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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Application Specific Clock/Timing

Analog Devices Inc. AD9550BCPZ

Name: AD9550BCPZ
Brand: Analog Devices Inc.
SKU: AD9550BCPZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD9550BCPZ

Manufacturer:: Analog Devices Inc.

Category:: Application Specific Clock/Timing

Package:: 32-WFQFN Exposed Pad, CSP

Datasheet:: AD9550BCPZ.pdf

Description:: IC INTEGER-N TRANSLATOR 32-LFCSP

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Product details

Overview

AD9550BCPZ from Analog Devices is an integer-N PLL-based clock translator IC designed for wireline communication systems. It accepts a single-ended CMOS reference input (8 kHz–200 MHz), generates two independently programmable LVPECL/LVDS/CMOS outputs (up to 810 MHz), and delivers ultra-low jitter (as low as 0.39 ps rms) while operating on a single 3.3 V supply. It serves as a drop-in replacement for high-frequency VCXOs and OCXOs in SONET/SDH timing modules.

For engineers reviewing the AD9550BCPZ datasheet, AD9550BCPZ pinout, AD9550BCPZ application, or AD9550BCPZ equivalent, this page provides verified technical context, pin-level design meaning, wireline-specific frequency translation capabilities, jitter performance under Telcordia GR-253-CORE compliance, and validated alternative options for Ethernet, GPON, and T1/E1 clocking architectures.

Technical Context

The AD9550BCPZ implements a fully integrated integer-N PLL with a 3.35–4.05 GHz VCO, 20-bit feedback divider (N), and programmable input prescalers (÷5, ×2) plus R-divider to map 15 standard reference frequencies to 52 preset output pairs. Its loop filter supports three bandwidth settings (170 Hz, 20 kHz, 75 kHz) via pin-selectable charge pump and N-divider configuration.

It features dual independent output drivers (OUT1/OUT2) configurable per OM2–OM0 pins for LVPECL, LVDS, or CMOS logic levels - each with dedicated VDD pins (Pin 21 for OUT2, Pin 28 for OUT1) and static output voltage specifications (e.g., LVPECL common-mode = VDD − 1.34 V). The device performs automatic VCO band calibration at power-up and includes internal pull-up resistors on all control pins (100 kΩ on A/Y pins, 40 kΩ on OM pins).

Key Specifications

Parameter	Value and Actual Design Meaning
Input Frequency Range	8 kHz to 200 MHz single-ended CMOS; enables direct interface with telecom reference clocks (e.g., 19.44 MHz, 122.88 MHz, 155.52 MHz).
Output Frequency Range	Up to 810 MHz LVPECL/LVDS (0–805 MHz duty cycle spec), 200 MHz CMOS; supports OC-48/OC-192 line rates and GPON burst-mode timing.
Jitter Generation (12 kHz–20 MHz)	As low as 0.89 ps rms (LVPECL, 25 MHz → 125 MHz); meets Telcordia GR-253-CORE jitter generation requirements for core network equipment.
Power Consumption	185 mA typical total current at 3.3 V; split across three VDD pins (Pin 18, 21, 28) to isolate output driver noise from PLL core supply.
VCO Frequency Range	3350–4050 MHz; digitally calibrated across 128 bands to maintain phase lock under temperature drift (−40°C to +85°C).
Operating Temperature	−40°C to +85°C extended industrial range; qualified for carrier-grade base station and central office deployment.
Package	32-lead LFCSP (5 mm × 5 mm, 0.5 mm pitch); exposed die pad requires GND connection for thermal and EMI performance.

Pinout & Package

AD9550BCPZ uses a 32-lead, 5 mm × 5 mm LFCSP package with exposed die pad (EP) that must be soldered to PCB ground for thermal dissipation and signal integrity. Pin 1 is marked by dot; EP is electrically connected to GND.

Pin/Terminal	Circuit Role	Design Meaning
REF (Pin 7)	Single-ended CMOS reference input	Accepts 8 kHz–200 MHz clock; internal threshold = 1.0 V; requires DC bias at 1 V when AC-coupled.
A0–A3 (Pins 3–6)	Input frequency selection	Selects one of 15 reference frequencies (e.g., 19.44 MHz, 122.88 MHz); internal 100 kΩ pull-up; logic 0 = grounded, logic 1 = open.
Y0–Y5 (Pins 29–32, 1–2)	Output frequency pair selection	Selects one of 52 (OUT1, OUT2) frequency combinations (e.g., 155.52/77.76 MHz); internal 100 kΩ pull-up.
OM0–OM2 (Pins 12–14)	Output mode control	Configures LVPECL/LVDS/CMOS for both outputs; internal 40 kΩ pull-up; defines drive strength and termination behavior.
RESET (Pin 15)	Active-low logic reset	Resets PLL and output dividers to default state; 100 kΩ internal pull-up; min pulse width = 150 µs.
FILTER (Pin 16) / LDO (Pins 17, 19)	Loop filter interface	FILTER connects to external RC network; LDO pins require 0.47 µF decoupling to GND for stable VCO control voltage.
OUT1 (Pins 26, 27) / OUT2 (Pins 22, 23)	Differential clock outputs	LVPECL/LVDS: complementary pairs; CMOS: single-ended; each output has dedicated VDD (Pin 28 for OUT1, Pin 21 for OUT2).
VDD (Pins 18, 21, 28)	Power supply inputs	Three separate 3.3 V supply connections: Pin 18 powers core logic, Pin 21 powers OUT2 driver, Pin 28 powers OUT1 driver.
GND (Pins 8, 11, 24, 25)	Ground terminals	Four dedicated ground pins minimize ground bounce; exposed die pad (EP) must be connected to system GND.
LOCKED (Pin 20)	PLL lock status indicator	Open-drain active-high output; asserts after PLL achieves phase lock (e.g., 2 ms for medium bandwidth setting).

Key Features

Feature	Design Value
Preset pin-programmable frequency translation	Hardwired mapping of 15 input frequencies to 52 output pairs eliminates firmware dependency and reduces BOM count in telecom line cards.
Triple-output logic compatibility	Single device drives LVPECL, LVDS, or CMOS loads - enabling interoperability with legacy SerDes, modern FPGAs, and ASIC clock trees without level-shifting.
Telcordia GR-253-CORE compliance	Verified jitter generation (≤1.32 ps rms), transfer (≤0.76 ps rms), and tolerance specs ensure deployment in carrier-class SONET/SDH infrastructure.
Multi-band VCO with auto-calibration	128-band VCO and automatic centering at power-up guarantee reliable lock acquisition across −40°C to +85°C without manual tuning.
Isolated output power domains	Dedicated VDD pins for each output driver (Pin 21, Pin 28) prevent switching noise from OUT2 degrading OUT1 jitter performance.
Low-power operation	<450 mW total consumption at full output load enables dense clock fanout in space-constrained optical modules and small-cell base stations.

Applications

SONET/SDH Line Card Timing	GPON OLT Clock Synthesis
Use Scenario: Generating synchronized 155.52 MHz and 622.08 MHz clocks for OC-3/OC-12/OC-48 framer and PHY layers in metro aggregation switches. IC Role / Device Role / Timing Role: Integer-N clock translator providing jitter-clean dual outputs derived from a single 19.44 MHz reference; replaces discrete VCXO + divider chain. Use Value: Meets GR-253-CORE jitter generation (0.75 ps rms) and transfer specs, eliminating need for external jitter cleaners in cost-sensitive line cards.	Use Scenario: Producing burst-mode 125 MHz upstream and 155.52 MHz downstream clocks for GPON optical line terminal (OLT) systems. IC Role / Device Role / Timing Role: Pin-configured translator accepting 25 MHz reference and delivering precise 125/155.52 MHz pair with sub-ps jitter for TDMA synchronization. Use Value: Enables deterministic latency via fixed divider ratios (e.g., Y5–Y0 = 010111, A3–A0 = 0110), avoiding PLL relock delays during upstream grant processing.
Ethernet Synchronous Equipment Timing	T1/E1 Network Interface Unit
Use Scenario: Providing IEEE 1588 grandmaster clock outputs (125 MHz, 250 MHz) from a 25 MHz oven-controlled crystal oscillator in enterprise switches. IC Role / Device Role / Timing Role: Low-jitter frequency multiplier and divider translating 25 MHz to 125/250 MHz with <0.58 ps rms jitter (50 kHz–80 MHz band). Use Value: Achieves sub-100 ns time error accumulation over 24 hours, satisfying ITU-T G.8262 ePRTC holdover requirements without OCXO-level power draw.	Use Scenario: Generating 1.544 MHz and 2.048 MHz primary rate interface clocks for T1/E1 channel banks in central office digital cross-connect systems. IC Role / Device Role / Timing Role: Dual-output translator configured via A3–A0 = 1100 (1.544 MHz) and Y5–Y0 = 101100 to deliver matched T1/E1 frequencies from one reference. Use Value: Eliminates separate oscillators for T1 and E1 paths, reducing component count and board area while maintaining ±50 ppb frequency accuracy.

SONET/SDH Line Card Timing

GPON OLT Clock Synthesis

Use Scenario: Generating synchronized 155.52 MHz and 622.08 MHz clocks for OC-3/OC-12/OC-48 framer and PHY layers in metro aggregation switches.

IC Role / Device Role / Timing Role: Integer-N clock translator providing jitter-clean dual outputs derived from a single 19.44 MHz reference; replaces discrete VCXO + divider chain.

Use Value: Meets GR-253-CORE jitter generation (0.75 ps rms) and transfer specs, eliminating need for external jitter cleaners in cost-sensitive line cards.

Use Scenario: Producing burst-mode 125 MHz upstream and 155.52 MHz downstream clocks for GPON optical line terminal (OLT) systems.

IC Role / Device Role / Timing Role: Pin-configured translator accepting 25 MHz reference and delivering precise 125/155.52 MHz pair with sub-ps jitter for TDMA synchronization.

Use Value: Enables deterministic latency via fixed divider ratios (e.g., Y5–Y0 = 010111, A3–A0 = 0110), avoiding PLL relock delays during upstream grant processing.

Ethernet Synchronous Equipment Timing

T1/E1 Network Interface Unit

Use Scenario: Providing IEEE 1588 grandmaster clock outputs (125 MHz, 250 MHz) from a 25 MHz oven-controlled crystal oscillator in enterprise switches.

IC Role / Device Role / Timing Role: Low-jitter frequency multiplier and divider translating 25 MHz to 125/250 MHz with <0.58 ps rms jitter (50 kHz–80 MHz band).

Use Value: Achieves sub-100 ns time error accumulation over 24 hours, satisfying ITU-T G.8262 ePRTC holdover requirements without OCXO-level power draw.

Use Scenario: Generating 1.544 MHz and 2.048 MHz primary rate interface clocks for T1/E1 channel banks in central office digital cross-connect systems.

IC Role / Device Role / Timing Role: Dual-output translator configured via A3–A0 = 1100 (1.544 MHz) and Y5–Y0 = 101100 to deliver matched T1/E1 frequencies from one reference.

Use Value: Eliminates separate oscillators for T1 and E1 paths, reducing component count and board area while maintaining ±50 ppb frequency accuracy.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Si5338A-B-GM	Programmable I2C-based clock generator with fractional-N synthesis; wider output range (0.16–350 MHz) but higher jitter floor (0.95 ps rms typical).	Requires microcontroller initialization; supports dynamic reconfiguration, unlike AD9550BCPZ's fixed pin-programmed operation.	Choose Si5338A-B-GM when system-level flexibility and multi-rate support outweigh deterministic startup and lower jitter.
LMK04806BISQE/NOPB	Ultra-low-noise JESD204B-compliant clock jitter cleaner with dual-loop architecture; higher power (650 mW) and larger 48-QFN package.	Designed for RF sampling and data converter timing; includes integrated LDOs and SPI configuration not needed in wireline translation.	Choose LMK04806BISQE/NOPB only when sub-0.3 ps rms jitter and JESD204B compliance are mandatory - not for standard telecom clock distribution.

Compared with Si5338A-B-GM and LMK04806BISQE/NOPB, AD9550BCPZ offers the lowest jitter among pin-strapped translators, smallest footprint (5 mm × 5 mm), and zero-software startup - making it optimal for cost-sensitive, high-volume wireline timing where deterministic behavior and Telcordia compliance are critical.

Availability

AD9550BCPZ is available at Aetrix Electronics and suitable for SONET/SDH line cards, GPON optical line terminals, and Ethernet synchronous equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for carrier-grade deployments.

Supply support for AD9550BCPZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD9550BCPZ belongs to Analog Devices' precision clock translation product line, engineered specifically for wireline communications infrastructure where deterministic jitter performance, Telcordia compliance, and pin-programmed simplicity are required over software-configurable flexibility.

FAQ

What is the maximum output frequency supported by AD9550BCPZ in LVPECL mode?

The AD9550BCPZ supports up to 810 MHz in LVPECL mode, with guaranteed 40–60% duty cycle up to 805 MHz. This enables direct interface with OC-192 (9.953 Gbps) SerDes clock inputs and high-speed FPGA transceivers requiring clean differential timing references.

Does AD9550BCPZ require external configuration via I²C or SPI?

No, AD9550BCPZ does not support I²C or SPI. It is strictly pin-programmed using A3–A0 (input frequency), Y5–Y0 (output frequency pair), and OM2–OM0 (output logic format). All configuration is hardwired at power-up, ensuring deterministic behavior without firmware dependencies.

How is jitter performance validated for AD9550BCPZ in telecom applications?

AD9550BCPZ jitter is measured per Telcordia GR-253-CORE across multiple configurations - e.g., 0.89 ps rms (12 kHz–20 MHz) for 25 MHz → 125 MHz translation. These values are confirmed in the datasheet (Table 3) and correlate directly with phase noise plots (Figures 3–8), ensuring compliance in SONET/SDH and GPON timing subsystems.

Can AD9550BCPZ generate different logic formats on OUT1 and OUT2 simultaneously?

No. The OM2–OM0 pins configure both OUT1 and OUT2 identically - either LVPECL, LVDS, or CMOS. Independent logic format selection per output is not supported. For mixed-format requirements, external level shifters or a second AD9550BCPZ may be used.

What is the role of the exposed die pad (EP) on AD9550BCPZ?

The exposed die pad (EP) on AD9550BCPZ must be soldered to PCB ground. It serves dual purposes: thermal dissipation (reducing junction temperature rise) and RF grounding for the high-frequency VCO and output drivers - critical for maintaining sub-ps jitter and meeting EMI limits in telecom modules.

AD9550BCPZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 32-WFQFN Exposed Pad, CSP

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

PLL:: Yes

Main Purpose:: Ethernet, GPON, SONET/SHD, T1/E1

Input:: CMOS

Output:: CMOS, LVDS, LVPECL

Number of Circuits:: 1

Ratio - Input:Output:: 1:2

Differential - Input:Output:: No/Yes

Frequency - Max:: 810MHz

Voltage - Supply:: 3.135V ~ 3.465V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 32-LFCSP-WQ (5x5)

AD9550BCPZ FAQ

1.How can I place an order for AD9550BCPZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD9550BCPZ 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 AD9550BCPZ reliable?

The price and inventory of AD9550BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9550BCPZ is usually 5 days.

3.What payment methods are accepted for AD9550BCPZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9550BCPZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD9550BCPZ?

AD9550BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD9550BCPZ 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 AD9550BCPZ?

For technical support, including AD9550BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9550BCPZ requirements.

6.How does Aetrix verify that AD9550BCPZ is sourced from the original manufacturer or authorized distributors?

All AD9550BCPZ 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 AD9550BCPZ meets industry standards.

7.What is the process for return or replacement of AD9550BCPZ?

All AD9550BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD9550BCPZ, 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 AD9550BCPZ part is unused and in its original packaging.

Return procedure for AD9550BCPZ:

1.Submit a request within 90 days.

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

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