Norwood, MA, serving communications, industrial, automotive, and aerospace markets.
The AD9546BCPZ-REEL7 belongs to Analog Devices' precision timing portfolio, designed specifically for telecom infrastructure requiring ITU-T-compliant synchronization, digitized clock transport, and robust holdover under dynamic network conditions.
FAQ
What is the primary function of the AD9546BCPZ-REEL7 in telecom timing systems?
The AD9546BCPZ-REEL7 serves as a dual digital phase-locked loop (DPLL) digitized clock synchronizer that aligns and cleanses incoming reference clocks (1 Hz–750 MHz) for use in 5G, OTN, and PTP infrastructure. It enables hitless reference switching, sub-picoHz auxiliary NCO control for IEEE 1588 servos, and meets ITU-T G.8273.2 Class D requirements-making AD9546BCPZ-REEL7 essential for boundary clock and stratum-compliant timing applications.
Does the AD9546BCPZ-REEL7 support IEEE 1588 Version 2 servo functionality?
Yes, the AD9546BCPZ-REEL7 includes two independent, programmable auxiliary NCOs (1 Hz–65,535 Hz, resolution <1.37 pHz) explicitly designed for IEEE 1588 Version 2 servo feedback in PTP boundary clock implementations. These NCOs interface directly with UTS/IUTS timestamp blocks to close the phase control loop-confirming AD9546BCPZ-REEL7's role in certified G.8273.2 Class D timing nodes.
What reference validation accuracy does the AD9546BCPZ-REEL7 provide?
The AD9546BCPZ-REEL7 continuously monitors reference inputs for frequency deviation as low as ±50 ppb (5 × 10⁻⁸), meeting stringent ITU-T G.8273.2 Class D validation thresholds. This capability is implemented via dedicated reference monitor circuits with configurable decision time and discontinuity detection-ensuring AD9546BCPZ-REEL7 remains locked only to references within spec-defined stability windows.
Can the AD9546BCPZ-REEL7 operate without an external microcontroller?
Yes, the AD9546BCPZ-REEL7 supports autonomous initialization via external EEPROM, allowing full register configuration and startup sequencing without host processor intervention. Its 4-wire SPI interface (SDO/SDI/SCLK/CSB) enables optional runtime reconfiguration, but AD9546BCPZ-REEL7 is fully functional as a standalone timing IC-ideal for headless telecom equipment and remote small cell deployments.
What packaging and thermal specifications apply to the AD9546BCPZ-REEL7?
The AD9546BCPZ-REEL7 is packaged in a 48-lead LFCSP (7 mm × 7 mm) with exposed thermal pad, rated for operation from −40°C to +85°C. It integrates an on-die temperature sensor with alarm output and uses internal compensation algorithms to maintain <100 ppb holdover accuracy across this range-confirmed in AD9546 Rev. 0 datasheet Section "Holdover Specifications" and "Temperature Sensor Specifications".
AD9546BCPZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock Synchronizer
- PLL:
- Yes
- Input:
- Clock
- Output:
- Clock, CML, HCSL
- Number of Circuits:
- 2
- Ratio - Input:Output:
- 2:6
- Differential - Input:Output:
- Yes/Yes
- Frequency - Max:
- 2.415GHz
- Divider/Multiplier:
- Yes/Yes
- Voltage - Supply:
- 1.71V ~ 1.89V, 1.71V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-LFCSP (7x7)
AD9546BCPZ-REEL7 FAQ
1.How can I place an order for AD9546BCPZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9546BCPZ-REEL7 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 AD9546BCPZ-REEL7 reliable?
The price and inventory of AD9546BCPZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9546BCPZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD9546BCPZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9546BCPZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9546BCPZ-REEL7?
AD9546BCPZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9546BCPZ-REEL7 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 AD9546BCPZ-REEL7?
For technical support, including AD9546BCPZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9546BCPZ-REEL7 requirements.
6.How does Aetrix verify that AD9546BCPZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD9546BCPZ-REEL7 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 AD9546BCPZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD9546BCPZ-REEL7?
All AD9546BCPZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD9546BCPZ-REEL7, 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 AD9546BCPZ-REEL7 part is unused and in its original packaging.
Return procedure for AD9546BCPZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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