Part A
AD9516-4BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1951 PCS
- Package
- LFCSP-64
- Series
- Horário - Geradores de relógios, PLLs, Sintetizadores de Frequências
Replacement verdict
Not a drop-in replacement
The AD9514BCPZ and AD9516-4BCPZ are not drop-in replacements for one another. Although both are Analog Devices clock distribution ICs in the same 48-lead LFCSP package, they differ fundamentally in output architecture, channel count, and integration level, so the AD9516-4BCPZ cannot be substituted for the AD9514BCPZ without a full board and firmware redesign.
Different output type
Different channel count
Different integrated VCO
Different divider architecture
Parts at a glance
Part B
AD9514BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6031 PCS
- Package
- LFCSP-32
- Series
- Horário-Horário - Clock Buffers, Drivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9514BCPZ | AD9516-4BCPZ | Why it matters |
|---|---|---|---|
| Number of Outputs | 3 (LVPECL, LVDS, CMOS configurable) | 6 (LVPECL, LVDS, CMOS configurable) | Output count determines how many clock destinations can be driven from a single device; a board needing more clocks cannot substitute a lower-output part. |
| On-Chip VCO | No (external VCO/VCXO required) | Yes (integrated VCO, ~2.4 GHz to 2.9 GHz) | An integrated VCO removes the need for an external oscillator and simplifies the clock generation chain, affecting board area and BOM. |
| Input Frequency Range | Up to 1.6 GHz | Up to 2.4 GHz (reference input) | The maximum input frequency limits which reference clocks can be accepted, which is critical for high-speed converter and RF applications. |
| Output Frequency Range | Up to 1.6 GHz | Up to 1.6 GHz (LVPECL/LVDS) | Output frequency capability determines whether the device can clock the target data converters or logic directly. |
| Package | 32-Lead LFCSP (5 mm x 5 mm) | 64-Lead LFCSP (9 mm x 9 mm) | Package footprint and pin count affect PCB layout, thermal performance, and whether a drop-in replacement is physically possible. |
| Supply Voltage | 3.3 V | 3.3 V | Supply voltage compatibility ensures the device can share the same power rail as surrounding circuitry without additional regulation. |
| Divider/Programmability | Programmable dividers via SPI/serial interface | Programmable dividers and delay via SPI/serial interface | Programmability enables flexible clock ratios and phase adjustment, which is essential for synchronizing multiple clock domains. |
| Additive Jitter | Low additive jitter (typ. ~0.2 ps RMS) | Low additive jitter (typ. ~0.2 ps RMS) | Jitter directly impacts signal integrity and SNR in high-speed data converters; comparable jitter supports similar performance. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range compatibility ensures reliable operation in harsh environments and matching qualification requirements. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9516-4BCPZ | AD9514BCPZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Clock Generator, Fanout Distribution | Fanout Buffer (Distribution), Divider |
| PLL | Yes | - |
| Input | Clock | Clock |
| Output | CMOS, LVDS, LVPECL | CMOS, LVDS, LVPECL |
| Number of Circuits | 1 | 1 |
| Ratio - Input: Output | 1:14 | 1:3 |
| Differential - Input: Output | Yes/Yes | Yes/Yes |
| Frequency - Max | 2.95GHz | 1.6 GHz |
| Divider / Multiplier | Yes/No | - |
| Voltage - Supply | 3.135V ~ 3.465V | 3.135V ~ 3.465V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the AD9514BCPZ and the AD9516-4BCPZ?
The AD9514BCPZ is a 1.6 GHz clock distribution IC featuring a single differential input, three LVPECL outputs, and one LVDS output, with an integrated integer divider (÷1 to ÷32). The AD9516-4BCPZ is a more highly integrated clock generator and distribution IC that includes an on-chip VCO (2.5 GHz), a PLL with programmable dividers, and up to six outputs (LVPECL, LVDS, or CMOS), along with an integrated integer divider. The AD9516-4BCPZ thus provides clock generation plus distribution, while the AD9514BCPZ is a distribution-only device.
Are the AD9514BCPZ and AD9516-4BCPZ pin-compatible or package-compatible?
No. Both devices are offered in a 32-lead LFCSP (5 mm × 5 mm) package, but their pin functions and internal architectures differ significantly. The AD9516-4BCPZ includes additional pins for the on-chip VCO, PLL loop filter, and reference inputs, so the two are not pin-compatible and cannot be interchanged on the same PCB without redesign.
Do both devices support the same output logic levels?
Both devices support LVPECL and LVDS output logic levels. The AD9514BCPZ provides three LVPECL outputs and one LVDS output. The AD9516-4BCPZ provides up to six outputs that can be configured as LVPECL, LVDS, or CMOS, depending on the specific output assignment. The AD9516-4BCPZ therefore offers greater output flexibility and higher output count.
Which device includes an integrated PLL and VCO?
Only the AD9516-4BCPZ includes an integrated PLL and on-chip VCO (2.5 GHz). The AD9514BCPZ does not contain a PLL or VCO; it is a clock distribution IC that accepts an external clock input and distributes divided outputs. Designs requiring clock generation from a reference must use the AD9516-4BCPZ or an external PLL/VCO solution.
How do the maximum output frequencies compare?
The AD9514BCPZ supports LVPECL outputs up to 1.6 GHz and LVDS outputs up to 800 MHz. The AD9516-4BCPZ, using its integrated 2.5 GHz VCO and LVPECL outputs, supports output frequencies up to 1.6 GHz for LVPECL and up to 800 MHz for LVDS, with the VCO tuning range covering approximately 2.5 GHz. Both devices are specified for similar maximum LVPECL output rates, but only the AD9516-4BCPZ can generate those rates from an on-chip VCO.
Can the AD9514BCPZ be used as a drop-in replacement for the AD9516-4BCPZ in an existing design?
No. Because the AD9516-4BCPZ integrates a PLL and VCO that the AD9514BCPZ lacks, and because the pinouts and control interfaces differ, the AD9514BCPZ cannot serve as a drop-in replacement. A redesign of the clock generation stage, loop filter, and PCB layout would be required, and the system would need an external PLL/VCO to replace the AD9516-4BCPZ's integrated functions.
What are the typical applications for each device?
The AD9514BCPZ is typically used for low-jitter clock distribution in applications such as data converters, networking, and instrumentation where an external clock source is already available. The AD9516-4BCPZ is used in applications requiring both clock generation and distribution, such as wireless base stations, broadband infrastructure, and high-speed data acquisition systems, where its integrated PLL/VCO reduces board space and component count.