NB3V1104CMTTBG - 1:4 LVCMOS Fanout Buffer 250MHz | onsemi
Référence : NB3V1104CMTTBG ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.44 | $2,44 |
| 10 | $2.2 | $22,00 |
| 100 | $1.85 | $185,00 |
| 500 | $1.62 | $810,00 |
| 1 000 | $1.45 | $1 450,00 |
NB3V1104CMTTBG Présentation
A clock buffer (or clock fanout buffer) is a timing component that receives a single reference clock on its input and reproduces multiple copies of that clock on its outputs. Clock buffers sit between an upstream clock source - such as a crystal oscillator, PLL, or serializer - and downstream loads such as processors, FPGAs, memory controllers, and switch fabrics. Their primary function is to preserve signal integrity while distributing a low-jitter, low-skew clock to multiple destinations that cannot share a single trace.
Key features of the NB3V1104CMTTBG include very low additive jitter, low output-to-output skew within the 1:4 fan-out, and a wide operating temperature range. The 8-WDFN package measures only 2x2 mm, making it suitable for dense PCB layouts in networking, computing, and consumer electronics. Onsemi's NB3V110xC family is designed so that the 1:2, 1:3, 1:4, 1:6, and 1:8 variants share pin compatibility, which simplifies board bring-up and second-source qualification.
Architecturally, the part uses a differential-input/single-ended output stage optimized for LVCMOS signaling. The input is designed to be driven by a 3.3 V, 2.5 V, or 1.8 V LVCMOS source, and the outputs swing rail-to-rail into standard LVCMOS receivers. Internal bias networks and ESD protection support robust operation in industrial environments.
Typical applications include Ethernet switches and routers, fan-out for FPGA reference clocks, server and storage backplanes, set-top boxes, and PCI Express cards. The wide operating voltage range makes it a flexible choice when the system clock rail varies between 1.8 V and 3.3 V across board revisions.
When designing with this device, ensure the output trace lengths to matched outlets are length-matched within the application's tolerance window to control board-induced skew. Place a 0.1 uF decoupling capacitor close to the VDD pin and provide a solid ground return to minimize jitter contribution from the supply.
This page synthesizes distributor pricing as of 2026-10-09, drop-in alternatives across vendors, and practical design notes that are not collected in any single manufacturer document.
Alternatives de remplacement direct pour NB3V1104CMTTBG — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec NB3V1104CMTTBG (même facteur de forme et même empreinte) — différant par Function, Number of Outputs, Operating Temperature, Output Type, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
NB3V1104CMNTWG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
NB3V1102CMTTBG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
NB3V1103CMTTBG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
NB3V1106CMTTBG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
NB3V1108CMTTBG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SY89833UMG
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
NB3V1104CMTTBG Spécifications
| Fonction | Clock Fanout Buffer (Distribution) |
| Nombre de sorties | 4 (1:4) |
| Maximum Frequency | 250 MHz |
| Input Type | LVCMOS (3.3 V / 2.5 V / 1.8 V) |
| Type de sortie | LVCMOS |
| Operating Voltage Range | 1.8 V to 3.3 V |
| Supply Voltage (VDD) | 3.3 V nominal |
| Boîtier | 8-WDFN (2x2 mm) |
| Type de montage | Surface Mount |
| Nombre de broches | 8 |
| Température de fonctionnement | -40C to +85C |
| Statut RoHS | Compliant |
Configuration des broches de NB3V1104CMTTBG
| Broche 1 | CLK_IN — LVCMOS clock input (3.3 V / 2.5 V / 1.8 V) |
| Broche 2 | GND — Ground |
| Broche 3 | VDD — Supply voltage |
| Broche 4 | Q1 — LVCMOS clock output 1 |
| Broche 5 | Q2 — LVCMOS clock output 2 |
| Broche 6 | Q3 — LVCMOS clock output 3 |
| Broche 7 | Q4 — LVCMOS clock output 4 |
| Broche 8 | NC — Not connected (per datasheet) |
Applications typiques
NB3V1104CMTTBG convient pour 6 applications: Ethernet Switch Clock Distribution, FPGA Reference Clock Fanout, Server and Storage Backplane Timing, Set-Top Box and Consumer Audio/Video Timing, PCI Express Card Clock Distribution, Industrial Control and IoT Edge Gateways.
Ethernet Switch Clock Distribution
The NB3V1104CMTTBG distributes a single reference clock to four downstream MAC, PHY, or switch ASIC blocks in Ethernet switch designs. With 250 MHz support, it covers 1000BASE-T / RGMII timing budgets, while the 3.3 V/2.5 V/1.8 V LVCMOS input flexibility lets the same buffer serve different board revisions without redesign. Placed near the switch ASIC with matched trace lengths to each load, it preserves low skew across the four outputs.
Recommandé
FPGA Reference Clock Fanout
The NB3V1104CMTTBG fans a single crystal oscillator or PLL output to multiple FPGA banks, GT transceivers, or companion chips that need synchronous timing. Its low additive jitter keeps phase noise budgets intact for SERDES links, and the 8-WDFN 2x2 mm footprint sits comfortably under the FPGA BGA on dense boards. The 1.8 V-3.3 V LVCMOS input range supports both modern and legacy FPGA I/O standards.
Recommandé
Server and Storage Backplane Timing
The NB3V1104CMTTBG provides redundant fanout of backplane reference clocks to SAS/SATA controllers, BMC chips, and management processors in server and storage designs. The wide -40C to +85C industrial temperature range supports thermally demanding chassis environments, while the 1:4 fanout covers most BMC + controller + expander configurations from a single oscillator. Pin compatibility across the NB3V110xC family also lets designers substitute 1:6/1:8 variants on denser boards.
Recommandé
Set-Top Box and Consumer Audio/Video Timing
The NB3V1104CMTTBG distributes a low-jitter reference clock to HDMI transmitters, audio CODECs, and main application processors in set-top box designs. Its compact 8-WDFN package fits inside space-constrained enclosures, while the LVCMOS interface integrates cleanly with mainstream SoCs that expose 1.8 V or 3.3 V clock inputs. Low additive jitter is critical for HDMI pixel clock fidelity.
Recommandé
PCI Express Card Clock Distribution
The NB3V1104CMTTBG fans the 100 MHz PCIe reference clock from a slot or onboard oscillator to multiple PCIe endpoints, retimers, or switch chips on add-in cards. Its LVCMOS output swing matches standard PCIe clock receiver inputs, and the 250 MHz frequency ceiling accommodates Spread Spectrum Clocking profiles used in PCIe Gen 2/3/4 designs. The compact package fits alongside dense BGA devices on PCIe cards.
Recommandé
Industrial Control and IoT Edge Gateways
The NB3V1104CMTTBG provides robust clock fanout for industrial IoT edge gateways that aggregate multiple sensor buses, wireless radios, and main processors. The -40C to +85C industrial temperature rating supports factory floor and outdoor cabinet installations, while the 3.3 V/2.5 V/1.8 V LVCMOS input flexibility matches a wide range of industrial SoCs and wireless modules from Microchip, NXP, and others.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour NB3V1104CMTTBG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | NB3V1104CMNTWG | NB3V1102CMTTBG | NB3V1103CMTTBG | NB3V1106CMTTBG | NB3V1108CMTTBG | SY89833UMG |
|---|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | onsemi | onsemi | onsemi | Microchip Technology |
| Package | 8-WDFN | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same | 8-WDFN - same |
| Fanout Ratio | 1:4 | 1:4 | 1:2 | 1:3 | 1:6 | 1:8 | 1:4 |
| Input Logic | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS 3.3V/2.5V/1.8V | LVCMOS |
| Output Logic | LVCMOS | LVCMOS | LVCMOS | LVCMOS | LVCMOS | LVCMOS | LVCMOS |
| Family Compatibility | NB3V110xC (1:4) | NB3V110xC (1:4) - same | NB3V110xC (1:2) | NB3V110xC (1:3) | NB3V110xC (1:6) | NB3V110xC (1:8) | Microchip SY89833U family |
Principaux différenciateurs
- Pin-compatible scalability across the NB3V110xC family (vs NB3V1108CMTTBG)
- Wide LVCMOS input voltage compatibility (1.8 V to 3.3 V) (vs SY89833UMG)
- Compact 2x2 mm 8-WDFN package for dense layouts (vs Larger TSSOP-8 clock buffers)
Notes de conception
Match the trace lengths from the four NB3V1104CMTTBG outputs to their respective loads within the application-specific tolerance window (typically 50-100 mil for 100 MHz LVCMOS). For 250 MHz operation, keep matched lengths to within 25 mil to control board-induced skew. Route outputs on the same layer with continuous ground return and avoid vias on each output to minimize impedance discontinuities.
Place a 0.1 uF decoupling capacitor as close as possible to the NB3V1104CMTTBG VDD pin, with a wider-trace power pour feeding it. Use a ferrite bead to isolate the buffer's VDD from noisy digital rails (such as switching regulators) since supply noise couples directly into jitter through the internal bias networks.
Drive the NB3V1104CMTTBG CLK_IN pin from a low-jitter source (crystal oscillator or PLL output) with a series damping resistor of 33 ohm if the source impedance differs from 50 ohm. Terminate long input traces with the characteristic impedance to prevent reflections that can double-clock the input stage. For multi-output synchronization, ensure the input edge rate is faster than 1 ns/V.
Do not leave NB3V1104CMTTBG outputs floating when unused; tie unused Q outputs to ground through a 10 kohm resistor to prevent oscillation. Avoid placing the device near switching DC-DC converters without proper ground plane isolation, as 50 MHz+ switching edges can inject spurious content into the LVCMOS outputs.
Informations de conformité
RoHS and lead-free compliance indicated by onsemi distributor listings. REACH, halogen-free, and conflict-mineral status not explicitly listed in retrieved web data - default unknown per data authenticity policy.
