SY89874UMG - 2.5 GHz 1:2 Clock Fanout Buffer | Microchip
MPN: SY89874UMG ✓ ActiveSY89874UMG Overview
A clock buffer is a digital semiconductor device used to distribute one clock signal to multiple destinations while controlling impedance, edge rate, skew, and loading. Clock divider and fanout buffers belong to the broader clock and timing IC family, where they support clock generation, frequency translation, distribution, and sequencing functions in communications, industrial, and computing systems. This device combines those functions in one package rather than requiring separate divider and fanout stages.
Key characteristics include a maximum clock frequency of 2.5 GHz, a programmable divide ratio, low-skew and low-jitter operation, and 2.5 V or 3.3 V LVPECL output capability. The 16-VFQFN exposed-pad package supports compact high-speed layouts while providing a thermal and ground connection beneath the device. Differential clock routing helps reduce susceptibility to common-mode noise, although correct termination and controlled impedance remain essential.
The SY89874U family is associated with clock-tree designs that require a lower-speed derivative of a high-frequency source. Typical uses include communications clock distribution, processor and serializer clock conditioning, data-converter clocking, industrial control systems, and test-and-measurement equipment. The differential input can be driven from CML, LVPECL, LVDS, or HSTL-compatible sources when their voltage and termination requirements are satisfied.
For layout, route the differential clock pair as a short, tightly coupled pair and place termination close to the receiving device. Keep the output return path continuous and observe the exposed-pad connection requirements in the manufacturer datasheet. Decoupling capacitors should be positioned near the supply and ground pins to minimize supply inductance and edge-rate distortion.
This page combines the product identity, manufacturer family information, price-evidence checks, drop-in cross-reference results, and application-focused design guidance. It also distinguishes the verified SY89874UMG ordering code from the SY89874U family entry and identifies where additional datasheet parameters must be checked before release to production.
Drop-in alternatives for SY89874UMG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
SY89834UMG
✅ Drop-In📋 Reference alternative (not in catalog)
SY89874UMG Specifications
| Product Type | Programmable clock divider and fanout buffer |
| Maximum Clock Frequency | 2.5 GHz |
| Fanout Ratio | 1:2 |
| Supply Voltage Range | 2.375 V to 3.63 V |
| Nominal Supply Options | 2.5 V or 3.3 V |
| Output Logic | LVPECL |
| Accepted Input Logic Families | CML, LVPECL, LVDS, or HSTL |
| Input Configuration | Differential |
| Operating Temperature Range | -40 C to +85 C |
| Package | 16-VFQFN with exposed pad, 16-MLF |
| Mounting Type | Surface mount |
| Divider Function | Programmable |
SY89874UMG 16-vfqfn with exposed pad, 16-mlf Pin Configuration Guide
Pin configuration for SY89874UMG (16-vfqfn with exposed pad, 16-mlf package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for SY89874UMG.
Refer to the datasheet for full pin configuration.
Typical Applications
SY89874UMG is suitable for 6 applications: Communications Clock Distribution, Processor and Serializer Clocking, Data Converter Clocking, Industrial Control Clock Trees, Test and Measurement Instrumentation, Network Equipment Clocking.
Communications Clock Distribution
The SY89874UMG fits communications clock-tree designs that require one differential source to feed two destinations while also producing a divided, frequency-locked clock. Its input stage accepts CML, LVPECL, LVDS, or HSTL-compatible signals, and its maximum clock frequency is 2.5 GHz. In a communications card, the device can divide a high-speed source into a lower-speed related clock for a transceiver, serializer, or controller. The 1:2 fanout simplifies distribution, while the exact divide setting and output configuration must be selected from the family timing information.
Recommended
Processor and Serializer Clocking
The SY89874UMG is appropriate for clock conditioning ahead of processors, serializers, and other high-speed digital blocks that need a related lower-speed clock. By dividing a 2.5 GHz-capable source into a frequency-locked output, the device can reduce the frequency delivered to a downstream circuit without breaking the relationship to the original reference. The 1:2 fanout can also serve a second branch of the clock tree. Source amplitude, divider configuration, and output loading should be validated together so edge quality remains suitable for the receiving logic.
Recommended
Data Converter Clocking
The SY89874UMG can support clock-tree designs around data converters that benefit from a divided and distributed reference clock. Its differential input reduces sensitivity to common-mode disturbance, while the programmable divider creates a lower-speed clock related to the high-speed source. Two outputs can feed separate converter channels or adjacent digital blocks. The implementation should preserve short return paths, use controlled-impedance routing, and confirm that the converter receives the required frequency, amplitude, and jitter performance at its input pin.
Recommended
Industrial Control Clock Trees
The SY89874UMG is suitable for industrial control electronics that need a deterministic relationship between a high-speed reference and a lower-speed system clock. Its operating range of -40 C to +85 C supports equipment intended for extended temperature environments, while the 2.375 V to 3.63 V supply range accommodates 2.5 V and 3.3 V logic systems. The 1:2 fanout can serve two control or communication blocks from one divided source. Industrial layouts should also account for ground continuity, decoupling placement, and the exposed-pad thermal path.
Recommended
Test and Measurement Instrumentation
The SY89874UMG can divide and fan out a high-frequency clock within laboratory and test equipment where multiple subsystems need a coherent, lower-speed reference. Its 2.5 GHz upper operating frequency accommodates demanding clock trees, and the programmable division ratio permits the output frequency to remain related to the input. The 1:2 distribution function reduces the number of separate fanout stages required. Instrument designers should minimize trace length, maintain symmetric differential geometry, and verify jitter and skew at the final receiver rather than only at the device output.
Recommended
Network Equipment Clocking
The SY89874UMG is a practical choice for network-equipment clock trees that require programmable division and fanout from a differential reference. It accepts several common high-speed logic formats, including LVPECL and LVDS, which can simplify integration with adjacent clock sources. The resulting divided outputs can support serializers, network processors, or monitoring sections while retaining a frequency relationship to the primary reference. Board-level qualification should include return-loss review, termination selection, and a check of clock amplitude against the input thresholds of every connected receiver.
Recommended
Recommended Products Summary
Engineering reference data for SY89874UMG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SY89834UMG |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 16-VFQFN exposed pad, 16-MLF | MLF-16 |
Key Differentiators
- Combines programmable division with 1:2 clock distribution (vs SY89834UMG)
- Supports multiple differential input logic families (vs SY89834UMG)
- Compact exposed-pad implementation (vs SY89834UMG)
Design Notes
Route the differential clock input as a short, tightly coupled pair with a continuous reference plane beneath it. Place any input termination directly at the receiving pin and avoid adding stubs or test pads that create discontinuities. Because the SY89874UMG can operate up to 2.5 GHz, trace geometry, layer transitions, connector launches, and nearby return-path discontinuities can materially affect signal integrity.
Place the input, output, and supply-routing network so the clock path does not loop through noisy digital regions. Keep output traces short and use controlled impedance appropriate for the intended logic interface. The exposed pad beneath the 16-VFQFN should follow the manufacturer land pattern and connect to the ground reference as specified; use adequate thermal-via density for the assembly process.
Do not assume that CML, LVPECL, LVDS, and HSTL input acceptance makes every source electrically interchangeable. Confirm input thresholds, common-mode voltage, signal amplitude, termination, and edge rate for the actual driver. Likewise, verify the selected divide ratio and output configuration against the SY89874U family timing information before releasing the clock tree to production.
Evaluate the complete source-to-receiver path rather than relying only on the nominal 2.5 GHz device rating. Receiver thresholds, source slew rate, termination tolerance, and output loading all influence whether clean edges are available at the far end. For a replacement decision, compare divider-control timing, output levels, and propagation behavior for SY89874UMG and SY89834UMG across every operating mode used by the design.
Compliance Information
The available product information does not provide definitive compliance statements for the SY89874UMG. Compliance and qualification status must be confirmed from the current Microchip product documentation and the applicable declaration documents.
